EP0056582A1 - Verfahren zur Herstellung von mit halogenierten Alkoholen modifizierten Polyisocyanurat-Dispersionen und daraus hergestellte Zusammensetzungen - Google Patents

Verfahren zur Herstellung von mit halogenierten Alkoholen modifizierten Polyisocyanurat-Dispersionen und daraus hergestellte Zusammensetzungen Download PDF

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Publication number
EP0056582A1
EP0056582A1 EP82100059A EP82100059A EP0056582A1 EP 0056582 A1 EP0056582 A1 EP 0056582A1 EP 82100059 A EP82100059 A EP 82100059A EP 82100059 A EP82100059 A EP 82100059A EP 0056582 A1 EP0056582 A1 EP 0056582A1
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Prior art keywords
polyol
catalyst
polymer
prepared
organic polyisocyanate
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English (en)
French (fr)
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Thirumurti Narayan
John Thomas Patton, Jr.
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BASF Corp
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BASF Wyandotte Corp
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08—Processes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/2805—Compounds having only one group containing active hydrogen
    • C08G18/288—Compounds containing at least one heteroatom other than oxygen or nitrogen
    • C08G18/2885—Compounds containing at least one heteroatom other than oxygen or nitrogen containing halogen atoms
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/409—Dispersions of polymers of C08G in organic compounds having active hydrogen
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
    • C08G18/78—Nitrogen
    • C08G18/79—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates
    • C08G18/791—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing isocyanurate groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2375/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2479/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen, or carbon only, not provided for in groups C08J2461/00 - C08J2477/00
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S521/00—Synthetic resins or natural rubbers -- part of the class 520 series
    • Y10S521/902—Cellular polymer containing an isocyanurate structure

Definitions

  • the present invention relates to polyisocyanurate polymers modified with halogenated alcohols, to an improved process for the preparation of polyisocyanurate dispersions, and to cellular and non-cellular polyurethane products prepared from said polyisocyanurate dispersions. More particularly, the invention relates to polyisocyanurate polymers, an improved process for the preparation of polyisocyanurate dispersions of said polymers in polyols, and to cellular and non-cellular polyurethane products with improved flame retardancy prepared employing said dispersions.
  • the prior art generally teaches the preparation of isocyanurate-modified isocyanate products employing a variety of catalysts.
  • U.S. Patent No. 3,996,223 which teaches a process for preparing polyisocyanates containing isocyanurate structures by polymerization in the presence of a mixture of Mannich bases and carbamic acid esters.
  • U.S. Patent No. 3,645,979 teaches the use of an organic phosphine catalyst to prepare isocyanurate structures.
  • 3,652,424 teaches a process for the preparation of polyisocyanate compositions containing 5 to 19 percent by weight toluene diisocyanate trimer employing substituted guanidines and isobiguanides as catalysts.
  • 4,125,491 teaches the preparation of a composition of matter which consists of the reaction product of trimerized toluene diisocyanate with about 0.02 to 0.25 equivalent, based on free isocyanate groups, of an active hydrogen compound which may either be a secondary aliphatic monoamine containing 24 to 36 carbon atoms or a mixture of such amine with an aliphatic alcohol containing 12 to 24 carbon atoms and dispersed in a mixture of toluene and heptane. Not more than 25 percent of the free NCO groups are allowed to react with the active hydrogen compounds.
  • This patent further teaches the use of the dispersions as adhesives or surface coating compositions.
  • the present invention relates to an improved process for the preparation of dispersible polyisocyanurate polymers modified with halogenated alcohol, dispersions of the polyisocyanurate polymer in polyols and the improved flame retardant polyurethane products prepared from these polyisocyanurate polyol dispersions.
  • polyisocyanurate polymers are prepared by polymerization of polyisocyanates using appropriate trimerization catalysts. These polyisocyanurate polymers are then dispersed in polyols. The dispersions of the polyisocyanurate polymers in polyols are then employed for the preparation of polyurethane foams.
