SU654664A1 - Adhesive - Google Patents

Description

i

The invention relates to the manufacture of rubber-resin adhesives used for bonding materials in various areas of the national economy and in everyday life.

Known adhesive containing butadiene-acrylonitrile rubber, urethane rubber, vinyl chloride-vinyl acetate copolymer, rosin, coumarone resin, resin, zinc oxide, captax and solution; tel.

However, such an adhesive is recommended only for bonding synthetic leatherette materials.

Closest to the proposed technical essence and the achieved effect glue, including butadiene nitrile rubber, chlorinated polyvinyl chloride resin, zinc oxide, L-greg.-butylphenol-formaldehyde resin and solvent-methylene chloride | 2.

The known glue is intended for fastening polyvinyl chloride to wood materials. The disadvantages of this glue are the limited area of the materials to be glued, the limited shelf life in the primary packaging (no more than 2 months), insufficient resistance of the glue joint (loss of glue joint strength

after water it is equal to 20%), the frost resistance of the glue is low (the loss of strength of the glue seam located at -20 ° C is 15%), toxicity (in the glue recipe uses toxic solvent-methylene chloride, the maximum permissible concentration of / m).

The purpose of the invention is the creation of glue with the expansion of the field of application, an increase in water resistance, frost resistance, shelf life and reduction of toxicity of glue.

This is achieved by the fact that the glue containing nitrile-butadiene rubber, chlorinated polyvinyl chloride resin, p-tert. butylphenol formaldehyde resin and solvent, additionally contains a copolymer of butyl ether of methacrylic acid and methacrylic acid when the content of the latter in the copolymer is 3.9-4.7 weight. %, and as a solvent - ethyl acetate in the following ratio of components, weight. h:

Butadiene Nitrile Rubber

brand SKN-40 100

. Butylphenol formaldehyde resin60-120

Chlorinated polyvinyl chloride resin 20-60

Copolymer of methacrylic acid and methacrylic acid butyl ether 10-30

Ethyl acetate 690-820

Example. On laboratory rolls and for 5 minutes, a rubber block weighing 0.4 kg is flared, removed in strips and loaded into a 5-liter mixer with a stirrer having two Z-blades, 0.2 kg of ethyl acetate is added, stirred for 30 minutes, swollen rubber contributes 0.4 kg of ethyl acetate. The contents of the mixer are mixed until the rubber is partially dissolved, 0.4 kg of ethyl acetate is poured in, stirred for 10 minutes, and l-greg is loaded. butyl phenol forms an aldehyde resin, mixing until completely dissolved. In the pasture pour the next eration of 0.4 kg of ethyl acetate. mix the contents for 10 minutes, load chlorinated polyvinyl chloride resin and mix until dissolved. Then, 0.4 kg of ethyl acetate is loaded into the mixer, stirred for 10 minutes, and a copolymer of methacrylic acid butyl ester and methacrylic acid is added while stirring until it is dissolved. The remaining ethyl acetate is added and the blender contents are mixed for 30 minutes. About the end of the process of obtaining adhesives judged by the absence in the mass of insoluble lumps of rubber or resins.

The resulting adhesive is tested for adhesive strength, water resistance, frost resistance, shelf life in aluminum primary packaging.

The compositions of the proposed glue are given in table. 1, and the test results - in table. 2

Table 1

From the table. 2 results show that the proposed glue possesses waterproofing (iter proc.Table 2 bridges of glue seam iodine by the action of water is absent -0.0%); the glue has a large (i) o; -: shelf life in any primary package (more than 12 months), frost hardy (loss of strength of the glue line of glue located at -20 ° C for 300 hours, absent - 0.0%); has a wide range of bonded materials, increased adhesion strength (strength of glue seam on samples nz vnnlplast and wood by 1.3-2.0 kgf / cm-more than the prototype). The maximum allowable concentration of ethyl acetate is 200 mg / M whereas for methylene chloride, 50 mg / m).

The technology of glue preparation does not require any additional costs and can be carried out on the equipment of existing industries.

The proposed adhesive can be used in the performance of design and repair work in various areas of the national economy, including in everyday life.

Claims (2)

Invention Formula Glue containing butadiene nitrile rubber, p-greg.buttle phenol forms an aldehyde resin, a chlorinated polyvinyl chloride resin and a solvent, characterized in that, in order to expand the surface: roe, increased water resistance, cold resistance, shelf life and reduce toxicity, resistance the quality of the solvent is ethyl acetate, and additionally a copolymer of methacryl butyl ester, 1 amino acid and methacrylic acid with a content of the latter in the copolymer of 3.9-4.7 weight. % with the following 1, I eat the ratio of ingredients weight. h: Butadiene nitrile rubber100 / g-7re7 butylphenolform aldehyde resin 60-120 Chlorinated polychloride resin 20-60 Copolymer of butyl ester of metacrplic acid and methacrylic acid of 10-30 Ethyl Acetate690-820 Sources of information taken into account in the examination 1. USSR author's certificate To 440396, cl. From 09J 3/12, 1972. 2. USSR author's certificate No. 212516, cl. From 09J 3/12, 1966.