Water-based polybutadiene resin coating crosslinking agent

Water-based polybutadiene resin coating crosslinking agent

Water-based polybutadiene coating process. In the reactor, to join 100 HTPB, 20 copies of maleic anhydride, a small amount of inhibitor, temperature to 100 ℃ 6 h. Add too much water, in the 90 ℃ 3 h reaction, reacts to heat up to 100 ℃ for 2 h. Cool down and remove excess water. Join 18 linolenic acid glycidyl ester, 120 ℃ 5 h reaction, cooling, adding cosolvent, drier, neutralizing agent and water, stir for a quick water-based paint. Use iron sheets to soak and dry at room temperature.

Anion polybutadiene electrophoresis coating

One, liquid polybutadiene. Electrodeposition coatings with polybutadiene is commonly relative molecular mass of 500 ~ 5000 liquid polybutadiene (LPB), the common preparation for under nitrogen atmosphere in the 30 l reaction kettle with 1 mol 芐 sodium base, 15 mol, toluene and 15 l n-hexane, then heat up to 30 ℃, add 10 l butadiene more than 2 h.

Two, then with methanol, stop the polymerization. Add gypsum powder, stir well, filter the mixture and remove the base polymer transparent solution. The non-reactive butadiene, toluene and n-hexane were vaporized from the polymer solution, and the polybutadiene was obtained.

Dianization. The anode electrophoresis coating is made by anionic polybutadiene, which is usually caused by anhydride reaction.

The process for adding 1000 g in 2 l autoclave polybutadiene, maleic anhydride, 212 g to 300 g and 2 g xylene antigen 3 c, in nitrogen atmosphere reaction under 19 ℃ 8 h, under the low pressure steam out not reaction of maleic anhydride and xylene, get polybutadiene maleic anhydride. The polybutadiene is obtained by hydrolysis of the polybutadiene after the polybutadiene acid anhydride.

According to the formula ratio of polybutadiene, antioxidants, maleic anhydride, join the reaction kettle, xylene, nitrogen, after waiting for maleic anhydride melting, stirring, heating up to 200 + 10 ℃, insulation 4 h, 1 h to vacuum, after xylene extraction, resin viscosity and the acid value sampling test, qualified after the temperature to 140 ℃, add formula, amount of crosslinking agent, ethylene glycol butyl ether, butyl acetate, after 140 ℃ heat preservation 3 h, cool to filter out under 100 ℃.

The water-soluble polybutadiene resin was neutralized by organic amine and then added pigment, stuffing and auxiliary agent, and the solid content was (50 + + 2) % h11-94 anode electrophoretic coating after grinding to fine quality.




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).


Electrophoresis coating and film performance index. The black electrophoresis paint should be mixed with a solid content of 14 to 17 percent of the liquid, which can be applied after 24h. The pH of the tank is 8.0 ~ 9.0. Construction temperature is 25 ~ 40 ℃; The construction voltage is 100 ~ 180V; The conductivity is (1200 plus or minus 500) mu S. The penetration is greater than 16%. The coating performance test results are shown in table 2-10.

H11-94 anode electrophoresis coating is convenient, and the slot is suitable. It is mainly used in automobile, agricultural machine, motorcycle, bicycle and mechanical and electrical products as anti-rust primer, and also can be used in the combination of steam matching and modu-product.

Polymers that make up a emulsion or a dispersion usually have a glass temperature that is above room temperature. In order for the emulsion particle to fuse well into a uniform paint film, it must be used to reduce the minimum film temperature (MFFT). The film agent is a small molecule organic compound, and the film agent that is present in the paint film will eventually escape and evaporate.

Most of the film additives are an important part of the coating organic volatiles (VOC), so the less the film agent should be used, the better. The choice of film agent should be given priority to not be restricted by the VOC, but it should not be too slow, and the membrane efficiency should be high. The amount of the agent is determined by the amount of emulsion or water in the formula and the temperature of the glass.

Dosage of emulsion or some big and high Tg, polymer film-forming agent dosage is bigger, whereas less dosage, formula design, first consider film-forming agent is about 3% of the emulsion or some - 5%, of the emulsion or dispersions solids content of 5% ~ 15%.

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Diethyl toluene diamine(DETDA)  http://www.yaruichem.com