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Adhesive

An adhesive, one-component technology, applied in adhesive types, unsaturated alcohol copolymer adhesives, etc., can solve problems such as non-compliance with environmental protection requirements, personal injury of operators and consumers, air pollution, etc.

Inactive Publication Date: 2002-10-30
白以晟
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0002] At present, the adhesives used at home and abroad for bonding wood and bamboo products such as plywood, laminated boards, and chipboards are mainly composed of urea-formaldehyde resins. Because urea-formaldehyde resins are synthesized by urea and formaldehyde in a certain proportion under certain conditions, the resulting Adhesives always contain unreacted residual formaldehyde. Formaldehyde is a toxic and harmful substance. It seriously causes air pollution and brings personal injury to operators and consumers. Therefore, it does not meet the national environmental protection requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] 1. Add a certain amount of water into the reaction tank and raise the temperature to 80°C, then put a weighed amount of polyvinyl alcohol into the reaction tank while stirring, and raise the temperature to 90°C to fully dissolve the polyvinyl alcohol.

[0018] 2. When the temperature of the dissolved polyvinyl alcohol solution drops to 60°C, gradually add sodium sulfate, castor oil and ethylene oxide condensate, propylene glycol polyoxypropylene polyoxyethylene ether, stir well and then add carboxymethyl Cellulose, and stir well for another ten minutes.

[0019] 3. Add water glass to the above solution, stir well, add borax, and stir well again. At this time, the solution is more viscous, then add a certain amount of water in the above formula, and stir until it is uniform.

[0020] 4. Add sodium hydroxide to the above solution, stir well, then add rosin, and stir thoroughly for half an hour. At this point, the entire synthesis process is complete.

[0021] Fi...

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PUM

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Abstract

An adhesive for plywood, plybamboo, laminated board and flakeboard is prepared from polyvinyl alcohol (1799) (1-10%), sodium sulfate (0.05-0.87%), condensate of castor seed oil and epoxy ethane (EL-40) (0.01-0.56%), carboxymethyl cellulose (0.005-1.0%), propanediol polyoxypropene polyoxyvinether (7010) (0.05-0.9), water glass (0.5-15%), borax (0.001-0.5%), sodium hydroxide (0.1-5%), rosin (0.5-5%) and water (61.17-97.784%). Its advantages are no environmental pollution, low cost and high shear strength.

Description

(1) Technical field [0001] The invention is a one-component adhesive belonging to a macromolecular polymer, which is suitable for bonding wood and bamboo products such as plywood, laminated board, chipped wood and the like. (2) Background technology [0002] At present, the adhesives used at home and abroad for bonding wood and bamboo products such as plywood, laminated boards, and chipboards are mainly composed of urea-formaldehyde resins. Because urea-formaldehyde resins are synthesized by urea and formaldehyde in a certain proportion under certain conditions, the resulting Adhesives always contain unreacted residual formaldehyde. Formaldehyde is a poisonous and harmful substance that seriously causes air pollution and brings personal injury to operators and consumers. Therefore, it does not meet the national requirements for environmental protection. (3) Contents of the invention [0003] In view of the above-mentioned problems in the prior art, the present invention de...

Claims

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Application Information

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IPC IPC(8): C09J129/04
Inventor 白以晟
Owner 白以晟
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