JP2000325877A - Formation of sealing layer, coaching layer and lining layer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for forming a sealing layer, a coaching layer and a lining layer on wall and floor parts to uniformly coat even on a vertical face or an inclined face and operate easily in skill without giving minus effects to application properties other than the coating layer or the lining layer. SOLUTION: The sealing layer, the coaching layer and the lining layer on the wall and floor parts are formed using a two-component polyurethane elastomer by spray operation. The highly reactive polyurethane having 5-60 seconds working time is applied on the base material to be coated using a mixing/ spraying device by a high-pressure method.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a roof,
Bridge, tunnel, parking pool, underground garage, terrace,
The present invention relates to a method for producing sealing layers, coating layers and lining layers of balconies, industrial sites (eg, manufacturing halls and warehouses), sales spaces, display spaces, hospitals, schools, kitchens, canteens and factories.

[0002]

2. Description of the Prior Art The profile required for this type of surface coating in terms of application properties is relatively extensive. The surface coating is particularly suitable for compression, scratching,
It must withstand impact and shock, be stable against chemicals and the weather, be able to attenuate footsteps, and withstand high loads. Further, the surface coating is flat and non-slip,
In some cases, it must have a decorative surface and must also have crack-filling properties and good heat resistance. In this case, in practice, two components (2) coated on the substrate to be coated by a conventional mixing / spraying device in a spraying method are used.
Liquid-type) polyurethane elastomers have proven to be good.

[0003] Such two-component polyurethane elastomers generally comprise a resin component (A) based on a polyether alcohol and a polyester alcohol and / or an amine derivative and a curing agent component (A) based on a polyisocyanate prepolymer. B). Both components are usually mixed on site, in a static mixer,
Then, it is sprayed with a usual spray gun. According to the prior art, mixing and spraying of the polyurethane elastomer for spraying is carried out by a low-pressure method, but high-pressure air is required for spraying (see, for example, EP-A 799 648).

[0004] In this case, there is a disadvantage that the spray loss is large and an extremely strong spray mist is generated, thus making the coating surface non-uniform. Furthermore, according to the prior art, the processing time of the polyurethane polymer compounds used is usually 1
5-30 minutes. This is especially the case for roof structures (eg, chimneys, vaults, roof windows, etc.), transitions to walls or vertical or sloping coverings such as those found on all types of joints, especially negative. Act on. Due to the relatively long curing time, the coating is non-uniform at the critical points described above, thus causing very small cracks and other surface defects to appear in the coating.

[0005]

The object of the present invention was therefore to provide a process for producing sealing layers, coating layers and wall and floor lining layers using a two-component polyurethane elastomer in a spraying operation. hand,
It does not have the above-mentioned disadvantages of the prior art, can perform uniform coating on vertical or inclined surfaces, can be easily operated technically, and has other application properties of coating layer or lining layer. The aim is to develop a method of manufacturing that has no negative impact.

[0006]

According to the present invention, a highly reactive polyurethane elastomer having a processing time of 5 to 60 seconds is to be coated in a high-pressure method using a mixing and spraying device. The problem is solved by coating the substrate.

That is, surprisingly, the combination of a highly reactive polyurethane system and a high pressure process provides a very uniform coated surface with good application properties without the use of complicated mixing and spraying equipment. It turns out that it can. In the case of the process according to the invention, very reactive polyurethane elastomers with a processing time of 5-60 seconds (preferably 10-30 seconds) are used. In this case, the polyurethane elastomer comprises a known polyurethane reaction component, that is, a resin component (A) and a curing agent component (B).

When selecting the resin component (A), all series of compound types are considered. It is preferred to use high molecular weight polyether alcohols and polyester alcohols having a molecular weight of 300-8000 daltons mixed with low molecular weight chain extenders comprising diols and / or polyols having a molecular weight of 50-300 daltons. Polyether alcohol and / or polyester alcohol
Preference is given to polyol polymers, for example polyalkylene glycols, aliphatic or aromatic polyesters, polycaprolactone, polycarbonates, macromonomers, telechels or epoxy resins and mixtures thereof. As polyether alcohols it is preferred to use polyethylene glycols based on ethylene oxide and propylene oxide, polyalkylene glycols in the form of polypropylene glycols or mixtures of polyalkylene glycols, and as polyester alcohols polyols based on recycled materials ( For example, castor oil and its derivatives) are preferably used.

