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    Home > Coatings News > Paints and Coatings Market > Coating technology: preparation of UV curable coating

    Coating technology: preparation of UV curable coating

    • Last Update: 2020-04-03
    • Source: Internet
    • Author: User
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    Core tip: This product is a UV curable coating, especially suitable for antirust decoration of metal surface It is composed of active oligomer, active diluent, photopolymerization initiator and diluent Its main components are maleic anhydride modified epoxy acrylate and adhesion enhancing resin containing epoxy group The content of each component of the coating is as follows: A Epoxy acrylate modified by maleic anhydride, an active oligomer, 30% ~ 60% B Active diluent 15% - 45% C Epoxy group Paint agent, top 10 Chinese wall paint brands Recommended introduction: interior wall paint and exterior wall paint can achieve beautiful, clean and pleasant effects, but the effects in different environments are different, so the color of the paint will be different There are ten brands of Chinese paint, ten brands of global paint, ten brands of Chinese wall paint, and ten brands of Chinese paint, Famous trademark of Chinese paint and coating In private rooms, most of us choose according to our own personality, personal hobbies and living habits The younger generation will choose the interior wall paint with rich colors and bright colors, while the older ones will have some working experience Coating home news: This product is a UV curing coating, especially suitable for metal surface rust proof decoration It is composed of active oligomer, active diluent, photopolymerization initiator and diluent Its main components are epoxy acrylate modified by maleic anhydride and adhesion enhancing resin containing epoxy group The content of each component of the coating is as follows: A, epoxy acrylate modified by maleic anhydride of active oligomer 30% - 60% B, active diluent 15% - 45% C 2% - 5% d of epoxy resin, 1.0% - 10% e of photopolymerization initiator, 0-20% diluent Among them, epoxy acrylate modified by maleic anhydride is prepared by mixing epoxy resin with 0.45-0.54 epoxy resin and unsaturated hydroxy acid in equal equivalent ratio, heating reaction to acid value of 5mgKOH / g in the presence of catalyst and polymerization inhibitor, cooling rate, adding 0.1-0.3 equivalent maleic anhydride under stirring In other words), heat preservation reaction is stirred at ≤ 85 ℃ until the acid value is 10-30mgkoh / g The epoxy resin used is bisphenol A epoxy resin, bisphenol F epoxy resin or phenolic epoxy resin, and the unsaturated hydroxy acid used is acrylic acid to obtain excellent acrylic acid Active dilution consists of 5% - 20% acrylate with one olefin bond, 5% - 15% acrylate with two olefin bonds and 5% - 10% acrylate with more than three olefin bonds (1) Preparation of epoxy acrylate modified by active oligomer maleic anhydride ① dosage of formula / g A1 resin A2 resin A3 resin A4 resin epoxy resin 110.6 110.6 110.0 100.0 unsaturated carboxylic acid (acrylic acid) 42 42 37 32 maleic anhydride 8.56.07.06.0 maleic anhydride / epoxide resin (equivalence ratio) 0.298 0.209 0.2760.275 catalyst (n, N-Dimethylethanolamine) 1.36 1.36 1.10 1.10 polymerization inhibitor (p-methoxyphenol) 0.54 0.54 0.41 0.38 diluent (glycol ether acetate) 40 40 36 35 active oligomer acid value / (mg KOH / g) 26 20 25 22 ② preparation process A1 resin: add 110.6g phenolic epoxy resin F-44 into a four neck bottle with agitator, condenser, thermometer and drip funnel, and drop 42g acrylic acid, 1.36g n, N-Dimethylethanolamine and 0.54g p-methylphenol mixture at a fixed speed within 30min at 100 ℃, stirring When the acid value of the mixture is reduced to 5mgKOH / g, the mixture is cooled, and 40g glycol ether acetate is added to mix, which is called epoxy acrylate prepolymer Then, 8.5g of maleic anhydride was added into the mixture under stirring, and the mixture was stirred at < 85 ℃ for 8h to react in heat preservation The epoxy acrylate modified by maleic anhydride was obtained The acid value of the resin is 26mgkoh / g, which is called A1 resin for short A2 resin: epoxy acrylate prepolymer is prepared according to the same method above The epoxy acrylate modified by maleic anhydride was prepared by adding 6G of maleic anhydride into the mixture and stirring the mixture at 85 ℃ for 8h The acid value of the resin is 20mgkoh / g, which is called A1 resin for short A3 resin: add 100g bisphenol A epoxy resin E-51 into a four neck bottle with a stirrer, a condenser, a thermometer and a drip funnel, and drop 37G of acrylic acid, 1.1gn, N-Dimethylethanolamine 0.41g of p-methylphenol at a fixed speed within 30min at 100 ℃, stirring When the acid value of the mixture is reduced to 5mgKOH / g, the mixture is cooled, and 36g glycol ether acetate is added to mix, which is called epoxy acrylate prepolymer Then 7 g of maleic anhydride was added under stirring, and the mixture was stirred at 85 ℃ for 8 h to obtain epoxy acrylate modified by maleic anhydride The acid value of the resin is 25mgkoh / g, which is called A3 resin for short A4 resin: add 100g bisphenol A epoxy resin E-44 into a four neck bottle with agitator, condenser, thermometer and drip funnel, and drop 32g acrylic acid, 1.1gn, N-Dimethylethanolamine 0.38g p-methylphenol mixture at a fixed speed within 30min at 100 ℃, stirring When the acid value of the mixture is reduced to 5mgKOH / g, the mixture is cooled, and 35g glycol ether acetate is added to mix, which is called epoxy acrylate prepolymer Then 6G of maleic anhydride was added into the mixture under agitation, and the mixture was stirred at < 85 ℃ for 8 hours to obtain epoxy acrylate modified by maleic anhydride The acid value of the resin is 22mgkoh / g, which is called A3 resin for short (2) Example 1: take 50g A1 resin, add 10g hydroxyethyl acrylate, 10g propylene glycol diacrylate, 10g trimethylolpropane triacrylate, 5g epoxy resin E-51 (adhesion enhancing resin) 2-hydroxy-2-methyl-1-phenylacetone under agitation to obtain UV light curing coating In case 2, except taking 50g A2 resin instead of A1 resin, the rest were the same as case 1 In example 3, 60 g of A3 resin was taken, 10 g of hydroxyethyl acrylate, 10 g of propylene glycol triacrylate, 10 g of trimethylolpropane triacrylate, 5 g of epoxy resin E-51 (adhesion enhancing resin) and 5 g of 2-hydroxy-2-methyl-1-phenylacetone were added under stirring to obtain UV curable coating Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,
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