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A kind of weak solvent system pu resin and preparation method thereof

A technology of PU resin and weak solvent, which is applied in the field of weak solvent system PU resin and its preparation, can solve the problems of non-environmental protection, slow drying speed of PU ink, etc., and achieve the effects of fast volatilization speed, cheap price and improved efficiency

Active Publication Date: 2019-10-18
肇庆市华莱特复合新型材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that the current PU ink has the problems of slow drying speed and environmental protection

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The present invention comprises the following raw materials in parts by weight: 71.74 parts of mixed solvents, 21.31 parts of polyester polyols, 5.68 parts of MDI, 1.07 parts of small molecule chain extenders, 0.10 parts of organic catalysts and 0.10 parts of antioxidants .

Embodiment 2

[0032] The present invention comprises the following raw materials in parts by weight: 68 parts of mixed solvents, 24 parts of polyester polyols, 7 parts of MDI, 0.9 parts of small molecule chain extenders, 0.05 parts of organic catalysts and 0.05 parts of antioxidants .

Embodiment 3

[0034] The present invention comprises the following raw materials in parts by weight: 73 parts of mixed solvents, 19 parts of polyester polyols, 7 parts of MDI, 1.2 parts of small molecule chain extenders, 0.15 parts of organic catalysts and 0.10 parts of antioxidants .

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PUM

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Abstract

The present invention discloses a weak solvent system PU resin and a preparation method thereof, wherein the weak solvent system PU resin comprises the following raw materials by weight: 68-73 parts of a mixed solvent, 19-24 parts of polyester polyol, 3-7 parts of MDI, 0.8-1.2 parts of a small molecule chain extender, 0.05-0.15 part of an organic catalyst, and 0.05-0.15 part of an antioxidant. According to the present invention, the weak solvent system PU resin is used in the shoe production industry, is particularly suitable for the surface coating decoration of PU materials, can be used for coat spraying and printing of the surface of shoe materials and the like, has advantages of fast evaporation and low cost, can greatly improve the efficiency of the sole modification process, and further has advantages of corresponding benefit increasing, energy saving, and high efficiency.

Description

technical field [0001] The invention relates to PU resin, in particular to a weak solvent system PU resin and a preparation method thereof. Background technique [0002] The PU inks on the market now need to be diluted with strong soluble solvents such as cyclohexanone and DMF (Chinese name dimethyl fumarate), and the dilution ratio of the diluent is 1.5 to 2 times. , DMF accounts for more than 45%, and DMF needs to be added to PU ink to improve adhesion. [0003] However, strong solvents have the following disadvantages: [0004] (1) The volatilization speed is slow, the drying speed is slow, and the price is relatively expensive; [0005] (2) DMF is mainly used for sterilization and mildew prevention in the production, storage, and transportation of leather, footwear, and textiles. It is prone to allergies, skin eczema, and burns after contact with the skin. Many shoe chemicals have been tested for environmental protection. Standards (such as EU standards) clearly point...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/42C08G18/66C08G18/76C08G18/08C08K5/524C09D175/06
Inventor 陈应华徐进勇
Owner 肇庆市华莱特复合新型材料有限公司