The low molecular weight chain extending component includes, for example,
1,2-ethanediol or ethylene glycol,
1,2-propanediol or 1,2-propylene glycol, 1,3-propanediol or 1,3-propylene glycol, 1,4-butanediol or 1,4-butylene glycol, 1,6-hexanediol or 1 , 6-Hexamethylene glycol, 2-methyl-1,3-propanediol (trade name: Arco C
chemical MPDiol Glycol®), 2,2-dimethyl-1,3-propanediol or neopentyl glycol, 1,4-bis (hydroxymethyl) cyclohexane or cyclohexanedimethanol, 1,2,3-propane Triol or glycerol, 2-hydroxymethyl-2-methyl-1,
3-propanol or trimethylolethane, 2-ethyl-2-hydroxymethyl-1,3-propanediol or trimethylolethane, 2-ethyl-2-hydroxymethyl-1,3-propanediol or trimethylolpropane, 2, 2-bis (hydroxymethyl)
-1,3-Propanediol or pentrit can be used. Butanediol, dipropylene glycol, trimethylolpropane and glycerin may be particularly preferred. According to a preferred embodiment, the mixture of polyether alcohol and polyester alcohol is
In addition, it contains aromatic, cycloaliphatic or aliphatic diamines.

As the aromatic diamine, for example, ter
t. Butyltoluylenediamine (TBTDA), dimethylthiotoluylenediamine (Ethancure® 300), trimethylene glycol di-p-aminobenzoate (Polacure® 740),
1,2-bis (aminophenylthio) ethane (Cyan
acure (registered trademark)), 2,4-diaminotoluol, orthophenylenediamine, metaphenylenediamine, paraphenylenediamine, 4,4'-diaminodiphenylmethane, 1,4-diaminobenzol, 4,4 '
-Diaminodiphenyl, 4,4'-diaminodiphenylether, 3,3'-dichloro-4,4'-diaminodiphenylmethane (MOCA) or mixtures thereof can be used.

Of the series of cyclic aromatic diamines, 1,4
-Diaminocyclohexane, 4,4'-dicyclohexylaminoethane, piperazine and N-aminoethylpiperazine are preferred. As the aliphatic diamine, ethylenediamine, 1,12-dodecanediamine,
2-methyl-1,5-pentanediamine, 2,2,5-
Trimethyl-1,6-hexanediamine, diethylenetriamine, triethylenetetraamine, tetraethylenepentamine, polyamidoamine, hydrazine, hydrazine adipate or N- (2-aminoethyl) -2-
Use aminoethanol. Diethyl toluylenediamine (DETDA, Ethacure® 10)
0), isophoronediamine and hexamethylenediamine are preferably used. As the resin component (A), the above aromatic, cycloaliphatic and aliphatic diamines can be used alone instead of the polyether alcohol and the polyester alcohol.

Another alternative material has a molecular weight of 200-
Mixtures of 5000 dalton long-chain polyetheramines with the aforementioned low-molecular-weight chain extenders consisting of diols and / or polyols can also be used. Long-chain polyetheramines are, in particular, difunctional and trifunctional polyoxyalkylenes or polyoxyalkyleneamines having terminal amine groups, based on polypropylene glycol and / or polyethylene glycol, D, ED , EDR, M and T series, Jeffamine® (huntsman)
Is commercially available.

The hardener component (B) is based on a difunctional or polyfunctional polyether alcohol and an aliphatic or aromatic polyisocyanate, and may be an aliphatic or aromatic, which may contain a polymer component and a monomer component. Preference is given to using Group III polyisocyanates or polyisocyanate prepolymers. The polyisocyanate prepolymer is 5-3% by weight of the prepolymer.
Preferably, it contains 5% by weight of NCO.

As suitable aliphatic polyisocyanates,
For example, 1,6-diisocyanatohexane (HD
I), 1-isocyanato-5-isocyanatomethyl-3,3,5-trimethylcyclohexane (IPD
I), bis (4-isocyanatocyclohexyl) methane _(H 12 MDI), 1,3-bis (1-isocyanato-1-methylethyl) benzene (m-TMXDI)
Alternatively, industrial isomer mixtures of the respective aliphatic polyisocyanates can be used. Suitable aromatic polyisocyanates include, for example, 2,4-diisocyanatotoluol (T
DI), bis (4-isocyanatocyclohexyl) methane (MDI), optionally higher homologs thereof (polymeric MDI) or technical isomer mixtures of the respective aromatic polyisocyanates.

