JPS61281175A - Adhesive for building material - Google Patents

Abstract

PURPOSE:To titled adhesive suitable for bonding a mortar structure to a plaster board or the plasterboard to wall paper, having improved bond strength, con sisting of a hydroxyl-containing liquid diene polymer, a polyisocyanate com pound, and mortar. CONSTITUTION:(A) A hydroxyl group-containing diene polymer (e.g., butadiene homopolymer, etc., containing preferably 0.3-0.5meq/g hydroxyl group content) is blended with (B) a polyisocyanate compound (most preferably tolyene diiso cyanate, etc.), (C) mortar, and, if necessary, a reinforcing agent (most preferably aniline polyol compound), etc., and kneaded, to give the aimed adhesive for building materials such as preferably mortar structure, plasterboard or wall paper. A molar ratio of OH in the component A to NCO in the component B is preferably 0.5-1.2. EFFECT:Time of drying process is shortened and propagation of mold is pre vented.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an adhesive for construction materials, and more particularly, to an adhesive suitable for construction materials suitable for bonding mortar structures and gypsum boards, or gypsum boards and wallpaper. Regarding adhesives for materials.

[Prior Art and Problems to be Solved by the Invention] The interior work of buildings is usually done by pasting a gypsum board onto a mortar structure using an adhesive, and then pasting wallpaper onto the gypsum board using an adhesive. This is done by wearing clothes. Conventionally, a composition consisting of a vinyl acetate resin emulsion and mortar has been known as an adhesive for bonding this mortar structure and a gypsum board, and a vinyl acetate resin emulsion has been used as an adhesive for bonding a gypsum board and wallpaper. Are known.

All of these adhesives contain a large amount of water, so while they are preferable for handling and application, there is the problem that the drying process takes a long time, resulting in a significant delay in the construction period. Ta. Furthermore, the adhesive strength was not fully satisfactory. In addition, since the mortar structure also contains a large amount of water, there was also the drawback that this water permeated the gypsum board and caused the proliferation of wallpaper Kl.

The present invention solves the above-mentioned conventional drawbacks, and provides an adhesive for construction materials that shortens the drying process time and has excellent adhesive strength.

[Means for solving problems]

That is, the present invention relates to a hydroxyl group-containing diene polymer.

The present invention provides an adhesive for construction materials comprising a polyisocyanate compound and mortar.

Here, the hydroxyl group-containing liquid diene polymer has a hydroxyl group in the molecule, preferably at the end of the molecule, and has a number average molecular weight of 300.
25,000, preferably 500 to 10,000. These liquid diene polymers include diene polymers having 4 to 12 carbon atoms, diene copolymers, and copolymers of these diene monomers with α-olefinic addition polymerizable monomers having 2 to 22 carbon atoms. There is.

The hydroxyl content is 0.1-10 rneq/g, preferably 0.3-5, Q meqlg. Specifically, butadiene homopolymer, imprene homopolymer, butadiene-styrene copolymer, butadiene-isoprene copolymer, butadiene-acrylonitrile copolymer,
Examples include butadiene-2-ethylhexyl acrylate copolymer and butadiene-n-octadecyl acrylate copolymer. These liquid diene polymers can be produced, for example, by subjecting a conjugated diene monomer to a heating reaction in a liquid reaction medium in the presence of hydrogen peroxide.

In addition, the polyisocyanate compound is an organic compound having two or more isocyanate groups in one molecule, and is an inocyanate compound that is reactive with the active hydrogen-containing functional group of the hydroxyl group-containing liquid diene polymer and the polyol compound described later. It has a group. Examples of polyisocyanate compounds include the usual aromatic, aliphatic and cycloaliphatic ones, such as tolylene diincyanate, hexamethylene diincyanate, diphenylmethane diisocyanate (MDI), liquid modified diphenylmethane diincyanate, Polymethylene polyphenyl isocyanate, xylylene diisocyanate, cyclohexyl diisocyanate, cyclohexane phenylene diisocyanate, naphthalene-1,5-diincyanate, isopropylbenzene-2,4-diisocyanate, polypropylene glycol and tolylene diisocyanate addition reaction product, etc., among others, aD Preferred examples include modified diphenylmethane diisocyanate, i-modified diphenylmethane diisocyanate, and tolylene diisocyanate.

There is no particular restriction on the blending ratio of the hydroxyl group-containing liquid diene polymer and the polyincyanate compound, but usually the hydroxyl M (OH) of the hydroxyl group-containing liquid diene polymer and the incyanate group (NOO) of the polyincyanate compound The molar ratio of Neo/□H=0.2-25, preferably O-5
~12. If the molar ratio is less than 0.2, curing becomes difficult, and even if the molar ratio exceeds 25, the effect of the reinforcing agent described below cannot be obtained commensurately with the molar ratio.

The adhesive of the present invention has cement as the above two components.

It is made by mixing mortar consisting of sand and water. Here, the blending amount of the mortar is the diene polymer 10
50 to 1500 parts by weight per 0 parts by weight is suitable, preferably 100 to 1000 parts by weight.

