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Synthesis technology of single-component water-based polyurethane finishing agent

A water-based polyurethane and synthetic process technology, applied in polyurea/polyurethane coatings, coatings, animal husbandry, etc., can solve problems such as inconvenience and waste, and achieve the effect of simplifying application process and low production cost

Active Publication Date: 2011-05-11
温州市登达化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the products in use in the domestic market are two-component finishing agents, including two-component A and B, wherein component A is water-based polyurethane, and component B is polyisocyanate crosslinking agent. When this two-component leather finishing agent is used , requires the manufacturer’s technicians to prepare and use it immediately, and requires the prepared slurry to be used up within 6 hours, otherwise the agglomeration cannot be used again, resulting in waste, so this commercially available two-component leather finishing agent is inconvenient to use Problem, in addition, through retrieval, Chinese Patent Publication No. CN1067442A discloses a kind of "production method of two-component polyurethane leather finishing agent", but this two-component polyurethane leather finishing agent also needs to carry out two-component configuration, use still inconvenient

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Add 10 parts of polyester diol, 10 parts of polyether triol, 15 parts of toluene diisocyanate and 0.2 part of catalyst in a dry reactor equipped with a stirrer, thermometer and reflux condenser, and then heat up to Reaction at 50°C. The catalyst is triethylenediamine.

[0016] (2) When the isocyanate group content reaches the theoretical value, add 3 parts of chain extender (1,4-butanediol), keep the above temperature to continue the reaction, chain extension and modification to obtain prepolymer.

[0017] (3) When the content of isocyanate groups reaches the theoretical value, add 0.5 parts of dihydroxypropionic acid and 1 part of crosslinking agent for crosslinking reaction, react for a period of time, cool down to 40 °C, add 0.3 parts of organic amine and 100 parts of distilled water, Stirring reaction is continued at 40°C to carry out neutralization and emulsification, so as to obtain the finished product of one-component waterborne polyurethane leather finishi...

Embodiment 2

[0019] (1) Add 35 parts of polyester diol, 28 parts of polyether triol, 50 parts of toluene diisocyanate and 1.2 parts of catalyst in a dry reactor equipped with a stirrer, thermometer and reflux condenser, and then heat up to Reaction at 80°C. The catalyst is acetate.

[0020] (2) When the isocyanate group content reaches the theoretical value, add 15 parts of chain extender 1,4-butanediol, keep the above temperature to continue the reaction, chain extension and modification to obtain a prepolymer.

[0021] (3) When the isocyanate group content reaches the theoretical value, add 7 parts of dihydroxypropionic acid and 5 parts of crosslinking agent for crosslinking reaction, react for a period of time, cool down to 40 ° C, add 5 parts of organic amine and 100 parts of distilled water, Stirring reaction is continued at 60°C to carry out neutralization and emulsification, so as to obtain the finished product of one-component waterborne polyurethane leather finishing agent.

Embodiment 3

[0023] (1) Add 27 parts of polyester diol, 18 parts of polyether triol, 25 parts of toluene diisocyanate and 0.8 part of catalyst in a dry reaction kettle equipped with a stirrer, thermometer and reflux condenser, and then heat up to Reaction at 60°C. The catalyst is stannous octoate.

[0024] (2) When the isocyanate group content reaches the theoretical value, add 8 parts of chain extender 1,4-butanediol, keep the above temperature to continue the reaction, chain extension and modification to obtain prepolymer.

[0025] (3) When the content of isocyanate groups reaches the theoretical value, add 4 parts of dihydroxypropionic acid and 3 parts of crosslinking agent for crosslinking reaction, react for a period of time, cool down to 40 °C, add 3.5 parts of organic amine and 100 parts of distilled water, Stirring reaction is continued at 50°C to carry out neutralization and emulsification, so as to obtain the finished product of one-component waterborne polyurethane leather fini...

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PUM

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Abstract

The invention discloses a synthesis technology of single-component water-based polyurethane finishing agent, which is characterized in that polyether glycol, toluene diisocyanate, cross-linking agent and the like are taken as the main row material and are prepared into stable self cross-linking and self-emulsifying type -component water-based polyurethane finishing agent through prepolymerization, chain propagation, quaternization, emulsification and the like. By adopting the invention, the film is water-resistant and has good the heat resistance, and the coating is abrasion and dry resistant and has good wet rubbing fastness, so that the finishing requirements of high-grade leather such as sofa leather and the like can be satisfied.

Description

technical field [0001] The invention relates to a synthesis process of chemical products, in particular to a synthesis process of a single-component high-performance water-based polyurethane finishing agent. Background technique [0002] Polyurethane finishing agents are used to beautify the surface of shoe soles, improve durability, correct surface defects, and increase commercial value. At present, the products in use in the domestic market are two-component finishing agents, including two-component A and B, wherein component A is water-based polyurethane, and component B is polyisocyanate crosslinking agent. When this two-component leather finishing agent is used , requires the manufacturer’s technicians to prepare and use it immediately, and requires the prepared slurry to be used up within 6 hours, otherwise the agglomeration cannot be reused, resulting in waste. Therefore, this commercially available two-component leather finishing agent is inconvenient to use Problem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/42C09D175/06C09D175/08C14C11/00
Inventor 蔡福泉田志胜
Owner 温州市登达化工有限公司
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