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Environment friendly aldehyde-free odourless building glue

A construction glue and odor-cleaning technology, applied in the direction of adhesives, adhesive types, non-polymer adhesive additives, etc., can solve problems such as unsatisfactory use, and achieve easy construction, enhanced frost resistance and storage, and transparency good consistency

Inactive Publication Date: 2010-05-12
童国松
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there are some deficiencies to some extent, and the specific use is not ideal

Method used

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Embodiment Construction

[0007] This specific embodiment adopts the following technical solutions: polyvinyl alcohol 60%-80%, phosphoric acid 6%-10%, urea 2%-5%, sodium hydroxide, sodium polyacrylate 0.5%-1%, preservative 0.1% Prepared by making up to 100 with water.

[0008] Add 600 kg of water to the reaction kettle or glue tank, and then start stirring and heating. When it is heated to 40-50 degrees, add 60 kg of polyvinyl alcohol, raise the temperature to 95-95 ° C, keep stirring for half an hour, and make the polyvinyl alcohol completely dissolved.

[0009] In the second step, the temperature is lowered to about 90°C, and 6 kg of phosphoric acid (analytical pure) is added, stirred for 5 minutes, then 5 kg of urea is added, and stirred for about 1 hour.

[0010] In the third step, add 100 kg of cold water to reduce the temperature in the reactor to 60-70°C, slowly add 10% sodium hydroxide solution, and adjust the pH to 7-8.

[0011] In the fourth step, 100 kg of 1% sodium polyacrylate solution i...

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Abstract

The invention discloses an environmental friendly aldehyde-free odourless building glue which relates to a building glue. The building glue is prepared from 60%-80% of polyving akohol, 65%-80% of phosphoric acid, 2%-5% of urea, sodium hydroxide, 0.5%-1% of sodium polyacrylate, 0.1% of antiseptic and water up to 100%. The polyving akohol is esterified with the phosphoric acid under the catalysis of the urea for the first time, wherein the phosphoric acid is an inorganic polyprotic acid and can esterify with the hydroxyl of the polyving akohol, and the added urea can improve the freezing resistance and the storage performance of the glue. The building glue has no color or no odor, excellent transparent consistence, long storage time, no gelation at low temperature and strong adhesion stress; and the building glue can be used by mixing with white cement, double-flying powder, chalk powder and the like and has the advantages of easy construction, no powder falling or no skin curling.

Description

Technical field: [0001] The invention relates to a construction glue, in particular to an environment-friendly, formaldehyde-free and odor-free construction glue. Background technique: [0002] The building glue that existing building engineering and interior decoration are used mainly is polyvinyl acetal glue (as 107,801 glue) and acrylamide glue. Polyvinyl acetal construction glue is mainly formed by the reaction of polyvinyl alcohol and formaldehyde (or glyoxal) under an acidic catalyst. It is characterized by high bonding strength and good frost resistance, but the residual amount of glue aldehydes is high. The irritating smell is strong, which seriously affects the physical and mental health of production users. Acrylamide glue is mainly made of polyvinyl alcohol and acrylamide as the main raw materials and copolymerized under the action of an initiator. The produced glue is colorless and transparent, has good construction performance and high cost performance, but acr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J129/04C09J11/04C09J11/06C09J9/00
Inventor 童国松
Owner 童国松
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