Low-VOC and double-component solvent type top finish and preparation method thereof

A two-component, solvent-based technology, applied in coatings, polyurea/polyurethane coatings, etc., can solve the problems of high VOC content and viscosity, slow drying speed, etc., achieve low construction viscosity, increase drying speed, and reduce viscosity Effect

Active Publication Date: 2018-12-11
GUANGDONG YATU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with this patent is that the VOC content and viscosity are high, and the drying speed is also slow

Method used

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  • Low-VOC and double-component solvent type top finish and preparation method thereof
  • Low-VOC and double-component solvent type top finish and preparation method thereof
  • Low-VOC and double-component solvent type top finish and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0034] According to the ratio (in parts by weight) of table 1, prepare the first component of the top paint, according to the ratio in table 2 (in parts by weight), prepare the second component of the top paint, the weight ratio of the first component and the second component is 1 :1:

[0035]

[0036] Table 1

[0037] Wherein, the drier is composed of organotin drier and fatty acid zinc in a weight ratio of 2:1. The preparation steps of fatty acid zinc are:

[0038] A1. Place the okra seeds in an oven at 60°C to dry to constant weight, take them out and crush them, pass through a 50-mesh sieve to get the okra seed powder, add the okra seed powder to 10 times the weight of petroleum ether, and put In a microwave oven with a power of 600W, extract by microwave for 10 minutes to obtain an extract, filter the extract with suction to obtain a filtrate, concentrate the filtrate under reduced pressure and dry it to a constant weight at 100°C to obtain a fatty acid;

[0039] A2...

Embodiment 1

[0040] The preparation steps of the first component of embodiment 1 are:

[0041] B1. each component is taken by weight, butyl acetate and propylene glycol methyl ether acetate are added in the stirring tank, and stirred for 4 minutes at 400 rpm;

[0042] B2. Add the wetting and dispersing agent into the stirring tank, and stir for 4 minutes at 400 rpm;

[0043] B3. Add the acrylic resin to the stirring tank, and stir for 4 minutes at 400 rpm;

[0044] B4. Add titanium dioxide and anti-sedimentation agent into the stirring tank, stir at 1400 rpm for 30 minutes until the fineness of the mixed material is lower than 15 μm, and stop stirring;

[0045] B5. Add other components into the stirring tank, and stir for 10 minutes at 400 rpm to obtain component A.

Embodiment 2

[0046] The preparation steps of the first component of embodiment 2 are different from embodiment 1: the rotating speed in steps B1, B2, B3 is 390 rev / min, and the stirring time is 5 minutes; the rotating speed in step B4 is 1390 rev / min minutes, the stirring time was 40 minutes; the rotating speed in step B5 was 390 rpm.

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Abstract

The invention provides a low-VOC and double-component solvent type top finish which is prepared from a component A and a component B with an equal weight; the component A is prepared from the following components in parts by weight: 20-40 parts of titanium dioxide, 0.5-3 parts of a wetting dispersant, 0.1-1 part of an anti-settling agent, 50-60 parts of acrylic resin, 0.1-1 part of an acrylate leveling agent, 0.05-0.3 part of an organosilicone leveling agent, 0.01-0.05 part of a drying catalyst, 1-5 parts of butyl acetate and 5-10 parts of propylene glycol monomethyl ether; and the component Bis prepared from the following components in parts by weight: 50-70 parts of isocyanate, 10-20 parts of the butyl acetate and 10-30 parts of the propylene glycol monomethyl ether. The invention alsoprovides a preparation method of the low-VOC and double-component solvent type top finish. The low-VOC and double-component solvent type top finish provided by the invention has relatively low VOC content and viscosity as well as relatively fast drying speed.

Description

technical field [0001] The invention relates to a two-component solvent-based finish paint, in particular to a low-VOC two-component solvent-based finish paint and a preparation method thereof. Background technique [0002] Solvent-based acrylic paint has excellent weather resistance and high mechanical properties, and is a type of paint that is developing rapidly at present. Solvent-based acrylic paint can be divided into self-drying acrylic paint (thermoplastic type) and cross-linked curing type acrylic paint (thermosetting type). The former belongs to non-conversion coating and the latter belongs to conversion coating. Cross-linked curing acrylic coatings are generally two-component types, mainly including acrylic amino paint, acrylic polyurethane paint, acrylic alkyd paint, radiation curing acrylic paint and other varieties, widely used in automotive coatings, electrical coatings, wood coatings, architectural coatings, etc. aspect. Cross-linked curable acrylic coatings...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D7/61C09D7/63
CPCC08K2003/2241C09D7/61C09D7/63C09D175/04C08K13/02C08K3/22C08K3/36C08K5/098
Inventor 冯兆均叶永良李远黄家俊李伟劲
Owner GUANGDONG YATU CHEM
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