KR0175188B1 - Acrylic resins for paints - Google Patents

Abstract

The present invention relates to acrylic resins for oil-based paint modifiers, alkyd resins, acrylic resins, amino resins, polyester resins, urethane resins, epoxy resins, vinyl chloride resins, chlorinated rubber resins, fluorine resins, silicone modified resins And it is compatible with petroleum resin and the like to prepare a paint modifier using it and add to the paint has the effect of improving the pigment wettability, pigment dispersion stability, dry film adhesion and coating glossiness.

In addition, the present invention relates to an acrylic resin for a paint modifier, which shows an effect of reducing manufacturing cost and improving productivity by manufacturing a modifier that can be applied to an overall oil paint using a single resin.

Description

Acrylic resins for paint modifiers

The present invention relates to an acrylic resin for an oil paint modifier, and to a production of an acrylic synthetic resin having good pigment wettability, pigment dispersion stability, coating film adhesion, gloss improvement, and good compatibility with other resins.

Conventional paint modifier resins have limited compatibility with various types of resins due to poor compatibility.

The present invention has been made by supplementing these points. Alkyd resin, acrylic resin, polyester resin, urethane resin, epoxy resin, amino resin, vinyl chloride resin, rubber chloride resin, fluorine resin, silicone modified resin, petroleum, Good compatibility with resins, etc. can be used as a resin for the overall oil paint modifier.

The object of the present invention is compatibility with enamel, super lacquer, combination paint, acrylic lacquer, acrylic urethane paint, alkyd-amino paint, epoch paint, fluorine paint, silicone modified paint, vinyl chloride paint, rubber rubber paint, etc. It is to enable the application to the overall oil-based paint by providing an excellent acrylic synthetic resin composition to prepare a unified modifier.

Referring to the acrylic resin production method for achieving the above object of the present invention.

That is, the present invention relates to one or more compounds of component A represented by the following formula (1), one or more compounds of component B represented by the following formula (2), of component C represented by formula (3) It is obtained by radical polymerization with one or more compounds and one or more compounds of component D which are radical copolymerizable basic compounds as essential components.

(1): component A

R ¹ is hydrogen or a methyl group and R ² is an alkyl or aryl group having 1 to 20 carbon atoms.

(2): component B

Wherein R ¹ is hydrogen or methyl group, R ³ is hydrogen or methyl group or aryl group, R ⁴ is C1-C20 alkyloxy, aryloxy, alkyloyloxy, or alkyloyloxy, arylloyloxy Or an aryl group.

(3): Component C

R ¹ is hydrogen or a methyl group and R ⁵ is an alkyl group having 1 to 20 carbon atoms.

Specific examples of component A include methyl acrylate, ethyl acrylate, propyl acrylate, η-butyl acrylate, iso-butyl acrylate, t-butyl acrylate, 2-ethylhexyl acrylate, lauryl acrylate, methyl meta Methacrylate, ethyl methacrylate, propyl methacrylate, η-butyl methacrylate, iso-butyl methacrylate, t-butyl methacrylate, 2-ethylhexyl methacrylate, lauryl methacrylate, and the like. Specific examples of component B include styrene, α-methyl styrene, stilbene, vinyl acetate, vinyl butyrate, vinyl benzoate, vinyl toluene, vinyl ethyl oxalate, and specific examples of component C are 2-hydroxy ethyl acrylate. , 2-hydroxy propyl acrylate, 2-hydroxy ethyl methacrylate, 2-hydroxy propyl methacrylate, and the like. Specific examples of component D include acrylamide, methacrylamide, N-methylol acrylamide, dimethyl amino ethyl methacrylate, tertiary butyl amino ethyl methacrylate, N-vinylpyrrolidone and the like.

Radical initiators used include organic peroxides such as benzoyl peroxide, dietary butyl peroxide, dicumyl peroxide, tertiary butyl per benzoate, 2,2'-azobis isobutylonitrile, 1,1'- Organic azo compounds, such as azobis (cyclohexane-1-carbonitrile) and a triphenyl azobenzene, are mentioned.

In the copolymer composed of component A, component B, component C and component D, component A and component B are provided to form a basic skeleton of the polymer to form a coating film and to improve the durability, based on 100 parts by weight of the copolymer. Component A is suitable for 40 to 80 parts by weight and component B is suitable for 5 to 45 parts by weight.

Components C and D are components that influence pigment wettability, pigment dispersion stability, coating film adhesion, and compatibility with other resins. Component C is suitable for 5 to 25 parts by weight with respect to 100 parts by weight of copolymer, and components D are 1 to 1. 10 parts by weight is suitable.