  • the polyisocyanurate polymers and dispersions thereof are prepared by several improved procedures over that of copending applications Serial Nos. , .
  • the polyisocyanurate polymer may be prepared by the polymerization of a 5 to 50 percent solution of an organic polyisocyanate in ethyl acetate or any other suitable solvent or mixtures thereof in the presence of catalytic quantities of a trimerization catalyst.
  • the temperature of the mixture is maintained at about -0°C for up to four hours at which time the free NCO value of the reaction mixture is reduced to the desired value.
  • Benzoyl chloride is then added to deactivate said catalyst.
  • a monofunctional halogenated active hydrogen compound is reacted with the residual NCO groups. This mixture is allowed to react at 50°C for 2 hours.
  • a catalyst such as dibutyltin dilaurate may be employed to increase this reaction rate.
  • the reaction contents are then transferred into the desired polyol while the polyol is stirred at high speeds.
  • the solvent is then removed by stripping at pressures of 2 millimeters of Hg and temperatures of 70 to 80°C.
  • the temperature of the dispersion is preferably not allowed to increase above 100°C.
  • concentration of polyisocyanurate polymer dispersed in the polyoxyalkylene polyether or polyester polyol may range from 1 to 80 percent by weight, preferably from 5 to 50 percent by weight.
  • the uncapped polyisocyanurate polymers of the invention may be represented by the following equation when the isocyanate used is difunctional. Comparable structures will be formed when tri-, tetra- and polyisocyanates are employed. wherein Z is at least 3 and Y is and wherein R' is as described hereinafter, Assuming that R' is the resulting free NCO content decreases from 48.3 percent to about 8.0 for one of the polymers of this invention, and has an equivalent weight based on end group analysis of 522.
  • the trimer of toluene diisocyanate has a free NCO content of 24.2 percent and an equivalent weight of 174.
  • the equivalent weights of the polyisocyanurate polymers of the invention are greater than 174 and have a free NCO content of less than 24.2 percent.
  • the preferred equivalent weights range from 210 to 4200 with free NCO contents ranging from about 1 to 16 percent based on the polymer weight.
  • the free NCO contents are determined by methods well known to those skilled in the art. These include the titration of a solution of the polyisocyanate compound with a solution of dibutylamine followed by back titration of the excess unreacted amine with an alcoholic HC1 solution.
  • the polyisocyanurate polymers are essentially free of the starting polyisocyanate monomer.
  • Any halogenated, aliphatic alicyclic, aryl, alkaryl, aralkyl alcohol which is capable of reacting with an isocyanate group may be employed to react with the free isocyanate groups remaining in the polymer.
  • These alcohols have the formula wherein R may be an alkyl containing from 2 to 20 carbon atoms, cycloalkyl containing from 5 to 10 carbon atoms, an aryl, alkaryl, or aralkyl radical containing from 6 to 20 carbon atoms, and X may be chlorine, bromine or iodine and n may range from 1 to 6.
  • n 1 to 20.
  • Those contemplated include alcohols such as methyl, ethyl, normal propyl and isopropyl, primary, secondary and tertiary butyl, primary, secondary and tertiary amyl, hexyl, heptyl,octyl, nonyl, decyl, undecyl, eicosyl, methylpentyl, 2-ethylbutyl, 2-ethylhexyl, methyl- amyl, 2-octanol, 2,6-dimethyl-4-heptanol, 2,6,8-triethyl-4- nonanol and mixtures thereof.
  • Unsaturated alcohols having the formula wherein n is 2 to 20, may also be employed. These include such alcohols as vinyl and allyl alcohol.
  • halogenated alcohols contemplated herein include for example, 2,3-dichloropropanol, 2,3-dibromopropanol, 2,4,4,4-tetrachloro- butanol, 2,2,2-trichloroethanol, 2,2,2-tribromoethanol, 1,1,1,3,3,3-hexachloro-2-propanol, 1,1-dichloro-2-propanol, 1,3-dibromo-2-propanol, 1,1,1-trichloro-2-propanol, 1,1,3,3-tetrabromo-2-propanol, the isomeric tribromophenols, the isomeric tetrachlorophenols, pentachlorophenol, 2-methylol-1,4,5,6,7,7-hexachlorobicyclo-(2.2.1)-5-heptene and the like.
