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Oxidative curing, alkyd-modified silicone acrylic copolymer

A technology of silicone acrylic copolymer, which is applied in the direction of coating, etc., can solve the problems of weather resistance, decrease of coating film strength, slow drying, etc., and achieve the effect of high initial gloss

Active Publication Date: 2016-02-24
HARIMA CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, alkyd resins have excellent initial gloss compared to acrylic resins and silicone-modified resins, but dry slowly, and weather resistance and coating film strength decrease in parts exposed to ultraviolet rays, wind and rain, etc.

Method used

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  • Oxidative curing, alkyd-modified silicone acrylic copolymer
  • Oxidative curing, alkyd-modified silicone acrylic copolymer
  • Oxidative curing, alkyd-modified silicone acrylic copolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0116] Hereinafter, although an Example and a comparative example are given and this invention is concretely demonstrated, this invention is not limited to these Examples.

Synthetic example

[0117] (Synthesis example: Synthesis of alkyd resin)

[0118] The following raw materials were added to the reaction vessel, the temperature was raised to 240° C., and the reaction was carried out until the acid value was 5 or less while removing moisture in the reaction system with a water separator. When the acid value was 5 or less, xylene was removed by distillation under reduced pressure. After cooling, the obtained reactant was diluted with 350 parts by mass of petroleum spirit to obtain an oil content of 50%, an acid value of 2.5, a viscosity (Gardner bubble viscometer / 25°C) Z, a color number (Gardner) of 6, and a non-volatile content of 60% by mass. alkyd resin.

[0119] Phthalic anhydride: 140 parts by mass

[0120] Dehydrated castor oil fatty acid: 260 parts by mass

[0121] Glycerin: 50 parts by mass

[0122] Pentaerythritol: 70 parts by mass

[0123] Reflux solvent (xylene): 15.6 parts by mass

Embodiment 1

[0125]

[0126] 17.53 parts by mass of the alkyd resin (60% by mass of non-volatile content) and 31.78 parts by mass of petroleum spirit obtained in the above synthesis example were put into a reaction vessel, stirred while blowing nitrogen gas, and heated to 120°C. Next, the mixture shown below was dropped into the reaction vessel over 2 hours while maintaining the temperature at 120°C. In addition, the ratio in parentheses shows the ratio of each monomer when the total amount of monomers is 100 mass %.

[0127] (mixture)

[0128] Isobutyl methacrylate: 21.24 parts by mass (50.0% by mass)

[0129] Tert-butyl methacrylate: 2.12 parts by mass (5.0% by mass)

[0130] n-butyl acrylate: 7.95 parts by mass (18.7% by mass)

[0131] Styrene: 10.70 parts by mass (25.2% by mass)

[0132] 2-Hydroxyethyl methacrylate: 0.43 parts by mass (1.0% by mass)

[0133] Methacrylic acid: 0.04 parts by mass (0.1% by mass)

[0134] tert-hexyl peroxyisopropyl monocarbonate: 0.46 parts by mass...

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Abstract

This oxidative curing, alkyd-modified silicone acrylic copolymer is obtained by reacting (a) an oxidative curing acrylic copolymer, and (b) a silicone having at least a hydroxyl group and / or an alkoxy group. The oxidative curing acrylic copolymer (a) is a copolymer obtained through graft polymerization of a monomer indicated by (a-1) styrenes, (a-2) (meth)acrylic acid esters, and (a-3) predetermined polymerizable unsaturated monomers, to an alkyd resin (c) having an oxidative polymerizable group.

Description

technical field [0001] The present invention relates to an oxidation-curable alkyd-modified silicone acrylic copolymer capable of forming a coating film excellent in initial gloss, weather resistance, initial dryness, and impact resistance (strength). Background technique [0002] Alkyd resins are based on fats and oils, and have oxidative polymerizability to form a coating film by oxidative drying and natural curing. Therefore, compared with oil-based blending paints that use mature oil (long oil) as a coating film-forming component, it dries faster and gives a coating film with initial gloss, and can be widely used as an iron paint for indoors and outdoors of general buildings. Synthetic resin and paint film-forming components of wood parts and interior parts. However, alkyd resins have excellent initial gloss compared to acrylic resins and silicone-modified resins, but dry slowly, and weather resistance and coating film strength decrease in parts exposed to ultraviolet r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/00C09D151/00C09D183/10
CPCC09D151/00C09D183/10C08G77/442
Inventor 大桥祐纪
Owner HARIMA CHEM INC
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