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Acrylic resin used for PVDF fluorocarbon coating and synthetic method of acrylic resin

An acrylic resin and fluorocarbon coating technology, applied in the coating and other directions, can solve the problems of insufficient temperature resistance, affecting the appearance effect, and the paint is easy to turn yellow, and achieves improved performance, excellent appearance effect, and excellent resistance. baking effect

Inactive Publication Date: 2018-01-19
广东依斯特新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, the acrylic resin used in PVDF fluorocarbon coatings greatly affects the appearance of white PVDF fluorocarbon coatings because of its insufficient temperature resistance, making the coatings easily turn yellow after baking.

Method used

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  • Acrylic resin used for PVDF fluorocarbon coating and synthetic method of acrylic resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] An acrylic resin for PVDF fluorocarbon coatings, including monomers, the monomers include at least one methacrylate monomer and at least one acrylate monomer, and also include a functional baking-resistant anti-yellowing additive, The functional baking and anti-yellowing auxiliary agent is selected from a compound of a phosphorus-containing heat stabilizer and an antioxidant and / or a compound of a rare earth heat stabilizer and an antioxidant containing a sulfonic acid group thing.

[0026] The monomer is synthesized by a copolymerization reaction, and the copolymerization reaction is a solution polymerization reaction.

[0027] Calculated in terms of mass percentages: the methacrylate monomer accounts for 55-75%, the acrylate monomer accounts for 20-50%, and the functional baking-resistant anti-yellowing additive accounts for 1-3%.

[0028] The methacrylate monomer is selected from at least one of methyl methacrylate, ethyl methacrylate, and n-butyl methacrylate.

[...

Embodiment 2

[0043] Prepare the acrylic resin according to the method of Example 1, the monomers also include functional compound monomers, and the functional compound monomers can carry out copolymerization reaction with the methacrylate monomer and acrylate monomer; The functional compound monomer is an unsaturated carboxylic acid monomer, and the proportion of the functional compound monomer in the monomer is no more than 2% in terms of mass percentage.

[0044] Its specific formula parameters are as follows:

[0045] 63 parts by mass of methyl methacrylate, 36 parts by mass of ethyl acrylate, the functional compound is preferably methacrylic acid, its consumption is 0.65 parts by mass, and 0.35 parts of phosphorus-containing functional baking-resistant and anti-yellowing additives; The initiator is tert-butyl peroxybenzoate in an amount of 0.11 parts by mass; xylene is used as a polymerization solvent for the copolymerization reaction, so that the solid content of the reaction system i...

Embodiment 3

[0047] Prepare described acrylic resin according to the method of embodiment 1, and its specific formulation parameters are as follows:

[0048] 68 parts by mass of methyl methacrylate, 31.5 parts by mass of ethyl acrylate, 0.5 parts of functional baking-resistant and anti-yellowing additives containing rare earth sulfonic acid groups; the initiator is tert-butyl peroxybenzoate, and the dosage is 0.11 parts by mass Parts; use xylene as the polymerization solvent to carry out the copolymerization reaction, so that the solid content of the reaction system is 55%.

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Abstract

The invention discloses acrylic resin for a PVDF fluorocarbon coating and a synthetic method of the acrylic resin. The acrylic resin comprises a monomer comprising at least one methacrylate monomer and at least one acrylate monomer, a functional compound and a functional baking-resistant anti-yellowing auxiliary agent, wherein the functional compound contains a carbon-carbon double bond and can besubjected to free-radical addition polymerization with the methacrylate monomer and the acrylate monomer; and the synthetic method of the acrylic resin comprises the following steps: mixing a solventand a proper amount of an initiator, raising a temperature until reflux appears, adding a mixed liquid of the monomer and a proper amount of the initiator dropwise according to a formula amount, performing heat preservation for a period of time, adding the functional baking-resistant anti-yellowing auxiliary agent, keeping a temperature for a period of time, then adding the residual initiator, keeping a temperature for a period of time, performing cooling, performing diluting, performing cooling, and discharging a material to obtain the acrylic resin. The acrylic resin provided by the invention has baking resistance, can effectively improve usage performance of the PVDF fluorocarbon coating, and enables a final coating film of the PVDF fluorocarbon coating to be more stable.

Description

technical field [0001] The application relates to an acrylic resin for PVDF fluorocarbon coating and a synthesis method thereof, belonging to the technical field of polymer materials. Background technique [0002] PVDF fluorocarbon coating is a new type of coating material based on PVDF resin, which is compounded, modified and processed with acrylic resin with special structure. Its main feature is that the resin contains a large number of C-F bonds. Weather resistance and chemical medium corrosion resistance. Blending PVDF resin with acrylate polymer can improve the adhesion of PVDF resin. The addition of acrylic resin can improve the adhesion of PVDF resin to the substrate on the one hand, and improve the dispersion of PVDF resin to pigments on the other hand. Improves the phase stability of the final coating film. Acrylic resin is a resin made by the copolymerization of acrylates, methacrylates and other ethylenic monomers. By choosing different resin structures, differ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/14C08F220/06C08F220/18C08F2/06C08F2/44C09D127/16C09D7/48
Inventor 游东升赵军
Owner 广东依斯特新材料有限公司
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