Powder coating leveling agent and preparation method and application thereof

A powder coating and leveling agent technology, applied in the direction of coating, etc., can solve the problem of slow leveling speed of acrylic leveling agents, complicated preparation methods of silicone leveling agents, low surface tension of silicone leveling agents, etc. problem, to achieve the effect of low price, good heat resistance and strong hydrophobicity

Active Publication Date: 2016-08-24
NINGBO SOUTH SEA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyacrylate leveling agent is the most commonly used powder coating leveling agent, and CN1114666C, US5047259, US5397844 etc. disclose the formula and the preparation method of various polyacrylate leveling agents, its stable property is difficult for hydrolysis, has excellent gloss Stability and anti-aging, and non-volatile, can improve the flexibility and impact resistance of the coating film, does not affect recoating, but the leveling speed of acrylic leveling agents is slow
Organosilicon leveling agent is modified polydimethylsiloxane, publication number CN105131175A, CN105315757A, CN101180333B, CN102786626B provide the preparation method of various polysiloxane leveling agents, organic silicon leveling agent surface tension Small, poor compatibility with the coating system, can quickly migrate to the surface of the coating film, so it has a good fast leveling effect, but the preparation method of silicone leveling agent is complicated and expensive
Fluorocarbon modified acrylate (such as US6583223, CN101448865B, CN101952379B), surface tension is smaller than polyacrylate leveling agent, leveling speed is faster than unmodified polyacrylate leveling agent, but the same price is too high

Method used

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  • Powder coating leveling agent and preparation method and application thereof
  • Powder coating leveling agent and preparation method and application thereof

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Effect test

Embodiment 1

[0029] The invention provides a powder coating leveling agent and a preparation method thereof: add 400g xylene in a 2000ml four-necked flask with a stirring, thermometer and reflux device; mix 360g butyl acrylate, 40g soybean oil, and 10.2gBPO initiator , to completely dissolve the BPO, put it into the dropping funnel; heat the xylene to 105°C, start dropping, control the reaction temperature at 105-110°C, after 1.5h dropwise addition, continue to keep warm for 1.5h; remove the solvent in vacuo, and get Pale yellow transparent liquid, sample number 1#.

Embodiment 2

[0031] The invention provides a powder coating leveling agent and a preparation method thereof: add 400g xylene in a 2000ml four-neck flask with a stirring, thermometer and reflux device; mix 340g butyl acrylate, 60g soybean oil, and 9.2g BPO initiator Mix to dissolve the BPO completely, put it into the dropping funnel; heat the xylene to 105°C, start to add dropwise, control the reaction temperature to 105-110°C, complete the dropwise addition in 1.5h, keep it warm for 1.5h; remove the solvent in vacuum to get Pale yellow transparent liquid, sample number 2#.

Embodiment 3

[0033] The invention provides a powder coating leveling agent and a preparation method thereof: add 400g xylene in a 2000ml four-neck flask with a stirring, thermometer and reflux device; mix 300g butyl acrylate, 100g soybean oil, and 9.2g BPO initiator Mix to dissolve the BPO completely, put it into the dropping funnel; heat the xylene to 105°C, start to add dropwise, control the reaction temperature to 105-110°C, complete the dropwise addition in 1.5h, keep it warm for 1.5h; remove the solvent in vacuum to get Pale yellow transparent liquid, sample number 3#.

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Abstract

The invention provides a powder coating leveling agent and a preparation method thereof. The powder coating leveling agent is made by copolymerizing 5-40% by weight of a vegetable oil, 40-95% by weight of alkyl acrylate monomer, 0-20% by weight of alkyl methacrylate monomer by conventional dropwise polymerization; this vegetable oil is one of or a mixture of more than one of soybean oil, palm oil, rapeseed oil and castor oil, the alkyl acrylate monomer includes linear, branched or cyclic aliphatic monohydric alcohol ester with 2-22 carbon atoms, the alkyl methacrylate monomer includes linear, branched or cyclic aliphatic monohydric alcohol ester with 1-12 carbon atoms. The powder coating leveling agent of the invention has the advantages of greenness, low cost, high hydrophobicity, good leveling performance, heat resistance, acid and alkali resistance, good waterproof performance and the like, the preparation method is simple, and the powder coating leveling agent is applicable to powder coatings or solvent coatings.

Description

technical field [0001] The invention relates to the technical field of chemical raw material manufacturing, in particular to a leveling agent for powder coatings and its preparation method and application. Background technique [0002] Paint surfaces are usually not perfectly smooth, but more or less textured, which is called waviness or orange peel. For powder coatings, since there is no solvent, it is easier to form a surface tension gradient in the local area during the curing process of the coating film, and the substances at the low surface tension flow to the high surface tension, forming orange peel phenomenon and even shrinkage cavity after curing . As we all know, the main function of paint is decoration and protection. If the paint film is uneven and has irregular shrinkage cavities or defects, it will not only fail to achieve the decorative effect, but also reduce or damage its protective function. An effective way to overcome these disadvantages is to add a lev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D7/06C08F220/18C08F222/14C09D7/47
CPCC08F220/18C09D7/47C08F220/1804C08F220/1808C08F222/103
Inventor 于家波黄培吉蒋强生
Owner NINGBO SOUTH SEA CHEM
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