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A wet polyurethane resin for impregnation with high tear strength and hydrolysis resistance and preparation method thereof

A high tear strength, polyurethane resin technology, used in textiles, papermaking, fiber processing, etc., can solve problems such as non-environmental protection, and achieve the effect of improving peel strength, increasing peel strength, and high product quality.

Active Publication Date: 2015-09-02
HEFEI ANLI POLYURETHANE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention does not pay attention to the improvement of tear strength, and at the same time, organic fluorine is used, which is not environmentally friendly

Method used

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  • A wet polyurethane resin for impregnation with high tear strength and hydrolysis resistance and preparation method thereof
  • A wet polyurethane resin for impregnation with high tear strength and hydrolysis resistance and preparation method thereof
  • A wet polyurethane resin for impregnation with high tear strength and hydrolysis resistance and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1. Raw material and ratio:

[0039]

[0040]

[0041] 2. Preparation method:

[0042] 1) Add the polyol compounds PCL-2, PTMEG-2, PPG-2 and PEG-2 and the antioxidant I-1010 into the solvent DMF, stir well and then add MDI and organic bismuth catalyst BiCAT8106 (leading American chemical company Production), react at 75-85°C for 1-3 hours to obtain a prepolymer with a solid content of 55%;

[0043] 2) Add glycol chain extenders EG and BG and the rest of MDI to the prepolymer prepared in step 1), stir evenly, and continue to react at 75-85°C for 2-5h, during the reaction process As the viscosity of the system increases, the organic solvent is continuously replenished so that the final viscosity is controlled at 40000-80000cps / 25°C. After the reaction is completed, 0.5-2kg of reaction terminator methanol is added.

Embodiment 2

[0045] 1. Raw material and ratio:

[0046]

[0047] 2. Preparation method:

[0048] 1) Add polyol compounds SP-1, PTMEG-2, PPG-2 and PEG-2 and antioxidant I-1010 into the solvent DMF, stir well and add MDI and organic bismuth catalyst BiCAT8106 (leading American chemical company Production), react at 75-85°C for 1-3 hours to obtain a prepolymer with a solid content of 55%;

[0049] 2) Add glycol chain extenders EG and BG and the rest of MDI to the prepolymer prepared in step 1), stir evenly, and continue to react at 75-85°C for 2-5h, during the reaction process As the viscosity of the system increases, the organic solvent is continuously replenished so that the final viscosity is controlled at 40000-80000cps / 25°C. After the reaction is completed, 0.5-2kg of reaction terminator methanol is added.

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Abstract

The invention discloses wet polyurethane resin with high tear strength and hydrolysis resistance for impregnation and a preparation method of the wet polyurethane resin. The polyurethane resin comprises the following components in parts by mass: 6-10 parts of isocyanate, 16-26 parts of polyol compound, 1-3 parts of polyol chain extender, 0-0.3 part of antioxidant, 0-0.05 part of reaction terminator methanol, and an organic tin or organic bismuth catalyst, wherein the dosage of the organic tin or organic bismuth catalyst is 0.001-0.05 percent of the mass of the polyol compound. The polyurethane resin can be used for greatly improving and increasing physical properties, such as peel strength, tear strength and hydrolysis resistance, of resins, is durable, and has market competitiveness.

Description

1. Technical field [0001] The invention relates to a functional polyurethane resin and a preparation method thereof, in particular to a wet polyurethane resin for impregnation with high tear strength and hydrolysis resistance and a preparation method thereof. 2. Background technology [0002] Polyurethane synthetic leather can make the back of the cloth base have the effect of imitation leather through the impregnation process, with high grade and good quality. The impregnation resin generally requires excellent hydrolysis resistance, fast impregnation speed, and suitable film-forming property, which is conducive to the penetration of the coating material, strengthens the combination of the coating material and the cloth base, and the finished leather has a higher tear strength. The existing hydrolysis-resistant impregnation resin usually uses polytetrahydrofuran diol, but because of its high cost, the tear strength tends to drop rapidly when the modulus is slightly high. In...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/42C08G18/32C08G18/22C08G18/24C08G18/12D06M15/572D06M15/568
Inventor 张彪惠坚强武春余吴兴保尹凯凯
Owner HEFEI ANLI POLYURETHANE NEW MATERIAL
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