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Preparation method of polycaprolactone siloxane aqueous polyurethane paint for woodenware

An ester siloxane water-based, polyurethane coating technology, applied in polyurea/polyurethane coatings, devices for coating liquid on surfaces, coatings, etc., can solve the problem of poor strength and weather resistance, water-based polyurethane wood paint adhesion fastness low problems, to achieve the effect of soft hand feeling, elimination of harmful substances, and high dry film strength

Inactive Publication Date: 2008-04-16
江阴市诺科生物新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the waterborne polyurethane wood paint prepared by the general traditional method has low adhesion fastness, poor strength and weather resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Add 70 grams of polycaprolactone (PCL1000), 20 grams of TDI, and 5 grams of silicone oil 7162 (Shanghai Heying Chemical Co., Ltd.) into the flask, react at 85°C for 1.5 hours, cool down to 70°C, and add 2.7 grams of dimethylol Propionic acid (DMPA), 6 grams of diethylene glycol, heat preservation and stirring for 30 minutes, dropwise add 5 drops of dibutyltin dilaurate, 2 grams of KH550, add 50 grams of acetone, keep warm at 60 ° C for 4.5 hours, drop to At room temperature, add 2 grams of triethylamine for neutralization, add 800 grams of deionized water, stir, and remove the acetone to obtain an environmentally friendly water-based polyurethane polycaprolactone siloxane coating for woodware.

Embodiment 2

[0018] Add 60 grams of polycaprolactone (PCL2000), 20 grams of IPDI, and 5 grams of silicone oil 7162 (Shanghai Heying Chemical Co., Ltd.) into the flask, react at 85°C for 1.5 hours, cool down to 75°C, and add 2.7 grams of dimethylol Propionic acid (DMPA), 6 grams of diethylene glycol, insulated and stirred for 30 minutes, added dropwise 5 drops of dibutyltin dilaurate, 1.5 grams of KH560, added 55 grams of acetone, kept at 60°C for 4.5 hours, and dropped to At room temperature, add 2 grams of triethylamine for neutralization, add 800 grams of deionized water, stir, and remove the acetone to obtain an environmentally friendly water-based polyurethane polycaprolactone siloxane coating for woodware.

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Abstract

The invention relates to a preparation method of poly-(epsilon-caprolactone) siloxane water-based polyurethane coating for woodenware. The coating which is mainly applied to the surfaces of woodenware and furniture is characterized in that: diisocyanate, alkyl hydroxy silicone oil and poly-(epsilon-caprolactone) are used to generate a preformed polymer with end group of -NCO, then hydrophilic monomer, coupling agent and diglycol are used to create a chain reaction, and at last deionized water is added for agitation after amine is used to neutralize a pH value and the environmental-friendly water-based polyurethane poly-(epsilon-caprolactone) siloxane coating is obtained. The coating has high strength and the paint film has no yellow stain. The invention has another characteristic that no harmful solvent volatiles during the process of spray coating, scratching and solidifying, thereby completely meeting the environmental protective technical requirements on coatings.

Description

technical field [0001] The invention relates to a preparation method of an environment-friendly polycaprolactone siloxane waterborne polyurethane coating for woodware. The coating is mainly used for the surface coating of woodware and furniture. The invention belongs to the technical field of chemical coatings. Background technique [0002] Before the present invention is made, the coating that is used for woodware, furniture as surface coating is mainly solvent type polyester or polyurethane material at present. It mainly has the following deficiencies: [0003] If the production cost is relatively high, and contains a large amount of toxic solvents such as toluene and dimethylformamide, a large amount of solvents discharged during use will seriously pollute the environment. As countries around the world pay more and more attention to environmental protection requirements, and environmental protection regulations become increasingly stringent, highly polluting solvent pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/06C09D5/02B05D7/06
Inventor 华明扬
Owner 江阴市诺科生物新材料科技有限公司