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Self-extinction waterborne polyurethane as well as preparation method and application thereof

A water-based polyurethane and self-extinction technology, applied in the field of water-based polyurethane, can solve the problems of high transportation cost and construction cost, complex production process, low solid content, etc., to avoid increased brittleness of the coating film, high solid content, and low gloss Effect

Active Publication Date: 2022-07-12
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

"CN 107200823 A double-crosslinked water-based polyurethane self-dulling resin and its preparation method", "CN 112608440 A self-dulled water-based polyurethane and its preparation method" and "CN111944111A A water-based self-dulled polyurethane dispersion and its preparation method and its composition” discloses three kinds of water-based self-dulling polyurethanes, all of which realize the self-dulling effect by adjusting the raw material formula of water-based polyurethanes, but because they all need to use a large amount of organic solvents in the production process, not only the production process is complicated, but also Not environmentally friendly, not safe
In addition, most of the self-dulling water-based polyurethane emulsions currently on the market have a solid content of about 35%, which is low, resulting in high transportation and construction costs

Method used

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  • Self-extinction waterborne polyurethane as well as preparation method and application thereof
  • Self-extinction waterborne polyurethane as well as preparation method and application thereof
  • Self-extinction waterborne polyurethane as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A kind of self-extinction water-based polyurethane, its preparation method comprises the following steps:

[0054] 1) with the polytetrahydrofuran ether diol 2000 of 100g and the water-soluble chain extender PPS of 1.44g (the sodium sulfamate aqueous solution of solid content 90%, the number-average molecular weight of sodium sulfamate is 1000g / mol~2000g / mol) place temperature is 90 ℃, under the condition that vacuum degree is 0.09MPa to carry out vacuum dehydration treatment, then dehydration treated polytetrahydrofuran ether diol 2000, the organic bismuth catalyst of 0.35g (T12 of Air Chemical Products Co., Ltd.) , 3.55g of 2,2-dimethylolpropionic acid and the dehydrated water-soluble chain extender PPS were mixed uniformly, then 55.5g of dicyclohexylmethane diisocyanate was added, and the reaction was carried out at 95°C for 2h to obtain an isocyanate-terminated addition product;

[0055] 2) Add 3.55g of 1,4-butanediol to the isocyanate-terminated addition product,...

Embodiment 2

[0059] A kind of self-extinction water-based polyurethane, its preparation method comprises the following steps:

[0060] 1) with the polytetrahydrofuran ether diol 2000 of 100g and the water-soluble chain extender PPS of 1.08g (the sodium sulfamate aqueous solution of solid content 90%, the number-average molecular weight of sodium sulfamate is 1000g / mol~2000g / mol) place temperature is 90 ℃, under the condition that vacuum degree is 0.09MPa to carry out vacuum dehydration treatment, then the organic bismuth catalyst (T12 of Air Chemical Products Co., Ltd.) of dehydration-treated polytetrahydrofuran ether diol 2000, 0.25g , 3.02g of 2,2-dimethylolpropionic acid and the dehydrated water-soluble chain extender PPS were mixed uniformly, then 51.25g of dicyclohexylmethane diisocyanate was added, and the reaction was carried out at 95°C for 2h to obtain an isocyanate-terminated addition product;

[0061] 2) 2.89g of 1,4-butanediol was added to the isocyanate-terminated addition p...

Embodiment 3

[0065] A kind of self-extinction water-based polyurethane, its preparation method comprises the following steps:

[0066] 1) with the polytetrahydrofuran ether diol 2000 of 100g and the water-soluble chain extender PPS of 1.3g (the sodium sulfamate aqueous solution of solid content 90%, the number-average molecular weight of sodium sulfamate is 1000g / mol~2000g / mol) place temperature is 90 ℃, under the condition that vacuum degree is 0.09MPa to carry out vacuum dehydration treatment, then the organic bismuth catalyst (T12 of Air Chemical Products Co., Ltd.) of polytetrahydrofuran ether diol 2000, 0.22g of dehydration treatment , 3.02g of 2,2-dimethylolpropionic acid and dehydrated water-soluble chain extender PPS were mixed uniformly, then 43.5g of isophorone diisocyanate was added, and the reaction was carried out at 90°C for 2h to obtain isocyanate-terminated addition product;

[0067] 2) Add 3.02 g of 1,4-butanediol to the isocyanate-terminated addition product, react at 9...

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Abstract

The invention discloses self-extinction waterborne polyurethane as well as a preparation method and application thereof. The preparation method of the self-extinction waterborne polyurethane comprises the following steps: 1) uniformly mixing polymeric diol, a catalyst, a carboxylate chain extender and a water-soluble chain extender PPS, then adding diisocyanate, and carrying out an addition reaction to obtain an isocyanate-terminated addition product; 2) adding polyol into the isocyanate-terminated addition product, carrying out an addition reaction, adding a neutralizer, and carrying out a neutralization reaction to obtain a waterborne polyurethane prepolymer; 3) carrying out a chain extension reaction to obtain a waterborne polyurethane emulsion; and 4) carrying out a post chain extension reaction to obtain the self-extinction waterborne polyurethane. The self-matting waterborne polyurethane does not need to be added with any matting powder and is high in solid content and good in storage stability, a paint film obtained through drying and film forming is low in surface glossiness, good in blackness and natural and attractive, and the self-matting waterborne polyurethane is simple in preparation process, environmentally friendly, safe and suitable for large-scale production and application.

Description

technical field [0001] The invention relates to the technical field of waterborne polyurethane, in particular to a self-extinguishing waterborne polyurethane and a preparation method and application thereof. Background technique [0002] In recent years, the popularity of leather products with matte surfaces and natural aesthetics has also led to more and more attention to matte waterborne polyurethanes with low gloss. At present, the matting effect of water-based polyurethane is usually given by adding a matting agent such as silica into the aqueous polyurethane dispersion. However, due to the poor compatibility of the matting agent in the water-based polyurethane system, the water-based polyurethane will appear. Problems such as the deterioration of emulsion stability and the inability of the coating film to resist friction make it difficult to meet the needs of practical applications. [0003] Self-matting waterborne polyurethane does not need to add any matting agent, m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/34C08G18/32C08G18/08C08G18/12C08G18/75D06N3/14
CPCC08G18/6666C08G18/4854C08G18/348C08G18/3206C08G18/0833C08G18/12C08G18/758C08G18/755D06N3/147D06N3/146D06N2209/0846D06N2211/28C08G18/3855C08G18/3228Y02P70/62
Inventor 黄洪郑志杰司徒粤谭卉文
Owner SOUTH CHINA UNIV OF TECH
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