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Polyurethane resin for shoes

A technology for polyurethane shoes and resin is applied in the field of low-density and high-foaming polyurethane shoe resin, and can solve the problems of high defect rate, white turbidity, unstable storage of liquefied diphenylmethane diisocyanate and the like

Active Publication Date: 2011-06-01
山东崇舜新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 2. Since the shoe midsole products have no physical requirements for wear resistance and bending resistance, the foaming density can be controlled to 0.3g / cm by adjusting the formula 3 -0.35g / cm 3 , and the compression ratio is maintained at 20%, but in the prior art, the phenomenon of bubble breaking on the surface of the shoe midsole product is serious, and the defective rate is high
[0013] 5. In the absence of a stabilizer in the combination material composed of diphenylmethane diisocyanate (MDI) in the raw material of polyurethane foam soles, the storage of liquefied diphenylmethane diisocyanate is very unstable, which is easy to cause the combination liquid to react. white turbidity

Method used

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  • Polyurethane resin for shoes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation of component A: Mix and stir polyester polyol, ethylene glycol, silicone oil, triamine and water at a temperature of 50-60°C for 10-15 hours to prepare component A.

[0028] Preparation of component B: Mix and stir TODI, polyester polyol, phosphoric acid and modified MDI at a temperature of 50-70° C. for 6-8 hours to prepare component B.

[0029] Component B and component A are foamed on a polyurethane foaming machine at a weight ratio of 1:0.7, injected into a mold, and demolded to obtain a shoe outsole.

[0030] The parameters of the shoe outsole product prepared according to the formula of this embodiment and the product prepared according to the existing formula are compared in the following table. (In the formula of polyurethane shoe resin, the isocyanates of component B are 3.3'-dimethyl-4.4'biphenyl diisocyanate (TODI) and diphenylmethane diisocyanate (MDI), and the rest of the components and their contents are same.)

[0031]

[0032] ...

Embodiment 2

[0035] The preparation of component A and component B and the method of foam injection molding are the same as in Example 1.

[0036] The weight ratio of component B to component A is 1:0.8.

[0037] The parameters of the shoe outsole product prepared according to the formula of this embodiment and the product prepared according to the existing formula are compared in the following table. (In the formula of polyurethane shoe resin, the isocyanates of component B are 3.3'-dimethyl-4.4'biphenyl diisocyanate (TODI) and diphenylmethane diisocyanate (MDI), and the rest of the components and their contents are same.)

[0038]

[0039] This embodiment replaces the MDI in the prior art with TODI, under the situation of equal density, the physical properties such as wear resistance, bending resistance, tensile strength, tear strength of the outsole of shoes all strengthen to some extent, prepolymer is relatively Stable, relatively mild during foaming reaction, not easy to p...

Embodiment 3

[0041] Preparation of component A: Mix and stir polyester polyol, ethylene glycol, silicone oil, triamine and water at a temperature of 50-60°C for 10-15 hours to prepare component A.

[0042] Preparation of component B: Mix and stir TODI, MDI, polyester polyol, phosphoric acid and modified MDI at a temperature of 50-70° C. for 6-8 hours to prepare component B.

[0043] Component B and component A are foamed on a polyurethane foaming machine at a weight ratio of 1:0.85, injected into a mold, and demoulded to obtain a shoe outsole.

[0044] The parameters of the shoe outsole product prepared according to the formula of this embodiment and the product prepared according to the existing formula are compared in the following table. (In the formula of polyurethane shoe resin, the isocyanates of component B are 3.3'-dimethyl-4.4'biphenyl diisocyanate (TODI) and diphenylmethane diisocyanate (MDI), and the rest of the components and their contents are same.)

[0045]

[00...

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Abstract

The invention discloses polyurethane resin for shoes, comprising a component (A) and a component (B). The polyurethane resin for shoes is characterized in that the component (A) comprises 100 parts of polyester polyol and 8-30 parts of ethylene glycol and / or butanediol, the component (B) comprises 40-60 parts of 3,3'-dimethyl-4,4' diphenyl diisocyanate and 30-45 parts of polyester polyol and / or polyether glycol. A finished product prepared by substituting TODI (3,3-Tolidine-4,4-Diisocyanate) for MDI (4,4'-Diphenylmethane Diisocyanate) through a foaming reaction has the matter properties, suchas excellent compression ratio, better wear resistance, bending resistance, tensile strength, tearing strength, and the like under low density. Because of the steric hindrance effect and the electronic effect of 3,3'-dimethyl-4,4'diphenyl diisocyanate methyl-o-side, the activity of the polyurethane resin is weaker than the activity of the diphenylmethane diisocyanate, and the prepared prepolymer is stable and mild in the foaming reaction without generating a bubble falling phenomenon. Because the activity of the TODI reaction is weaker than that of the MDI reaction, the storage stability of the isocyanate combination liquid is greatly improved.

Description

technical field [0001] The invention belongs to the field of polymer materials for shoemaking, in particular to a low-density and high-foaming polyurethane shoe resin. Background technique [0002] Polyurethane foam shoe sole raw materials are generally a combination of A component and B component, A component includes a polyol combination material, and B component includes an isocyanate combination material. A and B components are mixed and poured in the filling machine according to different combinations and different ratios, and foamed in the shoe sole mold to produce outsoles, midsoles, insoles and other products with different foam densities and different physical properties. [0003] In the prior art, component A of polyurethane shoe resin is mainly composed of polyester polybasic acid or polyether polyol mixed with foam stabilizer, crosslinking agent and water. Component B mainly includes diphenylmethane diisocyanate (MDI, 4.4'-dipheny methanediisocyanate), polyester...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/66A43B13/04A43B17/14C08G101/00
Inventor 钟文清张人方
Owner 山东崇舜新材料科技有限公司
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