In addition to the above-mentioned components, the adhesive of the present invention may contain the following polyol compounds and polyamine compounds as reinforcing agents if necessary, and various additives may be added as necessary. Various compounds can be used, including primary polyols,
You can use either secondary polyol or tertiary polyol.

Specifically, for example, 1,2-propylene glycol.

Diglobylene glycol, 1,2-butanediol 1
．． 3-butanediol, 2.3-butanediol.

1,2-bentanediol, 2,3-bentanediol, 2,5-hexanediol, 2,4-hexanediol, 2-ethyl-1,3-hexanediol.

Cyclohexanediol, glycerin, N,N-bis-2-hydroxypropylaniline, N,N'-
bishydroxyisopropyl-2-methylbiperazine,
Included are low molecular weight polyols containing a hydroxyl group bonded to at least one secondary carbon, such as propylene oxide adducts of bisphenols.

Further, as polyols, ethylene glycol, 1,3-propylene glycol, and 1,4-butanediol do not contain a hydroxyl group bonded to a secondary carbon.

1,5-hentanediol, 1,6-hexanediol, etc. can also be used. Diols are usually used as polyols (triols and tetraols may also be used, and their molecular weights range from 50 to 500. Among these, aniline polyol compounds are particularly preferred in the present invention). It is preferable because it has excellent mechanical effect.

Here, the aniline polyol compound is represented by the general formula (wherein R represents a lower alkyl group and n represents 2 or 3). Specifically, for example, N,N-bis-2-hydroxyethylaniline represented by the formula.

N,N-bis-2-hydroxypropylaniline represented by the formula can be mentioned as a suitable one.

There are no particular restrictions on the polyamine compound, and diamine,
Either triamine or tetramine may be used. Furthermore, 1
class polyamine, secondary polyamine.

Any tertiary polyamine can be used.

Examples of polyamine compounds include aliphatic amines such as hexamethylene diamine, 3,3'-dimethyl 4,4'
- Alicyclic amines such as diaminodicyclohexylmethane;
Aromatic amines such as 4,4'-diaminodiphenyl;
2.4.6- ) Tetramines such as (dimethylaminomethyl)phenol and the like can be mentioned.

The blending amount of the polyol and polyamine is 1 to 1000 parts by weight, preferably 3 to 200 parts by weight, per 100 parts by weight of the hydroxyl group-containing liquid diene polymer.
Parts by weight are appropriate.

In addition, mica, graphite, vermiculite, calcium carbonate, slate powder, etc. are added as fillers, and plasticizers such as dioctyl phthalate are added as viscosity modifiers, as well as aromatic and naphthene-based products.

Process oils such as paraffin-based oils are added, and alkylphenol resins, terpene resins, terpenephenol resins, xylene formaldehyde resins, rosins, hydrogenated rosins, coumaron resins, aliphatic and Tackifying resins such as aromatic petroleum resins can also be added. In addition, curing accelerators such as dibutyltin dilaurate, stannous octoate, and volier diamine can also be added. Furthermore, an anti-aging agent can be added to improve weather resistance, and a silicon compound or the like can be added as an antifoaming agent.

Also, straight asphalt, prone asphalt, and semi-prone asphalt as required.

Petroleum asphalts such as propane (solvent) desoluble asphalt, bituminous materials such as petroleum pitch, coal tar, coal pitch, etc. may also be added. The amount of the bituminous substance blended is 10 to 1 part by weight per 100 parts by weight of the hydroxyl group-containing liquid diene polymer.
000 parts by weight, preferably 50 to 300 parts by weight.

The adhesive for construction materials of the present invention is produced by blending and kneading the above raw materials. Normally, a predetermined amount of raw materials other than polyisocyanate and mortar are first blended, and then mixed. The crosstalk condition is the type of raw material.

It may be determined depending on the blending ratio, etc., but usually 10 to 12
It is carried out at 0'C, preferably 20-80C, for 1-360 minutes, preferably 5-180 minutes. A polyincyanate compound is then added to this blend and the mixture is heated at 10-100°C.
, preferably at 20-80°C for 1-360 minutes, preferably 2-180 minutes, and finally add a predetermined amount of mortar and stir at 0-50°C, preferably 15-40°C for 1-30 minutes, preferably 2 By stirring for ~20 minutes, the adhesive for construction materials of the present invention is obtained.

The adhesive for construction materials of the present invention thus obtained is liquid and has high adhesive properties. This material is cured into a cured body by an appropriate curing treatment as described below. .

An example of the method of using the adhesive for construction materials of the present invention as described above will be explained with reference to the drawings.

First, the adhesive 2 for construction materials of the present invention is attached to the mortar structure 1 by an appropriate means, and then the gypsum board 3 is attached. Next, the adhesive 4 for construction materials of the present invention may be further applied to the surface of the gypsum board 3 by coating or spraying, and then the wallpaper 5 may be attached.

