News Details
Environmental friendly coating crosslinking agent
2017-6-3 15:41:50
Environmental friendly coating crosslinking agent
The research and development of pollution-free and environment-friendly coatings are becoming more and more concerned. Waterborne wood coatings with water as medium, non-toxic tasteless, no pollution and harmless to the human body and popularity, are widely used in the wooden doors and Windows, furniture, floor and bamboo instruments decorative protection, become a new hot spot in the development of environmental protection coating.
In this paper, based on castor oil, trimethylolpropane, epoxy resin and acrylic resin modified waterborne polyurethane (pu) at the same time, give full play to their respective performance advantages, through multiple crosslinking modification were the good comprehensive properties of water-based wood coatings.
The main raw materials of the experiment: isopolone diisocyanate (IPDI), industrial products; Polyether polyols (N220, relative molecular weight of 2000), industrial products; The castor oil (C.O), which is pure; 1, 4-butanol (BDO), industrial products; Trimethyl-propane (TMP), reagent grade; Epoxy resins e-20, industrial products; Dihydroxymethyl propionic acid (DMPA), industrial products; Methyl methacrylate (MMA), industrial products; N-methylpyrrolidone (NMP), industrial products; Triethylamine (TEA), ethylenediamine (EDA), acetone, analytical pure, before use with 4A molecular sieve drying; Azo diisobutyronitrile (AIBN), chemically pure; Dibutyl dibutyl (DBTDL), analytical pure; It is an agent of film, fluid and thickening agent.
Synthetic of water-based polyurethane resin. Performed: under dry nitrogen protection, the dehydration of polyether diol, castor oil, IPDI and DBTDL joined with a thermometer, mixing device, and the reflux condenser 1000 mL of four flask, NCO value is measured by two n-butyl amine titration, reaction to the NCO is close to the theoretical value, and then add BDO, heat preservation for 1 h. NCO after reaching the theoretical value to join dihydroxy methyl propionic acid (DMPA), epoxy resin and trimethylolpropane, response to NCO e., reaching and then cooled to join MMA PU/MMA prepolymer.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Uses:
The product is identical to Ethancure 100 and Lonza DETDA 80, DETDA is very effective polyurethane elastomer chain extender; also be used as polyurethane and epoxy resin curing agent, epoxy resin of an antioxidant, industrial oils and lubricants . In addition, also as intermediates in organic synthesis.Especially for the RIM (reaction injection molding), is important in the field of spray polyurea chain extender species. Also can be used for casting polyurethane elastomer (CPU) and a curing agent, epoxy curing agent, epoxy resin of antioxidants, lubricants and industrial oils other antioxidants.
Emulsification (1) room temperature emulsification. The prepolymer is emulsified [6] in normal temperature water after neutralization of triethylamine, and A PU/MMA emulsion A is obtained by the diamine expansion chain. (2) 45 ℃ water emulsion. The prepolymer with triethylamine in 45 ℃ water after neutralization emulsification, ethylenediamine PU/MMA emulsion B extender chain.
Free radical emulsion polymerization. Will warm up the latex emulsion A or B heating to 70 ~ 70 ℃, even add the initiator solution within 3 h, insulation 1 ~ 2 h, the test of MMA conversion rate, until the conversion rate remains the same, cooling, discharging, with 200 mesh sieve, filtrate is the modified waterborne polyurethane emulsion (PUA).
With paint. Quantitative home-made modified PUA emulsion will stir under a certain speed, and then join in turn film-forming agent, flow ping agent, etc., add thickener adjusted to a suitable viscosity value, stir well, get the varnish.
The resin structure was analyzed by the Fourier infrared spectrometer (perkin-elmer spectrum -2000, KBr), which measured the range of 400 ~ 4000 cm-1.
Emulsion storage stability according to HG/T 3828-2006, the 0.5 L samples into suitable plastic or glass container, with about 10% of the space inside the bottle, after the seal in the (50 + 2) ℃ constant temperature drying box, take out after 7 d, under (23 + 2) ℃ placed 3 h, in accordance with 6.4.1 method test "state" in the container, if no lumps stir evenly, argues that "without exception".
