KR930004700B1 - Synthetic resin vehicle - Google Patents

Abstract

The acryl-epoxy-polyamide vehicle is produced by additionally reacting 77-78 wt. pts. of a water-soluble acryl resin contg. at least one carboxylic acid, 4-14 wt. pts. of a water-soluble epoxy resin, 2-12 wt. pts. of a water-soluble polyamide resin and 1-10 wt. pts. of a solvent at 65-85 deg.C for 2-4 hr, and polymerizing the reactant. The vehicle has a good chemical-resistance, and is useful for paints and waterproofing materials.

Description

Resin vehicle

The present invention relates to a vehicle such as a paint, a waterproofing agent, etc. In more detail, a method for producing a naturally-dried one-component synthetic resin vehicle by copolymerizing a water-soluble epoxy resin and a water-soluble polyamide resin in an acrylic resin solution prepared by solution polymerization. And to a paint and a waterproofing agent containing the vehicle manufactured.

Acrylic resins and epoxy resins are widely known as paint vehicles or various vehicles. Such synthetic resin vehicles are manufactured with water-soluble and oil-based products, and since oil-based products use organic solvents, they not only pollute the working environment but are expensive and their use is limited. On the other hand, since aqueous products are prepared in an emulsion type emulsion dispersion method, they have low viscosity, low drying time, water resistance, chemical resistance, and the like. Particularly, when used as a paint, an aqueous coating agent has a low gloss and needs to be repainted with a top coat, and a viscosity such as a thickener should be used. Moreover, water-based epoxy resins have inconveniences in use as two-component paints.

U.S. Patent No. 3,816,557 discloses a coating agent of an acrylic-epoxystel graft copolymer and an epoxy resin. Such a coating composition is known to be excellent in adhesion, corrosion resistance and chemical resistance, but since it is oily, a problem of using a mixed solvent in use has appeared.

In addition, Japanese Patent Application Laid-Open No. 53-132030 discloses a permeable waterproof composition in which an epoxy resin emulsion zone and a polyamide-polyamine compound are mixed. Such a waterproof composition is simply a mixture of an epoxy resin and a polyamide-polyamine, and because it is a two-component composition, it is inconvenient to use and has not excellent compressive strength.

SUMMARY OF THE INVENTION An object of the present invention is to provide a naturally-dried one-component synthetic resin vehicle or a one-component waterproofing agent having excellent absorption and compressive strength and stability in water-soluble, short drying time, excellent gloss and chemical resistance, excellent water resistance and accelerated weather resistance.

When briefly explaining a method for preparing the acrylic-epoxy-polyamide vehicle according to the present invention, 4-14 parts by weight of an epoxy resin emulsion and 77-87 parts by weight of a water-soluble acrylic resin containing at least one carboxylic acid group prepared by solution polymerization It is prepared by adding 2-12 parts by weight of polyamide resin emulsion and reacting at 60-85 ° C. for 2-4 hours.

Monomers used in the production of the acrylic resin of the present invention include methyl acrylate, ethyl acrylate, methyl methacrylate, propyl acrylate, isopropyl acrylate, isobutyl acrylate, butyl acrylate, hexyl acrylate, 2- Ethylhexyl acrylate, decyl acrylate, lauryl acrylate, ethyl methacrylate, isopropyl methacrylate, butyl methacrylate, hexyl methacrylate, 2-ethylhexyl-methacrylate, lauryl methacrylate, etc. As the monoma having a carboxyl group, acrylic acid, methacrylic acid, maleic acid, itaconic acid, and the like are used. The acrylic resin is prepared by a known solution polymerization method. For example, acrylic monomers, reaction initiators, solvents, neutralizers, water and reaction control agents selected from acrylic acid and acrylic acid esters containing at least one carboxyl group may be used. : 2-12: 0-5: 25-35: 2-12: 10-20: 0-5 The reaction is carried out by a known solution polymerization method at 90-115 ° C. and neutralized with a neutralizing agent. The acrylic resin produced should contain at least one carboxyl group.

Suitable reaction initiators include benzoic peroxide, dietary butyl peroxide tertiary butyl perbenzoate, 2,2-azobisisobutyronitrile and the like. Etc. are used.

For example, 60-65 parts by weight of epoxy 815, 7-10 parts by weight of anionic or nonionic emulsifier, 1 part by weight of an antifoaming agent is added to the reaction vessel, and 3-5 parts by weight of an organic solvent such as butyl cellsolve and 50-60 parts by weight of water are added. Mix for 2-3 hours.

As the epoxy resin, known products made from bisphenol and epichlorohydrin can be used, and typical examples are YD-010, YD-012, YD-017, YD-115, YD-127, and YD sold by Kukdo Chemical. Some are sold under the brand names such as -120 and YD-134.

As the polyamide resin used in the present invention, those prepared by diamine or polyamine and mono or dicarboxylic acids having 18 to 36 carbon atoms, those prepared by condensation of amino acids, or those prepared by ring opening of racktam can be used. It is good to use what is marketed under brand names, such as GO930, GO331, GO240, GO624.

For example, the polyamide resin may be stirred at 60 ° C. for 2-3 hours with 75 to 80 parts by weight of polyamide 225, 5-7 parts by weight of water, 13-18 parts by weight of butylcellulose, 1 part of antifoaming agent, and 1 part of plasticizer. Emulsify and use.

