Polyurethane resin used for non-solvent leather with high brightness and bending resistance, preparation method and application

A tortuosity-resistant, solvent-free technology, applied in polyurea/polyurethane coatings, textiles, papermaking, coatings, etc., can solve problems such as insufficient aesthetics and difficulty in making high-transparency, tortuous-resistant surface leather, etc., to improve production Operability, high transparency and high brightness aesthetics, and the effect of ensuring stability

Active Publication Date: 2018-07-06
ZHEJIANG HUAFON SYNTHETIC RESIN
View PDF17 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The current polyurethane surface layer grease for solvent-free leather is difficult to produ

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Polyurethane resin used for non-solvent leather with high brightness and bending resistance, preparation method and application
  • Polyurethane resin used for non-solvent leather with high brightness and bending resistance, preparation method and application
  • Polyurethane resin used for non-solvent leather with high brightness and bending resistance, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0051] Example 1

[0052] 30.00kg of polyetherester polyol-toluene diisocyanate prepolymer (number average molecular weight is 10000, functionality is 2), 26.00kg of polyoxypropylene glycol (number average molecular weight is 5000), 19.50kg of polyoxyethylene Propylene triol (number average molecular weight is 9000), 19.50kg polyoxypropylene tetraol (number average molecular weight 10000) is heated to 120°C, dehydrated under -0.01MPa vacuum for 6h, then cooled to 30°C, add 2.10kg of ethylene glycol, 0.90kg of trimethylolpropane, 0.70kg of silicone foam stabilizer, 0.50kg of siloxane defoamer, 0.15kg of ultraviolet absorber UV-320, 0.30kg of light stabilizer Resin 292, 0.05kg antioxidant 245 and 0.30kg organotin metal catalyst are mixed and stirred for 2h, and the hydroxyl value and moisture content are detected. When the hydroxyl value reaches 64.8mgKOH / g and the moisture content is less than 500ppm, the resin group A is prepared Divide, sealed and packaged for later use;

[0053...

Example Embodiment

[0055] Example 2

[0056] 45.00kg of polyether ester polyol-diphenylmethane diisocyanate prepolymer (number average molecular weight is 10000, functionality is 4), 35.00kg polytetrahydrofuran ether glycol (number average molecular weight is 10000), 10.00kg Polyoxypropylene-ethylene oxide triol (number average molecular weight of 12000), 5.00kg of polyoxypropylene tetraol (number average molecular weight of 20,000) heated to 140°C, dehydrated under vacuum conditions of -0.06MPa for 5h, Cool down to 50℃, add 2.47kg of 1,4-butanediol, 0.13kg of trimethylolpropane, 0.30kg of silicone foam stabilizer, 0.30kg of silicone defoamer, 0.45kg of ultraviolet light Absorbent UV-320, 0.36kg light stabilizer 292, 0.09kg antioxidant 245 and 0.90kg organotin metal catalyst were mixed and stirred for 2h, and the hydroxyl value and moisture content were detected. When the hydroxyl value reached 60.3mgKOH / g, the moisture content When it is less than 500ppm, the resin A component is prepared, and th...

Example Embodiment

[0059] Example 3

[0060] 38.00kg of polyetherester polyol-toluene diisocyanate prepolymer (number average molecular weight is 30,000, functionality is 3), 25.00kg of polyoxypropylene glycol (number average molecular weight is 20,000), 25.00kg of polyoxide Propylene triol (number average molecular weight is 18000) is heated to 130℃, dehydrated under vacuum of -0.04MPa for 5h, then cooled to 40℃, add 4.50kg ethylene glycol, 0.50kg trimethylolpropane, 2.00kg Silicone foam stabilizer, 2.00kg siloxane defoamer, 0.64kg UV absorber UV-320, 1.64kg light stabilizer 292, 0.32kg antioxidant 245 and 0.40kg organotin metal catalyst Mix and stir for 3 hours, detect the hydroxyl value and moisture content, when the hydroxyl value reaches 93.6mgKOH / g and the moisture content is less than 500ppm, the resin A component is prepared and sealed and packaged for use;

[0061] Put 24.94kg of toluene diisocyanate, 32.30kg of polyethylene adipate (number average molecular weight of 500), 1.79kg of polyox...

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 polyurethane resin used for non-solvent leather with high brightness and bending resistance, a preparation method and application. The polyurethane resin used for non-solventleather with high brightness and bending resistance comprises a resin component A and a resin component B; the resin component A comprises 30% to 45% of ether-ester polyhydric alcohol-aromatic polyisocyanates prepolymer; the resin component B comprises 15% to 60% of aromatic diisocyanate. The resin can be used for preparing polyurethane synthetic leather, the synthetic leather is high in brightness and attractive in appearance, the physical and mechanical properties, such as bending resistance, of the synthetic leather are improved preferably, the production operability of the non-solvent synthetic leather in the mass production process is improved, and the matching stability of the resin component A and the resin component B during machining is guaranteed.

Description

technical field [0001] The invention relates to a solvent-free polyurethane resin for leather, its preparation method and application Background technique [0002] Solvent-free polyurethane resins for leather generally contain two or more components. During the production of synthetic leather, two or more resin components undergo chain extension, foaming and gel reactions directly on the substrate. [0003] The production process of solvent-free polyurethane synthetic leather is: [0004] (1) Scrape coating and drying the surface layer: two or more surface layer resin components are transported to the mixing head in a certain proportion, mixed evenly, and immediately injected on the release paper, and coated by scraping to form a film After entering the drying tunnel, the polyurethane resin components react quickly, the molecular weight of the polymer increases sharply, and the polyurethane synthetic leather surface layer with a characteristic group structure is quickly gen...

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
IPC IPC(8): D06N3/14C09D175/08C08G18/32C08G18/42C08G18/48C08G18/66C08G18/76
CPCC08G18/3206C08G18/4018C08G18/42C08G18/4238C08G18/4816C08G18/4825C08G18/4829C08G18/4854C08G18/6611C08G18/7614C08G18/7671C08L2205/025C09D175/08D06N3/146C08L75/08
Inventor 于吉鹏张初银付志朋马元明张兵朱加秋
Owner ZHEJIANG HUAFON SYNTHETIC RESIN
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