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Special high-temperature resistant waterproof air and moisture permeable resin for coating printing and preparation method thereof

A waterproof, breathable and high temperature resistant technology, applied in textiles, papermaking, fiber processing, etc., can solve the problems of easy precipitation, poor mechanical properties, etc., and achieve the effect of good reactivity, good compatibility and soft paint film

Inactive Publication Date: 2013-08-28
宜兴市华夏化工材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former has limited materials and is not suitable for film-like coatings. It will be hard after adding fillers, and fillers and polyurethane itself are only physical effects, easy to precipitate, and have poor mechanical properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 180 parts by weight of polypropylene glycol and polyethylene glycol with a molecular weight of 2000, the mass ratio of the two is 1.5:1, 40 parts by weight of HDI and IPDI are a mixture of 1:1 by weight, 50 parts by weight of toluene and two A mixture of methyl acetamide with a weight ratio of 1:1 is added dropwise with 0.1% organic bismuth by the total weight of the above mixture, and 10 parts by weight of 1,4-butanediol chain extender is added, and the above materials are mixed and reacted at 65°C for 1 hour to obtain Prepolymer, then add the dihydroxy-heptaphenyl cage silsesquioxane of 7% by weight of the prepolymer to react for 4h, then add 0.5 parts by weight of methanol terminator, 2 parts by weight of UV-327 stabilizer, use toluene Adjust the material to a solid content of 30% with a solvent with a weight ratio of 1:1 to ethyl acetate, the viscosity of the material is 60000cps / 25°C, and the molecular weight is 50000g / mol. Stir evenly and let it cool down.

[002...

Embodiment 2

[0031] A mixture of 180 parts by weight of polypropylene glycol and polyethylene glycol with a molecular weight of 3000 and a mass ratio of 1.5:1. 44 parts by weight of HDI and IPDI in a weight ratio of 1:1. 50 parts by weight of toluene and dimethylacetamide 1:1 mixture, add 0.1% organic bismuth by weight of the above mixture, 1 part by weight of 1,4 butanediol chain extender, mix the above materials and react at 65°C for 1h , to obtain a prepolymer, then add 10% of the weight of the prepolymer dihydroxy-heptaphenyl cage silsesquioxane, react at 65°C for 4h, add 0.5 parts by weight of methanol terminator, 2 parts by weight of UV-531 to stabilize agent, with toluene and ethyl acetate at a weight ratio of 1:1 to adjust the solid content of the material to 30%, the viscosity of the material to 80000cps / 25°C, and the molecular weight to 60000g / mol. Stir evenly and let it cool down.

[0032] The material prepared in Example 2 was coated according to the method of Example 1, and t...

Embodiment 3

[0034] 220 parts by weight of molecular weight are polypropylene glycol and polyethylene glycol of 3000, the mass ratio of the two is 1:3, 43 parts by weight of HDI and IPDI mixture of 1:2 by weight, 50 parts by weight of toluene and diethylene glycol A 1:1 mixture of methyl acetamide, add 0.1% organic bismuth by weight of the above mixture dropwise, 5 parts by weight of neopentyl glycol chain extender, mix the above materials and react at 65°C for 1 hour to obtain a prepolymer, and then add Dihydroxy-heptaphenyl cage silsesquioxane with 10% weight of the prepolymer was reacted at 65° C. for 5 h, and 0.5 parts by weight of methanol terminator and 2 parts by weight of UV-510 stabilizer were added in a weight ratio of 1: 1 Toluene and ethyl acetate are adjusted to a material with a solid content of 30%, a viscosity of 95,000 cps / 25°C, and a molecular weight of 80,000 g / mol. Stir evenly and let it cool down.

[0035] The material prepared in Example 3 was coated according to th...

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Abstract

The invention discloses special high-temperature resistant waterproof air and moisture permeable resin for coating printing and a preparation method thereof. The resin is prepared by the following steps of: obtaining a prepolymer through a reaction between polyether polyol and diisocyanate; and modifying the prepolymer by use of polyhedral oligomeric silsesquioxane to obtain the resin, wherein the average molecular weight of the resin is 50000-150000g / mol, the viscosity is 60000-100000cps / 25 DEG C, and the solid content of the resin is 30-55%. In the polyurethane resin prepared by the method disclosed by the invention, the moisture permeability can reach 7500g / m<2>.24H, and the water pressure resistance is greater than 10000mmH2O; moreover, the polyurethane resin has the processing characteristic of tolerating a temperature of 200-230 DEG C for continuous 30S during coating printing; and the resin has highly-permeable coating and soft and smooth handfeel, and is washable and very suitable for the direct coating and coating printing technology of fabric coating processing.

Description

technical field [0001] The invention belongs to the technical field of polyurethane preparation technology, and in particular relates to a preparation method for improving the resistance of polyurethane by modifying polyurethane with siloxane. Background technique [0002] Polyurethane was used as a highly elastic rubber during World War II, and later as a waterproof material, coated on clothing fabrics to prevent wind and rain. However, because the early polyurethane material is a continuous thick film, it is not breathable, it is stuffy to wear, and sweat cannot penetrate the outside, so it is very uncomfortable, and it has not been widely used as a clothing fabric. In the 1980s, the Gore company in the United States launched a waterproof and moisture-permeable film clothing fabric through a series of research. In 1984, the US patent US4532316 proposed a waterproof and moisture-permeable polyurethane clothing material. Since then, the development of polyurethane as a wate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/32C08G18/12D06M15/564
Inventor 史星照史建科赵慧峰
Owner 宜兴市华夏化工材料有限公司
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