  • reaction products of halogenated alkylene oxides .and monofunctional active hydrogen compounds are useful in the present invention.
  • hydroxyl containing compounds such as 1-methoxy-4,4,4-trichloro-2-butanol, 1-ethoxy-3,3,3-trichloro-2-propanol, 2-methoxy-3,3-dichloropropanol and the like may be used.
  • the monofunctional active hydrogen compounds are employed in such concentrations that they will react with from 1 to 24 percent of the free NCO groups present.
  • the halogenated alcohols are employed in such concentrations that they will react with from 1 to 24 percent of the free NCO groups present.
  • the ratio of monofunctional active hydrogen compound to halogenated alcohol may range from 1:9 to 9:1.
  • the organic polyisocyanate employed in the instant invention corresponds to the formula R'(NCO) z where R' is a polyvalent organic radical which is either aliphatic, arylalkyl, alkylaryl, aromatic or mixtures thereof and z is an integer which corresponds to the valence of R' and is at least 2.
  • organic polyisocyanates contemplated herein include, for example, 1,2-diisocyanatoethane, 1,3-diisocyanatopropane, 1,2-diisocyanatopropane, 1,4-diisocyanatobutane, 1,5-diisocyanato- pentane, 1,6-diisocyanatohexane, bis(3-isocyanatopropyl)-ether, bis(3-isocyanatopropyl)sulfide, 1,7-diisocyanato- heptane, 1,5-diisocyanato-2,2-dimethylpentane, 1,6-diiso- .
  • cyanate-3-methoxyhexane 1,8-diisocyantooctane, 1,5-diisocyanato-2,2,4-trimethylpentane, 1,9-diisocyanatononane, 1,10-diisocyanatopropyl ether of 1,4-butylene glycol, 1,11-diisocyanatoundecane, 1,12-diisocyanatododecane, bis(iso- cyanatohexyl) sulfide, 1,4-diisocyanatobenzene, 1,3-diisocyanato-o-xylene, 1,3-diisocyanato-p-xylene, 1,3-diisocyanato-m-xylene, 2,4-diisocyanato-1-chlorobenzene, 2,4-diisocyanato-1-nitrobenzene, 2,5-diisocyanato-l-nitrobenz
  • toluene diisocyanate 2,4'-diphenylmethane diisocyanate, 4,4'-diphenylmethane diisocyanate, polymethylene polyphenylene polyisocyanate and mixtures thereof.
  • the polyisocyanurate polymers of the instant invention may be prepared by employing well-known compounds as trimerization catalysts.
  • these catalysts are (a) organic strong bases, (b) tertiary amine co-catalyst combinations, (c) Friedel Craft catalsyts, (d) basic salts of carboxylic acids, (e) alkali metal oxides, alkali metal alcoholates, alkali metal phenolates, alkali metal hydroxides and alkal metal carbonates, (f) onium compounds from nitrogen, phosphorus, arsenic, antimony, sulfur and selenium, and (g) mono-substituted monocarbamic esters.
  • 1,3,5-tris(N,N-dialkylaminoalkyl)-s-hexahydrotriazines include 1,3,5-tris(N,N-dialkylaminoalkyl)-s-hexahydrotriazines; the alkylene oxide and water additives of 1,3,5- tris(N,N-dialkylaminoalkyl)-s-hexahydrotriazines; 2,4,6- tris(dimethylaminomethyl)phenol; ortho, para- or a mixture of o- and p-dimethylaminomethyl phenol and triethylenediamine or the alkylene oxide and water additives thereof, metal carboxylates such as lead octanoate, sodium and potassium salts of hydroxamic acid, and organic boron- containing compounds.