According to the present invention, the epoxy group and the polyamide group are grafted to the free carboxylic acid group of the acrylic resin. The resulting acrylic-epoxy-polyamide vehicle has a fast drying time, is excellent in gloss and chemical resistance, and is excellent in storage and promoting weather resistance, and thus is useful for coating film forming agents and waterproofing agents.

Examples are described below to clearly understand the present invention, in which parts denote parts by weight.

Example 1

[Step 1: Manufacture of Acryl Resin]

19 parts of isobutyl alcohol were put into a reaction vessel, and 27 parts of methyl methacrylate, 16 parts of 2-ethylhexyl acrylate, 4 parts of methacrylic acid, 2 parts of 2-azobisisobutyronitrile and 0.4 part of reaction regulator were injected. After reacting at −105 ° C. for 4 hours, 1.4 parts of isobutyl alcohol in which 0.2 parts of 2,2-azobisisobutyronitrile were dissolved were added, followed by 8 parts of isobutyl alcohol, 6 parts of ammonium hydroxide, and maintaining at 98-105 ° C. and Add 17 parts of water and stir.

[Step 2: Preparation of Epoxy Resin Emulsion]

Add 62 parts of epoxy 815, 8 parts of polyoxyethylene nonylphenyl ether, and 1 part of a deciduous agent, AC Ditable Oil (KKC), add 4 parts of butyl cellulsolve and 58 parts of water while stirring at 60-65 ℃. Stir until fully emulsified.

[Step 3: Preparation of polyamide emulsion]

77 parts of polyamide 225, 6 parts of water, 15 parts of butyl cellulsolve, 1 part of H. detatable oil, an antifoaming agent, and 1 part of diopium are placed in a reaction vessel and stirred until complete emulsification.

[Step 4: Addition]

8 parts and 4 parts of the emulsion prepared in the step 2 and step 3 were added together with 4 parts of the butyl cellosol part, respectively, and reacted for 2-3 hours at 60-85 ° C. Obtain the product.

NMR measurement results for the vehicle prepared in step 4 shows that the epoxy group is bonded to the carboxyl acid group of the acrylic resin and that the epoxy group and the polyamine group are bonded. GPC measurement result Mn-18,178; MW = 49,385; Mz = 106,371; Mwo = 2,717.

Example 2

[Production of Paint]

80.3 parts of the resin prepared in Example 1

TiO ₂ Part 10.0

DOP 0.1 part

Benton-34 0.3

Isobutyl alcohol 9.3 parts

The resin of Example 1 was mixed with titanium dioxide and milled to have a softening degree (N.S) of 5, and then the other components were added and mixed homogeneously to prepare a paint. The paints produced had a nonvolatile component of 45% and a viscosity (KU) of 98.

In order to test the characteristics of the vehicle according to the present invention, conventional acrylic emulsion resins, water-soluble epoxy resins, and oil-based acrylic resins were coated on glass specimens to a thickness of 75, and physical properties thereof were measured.

Paints and known physical properties of the present invention are listed in Table 1 below.

TABLE 1

Coating property comparison test

Note) ◎: Excellent ○: Normal △: Somewhat falling

Example 3

[Production of Waterproofing Agent]

140 parts by weight of oleic acid, 20 parts by weight of sodium hydroxide, 1-5 parts by weight of antifoaming agent and 100 parts by weight of water were added to the reaction vessel, followed by 2-3 hours of reaction at 70-90 ° C. for 10% solid ore acid. 2 parts by weight of sodium and the resulting sodium oleate were mixed with 12 parts by weight of the synthetic resin vehicle prepared in Example 1, 1 part by weight of sodium silicate and 85 parts by weight of water to prepare a 10% solid solution.

Table 2 shows the results of measuring the physical properties of the prepared waterproofing agent according to KSF 24.

TABLE 2

Claims (4)

4-14 parts by weight of a water-soluble epoxy resin, 2-12 parts by weight of a water-soluble polyamide resin, and 1-10 parts by weight of a solvent are added together with an organic solvent to 77-78 parts by weight of a water-soluble acrylic resin containing at least carboxylic acid group prepared by solution polymerization. A method of producing a synthetic resin vehicle, characterized in that the polymerization is carried out by addition reaction at 65-85 ° C. for 2-4 hours. The method of claim 1 wherein the water soluble acrylic resin is prepared from two or more acrylic monomers comprising acrylic acid having at least one carboxyl group. 77-78 parts by weight of water-soluble acrylic resin having at least one carboxylic acid group, 4-14 parts by weight of water-soluble epoxy resin and 2-12 parts by weight of water-soluble polyamide resin are synthetic resin vehicles prepared by addition polymerization at 65-85 ° C in the presence of an organic solvent. A paint obtained by blending 75-85 parts by weight with 15-25 parts by weight of an additive such as a known pigment and a plasticizer. 77-78 parts by weight of water-soluble acrylic resin having at least one carboxylic acid group, 4-14 parts by weight of water-soluble epoxy resin and 2-12 parts by weight of water-soluble polyamide resin are synthetic resin vehicles prepared by addition addition at 65-85 ° C in the presence of an organic solvent. A water repellent comprising 10-20 parts by weight of fatty acid sodium 1-5 parts by weight and other additives 0.1-1 part by weight of 78-88 parts by weight of water.