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High-content aqueous polyurethane latex and preparation method thereof

A water-based polyurethane, high-content technology, applied in textiles, papermaking, fiber treatment, etc., can solve the problems of non-applicable textiles such as water pressure resistance, and achieve low production costs, simple and convenient production, and good washability.

Inactive Publication Date: 2009-12-30
郯城县华晨涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Water-based polyurethane emulsions that can be used for textile coatings with a solid content of 40% are also rare. WIT-769 from the British Baxenden company has a solid content of 40%, but it is not suitable for improving the water pressure resistance of textiles.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Raw material weight ratio:

[0037] (A) hydrogenated diphenylmethane diisocyanate 100, (B) sodium salt of aliphatic diaminosulfonic acid (equivalent weight 220) 20, (C) linear bishydroxyalkyl siloxane (molecular weight 1000) 50, (D) Dimer acid polyester diol (molecular weight 2000) 40, (E) 2-methyl-2,4 pentanediol 35, (F) 1,3 cyclohexanediol 25, (G) ethylenediamine 7, (H) fatty alcohol polyoxyethylene ether TO7 is 5, (J) deionized water: 220

[0038] Preparation:

[0039] 1. Prepolymerization reaction: Add (A) hydrogenated diphenylmethane diisocyanate, (C) linear bishydroxyalkyl siloxane (molecular weight 1000), (D) dimer acid polyester diol (molecular weight 2000) to Into the reactor, react at 75-80°C for 3 hours, then add (B) sodium salt of aliphatic diaminosulfonic acid (equivalent 220), (E) 2-methyl-2, 4-pentanediol, (F ) 1,3 cyclohexanediol, continue to react at 75-80°C for 2 hours;

[0040] 2. Chain extension reaction: Add (G) ethylenediamine to the above prep...

Embodiment 2

[0044] Raw material weight ratio: (A) hydrogenated diphenylmethane diisocyanate 110, (B) sodium salt of aliphatic diaminosulfonic acid (equivalent weight 220) 25, (C) linear bishydroxyalkyl siloxane (molecular weight 1000) 50. (D) Dimer acid polyester diol (molecular weight 2000) 50, (E) 2-methyl-2,4 pentanediol 40, (F) 1,3 cyclohexanediol 30, (G) Ethylenediamine 2 and 1,4-butanediol 5, (H) fatty alcohol polyoxyethylene ether TO7 is 8, (J) deionized water 235: the preparation method is the same as in Example 1, and the product content is 55.3%.

[0045] The product of this embodiment has a slightly hard hand feeling due to the large ratio of (A) and (E) in the raw material ratio; ethylenediamine and 1,4-butanediol are selected for chain extension together, and the synergistic effect is good, and the water pressure resistance and wear resistance are good. .

Embodiment 3

[0047] Raw material weight ratio: (A) hydrogenated diphenylmethane diisocyanate 115, (B) aliphatic diaminosulfonic acid sodium salt (equivalent 220) 25, (C) linear bishydroxyalkyl siloxane (molecular weight 2000) 70. (D) Dimer acid polyester diol (molecular weight 2000) 50, (E) 2-methyl-2,4 pentanediol 40, (F) 1,3 cyclohexanediol 35, (G) 1,4-butanediol 7, (H) fatty alcohol polyoxyethylene ether TO7 is 8, (J) deionized water 261: the preparation method is the same as Example 1, and the product content is 55.2%

[0048] Because (A) and (C) are larger in the proportion of raw material components, the product of this embodiment has high water pressure resistance, soft hand feeling and good fastness.

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PUM

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Abstract

The invention discloses high-content aqueous polyurethane latex and a preparation method thereof. (A) hydrogenated diphenylmethane diisocyanate, (B) fatty group diamino sulfonic acid sodium salt, (C) linear bihydroxyalkyl siloxane, (D) dimer acid polyester dibasic alcohol; (E) 2-methyl-2, 4 pentanediol, (F) 1, 3 cyclohexanediol, (G) chain extender, (H) fatty alcohol-polyoxyethylene ether TO7, and (J) deionized water are used for preparing the high-content aqueous polyurethane latex through a prepolymerization reaction, a chain-extending reaction and an emulsion reaction. The invention has the advantages of low production cost, 55% of solids content, good water pressure resistance, fastness, abrasion resistance, favorable washability and aqueous environmental protection.

Description

technical field [0001] The invention relates to a water-based polyurethane emulsion for textile coating and a preparation method thereof, in particular to a high-content water-based polyurethane emulsion with good water pressure resistance and a preparation method. Background technique [0002] With the development of society, people pay more and more attention to environmental protection. Water-based products have no pollution to the environment and no harm to the human body. Therefore, it has become an inevitable trend to replace solvent-based polyurethane with water-based polyurethane. [0003] At present, the solid content of general water-based polyurethane emulsion is between 20-35%. The water-based polyurethane emulsion that can be used for textile coatings has a solid content of 40% and is rare. The WIT-769 of the British Baxenden company has a solid content of 40%, but it is not suitable for improving the water pressure resistance of textiles. Chinese patent CN1718...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/67C08G18/42C08G18/38D06M15/572
Inventor 严欣宁唐丽杨文堂荣星樊丽君刘杰沈德全赵瑞佳
Owner 郯城县华晨涂料有限公司
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