  • Monofunctional alkanols containing from 1 to 24 carbon atoms, epoxides containing 2 to 18 carbon atoms and alkyl carbonates may be used in conjunction with
  • the concentration of trimerization catalysts that may be employed in the present invention is from 0.001 part to 20 parts of catalyst per 100 parts of organic polyisocyanate.
  • the temperature ranges which may be employed for the polymerization reaction may range from 25°C to 230°C, preferably from 25°C to 120°C.
  • the trimerization catalysts may be deactivated employing an acid or an acid chloride.
  • the acids such as hydrochloric acid, sulfuric acid, acetic acid, oxalic acid, phosphonic acid, methanesulfonic acid, trifluoromethanesulfonic acid, benzene, toluene or xylene sulfonic acids, acid chlorides such as acetyl or benzoyl chloride, and sulfonyl chlorides such as benzene, toluene or xylene sulfonyl chloride may be employed.
  • Another series of deactivators are alkylating agents such as dimethyl sulfate, o, or p-alkyl toluenesulfonates, methyl chloride may also be employed.
  • the solvents which may be employed are those in which the organic polyisocyanates are soluble. These include, for example, acetone, acetonitrile, acetophenone, allyl acetate, benzyl cellosolve, bromobenzene, o-bromostyrene, o-bromotoluene, p-bromotoluene, butyl acetate, 2-butyl acetate, butyl benzoate, butyl cellosolve acetate, N-butylcyclohexane, carbon tetrachloride, cellosolve acetate, 2-chloro-1,3-butadiene, chloroform, cyclohexane, cyclohexanone, dibutyl cellosolve, dibutyl maleate, dibutyl phthalate, o-dichlorobenzene, m-dichlorobenzene, p-dichlorobenzene, 1,1-dich
  • Precipitating nonsolvents which may be employed are: decane, 2,2-dimethylbutane, 2,3-dimethylbutane, 2,2-dimethylhexane, 2,3-dimethylhexane, 3,3-dimethylhexane, 3,4-dimethylhexane, 2,5-dimethylhexane, 2,2-dimethylpentane, 2,3-dimethylpentane, 2,4-dimethylpentane, 3,3-dimethylpentane, 2,2-dimethylpropane, ethylcyclohexane, ethylcyclo- pentane, 3-ethylhexane, heptane, 1-heptene, 3-heptene-2-one, 1-hexene, 2-methylheptane, 3-methylheptane, 4-methylheptane, 2-methylhexane, 3-methylhexane, 2-methylpentane, 3-methylpentane,
  • rigid, flexible, and microcellular foams may be prepared by the catalytic reaction of organic polyisocyanates with polyols containing therein the dispersed polyisocyanurate polymer in the presence of blowing agents, surfactants and other additives which may be deemed necessary.
  • Non-cellular products may be prepared in the absence of blowing agents.
  • Typical polyols which may be employed in the preparation of the foams of the instant invention include polyhydroxyl-containing polyesters, polyoxyalkylene polyether polyols, polyhydroxy-terminated polyurethane polymers, polyhydroxyl-containing phosphorus compounds, and alkylene oxide adducts of polyhydric sulfur-containing esters, polyacetals, aliphatic polyols or diols, ammonia, and amines including aromatic, aliphatic and heterocyclic amines as well as mixtures thereof.
  • Alkylene oxide adducts of compounds which contain two or more different groups within the above-defined classes may also be used such as amino alcohols which contain an amino group and a hydroxyl group, Also, alkylene oxide adducts of compounds which contain one -SH group and one -OH group as well as those which contain an amino group and a -SH group may be used.
  • the equivalent weight of the polyols will vary from 100 to 10,000, preferably from 1000 to 3000.
  • Any suitable hydroxy-terminated polyester may be used such as are obtained, for example, from the reaction of polycarboxylic acids and polyhydric alcohols.
  • Any suitable polycarboxylic acid may be used such as oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, brassylic acid, thapsic acid, maleic acid, fumaric acid, glutaconic acid, a-hydromuconic acid, s-butyl-a-ethyl-glutaric acid, a,6-diethylsuccinic acid, isophthalic acid, terephthalic acid, hemimellitic acid, and 1,4-cyclohexanedicarboxylic acid.
