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Low-VOC automobile varnish and preparation method thereof

A technology for automobiles and varnishes, applied in coatings, polyurea/polyurethane coatings, etc., can solve the problems of large VOC emissions, high cost, and complex formulations, and achieve good film fullness, improved adhesion, and solid content in construction high effect

Active Publication Date: 2019-02-01
GUANGDONG YATU CHEM
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AI Technical Summary

Problems solved by technology

[0008] In order to solve the technical problems of high VOC emission, complex formula and high cost of existing high-solid and high-performance automotive varnishes, the invention provides a low-VOC automotive varnish whose construction viscosity is ≤20s / 25°C (painted 4 cups), construction solid content ≥ 80%, meet the requirements of VOC content ≤ 200g / L during construction, while the formula is simple and the film performance is high

Method used

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  • Low-VOC automobile varnish and preparation method thereof
  • Low-VOC automobile varnish and preparation method thereof
  • Low-VOC automobile varnish and preparation method thereof

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Embodiment 1～4

[0032] Embodiment 1~4, low VOC automobile varnish of the present invention and preparation thereof

[0033] As shown in Table 1 below, the weight ratio tables of 4 examples of low-VOC automotive varnishes of the present invention are listed.

[0034] Table 1

[0035]

[0036]

[0037] Preparation:

[0038]S1. Preparation of component A: According to the formula amount, put polyol resin and hyperbranched polyester polyol resin synthesized by hydroxybutyl acrylate as hydroxyl monomer into the mixing tank, put nano silicon dioxide oily liquid under stirring, stir After 10 minutes, add 3-ethoxy ethyl propionate, dimethyl nylon acid, acrylate leveling agent and dibutyltin dilaurate, and stir for another 10 minutes to obtain component A;

[0039] S2. Preparation of component B: according to the formula, put propylene glycol methyl ether acetate and dimethyl nylon acid into the mixing tank, then flush into nitrogen, put in low-viscosity aliphatic polyisocyanate resin under st...

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Abstract

The invention belongs to the technical field of coatings, and concretely relates to a low-VOC automobile varnish and a preparation method thereof. The low-VOC automobile varnish is prepared by mixinga component A with a component B according to a weight ratio of 1:1; the component A comprises 78-84% of polyol resin synthesized by using hydroxybutyl acrylate as a hydroxy monomer, 3-7% of hyperbranched polyester polyol resin, 3-6% of a nano-silica oily liquid, 4-8% of ethyl 3-ethoxypropionate, 2-6% of dimethyl nylon acid, 0.1-0.6% of a leveling agent and 0.01-0.06% of an organotin drier; and the component B includes 74-84% of a curing agent and 16-26% of a solvent. The varnish has a construction viscosity of 20 s / 25 DEG C (Tu-4 cup) or less and a construction solid content of 80% or above,meets the requirement of the VOC content being equal to or less than 200 g / L during construction, and also has the advantages of simple formula, low cost, and high performances of a paint film.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a low-VOC automotive varnish and a preparation method thereof. Background technique [0002] Since the 1980s, automotive coatings have greatly improved in terms of impact resistance, decoration, anti-corrosion agents, and aging resistance. Development, especially the development of high-performance green and environmentally friendly coatings has become an inevitable trend in the industry. [0003] In the coating system of automotive coatings, varnish is the most critical coating film for protection and decoration, which gives people an intuitive impression and determines the comprehensive performance of the composite coating of automotive repair coatings. The automotive coatings currently on the market are basically composed of polyurethane resin or acrylic resin or amino resin system or two-component polyurethane system and other main film-forming substances plus o...

Claims

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Application Information

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IPC IPC(8): C09D175/14C09D7/61C09D7/20
CPCC08K2201/011C09D175/14C09D7/20C09D7/61C08K3/36
Inventor 冯兆均谭立斌王广坤陈容爱冯嘉伟
Owner GUANGDONG YATU CHEM
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