The conditions for curing treatment vary depending on the type of raw material, amount used, etc., and also depending on the type of construction material, but usually 0~
0.5 at a temperature of 150°C, preferably 20-120°C
-168 hours, preferably 1-22 hours.

In addition, the thickness to which the adhesive for construction materials of the present invention is applied or sprayed varies depending on the type of construction material, but is usually 1 to 100 ml.
The length is preferably about 5 to 90 mm.

Further, the adhesive for construction materials of the present invention is not limited to the above-mentioned usage example, and for example, it is also possible to replace either one of the adhesives 4 and 5 with another adhesive.

〔Effect of the invention〕

According to the adhesive for building materials of the present invention, it is possible to shorten the time required for a drying process when performing construction such as interior construction of a building. Therefore, the construction period can be significantly shortened compared to the conventional method.

Furthermore, the adhesive for construction materials of the present invention has superior adhesive strength compared to conventional adhesives.

Moreover, according to the adhesive of the present invention, it is possible to isolate wallpaper from base materials such as mortar.

It also has the effect of preventing mold from forming due to moisture from the underlying material.

Therefore, the adhesive for building materials of the present invention can be effectively used in the construction field of houses and the like.

〔Example〕

Next, the present invention will be explained in detail with reference to Examples.

Example 1 Hydroxyl group-containing liquid diene polymer (terminal hydroxyl group-containing liquid polybutadiene, manufactured by Idemitsu Petrochemical Co., Ltd.).

1'-R-45HTJ, number average molecular weight 2800. A hydroxyl group content of 0.79 rneqlg) and dioctyl phthalate as a plasticizer were blended in the predetermined proportions shown in Table 1, and kneaded at 80°C for 120 minutes. Next, a predetermined amount of 4,4'-diphenylmethane diincyanate as a polyisocyanate compound shown in Table 1 was added thereto, and the mixture was heated at 20°C.
Stir for 120 minutes, and finally add mortar (cement 7S).
150 parts by weight of sand and 45 parts by weight of water) were added to the mixture and stirred for 5 minutes at 20° C. to obtain a liquid adhesive.

Using this adhesive, drying time and adhesive strength were evaluated by the following method. The results are shown in Table 1.

First, the drying time evaluation method will be explained with reference to FIG. 1.
25. with adhesive 2 5 wings thick. A thick gypsum board 3 was attached, and the drying time was measured at a temperature of 25° C. and a humidity of 60%.

Moreover, the adhesive strength was measured by a tensile shear test according to JIS A-1613.

Example 2 Using adhesives obtained in the same manner as in Example 1 at the compounding ratios shown in Table 1, the drying time, adhesive strength, and presence or absence of mold generation were evaluated by the following methods.

The results are shown in Table 1.

First, the method for evaluating the drying time will be explained with reference to FIG. 1. The 85. 25℃ thick gypsum board 3 with thick adhesive 2
After drying for 24 hours, wallpaper 5 laminated with polypropylene was applied using adhesive 4 with a thickness of 80μ obtained as described above, and dried at a temperature of 25° C. and a humidity of 60%. The time was measured.

Furthermore, after 4 weeks of pasting the wallpaper, the presence or absence of mold on the wallpaper 5 was observed.

In addition, the adhesive strength is JIS K-6854K! : Measured by Le 18 o' beer test.

Example 3 In Example 1, a predetermined amount of the aniline polyol compound shown in Table 1 was added to the hydroxyl group-containing liquid diene polymer and the plasticizer, and the amount of the polyisocyanate compound was changed to the amount shown in Table 1. The same procedure as in Example 1 was carried out except for the changes.

The results are shown in Table 1.

Example 4 In Example 2, the adhesive obtained in Example 3 was used as adhesive 2, and the adhesive obtained in the same manner as in Example 2 was used as adhesive 4 at the compounding ratio shown in Table 1. The same procedure as in Example 2 was carried out except for the following. The results are shown in Table 1.

Comparative Example 1 A water-based adhesive consisting of 65 parts by weight of a vinyl acetate resin emulsion and 35 parts by weight of mortar (the same as that used in Example 1) was used as an adhesive for adhering the mortar structure and the gypsum board. Except for this, the same procedure as in Example 1 was carried out.

The results are shown in Table 1.

Comparative Example 2 The vinyl acetate resin emulsion adhesive was used as the adhesive 4 used for sampling with the inspection paper, and the water-based adhesive used in Comparative Example 1 was used as the adhesive 4. It was carried out in the same manner as in Example 2. The results are shown in Table 1.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing one example of a method of using the adhesive for construction materials of the present invention. 1... Mortar structure, 2... Adhesive for construction materials 3.
... Cerakoku board, 4... Adhesive for construction materials 5...
Wallpaper patent applicant Idemitsu Petrochemical Co., Ltd. Figure 1

Claims (2)

[Claims] (1) An adhesive for construction materials comprising a hydroxyl group-containing liquid diene polymer, a polyisocyanate compound, and mortar. (2) The adhesive according to claim 1, wherein the building material is a mortar structure, gypsum board, or wallpaper.