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

Preparation method of water-based polyurethane, emulsion and product

A water-based polyurethane and emulsion technology, which is applied to polyurea/polyurethane coatings, coatings, etc., can solve the problems of insufficient water-based polyurethane effects, and achieve the effects of low preparation cost, less peculiar smell, and increased diffuse reflection.

Inactive Publication Date: 2016-05-25
FUJIAN DONGTAI HIGH POLYMER MATERIAL CO LTD
View PDF5 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a preparation method of water-based polyurethane to solve the problem that the effect of water-based polyurethane products in the prior art is not good enough

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

preparation example Construction

[0019] A kind of preparation method of water-based polyurethane of the present invention, comprises the following steps, at first, 100 weight parts of polyester polyols are added in the reactor and start agitator, after 1-3 hours of vacuum dehydration at 110-130 degree centigrade, cool down;

[0020] When the temperature drops to 50-60 degrees Celsius, 40-47 parts by weight of isophorone diisocyanate is added to the reactor, and the reaction temperature is controlled at 85-95 degrees Celsius for 1 hour;

[0021] Drop in 0.004-0.006 parts by weight of organic bismuth catalyst and continue the reaction for one hour, then cool down to 65-75 degrees Celsius, add 10.3-11.3 parts by weight of dimethylolpropionic acid and 9-11 parts by weight of dimethylformamide, and control the reaction temperature At 80-90 degrees Celsius, measure NCO residue after two hours;

[0022] When the residual amount of NCO reaches 3.5%, the temperature is lowered to 45-55 degrees Celsius, 14-16 parts by ...

Embodiment 1

[0026] Add 200kg of polyester polyol into the reaction kettle, start the mixer, dehydrate under vacuum at 110-130 degrees Celsius for 1 hour, and then cool down;

[0027] When the temperature dropped to 50 degrees Celsius, 87kg of isophorone diisocyanate was added to the reactor, and the temperature of the reaction was controlled at 85-95 degrees Celsius for 1 hour;

[0028] Drop in 10 g of bismuth carboxylate catalyst (Deyin Chemical DY-20) and continue the reaction for one hour, then cool down to 65 degrees Celsius, add 21.6 kg of dimethylol propionic acid and 20 kg of dimethylformamide, and control the reaction temperature at 80-90 degrees Celsius, NCO residuals were measured after two hours;

[0029] When the NCO residual amount reaches 3.5%, cool down to 45 degrees Celsius, add 30 kg of acetone and 16 kg of triethylamine, and stop stirring after 10 minutes to form a prepolymer;

[0030] Also carry out the emulsification step, first add 750kg of pure water to remove calci...

Embodiment 2

[0033] Add 200kg polyester polyol into the reaction kettle, start the mixer, dehydrate under vacuum at 110-130 degrees Celsius for 2 hours, and then cool down;

[0034] When the temperature dropped to 55 degrees Celsius, 80kg of isophorone diisocyanate was added to the reactor, and the temperature of the reaction was controlled at 85-95 degrees Celsius for 1 hour;

[0035] Add 8 g of bismuth carboxylate catalyst (Deyin Chemical DY-20) to continue the reaction for one hour, then cool down to 70 degrees Celsius, add 20.6 kg of dimethylol propionic acid and 18 kg of dimethylformamide, and control the reaction temperature at 80-90 degrees Celsius, NCO residuals were measured after two hours;

[0036] When NCO residual amount reaches 3.5%, cool down to 50 degrees Celsius, add acetone 28kg and triethylamine 14kg parts by weight and stop stirring after 10 minutes to form a prepolymer;

[0037] Also carry out the emulsification step, first add 680kg of pure water by weight to remove ...

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

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a preparation method of a water-based polyurethane, an emulsion and a product. The method comprises the following steps: adding polyester polyol into a reaction kettle, starting a stirrer, carrying out vacuum dehydration at 110-130 DEG C for 1-3 hours, and cooling; when the temperature drops to 50-60 DEG C, adding isophorone diisocyanate into the reaction kettle, and controlling the reaction temperature at 85-95 DEG C for one hour; dropwisely adding an organic bismuth catalyst, continuing the reaction for one hour, cooling to 65-75 DEG C, adding dimethylolpropionic acid and dimethylformamide, controlling the reaction temperature at 80-90 DEG C for two hours, and detecting the NCO residue level; and when the NCO residue level reaches 3.5%, cooling to 45-55 DEG C, adding acetone and triethylamine, and stopping stirring after 10 minutes, thereby forming the prepolymer. The method solves the problem of imperfect effect of the water-based polyurethane product in the prior art.

Description

technical field [0001] The invention relates to the field of chemical preparations, in particular to a method for preparing water-based polyurethane for leather surface treatment. Background technique [0002] With the development of the leather industry, leather products have been more and more widely used in people's daily life. The synthetic leather made of polyurethane resin has also been widely used in many technical fields such as clothing and outdoor shoe materials. Finishing is the last process in the manufacturing process of synthetic leather, and it is also one of the more critical processes. The use of resin coating can increase the beauty and durability of leather, improve the grade of leather, and endow the finished leather with beautiful appearance, comfortable handle and good mechanical properties. Among all kinds of finishing agents, polyurethane leather finishing agents have good flexibility, low temperature resistance and fatigue resistance, etc., and its...

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): C08G18/75C08G18/66C08G18/42C08G18/32C08G18/34C08G18/12C09D175/06C09D7/12
CPCC08G18/755C08G18/0823C08G18/12C08G18/4238C08G18/6659C08K3/36C09D7/61C09D175/06C08G18/3228
Inventor 张策张作霖李大志
Owner FUJIAN DONGTAI HIGH POLYMER MATERIAL CO LTD
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