  • polyhydric alcohol Any suitable polyhydric alcohol may be used such as ethylene glycol, propylene glycol, trimethylene glycol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, 1,2-pentanediol, 1,4-pentanediol, 1,5-pentanediol, 1,6-hexanediol, 1,7-heptanediol, glycerol, 1,1,1-trimethylolpropane, 1,1,1-trimethylolethane, 1,2,6-hexanetriol, a-methyl glucoside, pentaerythritol,and sorbitol.
  • polyhydric alcohol compounds derived from phenol such as 2,2-bis(4-hydroxyphenyl)propane, commonly known as Bisphenol A.
  • Any suitable polyoxyalkylene polyether polyol may be used such as the polymerization product of an alkylene oxide with a polyhydric alcohol. Any suitable polyhydric alcohol may be used such as those disclosed above for use in the preparation of the hydroxy-terminated polyesters. Any suitable alkylene oxide may be used such as ethylene oxide, propylene oxide, butylene oxide, amylene oxide, and mixtures of these oxides.
  • the polyalkylene polyether polyols may be prepared from other starting materials such as tetrahydrofuran and alkylene oxide-tetrahydrofuran mixtures; epihalo- hydrins such as epichlorohydrin; as well as aralkylene oxides such as styrene oxide.
  • the polyalkylene polyether polyols may have either primary or secondary hydroxyl groups. Included among the polyether polyols are polyoxyethylene glycol, polyoxypropylene glycol, polyoxybutylene glycol, polytetramethylene glycol, block copolymers, for example, combinations of polyoxypropylene and polyoxyethylene glycols, poly-1,2-oxybutylene and polyoxyethylene glycols, poly-1,4-tetramethylene and polyoxyethylene glycols,and copolymer glycols prepared from blends as well as sequential addition of two or more alkylene oxides.
  • the polyalkylene polyether polyols may be prepared by any known process such as, for example, the process disclosed by Wurtz in 1859 and Encyclopedia of Chemical Technology, Vol.
  • Polyethers which are preferred include the alkylene oxide addition products of trimethylolpropane, glycerine, pentaerythritol, sucrose, sorbitol, propylene glycol, and 2,2-bis(4-hydroxyphenyl)-propane and blends thereof having equivalent weights of from 100 to 5000.
  • Suitable polyhydric polythioethers which may be condensed with alkylene oxides include the condensation product of thiodiglycol or the reaction product of a dicarboxylic acid such as is disclosed above for the preparation of the hydroxyl-containing polyesters with any other suitable thioether glycol.
  • the hydroxyl-containing polyester may also be a polyester amide such as is obtained by including some amine or amino alcohol in the reactants for the preparation of the polyesters.
  • polyester amides may be obtained by condensing an amino alcohol such as ethanolamine with the polycarboxylic acids set forth above or they may be made using the same components that make up the hydroxyl-containing polyester with only a portion of the components being a diamine such as ethylene diamine.
  • Polyhydroxyl-containing phosphorus compounds which may be used include those compounds disclosed in U.S. Patent No. 3,639,542.
  • Preferred polyhydroxyl-containing phosphorus compounds are prepared from alkylene oxides and acids of phosphorus having a P 205 equivalency of from about 72 percent to about 95 percent.
  • Suitable polyacetals which may be condensed with alkylene oxides include the reaction product of formaldehyde or other suitable aldehyde with a dihydric alcohol or an alkylene oxide such as those disclosed above.
  • Suitable aliphatic thiols which may be condensed with alkylene oxides include alkanethiols containing at least two -SH groups sucha s 1,2-ethanedithiol, 1,2-propanedithiol, 1,2-propanedithiol, and 1,6-hexanedithiol ? alkene thiols such as 2-butene-1,4-dithiol; and alkyne thiols such as 3-hexyne-1,6-dithiol.
