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A kind of waterborne polyurethane paint and preparation method thereof

A technology of water-based polyurethane and polyurethane, which is applied in the field of paint, can solve the problems of low paint film strength, and achieve the effect of simple preparation method, strong adhesion, and improved surface adhesion

Active Publication Date: 2018-07-31
浙江裕丰新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, water-based polyurethane is used as the wood surface paint film, which has the problem of low paint film strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] In the embodiment of the present invention, a water-based polyurethane paint is composed of the following raw materials in parts by weight: 70 parts of polyurethane, 30 parts of epoxy ester, 10 parts of SAC-100 crosslinking agent, 10 parts of glycerin, 1 part of pigment, flame retardant 5 parts of agent, 20 parts of deionized water. During preparation, add SAC-100 cross-linking agent and glycerin into a beaker filled with polyurethane, add epoxy ester after completely dissolving, then transfer the solution to a three-necked flask with a reflux condenser and a mechanical stirrer, at 60 React at ℃ for 3 hours to obtain a waterborne polyurethane prepolymer, lower the temperature to 45℃, add a flame retardant to it, react for 5 hours, lower the temperature to 40℃, add pigments, react for 1.2h, then lower the temperature to 25℃ , add deionized water, stir until emulsification, and obtain water-based polyurethane paint.

Embodiment 2

[0016] In the embodiment of the present invention, a water-based polyurethane paint is composed of the following raw materials in parts by weight: 80 parts of polyurethane, 40 parts of epoxy ester, 20 parts of SAC-100 crosslinking agent, 20 parts of glycerin, 5 parts of pigment, flame retardant 10 parts of agent, 30 parts of deionized water. During preparation, SAC-100 cross-linking agent and glycerin were added to a beaker filled with polyurethane, epoxy ester was added after it was completely dissolved, and then the solution was transferred to a three-necked flask with a reflux condenser and a mechanical stirrer, at 70 React at ℃ for 2 hours to obtain a water-based polyurethane prepolymer, lower the temperature to 50℃, add a flame retardant to it, react for 3 hours, lower the temperature to 42℃, add pigments, react for 1h, then lower the temperature to 30℃, Add deionized water and stir until emulsified to obtain water-based polyurethane paint.

Embodiment 3

[0018] In the embodiment of the present invention, a water-based polyurethane paint is composed of the following raw materials in parts by weight: 73 parts of polyurethane, 33 parts of epoxy ester, 13 parts of SAC-100 crosslinking agent, 13 parts of glycerin, 2 parts of pigment, flame retardant 7 parts of agent, 23 parts of deionized water. During preparation, add SAC-100 cross-linking agent and glycerin into a beaker filled with polyurethane, add epoxy ester after it is completely dissolved, then transfer the solution to a three-neck flask with a reflux condenser and a mechanical stirrer, at 62 React at ℃ for 2.3h to obtain a water-based polyurethane prepolymer, lower the temperature to 46℃, add a flame retardant to it, react for 3.5h, lower the temperature to 41℃, add pigments, react for 1.1h, then lower the temperature to At 26°C, add deionized water and stir until emulsified to obtain a water-based polyurethane paint.

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PUM

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Abstract

The invention discloses a waterborne polyurethane paint and a preparing method thereof. The waterborne polyurethane paint is prepared from, by weight, 70-80 parts of polyurethane, 30-40 parts of epoxy ester, 10-20 parts of SAC-100 cross-linking agent, 10-20 parts of glycerol, 1-5 parts of pigment, 5-10 parts of fire retardant and 20-30 parts of deionized water. The preparing method includes the steps that the SAC-100 cross-linking agent and the glycerol are added into a beaker containing with polyurethane, the epoxy ester is added after the mixture is completely dissolved, then a solution is transferred to a three-opening bottle provided with a reflux condensing tube and a mechanical stirrer and reacted at the temperature of 60 DEG C to 70 DEG C, the temperature is reduced to 45 DEG C to 50 DEG C, the fire retardant is added, the mixture is reacted for 3 h to 5 h, the temperature is reduced to 40 DEG C to 42 DEG C, the pigment is added, the mixture is reacted for 1 h to 1.2 h, then the temperature is reduced to 25 DEG C to 30 DEG C, the deionized water is added, the mixture is stirred to be emulsified, and the waterborne polyurethane paint is obtained. The waterborne polyurethane paint has the quite good performance for all base materials, is much higher than congeneric products in performance such as wear resistance, acid resistance, alkali resistance, water resistance, oil resistance and heat resistance, the preparing method is simple, operating is easy, the environment is friendly, and the waterborne polyurethane paint is safe and nontoxic.

Description

technical field [0001] The invention relates to the field of paints, in particular to a water-based polyurethane paint and a preparation method thereof. Background technique [0002] Polyurethane (referred to as PU) is made of polyisocyanate and polyether polyol or polyester polyols or / and Small molecule Polyols, polyamines or water and other chain extenders or crosslinking agents and other raw materials polymer . By changing the type and composition of raw materials, the shape and performance of the product can be greatly changed, and the final product can be obtained from soft to hard. Polyurethane products There are soft, semi-rigid and rigid foam , elastomers (polyurethane elastomers mainly include thermoplastic TPU and thermosetting - most of them are realized by pouring process), paint coatings, adhesive , sealant, synthetic leather coating resin , elastic fibers, etc., are widely used in automobile manufacturing, refrigerator Manufacturing, transportatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D7/20C09D7/63C08G18/65C08G18/58C08G18/32C08G18/12
Inventor 吴津生
Owner 浙江裕丰新材料有限公司
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