Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of high-R-value solvent-free waterborne polyurethane microfiber synthetic leather

A water-based polyurethane, solvent-free technology, used in textiles and papermaking, can solve the problems of microfiber synthetic leather being harmful, environmentally friendly, and volatile, and achieve the effects of plump hand, easy dispersion and emulsification, and good stability.

Inactive Publication Date: 2021-09-03
明新梅诺卡(江苏)新材料有限公司
View PDF3 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prepolymer prepared by the acetone method contains a large amount of solvent, is volatile, and is not environmentally friendly. It will be partially harmful when applied to superfine fiber synthetic leather.

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
  • Preparation method of high-R-value solvent-free waterborne polyurethane microfiber synthetic leather
  • Preparation method of high-R-value solvent-free waterborne polyurethane microfiber synthetic leather
  • Preparation method of high-R-value solvent-free waterborne polyurethane microfiber synthetic leather

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Step 1: Drying of polyether polyol

[0063] First, 120g of polytetrahydrofuran ether glycol (PTMG2000) and 25g of polyethylene glycol monomethyl ether were added to a 500ml four-necked flask equipped with an electric stirrer, a thermometer, a constant pressure funnel and a vacuum pump, then the electric stirrer was turned on for stirring, and the oil bath was opened Heat up the pot, turn on the vacuum pump to vacuum the four-necked flask, start timing when the thermometer on the four-necked flask reaches 110°C and the vacuum pressure is ≤-0.08MPa, keep the temperature at 100°C-110°C, and the pressure ≤-0.08 Vacuum dehydration under the condition of MPa for 1h.

[0064] Step 2: Preparation of high R value solvent-free waterborne polyurethane prepolymer

[0065] When the water content in the polyol is less than 0.05%, turn off the vacuum pump, lower the temperature of the oil bath, add 1.5g trimethylolpropane (TMP) and 0.7g neopentyl glycol (NPG) during the cooling proce...

Embodiment 2

[0075] Step 1: Drying of polyether polyol

[0076] Add 130g of PTMG2000, 20g of polypropylene glycol (PPG3000), 25g of polyethylene glycol monomethyl ether into a 500ml four-necked flask equipped with an electric stirrer, a thermometer, a constant pressure funnel and a vacuum pump, then turn on the electric stirrer for stirring, open the oil bath Raise the temperature, turn on the positive air pump to vacuumize the four-necked flask, start timing when the thermometer on the four-necked flask reaches 110°C and the vacuum pressure is ≤-0.08MPa, keep the temperature at 110-120°C, and the pressure ≤-0.08MPa Under the condition of vacuum dehydration for 1h.

[0077] Step 2: Preparation of high R value solvent-free waterborne polyurethane prepolymer

[0078] When the water content in the polyol is less than 0.05%, turn off the vacuum pump, lower the temperature of the oil bath, add 1g of silane crosslinking agent (305) and 0.5g of NPG during the cooling process, and continue to coo...

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 preparation method of high-R-value solvent-free waterborne polyurethane microfiber synthetic leather. The molecular weight and viscosity of a prepolymer are controlled by controlling the R value of the prepolymer, so that the polyurethane resin which is easy to disperse and emulsify, free of any organic solvent, small in particle size, high in solid content, good in stability and low in cost is obtained. After resin is formed into a film, the film has relatively good alkali resistance and temperature resistance and relatively high elongation at break and breaking strength, and the modulus is 100%; and after the resin is applied to the microfiber base cloth, the microfiber base cloth is plump in hand feeling, elastic and uniform in cloth cover. The solvent-free waterborne polyurethane is high-R-value solvent-free waterborne polyurethane with excellent performance and stable performance, and is very suitable for large-scale production.

Description

technical field [0001] The invention relates to the technical field of waterborne polyurethane and superfiber synthetic leather, in particular to a method for preparing high R value solvent-free waterborne polyurethane superfiber synthetic leather. Background technique [0002] Natural leather is a kind of polymer composite material with high strength, good elasticity, high moisture and heat resistance stability and excellent hygienic performance made from animal raw hide through a series of physical and chemical processing. As we all know, natural leather products have excellent performance and are favored by many consumers. The reason is that natural leather products have the advantages of strong moisture absorption, excellent water vapor permeability, and good wearing comfort. However, natural leather resources are limited, and the development of products with excellent performance Synthetic leather as a necessary supplement is the current research hotspot. The superfine ...

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): D06N3/14D06N3/00C08G18/66C08G18/48C08G18/12C08G18/32
CPCD06N3/14D06N3/0004C08G18/12C08G18/4804C08G18/4854C08G18/48C08G18/6677C08G18/6674C08G18/4808C08G18/4825D06N2209/1635D06N2211/28C08G18/3234
Inventor 庄君新霍俊丽宋兵
Owner 明新梅诺卡(江苏)新材料有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com