Waterborne polyurethane polyamide resin emulsion for metal surface coating and preparation method thereof

A technology of polyurethane polyamide and polyamide resin, which is applied in the direction of polyurea/polyurethane coatings and coatings, and can solve the problems of environmental unfriendliness, hardness, solvent resistance, hydrolysis resistance, acid and alkali resistance, salt spray resistance, etc. High-end products are expensive and other issues, to achieve the effect of low cost of use and good economic benefits

Active Publication Date: 2016-09-07
ANQING HAOYE WATER PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, high-end metal coatings are basically solvent-based. Solvent-based coatings are not friendly to the environment. Water-based coatings are environmentally friendly and energy-saving. There are deficiencies in performance such as salt spray, and foreign high-end products are expensive

Method used

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  • Waterborne polyurethane polyamide resin emulsion for metal surface coating and preparation method thereof
  • Waterborne polyurethane polyamide resin emulsion for metal surface coating and preparation method thereof
  • Waterborne polyurethane polyamide resin emulsion for metal surface coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The preparation of embodiment 1-polyamide resin polyol

[0019] The preparation raw materials are: 40 grams of sebacic acid, 35 grams of adipic acid, 60 grams of dibasic acid, 15 grams of hexamethylenediamine, 10 grams of 1,2 cyclohexanediamine, 40 grams of isopropanolamine, 30 milliliters of pyrrolidone, and Triphenyl phosphate 0.5 g.

[0020] First add sebacic acid, dibasic acid and adipic acid into the reactor, then add hexamethylenediamine and 1,2 cyclohexanediamine at 140°C, react for 3h, then raise the temperature to 180°C, dehydrate for 30min, cool down to 130°C °C, add isopropanolamine and triphenyl phosphite at the same time, react for 3 hours, add solvent pyrrolidone during the reaction to control the reaction viscosity. Then raise the temperature for dehydration for 30 minutes, and when the dehydration is completed, raise the temperature to 200° C. and vacuumize at the same time to remove unreacted monomers and solvents. After 1 h, the reaction was complete...

Embodiment 2

[0021] The preparation of embodiment 2-polyamide resin polyol

[0022] The preparation raw materials are: 50 grams of sebacic acid, 40 grams of adipic acid, 70 grams of dibasic acid, 30 grams of hexamethylenediamine, 35 grams of isopropanolamine, 10 grams of ethanolamine, 40 milliliters of pyrrolidone, and 0.5 grams of triphenyl phosphite .

[0023] Add sebacic acid, dibasic acid and adipic acid to the reactor first, add hexamethylenediamine at 140°C, control the reaction temperature, react for 3 hours, raise the temperature to 180°C, dehydrate for 30min, cool down to 130°C, add isopropanolamine , ethanolamine and triphenyl phosphite, react for 3h, and control the reaction viscosity by adding pyrrolidone. Raise the temperature to 190°C for dehydration, then raise the temperature to 200°C after 30 minutes, vacuumize for 1 hour, the reaction ends, and the product is a light orange viscous liquid (molecular weight is about 2000).

Embodiment 3

[0024] The preparation of embodiment 3-metal surface coating waterborne polyurethane polyamide resin emulsion

[0025] The preparation raw materials are: 75g of polyamide resin polyol prepared in Example 1, 20g of polytetrahydrofuran, 10g of amino silicone oil, 70g of isophorone diisocyanate, 0.5g of organic bismuth, 10g of 1,4-butanediol, dimethylolpropane 12g of acid, 8g of diethylenetriamine and an appropriate amount of solvent (to adjust the viscosity of the reaction system, such as pyrrolidone, etc.).

[0026] Mix polyamide resin polyol, polytetrahydrofuran, amino silicone oil, isophorone diisocyanate and organic bismuth and heat up to 80°C for 2 hours, then add 1,4 butanediol and dimethylol propionic acid for 4 hours During the reaction process, add solvent to control the viscosity, then cool to 45°C, emulsify, add diethylenetriamine to continue the reaction for 1 hour, and the obtained product is a light yellow translucent emulsion.

[0027] The metal surface coating w...

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Abstract

The invention relates to waterborne polyurethane polyamide resin emulsion for a metal surface coating and a preparation method of the emulsion. The emulsion is prepared from the following components in parts by weight: 70-85 parts of polyamide resin polyalcohol, 15-30 parts of polytetrahydrofuran, 5-25 parts of amino silicon oil, 65-85 parts of isophorone diisocyanate, 0.5 part of organic bismuth, 5-15 parts of 1,4-butanediol, 10-15 parts of dimethylolpropionic acid, 5-10 parts of diethylenetriamine and a proper amount of a solvent. The preparation method comprises the following steps: mixing polyamide resin polyalcohol, polytetrahydrofuran, amino silicon oil, isophorone diisocyanate and organic bismuth, heating for reaction, adding 1,4-butanediol and dimethylolpropionic acid for reaction, adding the solvent during the reaction to control the viscosity, cooling, emulsifying, and adding diethylenetriamine for continuous reaction. The emulsion can be applied to a metal surface, is equivalent to an overseas similar product in performance, is much cheaper than the overseas similar product sold in China, has relatively good market prospects, and can bring relatively good economic benefits to production enterprises.

Description

technical field [0001] The invention relates to a water-based polyurethane polyamide resin emulsion for metal surface coating and a preparation method thereof. Background technique [0002] At present, high-end metal coatings are basically solvent-based. Solvent-based coatings are not friendly to the environment. Water-based coatings are environmentally friendly and energy-saving. There are deficiencies in performance such as salt spray, and foreign high-end products are expensive Contents of the invention [0003] In order to solve the technical problems in the prior art, one of the objectives of the present invention is to provide a water-based polyurethane polyamide resin emulsion with superior performance for metal surface coatings. In order to realize this object, the technical scheme adopted in the present invention is: [0004] A water-based polyurethane polyamide resin emulsion for metal surface coatings, made of the following raw materials in parts by weight: ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/75C08G18/60C08G18/48C08G18/61C08G18/34C08G18/32C08G18/44C08G18/76C09D175/04
CPCC08G18/3206C08G18/3228C08G18/3271C08G18/348C08G18/44C08G18/4854C08G18/603C08G18/61C08G18/6607C08G18/6611C08G18/6618C08G18/6622C08G18/6625C08G18/6674C08G18/6685C08G18/6692C08G18/755C08G18/7671C09D175/04
Inventor 李传宏操昭云黎群李颖陈桂斌
Owner ANQING HAOYE WATER PAINT
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