Component C and component D have poor compatibility and pigment wetting and pigment dispersion stability when less than the respective weight range, and when the weight range is exceeded, durability of the coating film may be reduced.

The copolymer production method is suitable for solution polymerization. The organic solvents used are aromatic hydrocarbons such as benzene, toluene and xylene, aliphatic hydrocarbons having a boiling range of 115 to 220 ° C, methanol, ethanol, propanol, butanol, etc. Alcohols, esters such as ethyl acetate, butyl acetate, cellosolve acetate, 1-methoxy propyl acetate, butyl cellosolve, ethyl cellulose group and ketones such as ether, methyl ethyl ketone, and methyl isobutyl ketone.

It is preferable that solid content is 40-70 weight part at the time of solution polymerization, and reaction temperature and the quantity of initiator are adjusted so that the number average molecular weight of a copolymer may be in the range of 1,000-20,000.

When the molecular weight is less than 1,000, the durability of the coating film may be lowered. If the molecular weight is 20,000 or more, the compatibility may be lowered. Thus, a polymerization regulator of mercaptan is used to prevent the molecular weight from increasing more than necessary. Specific examples of the regulator include η-butyl mercaptan, η-dodecyl mercaptan 2-mercaptoethanol, and the like.

The temperature of the polymerization reaction is suitably in the range of 50 to 200 ° C, and the appropriate temperature is determined according to the initiator and the diluent solvent.

The following examples are described in more detail the manufacturing method and efficacy of the acrylic synthetic resin for paint modifiers according to the invention, but are not intended to limit the scope of the invention.

Example 1

While supplying nitrogen to a four-necked flask equipped with a condenser and capable of supplying and stirring nitrogen, a solvent was added according to the composition ratios of the components shown in Table 1, and the temperature was raised to 100 ° C., followed by stirring. A mixture of C, component D, and an initiator was added dropwise evenly over 4 hours, followed by a holding reaction for 4 hours. When the reaction proceeded more than 97%, the reaction mixture was cooled to room temperature to obtain a copolymer.

Example 2

While supplying nitrogen to a four-necked flask equipped with a condenser and capable of supplying and stirring nitrogen, a solvent was added according to the composition ratios of the components shown in Table 1, and the temperature was raised to 120 ° C., followed by stirring. A mixture of C, component D, and an initiator was added dropwise evenly over 4 hours, followed by a holding reaction for 4 hours. When the reaction proceeded more than 97%, the reaction mixture was cooled to room temperature to obtain a copolymer.

Reference Example 1

Using the copolymer obtained in Example 1, compatibility tests with various coating resins were carried out. Table 2

Reference Example 2

Using the copolymer obtained in Example 2, compatibility tests were performed with various coating resins. Table 2

Comparative Example 1

The copolymer obtained in Example 1 was replaced with 100 wt% of an existing resin in a naturally dry alkyd enamel (KSM 5701) to compare raw materials and physical properties. Table 3

Comparative Example 2

The copolymer obtained in Example 1 was replaced with 10 wt% of the natural resin in natural dry alkyd enamel to the original resin to compare the raw materials with the physical properties. Table 3

Comparative Example 3

The copolymer obtained in Example 1 was replaced with 10 wt% of the existing resin in the acrylic urethane paint to compare the raw material and physical properties. Table 4

[Comparative Example 4]

The copolymer obtained in Example 2 was replaced with 10 wt% of the existing resin in the acrylic urethane paint to compare the properties of the raw paint and physical properties. Table 4

Claims (2)

In containing 40-80 weight part of one or more compounds represented by following formula (1), and 5-25 weight part of one or more compounds represented by following formula (3) with respect to 100 weight part of copolymers, 5 to 45 parts by weight of one or more compounds represented by formula (2) and 1 to 10 parts by weight of one or more radical copolymerizable basic compounds are copolymerized, and an acrylic resin for a paint modifier. (Wherein R ¹ is hydrogen or methyl group, R ² is alkyl group or aryl group of 1 to 20 carbon atoms, R ³ is hydrogen or methyl group or aryl group, R ⁴ is alkyloxy, aryloxy or An alkyloyloxy, aryloyloxy or an aryl group, and R ⁵ is an alkyl group having 1 to 20 carbon atoms.) The acrylic resin for a paint modifier according to claim 1, wherein the copolymer has a number average molecular weight of 1,000 to 20,000.