  • Suitable amines which may be condensed with alkylene oxides include aromatic amines such as aniline, o-chloroaniline, p-aminoaniline, 1,5-diaminonaphthalene, methylene dianiline, the condensation products of aniline and formaldehyde, and diaminotoluene; aliphatic amines such as methylamine, triisopropanolamine, ethylene diamine, 1,3-diaminopropane, 1,3-diaminobutane,and 1,4-diaminobutane.
  • aromatic amines such as aniline, o-chloroaniline, p-aminoaniline, 1,5-diaminonaphthalene, methylene dianiline, the condensation products of aniline and formaldehyde, and diaminotoluene
  • aliphatic amines such as methylamine, triisopropanolamine, ethylene diamine, 1,3
  • the polyurethane foams of the present invention may also be prepared by the reaction of an organic polyisocyanate with a graft polymer polyol containing therein the dispersed polyisocyanurate polymer of the invention in the presence of a blowing agent and optionally in the presence of additional polyhydroxyl-containing components, chain-extending agents, catalysts, surface-active agents, stabilizers, dyes, fillers and pigments.
  • a blowing agent Suitable processes for the preparation of cellular polyurethane plastics are disclosed in U.S. Reissue Patent 24,514 together with suitable machinery to be used in conjunction therewith.
  • blowing agents are generally not necessary. If desired for more expanded foams, they may be employed. When water is used, corresponding quantities of excess isocyanate to react with the water and produce carbon dioxide are necessary.
  • low boiling hydrocarbons such as pentane,hexane, heptane, pentene, and heptene
  • azo compounds such as azohexahydrobenzodinitrile
  • halogenated hydrocarbons such as dichlorodifluoromethane, trichlorofluoromethane, dichlorodi- fluoroethane, vinylidene chloride, and methylene chloride may be used as blowing agents.
  • Chain-extending agents which may be employed in the preparation of the polyurethane foams include those compounds having at least two functional groups bearing active hydrogen atoms such as water, hydrazine, primary and secondary diamines, amino alcohols, amino acids, hydroxy acids, glycols, or mixtures thereof.
  • a preferred group of chain-extending agents includes water, ethylene glycol, 1,4-butanediol, and primary and secondary diamines which react more readily with the polyisocyanates than does water.
  • phenylenediamine ethylenediamine, diethylenetriamine, N-(2-hydroxypropyl)-ethylenediamine, N,N'-di(2-hydroxypropyl)ethylenediamine, piperazine, 2-methylpiperazine, isophrone diamine, 2,4-diamino-3,5-diethyl- toluene and isomers thereof, 3,3',5,5'-tetraisopropyl-4,4'- diaminodiphenylmethane and the like, 4,4'-diaminodiphenylmethane, and 4,4'-diaminodicyclohexylmethane.
  • Any suitable catalyst for the polyurethane formation may be used including tertiary amines such as, for example, triethylenediamine, N-methylmorpholine, N-ethylmorpholine, diethylaminoethanol, N-laurylmorpholine, 1-methyl-4(dimethylaminoethyl)piperazine, 3-methoxy-N,N'- dimethylpropylamine, N,N,N'-trimethylisogropylpropylene- diamine, N,N,N',N'-tetraethylpropylenediamine, dimethylbenzylamine, and the like.
  • tertiary amines such as, for example, triethylenediamine, N-methylmorpholine, N-ethylmorpholine, diethylaminoethanol, N-laurylmorpholine, 1-methyl-4(dimethylaminoethyl)piperazine, 3-methoxy-N,N'- dimethylpropylamine, N
  • Suitable catalysts are, for example, tin compounds such as stannous chloride, tin salts of carboxylic acids, such as dibutyltin di-2-ethyl hexanoate and stannous octoate, as well as other organo metallic compounds such as are disclosed in U.S. Patent No. 2,846,408.
  • a surface-active agent may be employed. Numerous surface-active agents have been found satisfactory. Nonionic surface-active agents are preferred. Of these, the nonionic surface-active agents prepared by the sequential addition of propylene oxide and then ethylene oxide to propylene glycol and the solid or liquid organosilicones have been found particularly desirable. Other surface-active agents which are operative, although not preferred, include polyethylene glycol ethers of long chain alcohols, tertiary amine or alkylolamine salts of long chain alkyl acid sulfate esters, alkylsulfonic esters, and alkylarylsulfonic acids.
