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A kind of isocyanate prepolymer mixture for solvent-free polyurethane shoe leather and its preparation method and application

An isocyanate prepolymerized, solvent-free polyurethane technology is applied in the field of synthetic leather, which can solve the problems of easy wrinkling, easy rebound, and difficulty in shaping the leather surface, and achieve the effects of good shaping performance, reducing thermosetting and improving plasticity.

Active Publication Date: 2021-01-05
HEFEI ANLI POLYURETHANE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a solvent-free polyurethane shoe leather isocyanate prepolymer mixture and its preparation method and use, so as to solve the problems of difficult shaping, easy rebound and easy leather surface in the post-processing process of solvent-free polyurethane shoe leather products. wrinkling problem

Method used

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  • A kind of isocyanate prepolymer mixture for solvent-free polyurethane shoe leather and its preparation method and application
  • A kind of isocyanate prepolymer mixture for solvent-free polyurethane shoe leather and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A solvent-free isocyanate prepolymer mixture for polyurethane shoe leather, which is composed of polyether-modified isocyanate prepolymer B1 and silicone-modified isocyanate prepolymer B2 according to the mass ratio of 9 / 1, and then reactively diluted Agent S diluted to 90% solid content, viscosity 3000-5000mPa.S / 25℃;

[0036] The polyether-modified isocyanate prepolymer B1 is a mixture with an isocyanate mass percentage of 8%, consisting of the following components in parts by mass:

[0037] MDI 64 parts,

[0038] DDL-1000D 100 copies;

[0039] The silicone-modified isocyanate prepolymer B2 is a mixture with an isocyanate mass percentage of 8%, and consists of the following components in parts by mass:

[0040] MDI-100L 95 parts,

[0041] MDI-30 5 parts,

[0042] Tech-2120 174 copies;

[0043] Reactive reactive diluent S is Jeffsol propylene carbonate product produced by Huntsman Company of the United States; MDI is pure 4.4'-diphenylmethane diisocyanate product p...

Embodiment 2

[0050] A solvent-free isocyanate prepolymer mixture for polyurethane shoe leather, which is composed of polyether-modified isocyanate prepolymer B1 and silicone-modified isocyanate prepolymer B2 according to the mass ratio of 4 / 6, and then reactive reactive dilution Agent S diluted to 60% solid content, viscosity 3000-5000mPa.S / 25℃;

[0051] The polyether-modified isocyanate prepolymer B1 is a mixture with a mass percentage of isocyanate of 4%, consisting of the following components in parts by mass:

[0052] H12MDI 21.5 parts,

[0053] DDL-4000D 100 copies,

[0054] The silicone-modified isocyanate prepolymer B2 is a mixture of 4% isocyanate by mass, and consists of the following components in parts by mass:

[0055] MDI-100L 70 parts,

[0056] MDI-30 30 parts,

[0057] Tech-2140 432.5 parts,

[0058] H12MDI is a hydrogenated 4.4'-diphenylmethane diisocyanate product produced by Yantai Wanhua Chemical Company; DDL-4000D is a polyoxypropylene diol product with a molecular...

Embodiment 3

[0065] A solvent-free isocyanate prepolymer mixture for polyurethane shoe leather, which is composed of polyether-modified isocyanate prepolymer B1 and silicone-modified isocyanate prepolymer B2 according to the mass ratio of 7 / 3, and then reactive reactive dilution Agent S is diluted to a solid content of 80% and a viscosity of 5000mPa.S / 25°C;

[0066] The polyether-modified isocyanate prepolymer B1 is a mixture with an isocyanate mass percentage of 6%, consisting of the following components in parts by mass:

[0067] MDI 37 servings,

[0068] DP-2000E 100 copies,

[0069] The silicone-modified isocyanate prepolymer B2 is a mixture of 6% isocyanate by mass, and consists of the following components in parts by mass:

[0070] MDI-100L 80 parts,

[0071] MDI-30 20 parts,

[0072] Tech-2140 295 copies,

[0073] DP-2000E is a polyoxypropylene-oxyethylene copolymer glycol product with a molecular weight of 2000 produced by Kunshan Guodu Chemical Company;

[0074] The preparat...

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Abstract

The invention discloses an isocyanate prepolymer mixture for solvent-free polyurethane shoe leather, a preparation method and uses thereof, wherein a polyether modified isocyanate prepolymer B1 and anorganosilicon modified isocyanate prepolymer B2 are mixed, and the obtained mixture is diluted with a reactive active diluent S to obtain the isocyanate prepolymer mixture, wherein B1 is prepared from isocyanate and polyether diol, and B2 is prepared from isocyanate and organosilicon diol. The invention further provides the use of the isocyanate prepolymer mixture, wherein solvent-free polyurethane coatings can be prepared by combining the isocyanate prepolymer mixture and polyester type, polycarbon type or polyether type polyols, and the isocyanate prepolymer mixture is used for the processing of solvent-free polyurethane shoe leather, can be used for preparing settable, anti-bounce, wrinkle-free and solvent-free polyurethane shoe leather products, and can solve the post-processing problem of solvent-free polyurethane shoe leather products.

Description

technical field [0001] The invention relates to the field of synthetic leather, in particular to a solvent-free polyurethane shoe leather isocyanate prepolymer mixture and a preparation method and application thereof. Background technique [0002] Solvent-free polyurethane synthetic leather technology, as an emerging environmentally friendly manufacturing technology in the synthetic leather industry, has been rapidly researched and applied by major synthetic leather companies in recent years. The prepared solvent-free polyurethane synthetic leather products are widely used in sofa furniture materials, massage chair materials, and luggage materials because of their environmental protection, health, and excellent durability (generally, the durability can reach more than 5-10 years). , automotive interior materials and other fields, and gradually gained market recognition for its quality and post-processing applicability. [0003] Polyurethane shoe leather is a very important ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/32C08G18/79C08G18/61C08G18/10C08G18/75C08G18/42C08G18/44D06N3/14
CPCC08G18/10C08G18/4825C08G18/4837C08G18/61C08G18/725C08G18/758C08G18/7671C08G18/797D06N3/146C08G18/3218C08G18/42C08G18/44C08G18/48
Inventor 王海峰李晓飞孔为青范仁祥黄万里姚克俭
Owner HEFEI ANLI POLYURETHANE NEW MATERIAL