Method for improving surface tension and recoatability of organosilicone synthetic leather coating

A silicone synthetic leather and surface tension technology, applied in textiles and papermaking, can solve the problems of poor recoatability, difficult wetting and spreading, poor adhesion between the coating and the substrate, etc., to achieve low energy consumption, improve The effect of surface energy and improved recoatability

Inactive Publication Date: 2019-05-07
SICHUAN UNIV
View PDF3 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, despite the many advantages of silicone materials, the surface energy of silicone synthetic leather coatings is low, and the adhesion between the coating and the substrate is poor. Printing, brightening, matting, moisture curing and other surface treatments have the characteristics of difficulty in wetting and spreading, and poor recoatability, which reduces the feasibility of improving the surface effect and trend effect of products through post-treatment processes

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Preparation of double-bond-terminated polyurethane prepolymer: 40 parts of poly(1,3-butylene adipate) diol (PMA2000) with a number average molecular weight of 2000 and polypropylene carbonate with a number average molecular weight of 1000 Dehydrate 15 parts of ester diol (PPC1000), 20 parts of polypropylene glycol (PPG4000) with a number average molecular weight of 4000 (PPG4000) for 3 h at 120 °C under vacuum, and set aside; dehydrated PMA2000, PPC1000, PPG4000, 1.5 parts of 1,4- Add butanediol into the reaction kettle, then add 10 parts of isophorone diisocyanate, 10 parts of hexamethylene diisocyanate, and 0.1 part of organic bismuth catalyst in sequence, raise the temperature to 85 ° C, stir for 1 h, and then add 1 part of internal Cross-linking agent trimethylolpropane, continue to stir and react at 85 °C for 1.5 h, then cool down to 60 °C, add 11 parts of end-capping agent-2-hydroxyethyl acrylate, stir for 8 h, seal and pack for use;

[0021] (2) Preparation o...

Embodiment 2

[0024] (1) Preparation of double bond-terminated polyurethane prepolymer: 20 parts of polypropylene carbonate diol (PPC3000) with a number average molecular weight of 3000 and 30 parts of polypropylene glycol (PPG2000) with a number average molecular weight of 2000 were placed in a vacuum at 120 °C Dehydrate for 4 hours under the same conditions, and set aside; add the dehydrated PPC3000, PPG2000, 1 part of 1,4-butanediol into the reaction kettle, and then add 15 parts of diphenylmethane diisocyanate (MDI-50) and organic bismuth catalyst 0 After stirring and reacting for 1 h, add 0.5 parts of internal crosslinking agent trimethylolpropane, continue stirring and reacting at 75 °C for 1.5 h, then cool down to 60 °C, add end-capping agent 2-hydroxyethyl acrylate 6 parts, stirred and reacted for 7 h, sealed and packaged for use;

[0025] (2) Preparation of modified silicone synthetic leather coating: Add 30 parts of double bond-terminated polyurethane prepolymer and 75 parts of vi...

Embodiment 3

[0028] (1) Preparation of double bond-terminated polyurethane prepolymer: Dehydrate 45 parts of polypropylene glycol (PPG2000) with a number average molecular weight of 2000 under vacuum conditions at 120 °C for 4 h, and set aside; dehydrated PPG2000, 1 part of 1, Add 4-butanediol into the reaction kettle, then add 12 parts of dihexamethylene diisocyanate and 0.05 parts of organic bismuth catalyst in sequence, raise the temperature to 85 °C, stir and react for 1 hour, then add 1 part of internal crosslinking agent trimethylol Propane, continue to stir and react at 85 °C for 1.5 h, then cool down to 60 °C, add 7 parts of end-capping agent 2-hydroxyethyl acrylate, stir for 7 h, seal and pack for use;

[0029] (2) Preparation of modified silicone synthetic leather coating: Add 48 parts of double bond-terminated polyurethane prepolymer and 72 parts of vinyl-terminated silicone oil with a vinyl content of 0.3% to hydrogen-containing silicone oil with a hydrogen content of 0.8%. 30 ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for improving the surface tension and recoatability of an organosilicone synthetic leather coating. Through the coordination addition reaction of a silicon hydrogen bond and a double bond, a polarity polyurethane chain segment with a terminal sealed by the double bond is introduced into an organosilicone synthetic leather coating material, the surface tension and recoatability of the organosilicone synthetic leather coating are improved, the technical problems that a monotonous organosilicone synthetic leather coating is poor in adhesion to base cloth, after-finishing wet smoothness and recoatability due to the low surface energy is effectively solved, and the method has the feasibility of changing the product aesthetics effect and special effect. In addition, the prepared modified organosilicone coating has the advantage of keeping the wear resistance, scratching resistance, cold resistance, water resistance and the like of the organosilicone coating,does not contain any organic solvent, has the outstanding green and environment-friendly characteristics, and can be widely applied to the industries of leather, synthetic leather, textiles, plastic,rubber, building material, coating and the like.

Description

technical field [0001] The invention relates to a method for improving the surface tension and recoatability of an organosilicon synthetic leather coating, and belongs to the technical field of coatings and adhesives. Background technique [0002] With the development of modern industry, organosilicon materials are used in leather / Synthetic leather, architectural coatings, automobiles, daily chemicals, electronics and other industries have been widely used. But on the whole, for a long time, silicone materials have not been applied as coating materials themselves, but only in the form of additives, which still belong to the category of additives. In the late 20th century, some researchers began to think about the feasibility and implementation of using silicone as a coating material alone, and made significant progress. At present, products based on silicone synthetic leather coating, such as silicone leather and silicone synthetic leather, have achieved large-scale produ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): D06N3/00D06N3/12
Inventor 范浩军孙哲陈意颜俊向均文嘉婷
Owner SICHUAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap