Aqueous double-component polyurethane rubber coating, preparation thereof and use thereof

A polyurethane rubber, water-based two-component technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of flammability, explosion, incompatibility, etc., and achieve the effect of excellent adhesion

Inactive Publication Date: 2010-07-21
上海集宝材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Online spraying mostly uses electric heating at high temperature, which has the danger of flammability and explosion
The solvent-based products are dangerous goods and are not suitable for the current online spraying

Method used

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  • Aqueous double-component polyurethane rubber coating, preparation thereof and use thereof
  • Aqueous double-component polyurethane rubber coating, preparation thereof and use thereof
  • Aqueous double-component polyurethane rubber coating, preparation thereof and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The preparation process of silicone copolymer modified polyurethane emulsion is as follows: figure 1 Shown:

[0052] 1) In a sealed reactor equipped with a high-speed disperser, high-purity nitrogen protection, and a thermometer, add 200 g of polyoxypropylene glycol and 40 g of water-dispersible polyisocyanate at -5 to 15°C, stir and mix evenly;

[0053] 2) Then under the condition of high-speed dispersion and stirring, 50g of α,ω-dihydroxypropyl polysiloxane was added dropwise through the dropping funnel, and the addition was completed in about 0.5h, and then 35g of chain extender 1,4-butyl was added. Diol, stir well;

[0054] 3) Add stoichiometric water-dispersed polyisocyanate to make n(NCO):n(OH)=2.5:1 (molar ratio) in the system;

[0055] 4) Raise the system to 85~90℃ and react for 3~5 hours, add N-acyl methyl taurate sodium, alcohol ether sodium sulfate and Span-20 in weight ratio of 1:3:2 as the surface The active agent is uniformly mixed to prepare the organic silicon...

Embodiment 2

[0072] The modified waterborne polyurethane dispersion was prepared by the method of Example 1, except that the type of the surfactant was changed, and the other ratios and process conditions were the same. The appearance and film-forming stability of the coating were tested according to the GB9278-1988 and HG / T2458-1993 standards. The results are shown in Table 3:

[0073] Table 3 The effect of the types of surfactants on the coating film

[0074]

[0075]

Embodiment 3

[0077] The modified waterborne polyurethane dispersion was prepared by the method of Example 1, except that the content of the modified waterborne polyurethane dispersion in the first component was changed, and the other ratios and process conditions were the same. The appearance and film-forming stability of the coating were tested by GB9278-1988 and HG / T2458-1993 standards respectively. The results are shown in Table 4:

[0078] Table 4 The effect of modified waterborne polyurethane dispersion on the coating film

[0079]

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PUM

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Abstract

The invention provides an aqueous double-component polyurethane rubber coating, preparation thereof and use thereof. The coating comprises 61 to 95 weight parts of a component A and 3 to 10 weight parts of a component B, wherein the component A consists of 60 to 80 weight parts of a modified aqueous polyurethane dispersion and 1 to 15 weight parts of a slip agent; the component B is cross-linking curing agent. The coating has extremely high adhesivity, smoothness and wear resistance, and has high EPDM and PVC rubber substrate adhesivity, watertightness, low-high temperature resistance and flexibility. The coating can be used for coating materials of rubber products such as EPDM, TPV, PVC and TPE. Tests performed within 2 to 4 days after the coating is sprayed show that the coating can withstand more than 20,000 times of wear.

Description

Technical field [0001] The invention relates to a water-based two-component polyurethane rubber coating, which can be applied to the coating of rubber products such as EPDM, TPV, PVC, TPE and the like. Background technique [0002] At present, domestic EPDM and rubber and plastic products companies use imported coatings (Japan, the United States, Singapore, etc.), and 80% of imported coatings are solvent-based products, containing a large amount of VOC (volatile organic compounds) Such as toluene, xylene, formaldehyde, propylene glycol, etc., when discharged into the air, it directly harms the human body and seriously pollutes the atmosphere. However, operators who are exposed to the vapor of organic solvents for a long time can easily produce occupational diseases and cause great harm to society and families. And burdens have caused great aftermath costs to the factory. In addition, due to the current emphasis on energy saving and emission reduction, enterprises are actively tr...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D7/12C08G18/66C08G18/61
Inventor 华道良孔卫东
Owner 上海集宝材料科技有限公司
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