Polyurethane resin, method for preparing same and application of polyurethane resin

A technology of polyurethane resin and polyether, which is applied in the direction of textiles and papermaking, etc., can solve the problems of poor hydrolysis resistance, difficult production, low strength, etc., and achieve the effects of improving heat and humidity resistance, reducing surface tension, and prolonging service life

Inactive Publication Date: 2019-04-05
HEFEI KETIAN WATERBORNE TECH CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a polyurethane resin and its preparation method and use

Method used

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  • Polyurethane resin, method for preparing same and application of polyurethane resin

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Example Embodiment

[0050] The present invention provides a method for preparing polyurethane resin, including the following steps:

[0051] The present invention provides a method for preparing a water-resistant water-resistant polyurethane resin for water-based synthetic leather. The amount of each raw material component is calculated as a percentage of the total mass of all raw materials, and includes the following steps:

[0052] (1) Prepolymer preparation: Put 0-20% castor oil modified polyol and 0-20% polyether / polyester diol into the reactor, stir and heat to 100-110°C, at -0.1Mpa( Under the condition of the first degree of vacuum), vacuum dehydration until the water content in the mixed solution in the reaction kettle is below 0.03%, cool to 40°C, put in 3 to 7% diisocyanate, stir and warm to 80 to 90°C, keep warm for reaction 2~3 hours, cool to 50℃, put in 0.5~1.5% hydrophilic chain extender, 0~1% glycerol monooleate, 0~1.2% small molecule chain extender (first chain extender) And 3~5% aceto...

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Abstract

The invention provides polyurethane resin, a method for preparing the same and application of the polyurethane resin. The method for preparing the polyurethane resin includes preparing prepolymers; carrying out emulsification treatment on the prepolymers to form emulsion; removing solvents in the emulsion to obtain the polyurethane resin. The polyurethane resin, the method and the application havethe advantages that castor oil modified polyol and glyceryl monooleate are led into waterborne polyurethane chain segments, accordingly, the hydrolysis-resistant stability of the waterborne polyurethane resin can be improved, surface tension of the waterborne polyurethane resin can be reduced, and the dispersibility of polyurethane resin powder can be improved; the polyurethane resin prepared bythe aid of the method can be applied to preparing waterborne synthetic leather, accordingly, the heat and humidity resistance of the waterborne synthetic leather can be improved, and the service lifecan be prolonged.

Description

technical field [0001] The invention relates to the field of water-based polymers, in particular to a polyurethane resin and its preparation method and application. Background technique [0002] Synthetic leather is usually a multi-layered product with polyurethane resin as the coating and woven, knitted or non-woven fabric as the base fabric. The main processes of synthetic leather production are wet process and dry process. Compared with the dry process, the synthetic leather prepared by the wet process has better touch and air permeability. The semi-finished product produced by the wet process is called bass, which must be veneered and post-processed to become a finished synthetic leather. The quality of the base layer and the surface layer directly determines the properties of the synthetic leather product, such as the feel, crease and service life. [0003] The polyurethane slurry used in traditional synthetic leather is solvent-based polyurethane, which contains a la...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/66C08G18/67C08G18/42C08G18/34C08G18/32C08G18/12D06N3/14
CPCC08G18/12C08G18/3206C08G18/348C08G18/4238C08G18/664C08G18/6659C08G18/67C08G18/7614D06N3/146D06N3/147D06N2209/06D06N2209/1621D06N2211/28C08G18/3228
Inventor 戴家兵郭文鹤朱保凌李维虎赵曦汪飞高建成
Owner HEFEI KETIAN WATERBORNE TECH CO LTD
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