Heat-resistant, sun-proof and high-color-fastness polymeric dye for leather

A polymer dye, high color fastness technology, used in the preparation of high color fastness polymer dyes, leather heat-resistant, sun-resistant fields, can solve the problem of easy migration, poor dry and wet rubbing performance, solvent intolerant, etc. problem, to achieve the effect of good sun resistance, improved heat resistance, and excellent UV protection.

Inactive Publication Date: 2019-12-27
CHINA LEATHER & FOOTWEAR IND RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention utilizes graphene oxide to modify polyurethane dyes, introduces graphene oxide into the polyurethane system, and prepares a kind of polymer dye for leather finishing. The problem of poor wet rubbing performance can also improve the heat resistance, leveling, aging resistance, sun resistance and other properties of polymer leather dyes

Method used

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  • Heat-resistant, sun-proof and high-color-fastness polymeric dye for leather
  • Heat-resistant, sun-proof and high-color-fastness polymeric dye for leather
  • Heat-resistant, sun-proof and high-color-fastness polymeric dye for leather

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Add the dried graphene oxide dry powder into water, and disperse it on a 600w power ultrasonic disperser for 1 hour. The mass fraction of graphene oxide in the graphene oxide aqueous solution is 0.5%.

[0031] (2) Add 150 parts of toluene diisocyanate, 15 parts of polyester polyol 400, 50 parts of polyether polyol 600, and 30 parts of acetone into the reaction kettle equipped with a condensation reflux device, and heat up to 85°C for 1.5 hours. Then cool down to 50°C, then add 40 parts of 2,2-dimethylolpropionic acid for chain extension, 0.1 part of tin catalyst T-9, heat up to 80°C, and react for 2.0 h; cool down to 50°C, add 15 parts of weak acid Black BG was subjected to capping reaction, heated to 80°C for 2.0 h, cooled to room temperature, added 42 parts of triethylamine, continued to react for 0.5 h, poured the reaction product into an emulsification tank, added 5000 parts of deionized water and deionized Graphene oxide water dispersion of the same quality as ...

Embodiment 2

[0034] (1) Add the dried graphene oxide dry powder into water, and disperse it on a 400w power ultrasonic disperser for 2.0 h. The mass fraction of graphene oxide in the graphene oxide aqueous solution is 0.3%.

[0035] (2) Add 40 parts of isophorone diisocyanate, 90 parts of hexamethylene diisocyanate, 15 parts of polyester polyol 600, 50 parts of polyether polyol 1000, and 40 parts of acetone, heat up to 85°C for 2.0 h, then cool down to 50°C, add 40 parts of 2,2-dimethylol propionic acid for chain extension, 0.1 part of dibutyltin dilaurate, heat up to 85°C, react for 2.0 h; cool down to 50°C, add 10 parts of solvent black 34 for capping reaction, raise the temperature to 75°C for 2.5 hours, add 45 parts of diethanolamine after cooling to room temperature, continue the reaction for 0.3h, then pour the reaction product into the emulsification tank , adding 6500 parts of deionized water and a graphene oxide water dispersion of the same quality as the deionized water, stirring...

Embodiment 3

[0038] (1) Add the dried graphene oxide dry powder into water, and disperse it on a 400w power ultrasonic disperser for 2.0 h. The mass fraction of graphene oxide in the graphene oxide aqueous solution is 0.4%.

[0039] (2) Add 120 parts of diphenylmethane diisocyanate, 5 parts of polyester polyol 200, 60 parts of polyether polyol 800, and 40 parts of acetone into the reaction kettle equipped with a condensation reflux device, and heat up to 85°C for reaction 2.0 h, then lower the temperature to 50°C, then add 35 parts of 2,2-dimethylol propionic acid for chain extension, 0.1 part of tin catalyst T-9, raise the temperature to 80°C, react for 2.0 h; cool down to 50°C, add 7 Acidic yellow G was subjected to capping reaction, heated to 75°C for 2.5 hours, cooled to room temperature and then added with 45 parts of potassium hydroxide (potassium hydroxide was first dissolved with an appropriate amount of water and cooled for later use), and the reaction was continued for 0.3 hours, ...

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Abstract

The invention discloses graphene oxide modified polyurethane polymeric dye. Polymeric leather dye is synthesized by modifying waterborne polyurethane through graphene oxide; when the polymeric leatherdye is applied in leather finish, the defect that conventional leather dye is heat-nonresistant, prone to migration and poor in dry-wet wiping performance can be better made up, and heat resistance,leveling performance, aging resistance and sunlight resistance of the polymeric leather dye can be improved.

Description

technical field [0001] The invention belongs to the field of leather finishing, and in particular relates to a method for preparing a heat-resistant, sun-resistant and high-color-fast polymer dye for leather. Background technique [0002] In order to obtain leather products with rich colors and meet the needs of customers in different environments, we need to dye the leather during the leather finishing process. [0003] The dyeing agents for conventional leather finishing are mainly pigments of various colors and a small amount of small molecule dyes: the dyes are mainly metal complex dyes, which are used to improve the brilliance of the coating color; the pigments are mainly used for coating the bottom layer, covering slight defects and The base color of the leather, so that the coating color is uniform. Leather finishing colorants mainly disperse granular pigments or dyes in the material to be dyed during dyeing, which is a physical process, and there are problems in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/00D06P1/673D06P3/32C09D175/04C09D7/61C14C11/00
CPCC09D175/04C14C11/006C09D7/61D06P1/0052D06P1/673D06P3/3266C08K3/042
Inventor 郭松庞晓燕丁志文刘娜陈永芳刘鹏杰
Owner CHINA LEATHER & FOOTWEAR IND RES INST
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