News Details
The epoxy resin coating is used for the crosslinking agent of amides
2017-9-3 17:00:18
The epoxy resin coating is used for the crosslinking agent of amides
Diethyltoluenediamine Uses:
Elmore, etc to ethylene polyamine and epoxy resin (EP1001) reaction end amino epoxy amine adduct, reacts with end carboxyl polyether alcohol made an amide amine compounds, with single epoxy compound sealing and finally get a amide amine crosslinking agent.
Stark, etc will end carboxyl reaction polyether alcohol and fatty amine to produce the amide amine compound, and then react with epoxy resin epoxy compounds generated end, reacts with fatty amine, with single epoxy compounds end finally.
On the basis of g-328, the g-328 reacts with binary carboxylic acid to produce an amide crosslinking agent, which is a new type of water-based epoxy crosslinking agent with better performance.
After more than 20 years of development, now type II epoxy system already has quick drying, and excellent corrosion resistance, solvent resistance, flexibility, such as performance, its main performance is close to or even more than the solvent system. Because the traditional i-type epoxy system needs to be added to the polyethylene solvent to reduce the resin's Tg to facilitate the coalescence of the resin particles, the volatile organic solvents are introduced in the water-based epoxy system. A new type of water-based epoxy crosslinking agent with no need of coalescing solvent is developed for solid epoxy dispersion.
The crosslinking agent consists of two types of crosslinking agent with different reactive compound and into, including low reactivity of crosslinking agent (LMB6113) is a kind of water-soluble epoxy/amine adduct, solid mass fraction 80%, do not contain organic solvent, high reactivity of the crosslinking agent (XB3984) is a kind of modified water-soluble epoxy/amine adduct, solid mass fraction of 80%. The reactivity of crosslinking agent can be adjusted by adjusting the ratio of the two. The system has good corrosion resistance, especially for anti-corrosion primer.
Waterborne epoxy paint crosslinking agent is used with water-based epoxy resin. To improve the compatibility of epoxy resin and crosslinking agent, realize high performance, reduce the environmental pollution, and to meet the environmental requirements has become the research focus of this system. At present, there are few researches on the preparation of water-based epoxy crosslinking agent based on biomass resources.
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.
With abundant biomass resources, we should study and develop new water-based crosslinking agents with biomass resources. With the emerging of new technology, new process, believe in the near future many performance of waterborne epoxy coatings can fully achieve even more than the traditional solvent epoxy coatings, including room temperature crosslinking aqueous epoxy coatings have greater prospects for development.
The synthesis of polyamide is an important milestone in the development of polymer chemistry. Prior to this study, the international debate over the theory of polymer chain structure was mainly supported by the lack of clear and unsuspected experimental facts. The polycondensation reaction was not studied very much at that time, and the condensation was not complete.
Carrothers used far more than the usual method of organic synthesis, and when he was doing polymeric condensation, he had a strict ratio of the reactants to the reactants, with a difference of less than 1 percent. The degree of condensation is quite thorough, exceeding 99.5%, and thus synthesizing the polymer with a molecular weight of about 20,000.
Carothers studies have indicated that the polymer is a kind of real macromolecules, can be obtained from known organic reactions, the polycondensation reaction of each molecule contains two or more than two active group, these groups through covalent bond connection each other, not by a force not sure simple small molecules will be gathered together, which reveals the rule of polycondensation reaction.
Carrotherstone's study of polymerization reaction divides the polymer compounds into two main groups: one is the condensation polymer which is obtained by condensation polymerization; The other class is the addition of polymers, which are obtained by the addition of polymerization.
Carothers assistant Florida (1910 ~ 1986), Paul j. Flory polyamide are summarized and a series of polycondensation reaction, proposed the polycondensation reaction in 1939 all the activity of functional group has the same basic principle, and put forward the polycondensation reaction kinetics and molecular weight and the quantitative relationship between polycondensation reaction.
The synthesis of polyamide is a powerful demonstration of the existence of macromolecules, so that the theory of staudingg is firmly established and the polymer chemistry has been established.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Spanish
French
Italian
Portuguese
Japanese
Korean
Arabic
Russian