The preparation of the coating. According to GB/T 1727-92, the general preparation of the paint film, apply the brush and apply for the film.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
The research and development of pollution-free and environment-friendly coatings are becoming more and more concerned. Waterborne wood coatings with water as medium, non-toxic tasteless, no pollution and harmless to the human body and popularity, are widely used in the wooden doors and Windows, furniture, floor and bamboo instruments decorative protection, become a new hot spot in the development of environmental protection coating.
In this paper, based on castor oil, trimethylolpropane, epoxy resin and acrylic resin modified waterborne polyurethane (pu) at the same time, give full play to their respective performance advantages, through multiple crosslinking modification were the good comprehensive properties of water-based wood coatings.
The main raw materials of the experiment: isopolone diisocyanate (IPDI), industrial products; Polyether polyols (N220, relative molecular weight of 2000), industrial products; The castor oil (C.O), which is pure; 1, 4-butanol (BDO), industrial products; Trimethyl-propane (TMP), reagent grade; Epoxy resins e-20, industrial products; Dihydroxymethyl propionic acid (DMPA), industrial products; Methyl methacrylate (MMA), industrial products; N-methylpyrrolidone (NMP), industrial products; Triethylamine (TEA), ethylenediamine (EDA), acetone, analytical pure, before use with 4A molecular sieve drying; Azo diisobutyronitrile (AIBN), chemically pure; Dibutyl dibutyl (DBTDL), analytical pure; It is an agent of film, fluid and thickening agent.
Synthetic of water-based polyurethane resin. Performed: under dry nitrogen protection, the dehydration of polyether diol, castor oil, IPDI and DBTDL joined with a thermometer, mixing device, and the reflux condenser 1000 mL of four flask, NCO value is measured by two n-butyl amine titration, reaction to the NCO is close to the theoretical value, and then add BDO, heat preservation for 1 h. NCO after reaching the theoretical value to join dihydroxy methyl propionic acid (DMPA), epoxy resin and trimethylolpropane, response to NCO e., reaching and then cooled to join MMA PU/MMA prepolymer.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Uses:
The product is identical to Ethancure 100 and Lonza DETDA 80, DETDA is very effective polyurethane elastomer chain extender; also be used as polyurethane and epoxy resin curing agent, epoxy resin of an antioxidant, industrial oils and lubricants . In addition, also as intermediates in organic synthesis.Especially for the RIM (reaction injection molding), is important in the field of spray polyurea chain extender species. Also can be used for casting polyurethane elastomer (CPU) and a curing agent, epoxy curing agent, epoxy resin of antioxidants, lubricants and industrial oils other antioxidants.
Emulsification (1) room temperature emulsification. The prepolymer is emulsified [6] in normal temperature water after neutralization of triethylamine, and A PU/MMA emulsion A is obtained by the diamine expansion chain. (2) 45 ℃ water emulsion. The prepolymer with triethylamine in 45 ℃ water after neutralization emulsification, ethylenediamine PU/MMA emulsion B extender chain.
Free radical emulsion polymerization. Will warm up the latex emulsion A or B heating to 70 ~ 70 ℃, even add the initiator solution within 3 h, insulation 1 ~ 2 h, the test of MMA conversion rate, until the conversion rate remains the same, cooling, discharging, with 200 mesh sieve, filtrate is the modified waterborne polyurethane emulsion (PUA).
With paint. Quantitative home-made modified PUA emulsion will stir under a certain speed, and then join in turn film-forming agent, flow ping agent, etc., add thickener adjusted to a suitable viscosity value, stir well, get the varnish.
The resin structure was analyzed by the Fourier infrared spectrometer (perkin-elmer spectrum -2000, KBr), which measured the range of 400 ~ 4000 cm-1.
Emulsion storage stability according to HG/T 3828-2006, the 0.5 L samples into suitable plastic or glass container, with about 10% of the space inside the bottle, after the seal in the (50 + 2) ℃ constant temperature drying box, take out after 7 d, under (23 + 2) ℃ placed 3 h, in accordance with 6.4.1 method test "state" in the container, if no lumps stir evenly, argues that "without exception".
The preparation of the coating. According to GB/T 1727-92, the general preparation of the paint film, apply the brush and apply for the film.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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