[0015] In addition to the resin component and the curing agent component, the polyurethane elastomer may further contain common supplementary additives such as a catalyst (eg, triethylenediamine, dibutyltin dilaurate, DABCO), a degassing agent, a drying agent (eg, , Zeolite), fire retardants (eg, diphenylcresyl phosphate, aluminum hydroxide), color pastes (especially inorganic pigment-based pastes), U
V protectants, antioxidants, fungicides and plasticizers (eg,
Sulfonic acid esters, phthalates).

In the high-pressure process, spraying the highly reactive polyurethane elastomer at a pressure of 100-200 bar, in particular 110-140 bar, is the essence of the present invention. In this case, a predetermined, preferably 10: 1-1:
A polyurethane reaction component comprising a resin component and a curing agent component and a supplemental additive in a mixing ratio of 10 parts by weight is continuously pumped from a storage container to a mixing / spraying device. According to a preferred embodiment, the storage containers for the resin component and the hardener component are installed in a transport vehicle in order to ensure as simple a technical operability as possible and optimum flexibility.
30-60 to improve the processability of PU elastomer
Preference is given to using the reaction components at a temperature of 40 ° C., in particular 40-50 ° C.

When carrying out the process according to the invention, the combination of a multi-component high-pressure spray gun with a high-pressure adapter and a static mixer with a wide-slit spray nozzle proves to be particularly advantageous as a mixing and spraying device. are doing. A rotatable switchgear can integrate both reaction components,
Alternatively, it is preferable to configure the spray gun so that the duct can be re-separated and the duct can be washed with the washing liquid by the third rotation position. In a static mixer with a high-pressure adapter and a wide-slit spray nozzle, i.e. a so-called storage mixer, the two reactants are mixed intensively, with an opening of 30-60 DEG without the use of supplementary mixed air. Spray as flat flow at corner.

In this case, high pressure air is not required for spraying,
Therefore, the fact that spray losses, strong spray mist formation and uneven coating surfaces due to harmful air bubbles are avoided,
It is considered particularly advantageous. Furthermore, in the case of the above-mentioned system, a very easy to operate and lightweight spray gun can be used, in which case no mechanical stirrer with complicated packing and bearings is required. Furthermore, the corresponding combination of conventional low-pressure static mixers with high-pressure adapters and multi-component high-pressure spray guns makes it possible to take full advantage of the advantages of high-pressure spray technology (airless technology).

According to the method according to the invention, a layer thickness of 0.5-
A 10 mm sealing layer, coating layer and lining layer can be applied to the substrate with a coverage of 100-250 m ² / h, in which case a very uniform coated surface is obtained, even on vertical or inclined surfaces. The present invention will be described in detail with reference to the following examples.

[0020]

Examples Example 1 The following reaction components Resin component (A)-high molecular weight polyester alcohol:-535 parts by weight of castor oil-14 parts by weight of hydrogenated castor oil (Tixotrol ST)-polyether alcohol of high molecular weight:-EO / 220 parts by weight of trifunctional polypropylene glycol (Desmophen 4012R) based on PO / TMP (MG450)-Plasticizer:-160 parts by weight of liquid resin of hydrocarbon (Novarez L700) modified with phenol-160 parts by weight of dipropylene glycol part - zeolite desiccant (Silosiv A3) 30 parts by weight - mineral pigment-based color paste _{(TiO 2 / Fe 2 O 3} ) 30 parts by weight - catalyst: & dibutyltin laurate 2 parts by weight triethylenediamine 2 parts by weight

The curing agent component (B) -polyurethane elastomer consisting of 1000 parts by weight of diphenylmethane diisocyanate (MDI) is mixed at a predetermined mixing ratio of 10: 5 parts by weight from a storage container to a mixing and spraying device at 40 ° C. Pumped continuously. In this case, the mixing / spraying device is a multi-component high-pressure spray gun (Grac).
o model 208-044), a high pressure adapter and a wide slit spray nozzle (Spraying Sys).
Stats) (Staticix Structural Series ME-5). Mixing the above-mentioned polyurethane elastomer with a processing time of 30 seconds
With a spray device, at a pressure of 125 bar, 3 m
The concrete base material was coated with a layer thickness of m and a covering capacity of 150 m ² / h, and a sealing layer of a parking pool was constructed. In this case, a uniform layer thickness with the following properties was also obtained on the vertical and inclined surfaces: Tensile strength: 14 N / mm ² Elongation: 90% Shore-A-hardness: 90

