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Environmental-friendly PU (Polyurethane) resin and environmental-friendly PU leather prepared therefrom and method for preparing PU leather

A kind of PU resin, environment-friendly technology, applied in the field of environment-friendly PU resin, environment-friendly PU leather and a kind of PU leather preparation field which is conducive to the complete volatilization of organic solvent, can solve the problems of unfavorable practical operation, high TVOC content and high production cost, achieve the effect of ensuring solubility

Active Publication Date: 2011-02-16
浙江昶丰新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For this reason, the first technical problem to be solved by the present invention is that the organic solvent used when synthesizing PU resin in the prior art is highly toxic or has a high boiling point, which cannot meet environmental protection requirements and is unfavorable for actual operation, thereby providing a kind of non-toxic Eco-friendly PU resin that contains toxic solvents and is easy to handle
[0005] The second technical problem to be solved by the present invention is that in the prior art, when producing PU leather, organic solvents with high toxicity and high price are used to dissolve PU resin, which cannot meet the requirements of environmental protection and have high production costs. A kind of environmentally friendly PU leather without toxic solvents and low price
[0006] The third technical problem to be solved by the present invention is that the preparation process of PU leather in the prior art affects the surface quality of the product and is not conducive to the complete volatilization of organic solvents, resulting in residual organic solvents on the product PU leather and high TVOC content.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The environment-friendly PU leather using the environment-friendly PU resin as a raw material includes a surface layer, a middle layer and a bottom layer, and the raw materials of the PU resin in the surface layer are 10% polytetrahydrofurfuryl ether glycol, 8% di Isocyanate, 32% dimethyl sulfoxide, 50% dimethyl carbonate; the surface layer PU resin, 50% dimethyl carbonate, and 10% toner mixed in 40% by mass percentage to obtain a surface layer composition.

[0026] The raw material of PU resin in the middle layer is 15% polytetrahydrofurfuryl ether glycol, 8% diisocyanate, 27% dimethyl sulfoxide, 50% dimethyl carbonate by mass percent; account for 50% by mass percent % of the middle layer PU resin, 42% dimethyl carbonate, and 8% toner are mixed to obtain the middle layer raw material composition.

[0027] The raw materials of the PU resin in the bottom layer are 16% polytetrahydrofurfuryl ether glycol, 22% diisocyanate, 32% dimethyl sulfoxide, and 30% dimethyl carbona...

Embodiment 2

[0030] The environment-friendly PU leather using the environment-friendly PU resin as a raw material includes a surface layer, a middle layer and a bottom layer. The raw materials of the PU resin in the surface layer are 30% polycarbonate polyol, 35% diisocyanate, and 5% by mass percentage. % dimethyl sulfoxide, 30% dimethyl carbonate; the surface layer PU resin, 50% dimethyl carbonate, and 10% black pigment are mixed in a mass percentage of 40% to obtain a surface layer raw material combination thing.

[0031] The raw material of PU resin in the middle layer is 35% polycarbonate polyol, 25% diisocyanate, 5% dimethyl sulfoxide, 35% dimethyl carbonate by mass percent; The middle layer PU resin, 42% dimethyl carbonate, and 8% black pigment are mixed to obtain the middle layer raw material composition.

[0032] The raw material of PU resin in the bottom layer is 38% polycarbonate polyol, 5% diisocyanate, 35% dimethyl sulfoxide, 22% dimethyl carbonate by mass percent; The bottom...

Embodiment 3

[0035] The environment-friendly PU leather using the environment-friendly PU resin as raw material includes a surface layer, a middle layer and a bottom layer, and the raw materials of the PU resin in the surface layer are 15% polyether polyester grafted copolyol, 22% Diisocyanate, 55% dimethyl sulfoxide, 8% dimethyl carbonate; the surface layer PU resin, 50% dimethyl carbonate, and 10% toner mixed in 40% by mass percentage to obtain Topping material composition.

[0036] The raw material of PU resin in the middle layer is 20% polyether polyester graft copolyol, 17% diisocyanate, 55% dimethyl sulfoxide, 8% dimethyl carbonate by mass percent; 50% of the middle layer PU resin, 42% of dimethyl carbonate, and 8% of toner are mixed to obtain the middle layer raw material composition.

[0037] The raw materials of the PU resin in the bottom layer are 38% polyether polyester grafted copolyol, 22% diisocyanate, 10% dimethyl sulfoxide, and 30% dimethyl carbonate by mass percentage. T...

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PUM

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Abstract

The invention relates to an environmental-friendly PU (Polyurethane) resin, which comprises oilgomer polyols, diisocyanate, dimethyl sulfoxide and dimethyl carbonate. The invention also relates to environmental-friendly PU leather using the environmental-friendly PU resin as a raw material. The environmental-friendly PU leather comprises a surface layer, a middle layer and a bottom layer, and each layer comprises the following raw materials in percentage by mass: 40-60% of PU resin, 2-10% of toner and 30-50% of solvent. The invention also relates to a method for preparing the environmental-friendly PU leather. The method comprises the steps of: coating a raw material composition of the surface layer on a piece of release paper, drying and cooling; coating a raw material composition of themiddle layer on the surface layer, drying and cooling; coating a raw material composition of the bottom layer on the middle layer, binding the middle layer with bottom cloth, drying and cooling; and stripping the release paper, and drying again. The invention solves the technical problems of high toxicity of organic solvents in the PU resin, residue of toxic organic solvent in a finished PU leather product, and overhigh TVOC (Total Volatile Organic Compound) content in the prior art. The method is particularly suitable for producing the environmental-friendly PU resin and the environmental-friendly PU leather.

Description

technical field [0001] The present invention relates to an environment-friendly polyurethane resin, that is, an environment-friendly PU resin, and the prepared environment-friendly PU leather and a preparation method of the PU leather, in particular to an environment-friendly PU resin without toxic solvents, an environment-friendly PU leather and a The preparation method of PU leather is beneficial to the complete volatilization of organic solvents. Background technique [0002] At present, in the production process of domestic synthetic PU leather, when solvent-based PU resin is used as the basic raw material for producing leather products, the PU resin passes through toluene, xylene, acetone, methyl ethyl ketone (MEK), ethyl acetate and dimethylformamide. (DMF) etc. are used as the main solvent to carry out the solvent polymerization method to make, wherein toxic solvents such as DMF, methyl ethyl ketone have very big harm to operator's health, pollute environment seriousl...

Claims

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Application Information

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IPC IPC(8): B32B27/40C08G18/48C08G18/64C08G18/72B32B27/18C08G18/44
Inventor 邵晨旭
Owner 浙江昶丰新材料有限公司
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