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Artificial leather pulp for super-soft shoe leather, and preparation method of artificial leather pulp

A technology of artificial leather and slurry, which is applied in the direction of textiles and papermaking, can solve the problems that the leather surface cannot be wear-resistant and soft, the finished leather feels sticky, and the tear strength is insufficient, so as to achieve enhanced crystallinity and bonding strength High, regular and orderly molecular structure

Inactive Publication Date: 2013-09-11
XUCHUAN CHEM KUNSHAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Ultra-soft shoe leather is widely used in the production of high-end leather shoes, travel shoe leather, especially high-end high-top boots for women and other high imitation soft goat leather goods. The soft shoe leather that is popular in the market now has a short service life and poor wear resistance. Or various shortcomings such as hard feeling, especially the leather surface cannot be as wear-resistant and soft as natural leather
Generally speaking, the ether bonds contained in polyether resins are better in acid and alkali resistance than the ester bonds contained in polyester resins, but the flexibility of resins is generally achieved by sacrificing hydrolysis resistance or abrasion resistance, which is easy to cause resin softness However, the finished leather feels sticky, has insufficient tear strength, and poor wear resistance. Therefore, there is an urgent need to develop shoe leather that can have both the advantages of wear resistance and good hand feel.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] The raw material composition of polyurethane resin for super soft shoe leather is as follows: dimethylformamide 700.1g, polytetramethylene glycol adipate diol (molecular weight 4000) 48.3g, polytetrahydrofuran ether diol (molecular weight 4000) 144.8g, anti Oxygen agent BHT0.1g, ethylene glycol 7.2g, 4,4-diphenylmethane-2-isocyanate 41.5g, methanol 0.5g.

[0058] Polyurethane for ultra-soft shoe leather is synthesized by a two-step method, and the specific steps are as follows:

[0059] (1) Synthesis of prepolymer: Add polyester polyol, polyether polyol, chain extender, organic solvent and antioxidant to the reaction kettle according to the recipe, and react at a temperature of 70°C for 3 hours under normal pressure to obtain a prepolymer Polymer;

[0060] (2) Chain extension reaction: Add a formulated amount of chain extender to the above prepolymer for chain extension reaction. The temperature of the chain extension reaction is 70°C, and it is carried out under norma...

Embodiment 2

[0062] The raw material composition of polyurethane resin for super soft shoe leather is as follows: dimethylformamide 735g, polytetramethylene glycol adipate diol (molecular weight 4000) 30g, polytetrahydrofuran ether diol (molecular weight 4000) 122.2g, antioxidant BHT0.8g, ethylene glycol 60g, 4,4-diphenylmethane-2-isocyanate 50g, methanol 2g.

[0063] Polyurethane for ultra-soft shoe leather is synthesized by a two-step method, and the specific steps are as follows:

[0064] (1) Synthesis of prepolymer: Add polyester polyol, polyether polyol, chain extender, organic solvent and antioxidant to the reaction kettle according to the recipe, and react at a temperature of 80°C for 5 hours under normal pressure to obtain a prepolymer Polymer;

[0065] (2) Chain extension reaction: Add a formulated amount of chain extender to the above prepolymer for chain extension reaction. The temperature of the chain extension reaction is 80°C, and it is carried out under normal pressure. Aft...

Embodiment 3

[0067] The raw material composition of polyurethane resin for super soft shoe leather is as follows: dimethylformamide 637g, polytetramethylene glycol adipate diol (molecular weight 4000) 60g, polytetrahydrofuran ether diol (molecular weight 4000) 160g, antioxidant BHT 1 g, 80 g of ethylene glycol, 58 g of 4,4-diphenylmethane-2-isocyanate, and 4 g of methanol.

[0068] Polyurethane for ultra-soft shoe leather is synthesized by a two-step method, and the specific steps are as follows:

[0069] (1) Synthesis of prepolymer: Add polyester polyol, polyether polyol, chain extender, organic solvent and antioxidant to the reaction kettle according to the recipe, and react at a temperature of 75°C for 4 hours under normal pressure to obtain a prepolymer Polymer;

[0070](2) Chain extension reaction: Add a formulated amount of chain extender to the above prepolymer for chain extension reaction. The temperature of the chain extension reaction is 75°C, and it is carried out under normal ...

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PUM

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Abstract

The invention relates to artificial leather pulp for super-soft shoe leather. The raw material formula of the artificial leather pulp for the super-soft shoe leather consists of polyester polyol, polyether polyol, a chain extender, isocyanate, an organic solvent, a chain terminator and an antioxidant. The artificial leather pulp for the super-soft shoe leather is characterized in that the polyester polyol is poly-butanediol adipate glycol with the molecular weight of 4,000; the polyether polyol is polytetramethylene ether glycol with the molecular weight of 4,000; the chain extender is glycol; and the isocyanate is 4,4-diphenylmethane-2-isocyanate. The invention also provides a preparation method of the artificial leather pulp for the super-soft shoe leather. A proper polyester / polyether ratio is selected, so the contradiction between the softness of the resin and high wear resistance and hydrolysis resistance is solved well, the hydrolysis resistance and the wear resistance of the finished product leather are improved, and the characteristics such as softness, lightness, thinness, wear resistance and long service time, similar to high-grade goat skin, are achieved.

Description

technical field [0001] The invention relates to polyurethane and a preparation method thereof, in particular to a polyurethane resin used in shoe leather technology and a preparation method thereof. Background technique [0002] Ultra-soft shoe leather is widely used in the production of high-end leather shoes, travel shoe leather, especially high-end high-top boots for women and other high imitation soft goat leather goods. The soft shoe leather that is popular in the market now has a short service life and poor wear resistance. Or various shortcomings such as hard feeling, especially the leather surface cannot be as wear-resistant and soft as natural leather. Generally speaking, the ether bonds contained in polyether resins are better in acid and alkali resistance than the ester bonds contained in polyester resins, but the flexibility of resins is generally achieved by sacrificing hydrolysis resistance or abrasion resistance, which is easy to cause resin softness However,...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/66C08G18/42C08G18/48C08G18/12C08L75/06C08L75/08D06N3/14
Inventor 周源
Owner XUCHUAN CHEM KUNSHAN