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Two-component water-based finish paint based on oily polyisocyanate curing agent and preparation method thereof

A technology of polyisocyanate and water-based topcoat, which is applied in biocide-containing paints, polyurea/polyurethane coatings, anti-fouling/underwater coatings, etc., and can solve the problems of poor weather resistance and water resistance of paint films and high cost of water-based coatings problem, to achieve the effects of less environmental pollution, low VOC, and low odor

Inactive Publication Date: 2020-08-07
QINGYUAN SHICHUANG COATING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the high cost of water-based coatings in the prior art, the defects or deficiencies of poor weather resistance and water resistance of the paint film, and provide a two-component water-based topcoat based on oily polyisocyanate curing agent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0082] The following specific implementation methods are all carried out according to the following steps:

[0083] (1) Preparation of component A:

[0084] S1. Add the water-based hydroxyacrylic acid dispersion into the mobile tank according to the formula ratio, start the disperser to control the stirring speed at 200-800rpm, continue to slowly add some film-forming aids under stirring, and continue stirring for 20-30min;

[0085] S2. Continue to slowly add water-based leveling agent, base material wetting agent, anti-explosion foam additive, Shichuang self-made resin-free grinding color paste, thickener, etc., the feeding time interval of each material is 5-10 minutes, and continue to stir for 20-30 minutes ;

[0086] S3. Uniformly disperse the premixture of the light stabilizer and part of the film-forming aid, then slowly add it into the moving tank, and continue to stir for 20-30 minutes;

[0087] S4. Add distilled water into the mobile tank, and continue to stir for 2...

Embodiment 1

[0092]The present embodiment provides a kind of two-component water-based finish paint based on oily polyisocyanate curing agent, and its composition (mass fraction) is as follows:

[0093] The proportion of water-based hydroxyacrylic acid dispersion AQUAPAC-8249 is 50%, the proportion of coalescence aid DPM is 1.45% (1% is added in S1 step, 0.45% is added in S3 step), and the proportion of coalescence aid BCS is 1.45% (S1 Add 1% in step, add 0.45% in step S3), leveling agent BYK-333 and MODAREZ PW336 accounted for 0.2% and 0.4% respectively, substrate wetting agent BYK-348 and SURFYNOL 104BC accounted for 0.2% and 0.6% respectively %, light stabilizers Tinuvin 1130 and Tinuvin 292 accounted for 0.3% and 0.6% respectively, anti-explosion additive BYKETOL-AQ accounted for 1%, white pulp Colanyl White TQ 100 accounted for 25%, thickener ASE- 60 and Reholate 299 accounted for 0.2% and 0.4% respectively, the pH regulator DMEA accounted for 0.3%, the bactericide Zn-50 solution acco...

Embodiment 2

[0096] The present embodiment provides a kind of two-component water-based finish paint based on oily polyisocyanate curing agent, and its composition (mass fraction) is as follows:

[0097] The proportion of water-based hydroxyacrylic acid dispersion AQUAPAC-8249 is 50%, the proportion of coalescence aid DPM is 1.45% (1% is added in S1 step, 0.45% is added in S3 step), and the proportion of coalescence aid BCS is 1.45% (S1 Add 1% in step, add 0.45% in step S3), leveling agent BYK-333 and MODAREZ PW336 accounted for 0.2% and 0.4% respectively, substrate wetting agent BYK-348 and SURFYNOL 104BC accounted for 0.2% and 0.6% respectively %, light stabilizers Tinuvin 1130 and Tinuvin 292 accounted for 0.3% and 0.6% respectively, anti-explosion additive BYKETOL-AQ accounted for 1%, white pulp Colanyl White TQ 100 accounted for 25%, thickener ASE- 60 and Reholate 299 accounted for 0.2% and 0.4% respectively, the pH regulator DMEA accounted for 0.3%, the fungicide Zn-50 accounted for ...

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Abstract

The invention relates to a two-component water-based finish paint based on an oily polyisocyanate curing agent and a preparation method thereof. The two-component water-based finish paint is composedof a component A and a component B, wherein the component A is prepared from a water-based hydroxyl acrylic acid dispersion, a coalescing agent, a leveling agent, a base material wetting agent, a light stabilizer, an anti-blistering additive, color paste, a thickener, a pH regulator, a bactericide and water; and the component B consists of an oily polyisocyanate curing agent and a cosolvent. According to the invention, the water-based hydroxyl acrylic acid dispersion is selected as the water-based resin, and the oil-based polyisocyanate curing agent with low price, longer activation period, higher foaming limit and better constructability is selected as the curing agent, so that the obtained two-component water-based finish paint is low in cost; and the paint film has the advantages of high gloss, favorable weather resistance, favorable water resistance, low VOC content and no pungent smell, and can be widely popularized and applied.

Description

technical field [0001] The invention belongs to the technical field of environment-friendly water-based coatings, and more specifically relates to a two-component water-based topcoat based on an oily polyisocyanate curing agent and a preparation method thereof. Background technique [0002] Polyurethane is the focus of research because of its excellent properties (hardness, flexibility, abrasion resistance, chemical resistance, adhesion, stone impact resistance, etc.). Traditional solvent-based polyurethane coatings use a large amount of organic solvents as diluents during use, which will generate a large amount of VOC and pollute the environment. With the enhancement of people's awareness of environmental protection and the drive of national policies, water-based coatings are becoming more and more popular in the market. Water-based two-component polyurethane retains the high performance of the traditional solvent-based polyurethane system, and greatly reduces VOC, so its ...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D5/14C09D7/20C08G18/62
CPCC08G18/6229C09D5/14C09D175/04C09D7/20
Inventor 付长欣何世祺蔡心怡黄成河王俊鸿林伟文王侃锋
Owner QINGYUAN SHICHUANG COATING TECH CO LTD
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