Adhesive

A technology of adhesives and initiators, applied in the direction of adhesives, adhesive types, hydrocarbon copolymer adhesives, etc., can solve the problems of poor aging resistance, limited use range, low bonding strength, etc., and achieve aging resistance Strong, wide operating range, high bond strength effect

Inactive Publication Date: 2003-09-10
姚建
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of adhesive is used in the occasions of interior decoration such as wood bonding, and it also has its own shortcomings.
1. The bonding strength is lower than that of vinyl acetate emulsion, so the scope of use is limited
2. Due to the addition of other types of resins in the formula, the aging resistance is poor
3. A variety of solvents need to be added in the manufacturing process, and some solvents are harmful to the construction workers and other indoor personnel.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A 45% solids copolymer adhesive solution with 70 parts vinyl acetate, 15 parts acrylic acid, and 15 parts methyl methacrylate was prepared.

[0014] In the reactor with temperature agent, reflux condenser, and stirring, first add 70 parts of vinyl acetate, 15 parts of acrylic acid, 15 parts of methyl methacrylate and 0.005 parts of ammonium persulfate, and heat the reactor to about 74 ° C , to react, when the conversion rate of the monomer reaches 30%, add 60 parts of methanol and 0.3 part of ammonium persulfate, and react under reflux for 12 hours. After the reaction was completed, the temperature was lowered to 30° C., and 62 parts of ethyl acetate were added. The reaction product was a 45% terpolymer composition solution adhesive.

Embodiment 2

[0016] A copolymer solution adhesive with 80 parts of vinyl acetate, 10 parts of acrylic acid, and 10 parts of butyl acrylate was prepared with a solid content of 40%.

[0017] In a reactor, first add 80 parts of vinyl acetate, 10 parts of acrylic acid, 10 parts of butyl acrylate, and 0.03 parts of ammonium persulfate, and then heat the reactor to about 74 ° C for insulation reaction. When the monomer conversion rate reaches 50%, add 150 parts of ethanol and 0.2 part of ammonium persulfate, and react under reflux for 10 hours.

[0018] The reaction product is a terpolymer composition solution adhesive with a solid content of 40%.

Embodiment 3

[0020] A copolymer solution adhesive having a solid content of 35% and having 50 parts of vinyl acetate, 10 parts of acrylic acid, 30 parts of butyl acrylate and 10 parts of methyl methacrylate was prepared.

[0021] Add a mixture of 50 parts of vinyl acetate, 10 parts of acrylic acid, 30 parts of butyl acrylate, and 10 parts of methyl methacrylate into the reactor, and at the same time add 0.02 parts of azobisisobutyrocyanide to heat the reactor Carry out heat preservation reaction at about 78°C. When the monomer conversion reaches 50%, add 60 parts of ethanol and 0.2 parts of azobisisobutyronitrile, react under reflux for 10 hours, cool down to 30°C, and then add 226 parts of ethanol. The reaction product was a solution adhesive of a tetrapolymeric composition with a solid content of 35%.

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Abstract

The present invention relates to two-step solution polymerization process of preparing copolymer adhesive solution. In the first step, high-concentratino unsaturated monomer is polymerized into polymer with relatively high molecular weight. In the second step, unsaturated monomer in relatively low concentration is polymerized into polymer with relatively low molecular weight, and the initiator concentration is controlled in different reaction stages to obtain wide molecular weight distribution of the polymer. The polymer is used in compounding adhesive for adhering timber, high-density board, fireproof board and other decorative material.

Description

technical field [0001] The invention relates to an adhesive, which is used for bonding materials such as wood and fireproof boards, and belongs to the technical field of adhesives. Background technique [0002] With the expansion of the scope of decoration occasions, the complexity of the construction process and the requirements of construction speed and many other aspects, solvent-based adhesives are more and more widely used, especially various types represented by neoprene and sbs thermoplastic styrene-butadiene rubber. This kind of adhesive formula products is growing at a very fast speed. This kind of adhesive has good water resistance, high initial adhesion, simple construction method and fast speed. Due to the short evaporation time of the solvent, the adhesive force can quickly meet the requirements of the next process, so it is very popular among construction workers. However, this type of adhesive is used in the occasions of interior decoration such as wood bondi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J125/04C09J133/00
Inventor 姚建
Owner 姚建
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