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Coating composition and application of coating composition to metal base material

A composition and coating technology, applied in the direction of polyester coatings, coatings, etc., can solve the problems of low solid content, limited space for adjustment and improvement of coating performance, large molecular weight, etc., and achieve the effect of reducing waste

Active Publication Date: 2013-01-02
HANGZHOU CPMC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since there are very few acrylic resins that can be used in food contact coatings on the market, the space for adjusting and improving coating properties is limited, and in order to comply with food contact regulations, the acrylic resins used in the above-mentioned patents have a relatively high molecular weight, which leads to solids in the final coating product. The proportion is not high, and more organic solvents are needed to dilute and disperse

Method used

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  • Coating composition and application of coating composition to metal base material
  • Coating composition and application of coating composition to metal base material
  • Coating composition and application of coating composition to metal base material

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Experimental program
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Embodiment 1-9

[0041] The raw material components and component contents are shown in Table 2-10, wherein the percentage is the weight percentage of each component actually added, not based on the dry weight of the component. Table 1 is the proportion of epoxy phenolic coatings, only for comparison. First add PVC to the solvent to disperse at high speed. Due to frictional heat, the temperature will continue to rise. Use cooling water to control the temperature below 45°C, disperse and cool to room temperature, then weigh and add other ingredients, stir and mix evenly, and filter to obtain a coating combination for metal substrates. things. Mixed solvent A in Table 1-10 is xylene 35%, n-butanol 25%, propylene glycol methyl ether 30% and DBE 10%, mixed by weight; mixed solvent B is solvent oil solvesso 150#45%, propylene glycol methyl ether Acetate 30%, isophorone 15% and DBE 10%, mixed by weight.

[0042] The raw material composition of table 1 epoxy phenolic comparison coating

[0043] ...

Embodiment 1

[0045]

Embodiment 2

[0047]

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Abstract

The invention discloses a coating composition and an application of the coating composition to a metal base material. The solid content of the coating composition is 40-70%. The coating composition comprises the following components of, by weight, 5-60% of saturation polyester resins, 0-25% of crylic acid resins, 2-30% of crossing-link agents, 20-80% of polyvinyl chloride homopolymer, 0-15% of additives, 0-40% of pigments and the balance dilution solvents, wherein average molecular weight Mn of the saturation polyester resins is 3000-8000, the vitrification temperature of the saturation polyester resins is 10-20 DEG C, the acid value of the saturation polyester resins is 0-5, the hydroxyl value of the saturation polyester resins is 30-90, and the saturation polyester resins are free of neopentyl glycol. The coating composition is free of bisphenol-A diglycidyl glycerol ether (BADGE) and bisphenol A (BPA). According to the coating composition, the polyester resins which meet requirements can be easily obtained, improved space of resin performances is large, 40%-70% of the solid content of final products can be achieved, and a large quantity of organic solvents are saved.

Description

(1) Technical field [0001] The invention relates to a coating composition and its application on metal substrates, especially the application on the substrates of metal containers and their covers used for storing and transporting food or beverages. (2) Background technology [0002] Metal containers and their lids used for storing and transporting food or beverages usually have one or more coatings to prevent contact between the filled product and the metal, thereby preventing or minimizing corrosion of the metal and damage to the metal by the product. any adverse effect on product quality. To manufacture containers of this type, the metal sheets used are coated with a suitable coating composition before they are shaped or deformed. The composition can replace the existing epoxy phenolic paint system, and satisfies the performance of the production and processing of painted iron and the corrosion of contents such as canned food / beverage. [0003] Epoxy novolac coatings ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/00C09D133/00C09D127/06
Inventor 孙希岚朱争礼陈飞顾闻
Owner HANGZHOU CPMC
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