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Preparation method of polyurethane material with waterproof surface

A polyurethane material and silane coupling agent technology, applied in the field of organic polymer materials, can solve the problems of cost reduction, high toxicity of organic fluorine comonomers, high price, etc., and achieve simple and convenient process, easy continuous production, and low cost Effect

Inactive Publication Date: 2011-08-17
温州市登达化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, organic fluorine comonomers are highly toxic and expensive, and the amount of monomer required for copolymerization modification is large, which is not conducive to environmental protection and cost reduction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The mixed gas of carbon difluoride and helium is selected as the working gas, and their flow rates are 0.1 L / min and 4.9 L / min, respectively, and the mixed flow rate is about 5 L / min. Under the conditions of atmospheric pressure plasma discharge frequency of 10 kHz and discharge power of 200 W, the polyurethane material was treated for 45 seconds, and then a layer of KH560 solution was sprayed on the surface immediately. The solvent was ethanol, and the volume ratio of KH560 and solvent was 0.05. The treated polyurethane material was placed in the air for 8 minutes and then dried at 60 oC to obtain a surface waterproof polyurethane material. The water contact angle was 142 degrees.

Embodiment 2

[0029] The mixed gas of carbon trifluoride and helium is selected as the working gas, and their flow rates are 0.08 L / min and 8 L / min, respectively, and the flow rate after mixing is about 8.08 L / min. Under the conditions of atmospheric pressure plasma discharge frequency of 10 kHz and discharge power of 200 W, the polyurethane material was treated for 45 seconds, and then a layer of KH560 solution was sprayed on the surface immediately. The solvent was ethanol, and the volume ratio of KH560 and solvent was 0.05. The treated polyurethane material was placed in the air for 10 minutes and then dried at 60 oC to obtain a surface waterproof polyurethane material. The water contact angle is 140 degrees.

Embodiment 3

[0031] The mixed gas of carbon tetrafluoride and argon is selected as the working gas, and their flow rates are 0.1 L / min and 0.1 L / min, respectively, and the mixed flow rate is about 0.2 L / min. Under the conditions of atmospheric pressure plasma discharge frequency 1 kHz and discharge power 50 W, the polyurethane material was treated for 60 seconds, and then a layer of KH560 solution was sprayed on the surface immediately, the solvent was acetone, and the volume ratio of KH560 and solvent was 1, and then The treated polyurethane material was placed in the air for 2 minutes and then dried at 80 oC to obtain a surface waterproof polyurethane material. The water contact angle is 135 degrees.

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PUM

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Abstract

The invention discloses a preparation method of a polyurethane material with a waterproof surface, belonging to the field of organic high molecular materials. The preparation method comprises the following steps of: (1) selecting a mixed gas of fluorohydrocarbon and an inert gas as a working gas; (2) regulating working gas flow, and carrying out surface treatment on the polyurethane material by utilizing normal pressure polyurethane; (3) spraying a silicane coupling agent solution on the polyurethane material surface; and (4) placing the polyurethane material in the air for certain period of time, and drying to prepare the polyurethane material with the waterproof surface. The method adopted by the invention has the advantages of low cost, stable and lasting surface waterproof property, simple and convenient process, easiness to realize continuous production and the like.

Description

technical field [0001] The invention belongs to the field of organic polymer materials, and specifically refers to a preparation method of a surface waterproof polyurethane material. Background technique [0002] The full name of polyurethane is polyurethane, which is a general term for macromolecular compounds containing repeated carbamate groups on the main chain. It is formed by addition polymerization of organic diisocyanate or polyisocyanate and dihydroxy or polyhydroxy compound. By changing the type and composition of raw materials, the form and performance of polyurethane products can be greatly changed, including soft, semi-rigid and rigid foam plastics, elastomers, paint coatings, adhesives, sealants, synthetic leather coating resins, Elastic fibers, etc., are widely used. For environmental protection and safety considerations, countries are competing to develop water-based polyurethane materials. The usual preparation method of waterborne polyurethane is to intr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/12C08L75/04
Inventor 蔡福泉万灵书田志胜
Owner 温州市登达化工有限公司