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Water-borne polyurethane synthetic leather size and preparation method and application thereof

A technology of synthetic leather pulp and water-based polyurethane, which is applied in textiles and papermaking to achieve the effects of improving impact strength, reducing costs and moderate resilience.

Inactive Publication Date: 2013-01-09
ZHANGZHOU INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to propose a method for preparing an environmentally friendly, safe, non-organic solvent-free, highly air-permeable water-based polyurethane synthetic leather slurry to solve the technical problem of compatibility between the water-based polyurethane slurry system and non-woven fabrics On the other hand, it is to reduce the purchase cost of organic solvents, reduce the production cost of enterprises, and produce films that are easy to wet on non-woven fabrics and form films on non-woven fabrics. At the same time, they have strong mechanical properties, good air permeability, Non-polluting water polyurethane synthetic leather with good hand feeling

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0056] The preparation method of described aqueous polyurethane synthetic leather slurry, described preparation method comprises the following steps:

[0057] 1) Under a nitrogen atmosphere, react diisocyanate, polyglycol and phosphoric acid in a reactor at 70-90°C under the action of a catalyst until the content of NCO isocyanate groups drops to 2%;

[0058] 2) Continue to add a hydrophilic chain extender to the reactor to extend the chain, keep warm and continue to react for 1 hour;

[0059] 3) Step 2) After the reaction is over, lower the temperature to 40~50°C and continue to add a neutralizing agent to the reaction kettle to neutralize the reaction solution. After neutralization, continue to add a small molecule chain extender or crosslinking agent, surface Active agent, continue to react at 40~50℃ for 10~15min;

[0060] 4) Step 3) After the reaction is over, add deionized water under rapid stirring to stir and emulsify evenly. After emulsifying evenly, continue to add f...

Embodiment 1

[0062] The preparation method of aqueous polyurethane synthetic leather slurry comprises the following steps:

[0063] 1) First take each component by the following parts by weight;

[0064] 5 parts diphenylmethane diisocyanate (MDI)

[0065] Toluene diisocyanate (TDI) 5 parts:

[0066] 10 parts of polyethylene glycol;

[0067] 5 parts of polypropylene glycol;

[0068] 5 parts of polyethylene adipate glycol;

[0069] 10 parts of polypropylene adipate;

[0070] Phosphoric acid 0.006 part;

[0071] 0.01 part of dibutyltin dilaurate;

[0072] 0.04 parts of dimethylolbutyric acid;

[0073] 0.04 parts of 1,2-diamino-β-propanesulfonate;

[0074] Sodium hydroxide 0.008 part;

[0075] Hexamethylenediamine 0.07 part;

[0076] Sodium alkylbenzene sulfonate 0.01 part;

[0077] 0.01 part of sodium alkyl polyoxyethylene ether sulfate;

[0078] 20 parts of deionized water;

[0079] 8 parts wood flour;

[0080] 0.1 parts of titanium dioxide;

[0081] 0.05 part of phthalocyanin...

Embodiment 2

[0088] The preparation method of aqueous polyurethane synthetic leather slurry comprises the following steps:

[0089] 1) First take each component by the following parts by weight;

[0090] 5 parts of isophorone diisocyanate (IPDI);

[0091] Hexamethylene diisocyanate (HDI) 5 parts;

[0092] 10 parts of polytetrahydrofuran diol;

[0093] 10 parts of polyoxytetramethylene glycol;

[0094] 10 parts of polybutylene adipate;

[0095] 20 parts of polyhexamethylene adipate;

[0096] Phosphoric acid 0.007 parts;

[0097] 0.1 part of stannous octoate;

[0098] Ethylenedihydroxyethanesulfonate 0.01 part;

[0099] 0.009 parts of sodium carbonate;

[0100] Hexamethylenediamine 0.02 part;

[0101] Ethylenediamine 0.01 part;

[0102] 0.02 part of sodium alkylsulfonate;

[0103] 0.02 part of sodium alkyl polyoxyethylene ether carboxylate;

[0104] 60 parts of deionized water;

[0105] 30 parts of light calcium carbonate;

[0106] Phthalocyanine pigment 0.1 part;

[0107] Dib...

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Abstract

The invention discloses a water-borne polyurethane synthetic leather size and a preparation method and an application thereof. The water-borne polyurethane synthetic leather size comprises diisocyanate, poly dibasic alcohol, phosphoric acids, catalysts, hydrophilic chain extenders, neutralizers, small molecule chain extenders or cross-linking agents, surface active agents and the like. The preparation method of the water-borne polyurethane synthetic leather size includes (1) polymerizing the diisocyanate, the poly dibasic alcohol and the phosphoric acids under the action of the catalysts; (2) adding the hydrophilic chain extenders for chain extension; (3) cooling and neutralizing a reaction solution, and continuing the reaction by adding the small molecule chain extenders or cross-linking agents and the surface active agents; and (4) emulsifying and adding auxiliaries to uniformly stir. According to the water-borne polyurethane synthetic leather size and the preparation method and the application thereof, the phosphoric acids are added in the formula, the wettability of the ultimately prepared synthetic leather size and non-woven fabrics is improved, further the process for preparing the synthetic leather can be simplified, properties of the prepared synthetic leather are improved, simultaneously the feed ratio of the diisocyanate and the poly dibasic alcohol is strictly controlled, and the ultimately prepared synthetic leather has the advantages that the peel strength and the hand feeling are good, and the rebound resilience is moderate.

Description

technical field [0001] The invention relates to a water-based polyurethane synthetic leather slurry, a preparation method of the water-based polyurethane synthetic leather slurry, and a preparation method and application of the water-based polyurethane synthetic leather slurry for synthesizing polyurethane synthetic leather. Background technique [0002] Polyurethane synthetic leather was produced in the late 1970s and developed in the 1990s. In the traditional production process of polyurethane synthetic leather, organic solvent polyurethane resin is used as its basic raw material. This type of polyurethane resin uses dimethylformamide, butanone, xylene, toluene, acetone, ethyl acetate, etc. The main solvent is obtained by solvent polymerization. These organic solvents, which account for more than 60% of the entire resin composition, have large toxic and side effects, not only cause environmental pollution, endanger the health of operators, but also are flammable and explo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/42C08K13/02C08K5/521C08L75/06C08L75/08D06N3/14
Inventor 陈建福黄慧珍林祥福苏火煌
Owner ZHANGZHOU INST OF TECH
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