Since the active component is the key component of the catalyst, the solid catalyst materials can be classified according to the chemistry state of the active component, and currently there are mainly metal catalysts, metal oxide catalysts, sulfide catalysts, acid-base catalysts and complex catalysts.
The same film-forming aid has different distribution coefficients due to the different composition and structure of the emulsion.
The film-forming aid should also have good hydrolysis stability and compatibility with the emulsion, try to have no other side effects, and have a low freezing point, environmental protection and low odor, wax dispersion group preferably odorless.
Composition and structure of film forming aids
Because the properties of the material are determined by its composition and structure, as well as the film-forming aids, the composition and structure of the film-forming aids should be introduced.
Commonly used film forming aids include Texan ol, Lusolvan FBH, Coa sol, D BE-IB, DP nB, DOWAN OLP Ph, drunk ester-12, etc., and Texan ol is often used as a benchmark for comparison.
K.Ala happe ruma and J.E.Glass LJ believe that it is known that some film-forming aids are mixtures, and it is likely that all commercial film-forming aids are not single-component, but mixtures.
The chemical name of Texan ol is 2, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, a product of Eastman Company, and its structural formula is as follows:
CH, OHCH, CHy
LusolvanFBH, Coa sol and D BE-IB are all mixtures of diisobutyl succinate, diisobutyl glutarate and diisobutyl adipate, and their structural formula is as follows:
CH, CH-CHoC (CH: .C-O-CH: -CH-CH,
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