  • the flame retardancy of the foam samples was determined by employing the California Bulletin No. 117 flame test.
  • the specifications to pass this test are: after-flame, maximum 10 seconds, average ⁇ 5 seconds; char length, maximum 8 inches, average ⁇ 6 inches.
  • Those foams which passed the average after-flame and char length specifications also passed the maximum after-flame and char length requirements.
  • a reaction vessel equipped with a mechanical stirrer, thermometer, pressure equalized addition funnel, and a reflux condenser was purged with nitrogen and charged with 300 parts ethyl acetate and 100 parts of TDI.
  • the isocyanate content of the solution at this stage was 12.5 percent by weight.
  • the catalyst, TDH, in the amount of 0.4 part was added thereafter. An exotherm developed and reached about 40°C.
  • the reaction mixture was then heated to 50°C and maintained at that temperatuare for 3 hours.
  • the free isocyanate (NCO) content of the reaction mixture decreased to the value shown in Table I
  • the polymerization was then stopped by the deactivation of the TDH catalyst by adding 0.4 parts of benzoyl chloride and stirring the reaction mixture for another 15 minutes at 50°C. Then, while still maintaining the reaction temperature at 50°C, components 1 and 2, as specified in Table I, were added dropwise over a period of 0.5 hour to 1 hour. The reaction was further continued for another 2 hours at which time all the free NCO groups were substantially reacted.
  • the reaction contents were then transferre5 into the indicated polyol while the polyol was being rapidly mixed with a homogenizer. Thereafter, the solvent was removed under reduced pressure and the residue was homogenized to yield a fine particulate dispersion.
  • the viscosity values of the dispersions prepared are shown in Table I.
  • the polymerization was then stopped by the deactivation of the TDH catalyst by adding 0.4 parts of benzoyl chloride and stirring the reaction mixture for another 15 minutes at 50°C. Then, while still maintaining the reaction temperature at 50°C, component 2, as specified in Table II, were added dropwise over a period of 0.5 hour to 1 hour. The reaction was further continued for another 2 hours at which time all the free NCO groups were substantially reacted. The reaction contents were then transferred into the indicated polyol while the polyol was being rapidly mixed with a homogenizer for another hour. Thereafter, the solvent was removed under reduced pressure and the residue was homogenized to yield a fine particulate dispersion. The viscosity values of the dispersions prepared are shown in Table II. All of the polyols in the Examples had a dispersion content of 20 percent except Example 38 which had a 15 percent dispersion content.
  • a reaction vessel equipped as in Examples 1-23 was charged with 300 parts of ethyl acetate and 100 parts of TDI.
  • the indicated amount of component 1 was added with 0.4 parts TDH catalyst.
  • An exotherm developed and reached about 40°C.
  • the reaction mixture was then heated to 50°C and maintained at that temperatuare for 3 hours.
  • the free isocyanate (NCO) content of the reaction mixture decreased to the value shown in Table I
  • the polymerization was then stopped by the deactivation of the TDH catalyst by adding 0.4 parts of benzoy 1 chloride and stirring the reaction mixture for another 15 minutes at 50°C.
  • components 1 and 2, as specified in Table I were added dropwise over a period of 0.5 hour to 1 hour.
  • the reaction was further continued for another 2 hours at which time all the free NCO groups were substantially reacted.
  • the reaction contents were then transferred into the indicated polyol while the polyol was being rapidly mixed with a homogenizer. Thereafter, the solvent was removed under reduced pressure and the residue was homogenized to yield a five particulate dispersion.
  • the viscosity values of the dispersions prepared are shown in Table IV. The solids content of the dispersions was 20 percent.
  • Example 81 was prepared employing an MDI polyisocyanurate polymer prepared in a manner similar to the dispersion of Example 45 with the exception that no monofunctional active hydrogen compounds were reacted with the free NCO groups remaining in the polymer.

