Formula and machining process of waterborne polyurethane dispersoid

A water-based polyurethane and processing technology, which is applied in the formulation of water-based polyurethane dispersion and its processing technology, can solve the problems of long drying time, high price comparison, low resin hardness, etc., achieve high mechanical strength and bonding strength, and protect Surface Integrity, Anti-Scratch Effect

Inactive Publication Date: 2015-07-08
上海国谷化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] What needs to be pointed out in this case is that the performance of water-based polyurethane is perfect in theory, but so far, in practical application, water-based polyurethane still has many shortcomings, such as long drying time, and a considerable part of raw materials are relatively expensive, which will lead to the cost of synthetic resin. Increase, the existence of hydrophilic groups in waterborne polyurethane molecules and the shortcomings of the resin itself, such as low hardness and poor temperature resistance, affect its use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The formula and processing technology of a kind of aqueous polyurethane dispersion described in the embodiment of the present invention mainly consist of the following steps:

[0022] (1) Prepare the formula ingredients. Ingredients 1: 160 parts of polyether prepolymer, 140 parts of xylene diisocyanate, 80 parts of trimethylol propionic acid, 40 parts of tetramethylolpropane, and 5-trimethylolpropane. 15 parts of amine, 15 parts of ingredient hexaethylenediamine, 50 parts of ingredient heptahydrate;

[0023] (2) Put ingredients 1 and 2 into the reaction kettle and heat up to 60°C;

[0024] (3) Maintain the reaction at 60°C-90°C for 3 hours, then cool down to 50°C, and add ingredients 3 and 4;

[0025] (4) Heat up to 80°C, react at 80°C-90°C for 3 hours, and then take samples to judge the reaction end point (n-butylamine titration method);

[0026] (5) After the end of the reaction, add ingredient 7 to adjust the resin viscosity, and after passing the physical test, ad...

Embodiment 2

[0029] The formula and processing technology of a kind of aqueous polyurethane dispersion described in the embodiment of the present invention mainly consist of the following steps:

[0030] (1) Prepare the formula ingredients, ingredients 1 polyether prepolymer 140 parts, ingredients xylene diisocyanate 120 parts, ingredients tridimethylol propionic acid 70 parts, ingredients tetramethylolpropane 30 parts, ingredients pentatrimethylolpropane 14 parts of amine, 14 parts of ingredient hexaethylenediamine, 45 parts of ingredient heptahydrate;

[0031] (2) Put ingredients 1 and 2 into the reaction kettle and heat up to 60°C;

[0032] (3) Maintain the reaction at 60°C-90°C for 3 hours, then cool down to 50°C, and add ingredients 3 and 4;

[0033] (4) Heat up to 80°C, react at 80°C-90°C for 3 hours, and then take samples to judge the reaction end point (n-butylamine titration method);

[0034] (5) After the end of the reaction, add ingredient 7 to adjust the resin viscosity, and ...

Embodiment 3

[0037] The formula and processing technology of a kind of aqueous polyurethane dispersion described in the embodiment of the present invention mainly consist of the following steps:

[0038] (1) Prepare the formula ingredients, ingredients 1 polyether prepolymer 180 parts, ingredients xylene diisocyanate 160 parts, ingredients tridimethylol propionic acid 90 parts, ingredients tetramethylol propane 50 parts, ingredients pentatrimethylolpropane 16 parts of amine, 16 parts of ingredient hexaethylenediamine, 55 parts of ingredient heptahydrate;

[0039] (2) Put ingredients 1 and 2 into the reaction kettle and heat up to 60°C;

[0040] (3) Maintain the reaction at 60°C-90°C for 3 hours, then cool down to 50°C, and add ingredients 3 and 4;

[0041] (4) Heat up to 80°C, react at 80°C-90°C for 3 hours, and then take samples to judge the reaction end point (n-butylamine titration method);

[0042] (5) After the end of the reaction, add ingredient 7 to adjust the resin viscosity, and...

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Abstract

The invention relates to a formula and a machining process of waterborne polyurethane dispersoid. The machining process comprises the following steps: feeding a material I and a material II into a reaction kettle, heating to be 60 DEG C to react for 3 hours at 60-90 DEG C, cooling to be 50 DEG C, and adding a material III and a material IV; heating to be 80 DEG C to react for 3 hours at 80-90 DEG C, sampling, judging a reaction final point (n-butylamine titration method); after the reaction final point, adding a material VII to adjust the viscosity of resin, performing physical detection, after the product is qualified in the detection, adding a material V, and dispersing at a high speed to neutralize; adding the neutralized resin into a material VI (a chain expanding agent), uniformly stirring, filtering, and packaging. The formula and the machining process have the beneficial effects that the waterborne polyurethane dispersoid has a function of temporarily protecting the surface completeness of an article and a modification function that the article is attractive and graceful due to addition of pigment and paillettes, is non-toxic and odorless, has a function of environment protection, is good in oxidability and convenient and rapid, can be rapidly cured and molded, and can be peeled off as a whole.

Description

technical field [0001] The invention relates to a formula of a polyurethane dispersion and a processing technology thereof, in particular to a formula of a water-based polyurethane dispersion and a processing technology thereof. Background technique [0002] Polyurethane is known as the resin with the best performance. It is a polymer compound obtained by reacting compounds containing functional groups such as hydroxyl, carboxyl, and amino groups with compounds containing isocyanate groups. Polyurethane has excellent properties such as high hardness, wear resistance, strong adhesion, low film-forming temperature, and room temperature curing. However, traditional polyurethane needs to add a lot of organic solvents in the actual application process, causing serious harm to human health and the environment. With the enhancement of people's awareness of environmental protection and health, the development and application of traditional polyurethanes are limited, and polyurethane...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C08G18/66C08G18/48C08G18/34C08G18/32
Inventor 邓国荣
Owner 上海国谷化工科技有限公司
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