Environment-friendly formaldehyde-free building glue and preparation method thereof

A technology of construction glue and formaldehyde, applied in adhesive types, amide/imide polymer adhesives, adhesive additives, etc., can solve the problems of low cost and no non-polluting alternative materials, and achieve low production costs , Strong adhesion, high compressive strength

Inactive Publication Date: 2014-04-02
栾晓健
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low cost and special performance of polyvinyl formal glue, it is still used at present, and there is no good non-polluting alternative material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Example 1: 50 parts of polyvinyl alcohol solution, 3 parts of polyacrylamide, 0.2 part of hydrochloric acid solution, 3 parts of urea, 0.5 part of sodium hydroxide, 0.1 part of preservative.

Embodiment 2

[0009] Example 2: 60 parts of polyvinyl alcohol solution, 5 parts of polyacrylamide, 0.5 parts of hydrochloric acid solution, 5 parts of urea, 2 parts of sodium hydroxide, 0.5 parts of preservative.

[0010] The preparation method is as follows:

[0011] Add water to a 1,000-liter reactor, heat to 80°C, start the mixer, and then slowly add polyvinyl alcohol and heat to 90°C-95°C to completely dissolve the polyvinyl alcohol. Allow the polyvinyl alcohol solution to cool to 75-85°C, add the hydrochloric acid solution in a trickle mode under continued stirring, stir for 30 minutes, then add polyacrylamide, sodium hydroxide, and preservatives for condensation reaction, the time is controlled at 60 minutes about. After lowering the temperature and adjusting the pH value, use urea for amination treatment, adjust the pH value to neutral, and then lower the temperature to 45-50°C for discharging.

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PUM

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Abstract

The present invention relates to a glue, in particular relates to a health, environment-friendly formaldehyde-free building glue. The building glue is characterized by comprising the following components in parts by weight: 50-60 parts of polyvinyl alcohol solution, 3-5 parts of polyacrylamide, 0.2-0.5 parts of hydrochloric acid solution, 3-5 parts of urea, 0.5-2 parts of sodium hydroxide, 0.1-0.5 parts of a preservative, and the balance being water. The preparation technology is simple, the production cost is low, and the formaldehyde-free building glue is improved on the basis of a polyvinyl formal glue, so that the formaldehyde-free building glue has advantages of safety, innocuity, good initial adhesion, good operationality, high bonding force, high compressive strength, and high heat resistance.

Description

Technical field [0001] The invention relates to a glue, in particular to a healthy, environmentally friendly and formaldehyde-free construction glue. Background technique [0002] The common building glue on the market now is polyvinyl formal glue, which is a colorless or slightly yellow viscous liquid. It is made from polyvinyl alcohol and formaldehyde in an acid medium through polycondensation reaction, and then amination. Got it. The preparation process contains unreacted formaldehyde. It has the characteristics of non-combustibility, low price and convenient use. It can be used alone, as book binding glue, glue, building decoration can be used to paste wallpaper and plastic floor; the most used is to use it and cement mortar to paste tiles. Although polyvinyl formal glue has been widely used, it contains a lot of formaldehyde. It is included in the list of eliminated building materials by the Ministry of Construction, and its use in home decoration is prohibited. However,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J129/04C09J133/26C09J11/04C09J11/06
Inventor 栾晓健
Owner 栾晓健
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