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A tertiary amine coating crosslinking agent
2017-7-5 23:34:32
A tertiary amine coating crosslinking agent
Tertiary amine is the compound that the three hydrogen atoms in ammonia are replaced by other groups, so their reactive activity is different.
When it is used separately as a crosslinking agent, it is usually 5 to 15 percent of the quality of the resin. The most common use of tertiary amines is as a promoter of cross-linking agents such as fatty polyamine, aromatic polyamide, polyamide resin and acid anhydride.
Tertiary amine crosslinking agent to promote the effect of crosslinking reaction and its electron density on the nitrogen atoms in the molecular structure and molecular chain length, the greater the electron density of nitrogen atom, the shorter the chain, to promote the better.
2 minus 2-3 (dimethyl amino methyl) phenol (TAP) : sometimes also known as crosslinking DMP - 30 or K54 accelerator, is light yellow transparent liquid, the boiling point of 250 ℃, the relative molecular mass of 265.40, relative density 0.98, soluble in organic solvent, the cold water.
The dosage of bisphenol A epoxy resin with epoxy-equivalent of 185 ~ 195 is 10%, and the dosage of the promoter is 0.1 ~ 3%. Used for epoxy resin-liquid polysulfide system is the normal temperature crosslinking amount of 10 ~ 15%, heating crosslinking amount of 6%. It can also give the system adhesive, casting and sealing material unique performance. At room temperature, it's gel at a much faster rate than polyamide.
DMP - thirty three (2 -) ethyl caproic acid salt: 30 separate DMP - gel speed, when used as a crosslinking agent for period is short, when used in casting operation inconvenience, it made tertiary amine salt, can extend shelf life, and reduce the heat of reaction. The tertiary amine salt of epoxy equivalent to 185 ~ 195 of bisphenol A epoxy resin for 10 to 12%, there are 7 d in 21 ℃ period of application of the tertiary amine salt, low toxicity. The thermal deformation of crosslinking is not high. This product has excellent electrical properties and can be used for sealing and casting parts of electrical components.
DMP - 30 three oleate: relative molecular mass of 1112.80, the tertiary amine salt as viscous transparent liquid, with a slight odor, boiling point of 120 ~ 125 ℃. Soluble in benzene, gasoline, tetrahydrofuran, acetic acid, etc., the melt water is limited, volatile small, nitrogen content 3.4 ~ 3.8%. It is used as a low-temperature crosslinking agent for epoxy resin, and the composition of epoxy resin is stable, which can be mixed with other acid characteristics, and the dosage of epoxy resin is 10-12%.
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.
Benzyl dimethylamine (BDMA) : for liquid, of bisphenol A type EP was 15%, the dosage of 3 h at room temperature or crosslinking 0.5 h under 80 ℃. A cross-linking agent commonly used as an acid anhydride, with a dose of 1%.
Triethylamine, the amount of resin used is 10%, at room temperature is longer than 7h, after six days.
Triethanolamine, liquid dosage is 10%, in 120 ~ 140 ℃ / 4 ~ 6 h crosslinking.
Adjacent hydroxy benzyl dimethylamine (DMP - 10), a liquid, 2 h at room temperature, or 0.5 h under 80 ℃ crosslinking.
Both organic acylhydrazine and dicyandiamide have the same properties, both of which belong to the functional sleeper agent, which is the powder of the high melting point, which is usually prepared by methyl carboxylate and hydrazine. If the hydrazine is dispersed in epoxy resin, the use period is over 4 months, and the heat can be quickly crosslinked.
Hydrazide end two lively hydrogen nitrogen atoms, but as primary amine and epoxy group in addition reaction, the generated can't afford to tertiary amine polymerization catalysis, so dose must be calculated on chemical equivalent, not like dicyandiamide can reduce the dosage of crosslinking temperature was lower than those of dicyandiamide, too. And different kinds of hydrazine, the crosslinking temperature is different.
Hydrazide end two lively hydrogen nitrogen atoms, but as primary amine and epoxy group in addition reaction, the generated can't afford to tertiary amine polymerization catalysis, so dose must be calculated on chemical equivalent, not like dicyandiamide can reduce the dosage of crosslinking temperature was lower than those of dicyandiamide, too. And different kinds of hydrazine, the crosslinking temperature is different.
The bending strength of acylhydrazine is about 100MPa, which is roughly the same as amine crosslinking agent. Heat resistance is higher than the corresponding amine crosslinking agent, such as IPADH Tg at 180 ℃, AADH Tg at 160 ℃. The acylhydrazine crosslinking temperature is lower than that of DI - CY, with excellent water resistance, not settling in the crosslinking process, and generally good adhesion.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
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