Example 2 The following reaction components: resin component (A)-high molecular weight polyester alcohol:-352 parts by weight of castor oil-14 parts by weight of hydrogenated castor oil (Tixotrol ST)-polyether alcohol of high molecular weight:-EO / PO 250 parts by weight of trifunctional polypropylene glycol (Desmophen 4012R) based on TMP / TMP (MG450) -Plasticizer: -160 parts by weight of liquid resin of hydrocarbon (Novarez L700) modified with phenol -Fireproofing agent: -Diphenylcre Shiruhosufeto (Disflamoll DPK) 150 parts by weight - dipropylene glycol 10 parts by weight - zeolite desiccant (Silosiv A3) 30 parts by weight - mineral pigment-based color paste _(TiO 2 / _Fe 2 _{O 3} 30 parts by weight - Catalyst: & dibutyltin laurate 2 parts by weight triethylenediamine 2 parts by weight

Curing agent component (B) -Polyurethane elastomer comprising 1000 parts by weight of diphenylmethane diisocyanate (MDI) was added to 10: 4,5
At a predetermined mixing ratio of parts by weight, the mixture was continuously pumped from the storage container to the same mixing and spraying device as in Example 1 at 45 ° C. A polyurethane elastomer having a processing time of 30 seconds is coated on a polyurethane foam-based substrate by means of the mixing and spraying device described above at a pressure of 130 bar and a layer thickness of 3 mm and a coatability of 200 m ² / h. And sealed the roof. In this case, a uniform layer thickness with the following properties was also obtained on the vertical and inclined surfaces: Tensile strength: 12 N / mm ² Elongation: 110% Shore-A-hardness: 85

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 4D075 AA01 AA71 AA84 CA02 CA04 CA05 CA32 DA06 DC01 DC05 EA27 EB35 EB37 EB38 EB56 4H017 AA03 AA31 AB03 AC19 AD06 AE03 4J038 DB061 DB131 DG051 DG111 PC02 P03 PC02

Claims (15)

[Claims] 1. A two-component polyurethane in a spraying operation.
In a process for producing sealing layers, coating layers and wall and floor lining layers using an elastomer, a highly reactive polyurethane elastomer having a processing time of 5 to 60 seconds is mixed in a high pressure method by a mixing and spraying device. Coating the substrate to be coated. 2. The method according to claim 1, wherein the processing time of the polyurethane elastomer is 10-30 seconds. 3. 100-200 bar, especially 110-
3. The method according to claim 1, wherein the method operates at a pressure of 140 bar. 4. A continuous pumping of a polyurethane elastomer comprising a resin component (A) and a curing agent component (B) in a predetermined mixing ratio of 10: 1-1: 10 parts by weight from a storage container to a mixing / spraying device. The method according to claim 1, wherein the feeding is performed. 5. The method according to claim 4, wherein a storage container for the resin component and the curing agent component is installed in a truck. 6. The method according to claim 1, wherein the resin component and the curing agent component are 30-60
6. The process according to claim 1, wherein the process is used at a temperature of 40.degree. 7. The method according to claim 1, wherein an aromatic diamine, a cycloaliphatic diamine and an aliphatic diamine are used as the resin component. 8. A high molecular weight polyether alcohol and a polyester alcohol (molecular weight: 30) as a resin component.
0-8000 daltons) and a low molecular weight chain extender (molecular weight 50-
7. The process according to claim 1, wherein a mixture of an aromatic diamine, a cycloaliphatic diamine and an aliphatic diamine is used. 9. A resin component having a molecular weight of 200 to 500.
0 Dalton long chain ether amine, diol and / or
7. The method according to claim 1, wherein a mixture with a low molecular weight chain-extending component comprising a polyol is used. 10. The method according to claim 1, wherein an aliphatic polyisocyanate or an aromatic polyisocyanate is used as a curing agent component. 11. The method according to claim 10, wherein the polyisocyanate prepolymer comprises 5-35% by weight of NCO with respect to the prepolymer. 12. The resin component and the curing agent component further comprise:
Claims 1 to 1 characterized in that it comprises usual supplementary additives, for example catalysts, degassing agents, drying agents, fire retardants, color pastes, UV protection agents, antioxidants, fungicides and plasticizers.
A method according to any one of the preceding claims. 13. Layer thickness 0.5-10 mm, preferably 1
Sealing layer of -6 mm, characterized by construction in the coating layer and the base material lining layer coated ability 100-250m ² / h, The method according to any one of claims 1 to 12. 14. The mixing and spraying device according to claim 1, wherein a combination of a multi-component high-pressure spray gun, a high-pressure adapter and a static mixer having a wide-slit spray nozzle is used. The method according to any of the above. 15. A polyurethane elastomer comprising 30-
The method according to claim 14, wherein the spraying is performed as a flat flow having an opening angle of 60 °.