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Waterborne epoxy emulsion paint crosslinking agent
2017-8-5 16:02:19
Waterborne epoxy emulsion paint crosslinking agent
Waterborne crosslinking agent and waterborne epoxy technology are synchronous development. For water-based epoxy emulsified crosslinking agent, the crosslinking agent has the function of crosslinking and emulsification. The first successful water-based epoxy emulsion crosslinking agent is Casmide360 and its modified product Casmide362.
Early, USES the amidation polyamine used as crosslinking agent of type I waterborne epoxy system, although it can make the liquid epoxy resin emulsion, but the poor performance after crosslinking, water resistance and chemical resistance is poor, should be modified to keep them after crosslinking performance close to solvent epoxy resin coating.
Because polyamide kind of crosslinking agent emulsification system of epoxy resin applicable period is shorter, crosslinked coating flexibility is poor, poor impact resistance, coating of brittle of the modified polyamide class crosslinking agent performance is still not very ideal, therefore, used in waterborne epoxy emulsion crosslinking agent of crosslinking agent is mainly polyamine - epoxy adduct.
Common waterborne epoxy emulsion crosslinking agent were mostly to multiple amine crosslinking agent of chain extender, grafting, salt, in introducing a nonpolar molecule genes, making it a lipophilic epoxy resin molecular structure of water dispersible crosslinking agent, at the same time it as cationic emulsifier for epoxy resin emulsion, two component mixture can be made into a stable emulsion.
At present, more modified polyamide crosslinking agents are epoxy-polyamine admixture, and the commonly used preparation methods of epoxy modified polyamine crosslinking agent are generally divided into two types:
1) using ethylene polyamine and single epoxy or epoxy compound bonus, will be closed about 60% of the primary amine hydrogen, and then with the addition of by bisphenol A epoxy, achieve the appropriate water oil balance, then react with formaldehyde to further the primary amine hydrogen hydroxyl methylation, the crosslinking agent cross-linked epoxy system has good gloss, hardness and resistance to chemical character;
Chinese name: Diethyl toluene diamine(DETDA)
Waterborne crosslinking agent and waterborne epoxy technology are synchronous development. For water-based epoxy emulsified crosslinking agent, the crosslinking agent has the function of crosslinking and emulsification. The first successful water-based epoxy emulsion crosslinking agent is Casmide360 and its modified product Casmide362.
Early, USES the amidation polyamine used as crosslinking agent of type I waterborne epoxy system, although it can make the liquid epoxy resin emulsion, but the poor performance after crosslinking, water resistance and chemical resistance is poor, should be modified to keep them after crosslinking performance close to solvent epoxy resin coating.
Because polyamide kind of crosslinking agent emulsification system of epoxy resin applicable period is shorter, crosslinked coating flexibility is poor, poor impact resistance, coating of brittle of the modified polyamide class crosslinking agent performance is still not very ideal, therefore, used in waterborne epoxy emulsion crosslinking agent of crosslinking agent is mainly polyamine - epoxy adduct.
Common waterborne epoxy emulsion crosslinking agent were mostly to multiple amine crosslinking agent of chain extender, grafting, salt, in introducing a nonpolar molecule genes, making it a lipophilic epoxy resin molecular structure of water dispersible crosslinking agent, at the same time it as cationic emulsifier for epoxy resin emulsion, two component mixture can be made into a stable emulsion.
At present, more modified polyamide crosslinking agents are epoxy-polyamine admixture, and the commonly used preparation methods of epoxy modified polyamine crosslinking agent are generally divided into two types:
1) using ethylene polyamine and single epoxy or epoxy compound bonus, will be closed about 60% of the primary amine hydrogen, and then with the addition of by bisphenol A epoxy, achieve the appropriate water oil balance, then react with formaldehyde to further the primary amine hydrogen hydroxyl methylation, the crosslinking agent cross-linked epoxy system has good gloss, hardness and resistance to chemical character;
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine packingļ¼ 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 case of polyamine excess with bisphenol A epoxy adduct, then to aliphatic single epoxy or aromatic epoxides closed primary amine hydrogen, and synthetic after diluted with water or water-soluble organic solvent, the adduct to clarify the solution obtained in the end, part of adduct with acetic acid and amine hydrogen.
Such as Shimp with low molecular weight epoxy resin reaction with more ethylene amine to produce the polyamine - epoxy adduct, then through single epoxy compounds to end, with acetic acid and part of the secondary amine, to adjust the HLB of crosslinking agent and reduce the reactivity of crosslinking agent, suitable for longer periods. Later, some new ones were developed? Water-based crosslinking agent technology does not need to take organic acid into salt. Such as Stark using epoxy resin with the excessive benzene dimethylamine reaction generated between epoxy amine adduct, reacts with end carboxyl polyether glycol generate amide, amine, then through sealed end waterborne epoxy emulsion crosslinking agent.
It has low viscosity and is widely used in coatings and castings abroad. The domestic varieties of lipid cyclodimide are relatively few and remain to be developed.
Zhao jie, invented a kind of modified alicyclic amine epoxy crosslinking agent, formula composition for amine methyl amylamine 100 mol and glycidyl ester of glycidyl ether alkyl alcohol or organic acid such as epoxy resin raw materials such as reactive diluent composition 350 ~ 50 mol. The crosslinking agent can be cross-linked with epoxy resin for 40 ~ 60 min at room temperature. No further maturation is required.
Yan-hong xu to acrylonitrile to Michael reaction of alicyclic amine, aiming at some disadvantages of modified alicyclic amine, synthesized by a modified alicyclic amine epoxy crosslinking agent, applicable period is relatively short, could be completely without heat crosslinking. The modified crosslinking agent is used for the preparation of epoxy resin construction glue and the adhesive has good comprehensive performance.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
2) in the case of polyamine excess with bisphenol A epoxy adduct, then to aliphatic single epoxy or aromatic epoxides closed primary amine hydrogen, and synthetic after diluted with water or water-soluble organic solvent, the adduct to clarify the solution obtained in the end, part of adduct with acetic acid and amine hydrogen.
Such as Shimp with low molecular weight epoxy resin reaction with more ethylene amine to produce the polyamine - epoxy adduct, then through single epoxy compounds to end, with acetic acid and part of the secondary amine, to adjust the HLB of crosslinking agent and reduce the reactivity of crosslinking agent, suitable for longer periods. Later, some new ones were developed? Water-based crosslinking agent technology does not need to take organic acid into salt. Such as Stark using epoxy resin with the excessive benzene dimethylamine reaction generated between epoxy amine adduct, reacts with end carboxyl polyether glycol generate amide, amine, then through sealed end waterborne epoxy emulsion crosslinking agent.
It has low viscosity and is widely used in coatings and castings abroad. The domestic varieties of lipid cyclodimide are relatively few and remain to be developed.
Zhao jie, invented a kind of modified alicyclic amine epoxy crosslinking agent, formula composition for amine methyl amylamine 100 mol and glycidyl ester of glycidyl ether alkyl alcohol or organic acid such as epoxy resin raw materials such as reactive diluent composition 350 ~ 50 mol. The crosslinking agent can be cross-linked with epoxy resin for 40 ~ 60 min at room temperature. No further maturation is required.
Yan-hong xu to acrylonitrile to Michael reaction of alicyclic amine, aiming at some disadvantages of modified alicyclic amine, synthesized by a modified alicyclic amine epoxy crosslinking agent, applicable period is relatively short, could be completely without heat crosslinking. The modified crosslinking agent is used for the preparation of epoxy resin construction glue and the adhesive has good comprehensive performance.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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