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Aqueous formaldehyde-free glass wool binder and preparation method thereof

A binder and zero-formaldehyde technology, applied in the direction of acidic copolymer binder, binder type, non-polymer binder additives, etc., to achieve the effect of improving the ability of bubble formation and improving the effect of heat and sound insulation

Active Publication Date: 2014-02-12
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005]Patents ZL 1962517B, ZL 1837280B and ZL 100463926 have proposed formaldehyde-free glass wool adhesives whose main components are acrylic resin and polyol as the base material. To solve the problems of formaldehyde release, cost and water resistance, but there is no report on the method of improving the bubble formation ability of the adhesive in the curing stage of the heat and sound insulation performance of glass wool products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Add 14 parts of trimethylolpropane, 1 part of sodium hypophosphite and 1 part of oxalic acid in parts by weight to 7 parts of deionized water, and fully stir and mix;

[0029] (2) Add 1 part of γ-glycidyloxypropyltrimethoxysilane to the above mixture, and continue to stir until γ-glycidyloxypropyltrimethoxysilane is fully hydrolyzed;

[0030] (3) Then add 75.6 parts of an aqueous solution of polyacrylic acid oligomer or copolymer (Mn=800~1000, COOH mass percentage content 18%, mass concentration 30%) to the mixed solution obtained in step (2), fully Stir to mix;

[0031] (4) Add 0.2 parts of concentrated sulfuric acid with a mass concentration of 98% to the mixture obtained in step (3), adjust the pH value to 1-3, and stir to obtain the required water-based zero-formaldehyde glass wool adhesive , The solid content of the obtained adhesive is 40%.

[0032] The obtained water-based zero-formaldehyde glass wool adhesive is applied to the glass wool as follows:

[00...

Embodiment 2

[0035] (1) Add 16.5 parts of trimethylolpropane, 1 part of sodium dihydrogen phosphate and 0.75 parts of oxalic acid in parts by weight to 15.8 parts of deionized water, and fully stir and mix;

[0036] (2) Add 1.5 parts of γ-glycidyl etheroxypropyl trimethoxysilane to the above mixture, and continue to stir until the γ-glycidyl etheroxypropyl trimethoxysilane is fully hydrolyzed;

[0037] (3) Then add 63 parts of an aqueous solution of polyacrylic acid oligomer or copolymer (Mn=800~1000, COOH mass percentage content 18%, mass concentration 30%) to the mixed solution obtained in step (2), fully Stir to mix;

[0038] (4) Add 0.2 parts of p-toluenesulfonic acid to the mixed solution obtained in step (3), adjust the pH value to 1-3, and stir to obtain the required water-based zero-formaldehyde glass wool adhesive. The solid content of the agent is 40%.

[0039] The obtained water-based zero-formaldehyde glass wool adhesive is applied to the glass wool as follows:

[0040] Afte...

Embodiment 3

[0042] (1) 16 parts by weight of trimethylolpropane, 2 parts of sodium tripolyphosphate and 0.1 part of oxalic acid are added to 42 parts of deionized water, fully stirred and mixed;

[0043] (2) Add 1 part of γ-glycidyloxypropyltrimethoxysilane to the above mixture, and continue to stir until γ-glycidyloxypropyltrimethoxysilane is fully hydrolyzed;

[0044] (3) Then add 35 parts of an aqueous solution of polyacrylic acid oligomer or copolymer (Mn=5000, COOH mass percentage content 30%, mass concentration 50%) into the mixed liquid obtained in step (2), and stir and mix thoroughly ;

[0045] (4) Add 1 part of polyphosphoric acid to the mixture obtained in step (3), adjust the pH value to 1-3, and stir to obtain the required water-based zero-formaldehyde glass wool adhesive. The obtained adhesive The solid content is 35%.

[0046] The obtained water-based zero-formaldehyde glass wool adhesive is applied to the glass wool as follows:

[0047] After the glass is spun into fibe...

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Abstract

The invention discloses an aqueous formaldehyde-free glass wool binder and a preparation method of the binder. The solid content of the binder is 35-40%, the curing temperature is 150-250 DEG C, and the curing time is 5 minutes. The preparation method of the invention comprises the following steps (by mass parts): adding 10-16.5 parts of polyols, 0.5-2 parts of catalyst containing phosphorus and 0.1-2 parts of foaming agent into 4-42 parts of water, stirring and mixing; adding 0.5-1.5 parts of silicane coupling agent, 35-80 parts of polyacrylic acid oligomer or polyacrylic acid copolymer and 0.1-1 part of strong acid into the above liquid mixture in order, and regulating pH to 1-3. The preparation method of the invention does not release free formaldehyde or organic solvent, and has the advantages of being healthy and environmentally friendly. In addition, the preparation method of the invention efficiently improves the capacity of the binder for producing bubbles in the curing process and the heat insulation and sound insulation effects of glass wool products by adding oxalic acid or oxalate as the foaming agent.

Description

technical field [0001] The invention relates to the field of preparation of a water-based zero-formaldehyde glass wool adhesive, in particular to a water-based zero-formaldehyde glass wool adhesive and a preparation method thereof. Background technique [0002] Phenolic resin (MF) is widely used in glass wool adhesives, because it has a sufficiently low viscosity before curing, so that the glass fibers are fully wetted by the adhesive and can be well bonded together. The glass fiber is wrapped in the polymer, so that the cured glass wool product has good flexibility and rigidity. When the product is compressed for storage and transportation, it can return to its original size when used. [0003] The traditional glass wool binder is phenolic resin containing formaldehyde, which releases free formaldehyde during the production and use of glass wool, causing health and environmental problems. With the growing concern for the above issues, and existing and proposed regulations...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J133/02C09J11/06D04H1/645
Inventor 瞿金清苏铭健
Owner SOUTH CHINA UNIV OF TECH
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