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A kind of waterborne polyurethane with self-stabilizing foam function and its preparation method and application

A water-based polyurethane, functional technology, applied in textiles and papermaking, can solve problems such as safety, reduce production costs, pollution, etc., and achieve the effect of improving employment environment, reducing production costs, and stabilizing foam.

Active Publication Date: 2021-04-23
SHANDONG TIANQING TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Purpose of the invention: In order to solve the deficiencies in the prior art, the present invention provides a water-based polyurethane resin with self-stabilizing foam function, which is mainly used for synthetic leather and leather foam layer, and solves the pollution and problems in the current solvent-based polyurethane wet process. Safety issues, the main resin used in the foaming slurry is water-based polyurethane with self-stabilizing function, and no or less foam-stabilizing additives can be used, which reduces production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: Water-based polyurethane with self-stabilizing foam function

[0030] 300 grams of polytetrahydrofuran diol (number-average molecular weight: 3000) was vacuum dehydrated at 120°C for 1 hour, cooled to 50°C, added 64 grams of toluene diisocyanate, 0.08 grams of stannous octoate catalyst, and reacted at 65°C under mechanical stirring 3 hours, 5.3 grams of 1,4-butanediol, 13.8 grams of dimethylolpropionic acid, and 30 grams of acetone were dropped into the mixture at 70 ° C for 3.5 hours, and 20 grams of polyethylene glycol butyl ether (number average molecular weight of 350 ), react at 70°C for 2 hours, add 50 grams of acetone to cool down to 40°C, add 9.9 grams of triethylamine and stir for 15 minutes, under high-speed stirring, add 417 grams of deionized water to the above reaction solution, and then distill under reduced pressure to remove the acetone. A waterborne polyurethane with a solid content of 49.6% was obtained.

Embodiment 2

[0031] Embodiment 2: Water-based polyurethane with self-stabilizing foam function

[0032] With 200 grams of polytetrahydrofuran diol (number average molecular weight is 1000), 100 grams of polypropylene glycol (number average molecular weight is 2000) vacuum dehydration at 120 DEG C for 1 hour, cool to 70 DEG C, add 148 grams of isophorone diisocyanate, 0.1 gram of stannous octoate catalyst, reacted at 85°C for 3 hours under mechanical stirring, put 4 grams of 1,6-hexanediol, 14 grams of dimethylol propionic acid, and 50 grams of acetone into the mixture and reacted at 80°C for 2.5 hours, Add 50 grams of polyethylene glycol butyl ether (the number average molecular weight is 750), react at 80°C for 2.5 hours, add 50 grams of acetone to cool to 40°C, add 10.03 grams of triethylamine and stir for 30 minutes, under high-speed stirring, remove 376 grams of Ionized water was added to the above reaction solution, and then the acetone was distilled off under reduced pressure to obta...

Embodiment 3

[0033] Embodiment 3: Water-based polyurethane with self-stabilizing foam function

[0034] 200 grams of polybutylene adipate diol (number average molecular weight is 2000) and 100 grams of polytetrahydrofuran diol (number average molecular weight is 2000) are vacuum dehydrated at 120°C for 1 hour, cooled to 75°C, and added 110 grams of dicyclohexylmethane diisocyanate and 0.1 gram of organic bismuth catalyst were reacted at 90°C for 2.5 hours under mechanical stirring, and 5 grams of neopentyl glycol, 13.6 grams of dimethylol propionic acid, and 60 grams of acetone were dropped into the mixture for 85 ℃ for 2.5 hours, add 80 grams of polyethylene glycol butyl ether (number average molecular weight 1000), 85 ℃ for 2.5 hours, add 30 grams of acetone to cool down to 40 ℃, add 9.74 grams of triethylamine and stir for 20 minutes, under high speed stirring 595 grams of deionized water were added to the reaction solution, and then the acetone was distilled off under reduced pressure ...

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Abstract

The invention discloses a water-based polyurethane with a self-stabilizing function and its preparation method and application, which are mainly used for leather and synthetic leather foam layers, wherein the water-based polyurethane with a self-stabilizing function consists of the following parts by weight Raw material composition: 50-150 parts of diisocyanate, 150-350 parts of diol, 5-25 parts of small molecule chain extender, 10-50 parts of polyethylene glycol monobutyl ether, 0.01-0.1 part of catalyst, neutralizer 3-15 servings. The water-based foaming slurry of the present invention completely eliminates organic pollution from the source, saves organic solvent resources, eliminates potential safety hazards, improves the employment environment of laborers, and reduces the use of foam-stabilizing additives at the same time, which is in line with the national green environmental protection and new and old standards. Policies can be converted; the obtained leather products have high peel strength and room temperature folding resistance, soft hand feeling and excellent air permeability.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a water-based polyurethane with a self-stabilizing function, a preparation method and an application thereof. Background technique [0002] my country is a big country in the production and consumption of leather and synthetic leather, but the traditional leather product industry generally uses solvent-based polyurethane as the foam layer material, which produces a large amount of waste gas and waste water pollutants in the production process. As the country advocates green and environmentally friendly production, the industry also Facing the severe challenge of how to eliminate or reduce the environmental pollution caused by the emission of exhaust pollutants. [0003] In the prior art, the foaming resins used in the finishing stage of leather products are usually solvent-based resins, and a small amount of water-based foaming resins are used. The existing foaming res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/34C08G18/32D06N3/14D06N3/00C08G101/00
CPCC08G18/3206C08G18/348C08G18/4804C08G18/4833C08G18/4854C08G18/6692C08G2101/00D06N3/0045D06N3/146D06N3/147D06N3/148D06N2209/103D06N2209/123D06N2209/1664D06N2211/28
Inventor 宁继鑫刘娅林徐旭东胡文翠闫克辉陈建栋王铁森陈玉国郑萍苗吉宾
Owner SHANDONG TIANQING TECH DEV