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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] Example 1

[0036] Raw material weight ratio:

[0037] (A) Hydrogenated diphenylmethane diisocyanate 100, (B) Aliphatic diamine sulfonate sodium salt (equivalent 220) 20, (C) Linear bishydroxyalkylsiloxane (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) ethylene diamine 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 dihydroxyalkylsiloxane (molecular weight 1000), (D) dimer acid polyester diol (molecular weight 2000) Into the reaction kettle, react at 75-80°C for 3 hours, and then add (B) aliphatic diamine sulfonate sodium salt (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) ethylene diamine to the above prepo...

Example Embodiment

[0043] Example 2

[0044] Weight ratio of raw materials: (A) hydrogenated diphenylmethane diisocyanate 110, (B) aliphatic diamine sulfonate sodium salt (equivalent 220) 25, (C) linear dihydroxyalkylsiloxane (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 example is slightly harder due to the larger ratio of raw materials (A) and (E); ethylenediamine and 1,4-butanediol are selected for chain extension, which has good synergistic effect, and has good water pressure resistance and abrasion resistance. .

Example Embodiment

[0046] Example 3

[0047] Raw material weight ratio: (A) hydrogenated diphenylmethane diisocyanate 115, (B) aliphatic diamine sulfonate sodium salt (equivalent 220) 25, (C) linear dihydroxyalkylsiloxane (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 in Example 1, and the product content is 55.2%

[0048] The product of this embodiment has a relatively large ratio of raw material components (A) and (C), and the product 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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