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Aldehyde free building adhesive and preparing method thereof

An adhesive and construction technology, used in interior decoration and decoration projects, casting adhesives, and construction engineering fields, can solve problems such as unsuitable construction engineering, decoration engineering, personal injury to production operators and users, poisonous and harmful, etc.

Inactive Publication Date: 2004-06-02
白以晟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most of the adhesives used in construction engineering, interior decoration and casting use polyvinyl formal glue, commonly known as 107 glue, which is an acetal glue made from polyvinyl alcohol and formaldehyde through acetal reaction, so the adhesive made always has Residual free formaldehyde, formaldehyde is a poisonous and harmful substance, it will cause serious air pollution, bring great personal injury to production operators and users, and the adhesive applied for application number 02116588.2 does not contain formaldehyde but it It is mainly suitable for the bonding of wood and bamboo products such as plywood, laminated board, etc., not suitable for construction engineering, decoration engineering and casting

Method used

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Examples

Experimental program
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Embodiment Construction

[0019] Take the amount respectively according to the ratio of above-mentioned 1,2,3 embodiment, its synthesis process is as follows:

[0020] 1. Add a certain amount of water into the reaction tank and raise the temperature to 80°C, then put the weighed polyvinyl alcohol into the reaction tank with stirring and raise the temperature to 90°C until the polyvinyl alcohol is completely dissolved.

[0021] 2. After the polyvinyl alcohol is completely dissolved, stop heating and continue stirring for 10 minutes, then gradually add sodium sulfate, hydroxyethyl cellulose, propylene glycol polyoxypropylene polyvinyl ether (7010) and stir thoroughly.

[0022] 3. Slowly add water glass to the above solution, stir while adding, stir for 10 minutes after adding, then add borax, add borax in two times, add 3 / 4 of the amount that should be added for the first time, and fully Stir, then add the remaining 1 / 4 and stir well again.

[0023] 4. After adding borax, the glue becomes thicker...

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PUM

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Abstract

The present invention is one kind of aldehyde-free building adhesive suitable for in building engineering, indoor decoration and fitment engineering and casting. The aldehyde-free building adhesive consists of PVA 2-12 wt%, sodium sulfate 0.001-0.68 wt%, hydroxyethyl cellulose 0.002-0.08 wt%, propylene glycol polyoxytrimethylene polyvinylether 0.001-0.8 wt%, water glass 0.5-6.6 wt%, borax 0.001-1 wt%, urea 0.5-4.5 wt%, sodium benzoate 0.01-1 wt% and water 73.34-96.985 wt%. The present invention features no toxic matter contained, no air pollution produced and no damage to the producer and user, and is used as substitute of polyvinyl formal for wide application.

Description

(1) Technical field: [0001] The invention is a single-component adhesive belonging to macromolecular polymers, which is mainly used for construction engineering, interior decoration engineering and casting adhesives. (two) background technology: [0002] Chinese patent No. 87101061 discloses a polyvinyl formal casting adhesive, which uses polyvinyl alcohol as the main raw material, adds formaldehyde to produce polyvinyl formal through acetal reaction, and then mixes it with hydroxymethyl cellulose to form an adhesive . [0003] The adhesive applied for by Chinese patent application number 02116588.2 adopts polyvinyl alcohol (1799), sodium sulfate castor oil and ethylene oxide condensate (EL-40), propylene glycol polyoxypropylene polyvinyl ether (7010), and hydroxymethyl fiber Adhesive made by mixing plain, water glass (40Be°), borax, sodium hydroxide, rosin, and water. [0004] At present, most of the adhesives used in construction engineering, interior decoration and cast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J129/04
Inventor 白以晟
Owner 白以晟
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