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A kind of bio-based water-based polyurethane resin and its preparation method and application

A water-based polyurethane and bio-based technology, which is applied in the field of polyurethane preparation, can solve the problems that water resistance needs to be further improved, and achieve the effect of improving water resistance, tensile deformation and strength

Active Publication Date: 2022-07-19
SHANGHAI HUIDE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its water resistance still needs to be further improved

Method used

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  • A kind of bio-based water-based polyurethane resin and its preparation method and application
  • A kind of bio-based water-based polyurethane resin and its preparation method and application
  • A kind of bio-based water-based polyurethane resin and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] In this embodiment, a bio-based water-based polyurethane resin is provided, and the preparation raw materials of the bio-based water-based polyurethane resin, in terms of weight percentage, include the following components:

[0067]

[0068] Among them, the number-average molecular weight of castor oil is 932, and the functionality is 2.7; the number-average molecular weight of polyoxyethylene-oxypropylene copolymer glycol is 4000; castor oil accounts for castor oil, Silok-8841F and polyethylene oxide-oxypropylene copolymerization 40% of the total mass of alcohol, the molar ratio of Silok-8841F to castor oil is 0.65:1.

[0069] The preparation method includes the following steps:

[0070] (1) with castor oil, part 1,6-hexamethylene diisocyanate and organic bismuth stirring 10min, wherein the mol ratio of isocyanate group in the hydroxyl group in castor oil and 1,6-hexamethylene diisocyanate is 1:2, be warming up to 75 ℃ for 2.5h, then Silok-8841F was added, and the ...

Embodiment 2

[0077] In this embodiment, a bio-based water-based polyurethane resin is provided, and the preparation raw materials of the bio-based water-based polyurethane resin, in terms of weight percentage, include the following components:

[0078]

[0079]

[0080] Among them, the number-average molecular weight of castor oil is 932, and the functionality is 2.7; the number-average molecular weight of polyoxypropylene glycol is 4000; castor oil accounts for 20% of the total mass of castor oil, Silok-8841F and polyoxypropylene glycol, and Silok The molar ratio of -8841F to castor oil was 0.9:1.

[0081] The preparation method includes the following steps:

[0082] (1) stirring castor oil, isophorone diisocyanate, part of dicyclohexylmethane diisocyanate and organic zirconium for 15min, wherein the hydroxyl group in castor oil and isophorone diisocyanate and isocyanic acid in dicyclohexylmethane diisocyanate The molar ratio of acid radicals was 0.9:2, the temperature was raised t...

Embodiment 3

[0089] In this embodiment, a bio-based water-based polyurethane resin is provided, and the preparation raw materials of the bio-based water-based polyurethane resin, in terms of weight percentage, include the following components:

[0090]

[0091] Among them, the number-average molecular weight of castor oil is 932, and the functionality is 2.7; the number-average molecular weight of polyoxyethylene-oxypropylene copolymer glycol is 1000; 40% of the total mass of alcohol, the molar ratio of Silok-8841F to castor oil is 0.9:1.

[0092] The preparation method includes the following steps:

[0093] (1) with castor oil, part dicyclohexylmethane diisocyanate and organic bismuth stirring 20min, wherein the mol ratio of isocyanate group in the hydroxyl group in castor oil and dicyclohexylmethane diisocyanate is 1.1:2, be warming up to 80 ℃ of reactions 3h, then add Silok-8841F, continue to react for 2h;

[0094] (2) Cool down to 70°C, add polyoxyethylene-propylene oxide copolyme...

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Abstract

The invention provides a bio-based water-based polyurethane resin and a preparation method and application thereof. The raw materials for the preparation of the bio-based water-based polyurethane resin include the following components in weight percentage: 3.5-17.5% of castor oil, 1.2-17.5% of monohydroxy silicone 8.1%, oligomer diol 7.3~33.6%, isocyanate 4~23%, carboxylic acid type hydrophilic chain extender and / or sulfonic acid type hydrophilic chain extender 0.5~2.8%, small molecular amine extender 0.2-5.5% of chain agent, 0-2.8% of small molecular alcohol chain extender, 0-1.3% of salt-forming agent, 0.005-0.01% of catalyst and 45-65% of deionized water. The bio-based water-based polyurethane resin of the present invention has good water resistance on the basis of ensuring excellent film-forming properties, stability and mechanical properties, and is suitable for water-based polyurethane synthetic leather.

Description

technical field [0001] The invention belongs to the technical field of polyurethane preparation, and relates to a bio-based water-based polyurethane resin and a preparation method and application thereof. Background technique [0002] Water-based polyurethane uses water as a solvent, and has the advantages of no pollution, safety and reliability, excellent mechanical properties, good compatibility, and easy modification. It has become an important direction for the development of the polyurethane industry. Polyurethane production raw materials mostly come from petrochemical products. With the exposure of excessive consumption of non-renewable resources, bio-based polyurethanes have attracted people's attention. Biodegradability, its use in the preparation of waterborne polyurethane meets the needs of production development and environmental protection. [0003] Due to the introduction of carboxylic acid hydrophilic groups into the polyurethane molecule, the water resistance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/12C08G18/66C08G18/48C08G18/34C08G18/32C08G18/67C08G18/38C08L75/14
CPCC08G18/12C08G18/6692C08G18/6685C08G18/6674C08G18/4837C08G18/348C08G18/3855C08G18/3206C08G18/36C08G18/4825C08G18/4854C08G18/4808C08G18/4833C08G18/289C08L75/14C08G18/3228C08G18/3234
Inventor 钱建中钱洪祥陈桂莲张杨静胡亮
Owner SHANGHAI HUIDE TECH CO LTD