Water-borne polyurethane not containing organic tin and preparation method thereof

A technology of water-based polyurethane and organotin, which is applied in the field of synthesis of new polymer materials, can solve the problems of less crosslinking, unsatisfactory, low thermal decomposition temperature, etc., and achieve good hydrolysis resistance, increased heat resistance, and good main structure Effect

Inactive Publication Date: 2017-12-08
HANGZHOU JIHUA POLYMER MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main molecular chain of water-based polyurethane contains repeated carbamate group (-NHCOO-) structural units, and the initial thermal decomposition temperature of carbamate bond is relatively low, which is 140-160°C; plus the molecular structure of water-based polyurethane Most of them are linear and less cross-linked; therefore, the heat resistance of water-based polyurethane is generally poor at

Method used

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  • Water-borne polyurethane not containing organic tin and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0036] An organotin-free waterborne polyurethane, made of the following components in parts by weight: 25 parts of phthalic anhydride polyester polyol with a molecular weight of 1000, 10 parts of toluene diisocyanate, and 5 parts of hydroxypropyl silicone oil with a molecular weight of 1000 Blocked methyl phenylsiloxane, 0.015 parts organozinc catalyst, 2 parts 2,2-dimethylolpropionic acid, 2 parts ethylenediamine, 5 parts acetone, and 2 parts triethylamine.

[0037] The preparation method of the water-based polyurethane includes the following steps:

[0038] 1) Add 25 parts of phthalic anhydride polyester polyol with a molecular weight of 1000 and 5 parts of hydroxypropyl silicone oil-terminated methyl phenylsiloxane with a molecular weight of 1000 into the reaction flask, distill under reduced pressure at 100°C for 30 minutes, and cool to 50 ℃, add 10 parts of toluene diisocyanate and 0.015 parts of organic zinc, heat up to 70℃ and react for 4 hours;

[0039] 2) Cool down to 50°C,...

Embodiment 2

[0042] An organic tin-free waterborne polyurethane, which is made of the following components in parts by weight: 80 parts of p-phenylene polyester polyol with a molecular weight of 3000, 20 parts of diphenylmethane diisocyanate, and 20 parts of a molecular weight of 3000 Hydroxybutyl silicone oil-terminated methylphenylsiloxane, 0.06 parts of organic bismuth catalyst, 10 parts of 2,2-dimethylolbutanoic acid, 10 parts of isophorone diamine, 10 parts of methyl ethyl ketone, and 10 parts of three Ethanolamine.

[0043] The preparation method of the water-based polyurethane includes the following steps:

[0044] 1) Add 80 parts of p-phenylene polyester polyol with a molecular weight of 3000 and 20 parts of hydroxybutyl silicone oil-terminated methyl phenylsiloxane with a molecular weight of 3000 into the reaction flask, and distill under reduced pressure at 100°C for 60 minutes, and cool to At 60°C, add 20 parts of diphenylmethane diisocyanate and 0.06 parts of organic bismuth, and r...

Embodiment 3

[0048] An organic tin-free waterborne polyurethane, which is made of the following components in parts by weight: 40 parts of phthalic anhydride polyester polyol with a molecular weight of 5000, 20 parts of hexamethylene diisocyanate, and 10 parts of hydroxyl with a molecular weight of 5000 Propyl silicone oil-terminated methylphenylsiloxane, 0.03 parts of organic bismuth catalyst, 5 parts of 2,2-dimethylolpropionic acid, 5 parts of diethylenetriamine, 8 parts of tetrahydrofuran and 10 parts of ammonia.

[0049] The preparation method of the water-based polyurethane includes the following steps:

[0050] (1) Add 40 parts of phthalic anhydride polyester polyol with a molecular weight of 5000 and 10 parts of hydroxypropyl silicone oil-terminated methyl phenylsiloxane with a molecular weight of 5000 into the reaction flask, and distill under reduced pressure at 100°C for 60 minutes, and cool to At 60°C, add 20 parts of hexamethylene diisocyanate and 0.03 parts of organic bismuth, and ...

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Abstract

The invention discloses a water-borne polyurethane not containing organic tin. The water-borne polyurethane is prepared from the following components in parts by weight: 25 to 80 parts of aromatic polyester polyol, 10 to 20 parts of diisocyanate, 10 to 40 parts of hydroxyalkyl-terminated methyl phenyl polysiloxane, 0.015 to 0.06 part of catalyst, 2 to 10 parts of hydrophilic chain-extending agent, 2 to 10 parts of amine chain-extending agent, 5 to 10 parts of solvent and 2 to 5 parts of salt forming agent, wherein the catalyst is selected from one or two of organic bismuth, organic zinc or organic zirconium. The water-borne polyurethane has the advantages that the hydrophilic chain-extending agent and the hydroxyalkyl-terminated methyl phenyl polysiloxane are used as main polymerizing monomers, so that the hydrolysis-resistant property and heat-resistant property are better; the water-borne polyurethane is more suitable for application environments with complicated water system; the water-borne polyurethane does not contain the organic tin catalyst, so that the more environment-friendly property is realized.

Description

Technical field [0001] The invention relates to the technical field of synthesis of new polymer materials, in particular to a waterborne polyurethane free of organotin and a preparation method thereof. Background technique [0002] Waterborne polyurethane is a binary colloidal system formed by dissolving or dispersing polyurethane resin in water with water as the dispersion medium. It has the advantages of low pollution, non-flammable, energy-saving, hard to damage the painted surface, good working environment, and easy to clean. It also has excellent flexibility, abrasion resistance, low temperature resistance and other excellent properties of solvent-based polyurethane coatings, so it has a broad field in wood coatings, automotive coatings, architectural coatings, plastic coatings, paper coatings, and textile and leather coatings. Application prospects. With the increasing awareness of people's environmental protection and the establishment and strengthening of national safety...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/42C08G18/61C08G18/32C08G18/10C08G18/34C08G18/22
Inventor 钱涛刘海龙罗文秀
Owner HANGZHOU JIHUA POLYMER MATERIAL CO LTD
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