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  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
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  • Materials Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Polyurethanes Or Polyureas (AREA)
EP82100059A 1981-01-19 1982-01-07 Verfahren zur Herstellung von mit halogenierten Alkoholen modifizierten Polyisocyanurat-Dispersionen und daraus hergestellte Zusammensetzungen Withdrawn EP0056582A1 (de)

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US06/225,936 US4326043A (en) 1981-01-19 1981-01-19 Process for the preparation of polyisocyanurate dispersions modified with halogenated alcohols and compositions prepared therefrom

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WO2015038825A1 (en) * 2013-09-13 2015-03-19 Dow Global Technologies Llc Polyisocyanate polyaddition polyol manufacturing process using stabilizers
US9840603B2 (en) 2013-09-13 2017-12-12 Dow Global Technologies Llc PIPA based combustion-modified flexible foam

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US4719245A (en) * 1984-03-08 1988-01-12 The Dow Chemical Company Flexible polyisocyanurate-urethane foam
US4814360A (en) * 1986-06-05 1989-03-21 Basf Corporation High resiliency molded foam consisting of the reaction product of a polyisocyanate, a polyoxyalkylene polyether polyol, water and a halogenated monohydric alcohol
DE4015155A1 (de) * 1990-05-11 1991-11-14 Bayer Ag Verfahren zur herstellung von isocyanuratpolyisocyanaten, die nach diesem verfahren enthaltenen verbindungen und ihre verwendung
US5288766A (en) * 1992-02-28 1994-02-22 Basf Corporation Poyurea based dispersions, foams prepared therefrom, and a process for the preparation therein
US6358908B1 (en) * 1995-03-24 2002-03-19 Bayer Corporation Azeotropic compositions of 1,3-dioxolane and hydrocarbons having 5 or 6 carbon atoms and the use thereof in the production of foams
US6515125B1 (en) 2001-03-09 2003-02-04 Bayer Corporation Liquid partially trimerized polyisocyanates based on toluene diisocyanate and diphenylmethane diisocyanate
US20050245629A1 (en) * 2002-07-18 2005-11-03 Grigsby Robert A Jr Catalyst combinations for increasing trimer content in foam
US20040259967A1 (en) * 2003-04-23 2004-12-23 Neill Paul L. Liquid hardness agent for open cell foams
US7553963B2 (en) * 2003-10-29 2009-06-30 Bayer Materialscience Llc Liquid partially trimerized and allophanized polyisocyanates based on toluene diisocyanate and diphenylmethane diisocyanate
US20050101754A1 (en) * 2003-11-12 2005-05-12 Slack William E. Stable liquid, allophanate-modified diphenylmethane diisocyanate trimers, prepolymers thereof, and processes for their preparation
WO2007047661A2 (en) * 2005-10-18 2007-04-26 Stepan Company Prepolymer containing a liquid hardness agent for open cell foams
US20080227878A1 (en) 2007-03-14 2008-09-18 James Garrett Trimer and allophanate modified isocyanates, a process for their production, foams comprising these modified isocyanates, and a process for the production of these foams
CN101307126B (zh) * 2008-07-16 2012-05-30 武汉仕全兴聚氨酯科技股份有限公司 Mdi三聚体固化剂及其制备方法
DE102008043824A1 (de) 2008-11-18 2010-05-20 Performance Chemicals Handels Gmbh Verfahren zur Herstellung von Polyurethan-Polyharnstoff-Beschichtungen
CN105683237B (zh) * 2013-09-13 2019-02-22 陶氏环球技术有限责任公司 含有分散的氨基甲酸酯改性聚异氰脲酸酯的触变多元醇组合物

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US9840603B2 (en) 2013-09-13 2017-12-12 Dow Global Technologies Llc PIPA based combustion-modified flexible foam
US9840602B2 (en) 2013-09-13 2017-12-12 Dow Global Technologies Llc PIPA polyol based conventional flexible foam
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US4326043A (en) 1982-04-20

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