News Details
Functional acrylic emulsion coating crosslinking agent
2017-6-3 15:42:00
Functional acrylic emulsion coating crosslinking agent
In order to save oil resources and reduce the pollution of the environment, the world has been actively developing environmentally friendly coatings and water-based environmental protection coatings have been developed unprecedentedly. Constant temperature curing acrylic acid paint is mainly non-solvent, pollution-free, safe, low cost, convenient to use and widely applied.
However, the coating has some shortcomings in hardness, wear-resisting, heat resistance and solvent resistance. Therefore, it is an effective method to improve the comprehensive performance of the coating by using the foreign coupler to solidify the temperature of the water-based acrylic coating.
This paper optimization of nitrogen functional monomer, acrylic acid monomer and the preparation of core-shell emulsion polymerization process which has the function of foreign league water-based acrylic emulsion, coating material performance.
The experimental materials. Monomer: acrylate (BA), methyl methacrylate (MMA); Ethyl methacrylate; Twelve mercaptan; Methacrylate (MA), acrylic acid, glycolate. Nitrogen containing functional unit SD; Ammonium persulfate; Tert-butyl peroxide, sodium sulfite, chemical pure reagent; The alkyl-12, dodecyl sulfonate (k-12), octyl phenol polyoxyethylene ether (OP -10), alkyl diphenyl ether sodium sulfonate (Dowfax 2AI). Polyamide epoxy chloropropane (PAE).
The main equipment and instruments. ZKSY thermostatic water bath pot; S212 constant speed mixer; JJ100 precision electronic balance; Sxt-06 solver drawer; The dzf-6020 vacuum drying cabinet; QFZ - Ⅱ film adhesion tester; Qhq-a-type portable pencil indentation hardness tester.
Coating preparation. Emulsion synthesis procedure
1) according to take composite emulsifier sodium dodecyl sulfate, 2 ai and OP - 10, pH buffer NaHCO3 and quantitative distilled water, add 500 ml of four flask with a condensation system, the oil bath heating temperature control, high-speed emulsification under 60 ℃ after 20 min, up to 80 ℃.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine packing： net weight 200KG/ galvanized iron drum (a small cabinet pallet loaded 16 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).
2) in the flask to join part of mixed monomers of 20% and 40% of ammonium persulfate solution, A solution for 30 min after blue, began to drop and hybrid monomer B, about 100 min drops out, and add the rest of the solution of ammonium persulfate initiator, 2.5 ~ 3 h drip off.
3) when the mixture of the B mixture is finished, 15min, start with the added C monomer, and 60 ~ 70min drops are added.
4) C mixed monomers and finished about 10 min, the time to join the rest of the ammonium persulfate solution, heating to 83 ~ 85 ℃ to 30 ~ 40 min reaction, cooled to about 70 ℃, to join the monomer amount 0.1% tertiary butyl peroxide, and adding suitable amount of sodium bisulfite solution after 1 h of reaction, the reaction system temperature cooling below 60 ℃, plus ammonia adjust the pH 8.5 ~ 9.0 of emulsion.
The preparation and coating properties of the foreign water-based acrylic emulsion coating. According to the emulsion solid alcohol ester with suitable amount of film forming additives - 12, diplomatic agent PAE (activation) in advance, and then coated on the metal plate, fully cured test performance.
The film performance is carried out by the national standard; Coating crosslinked density: will the samples with copper net wrap in the soxhlet extractor, using acetone solvent extraction under reflux temperature 12 h, calculate according to the quality of weightlessness crosslinking density after drying.
After the modification of polyamide epoxy chloropropane, the cross-linking density of the emulsion was greatly improved. The solvent, water resistance, adhesion and hardness of the adhesive film were significantly improved compared with the modification of the foreign agent. This is due to the interlinking of the resin molecules by the foreign agent and the densifier membrane.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
In order to save oil resources and reduce the pollution of the environment, the world has been actively developing environmentally friendly coatings and water-based environmental protection coatings have been developed unprecedentedly. Constant temperature curing acrylic acid paint is mainly non-solvent, pollution-free, safe, low cost, convenient to use and widely applied.
However, the coating has some shortcomings in hardness, wear-resisting, heat resistance and solvent resistance. Therefore, it is an effective method to improve the comprehensive performance of the coating by using the foreign coupler to solidify the temperature of the water-based acrylic coating.
This paper optimization of nitrogen functional monomer, acrylic acid monomer and the preparation of core-shell emulsion polymerization process which has the function of foreign league water-based acrylic emulsion, coating material performance.
The experimental materials. Monomer: acrylate (BA), methyl methacrylate (MMA); Ethyl methacrylate; Twelve mercaptan; Methacrylate (MA), acrylic acid, glycolate. Nitrogen containing functional unit SD; Ammonium persulfate; Tert-butyl peroxide, sodium sulfite, chemical pure reagent; The alkyl-12, dodecyl sulfonate (k-12), octyl phenol polyoxyethylene ether (OP -10), alkyl diphenyl ether sodium sulfonate (Dowfax 2AI). Polyamide epoxy chloropropane (PAE).
The main equipment and instruments. ZKSY thermostatic water bath pot; S212 constant speed mixer; JJ100 precision electronic balance; Sxt-06 solver drawer; The dzf-6020 vacuum drying cabinet; QFZ - Ⅱ film adhesion tester; Qhq-a-type portable pencil indentation hardness tester.
Coating preparation. Emulsion synthesis procedure
1) according to take composite emulsifier sodium dodecyl sulfate, 2 ai and OP - 10, pH buffer NaHCO3 and quantitative distilled water, add 500 ml of four flask with a condensation system, the oil bath heating temperature control, high-speed emulsification under 60 ℃ after 20 min, up to 80 ℃.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine packing： net weight 200KG/ galvanized iron drum (a small cabinet pallet loaded 16 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).
2) in the flask to join part of mixed monomers of 20% and 40% of ammonium persulfate solution, A solution for 30 min after blue, began to drop and hybrid monomer B, about 100 min drops out, and add the rest of the solution of ammonium persulfate initiator, 2.5 ~ 3 h drip off.
3) when the mixture of the B mixture is finished, 15min, start with the added C monomer, and 60 ~ 70min drops are added.
4) C mixed monomers and finished about 10 min, the time to join the rest of the ammonium persulfate solution, heating to 83 ~ 85 ℃ to 30 ~ 40 min reaction, cooled to about 70 ℃, to join the monomer amount 0.1% tertiary butyl peroxide, and adding suitable amount of sodium bisulfite solution after 1 h of reaction, the reaction system temperature cooling below 60 ℃, plus ammonia adjust the pH 8.5 ~ 9.0 of emulsion.
The preparation and coating properties of the foreign water-based acrylic emulsion coating. According to the emulsion solid alcohol ester with suitable amount of film forming additives - 12, diplomatic agent PAE (activation) in advance, and then coated on the metal plate, fully cured test performance.
The film performance is carried out by the national standard; Coating crosslinked density: will the samples with copper net wrap in the soxhlet extractor, using acetone solvent extraction under reflux temperature 12 h, calculate according to the quality of weightlessness crosslinking density after drying.
After the modification of polyamide epoxy chloropropane, the cross-linking density of the emulsion was greatly improved. The solvent, water resistance, adhesion and hardness of the adhesive film were significantly improved compared with the modification of the foreign agent. This is due to the interlinking of the resin molecules by the foreign agent and the densifier membrane.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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