Organotin catalyst T-12 DABCO T-12 (dibutyltin dilaurate) is an organotin compound with a high boiling point which is used as an efficient catalyst in the manufacture of polyurethane foams, coatings, adhesives and sealants. This product has been specially treated to be liquid at 18°C.
The biggest influence on the size of the good dispersion zone and the flocculation zone is the size of the latex particles, the electrolyte concentration, and the type and concentration of the film-forming aids. In the test concentration range, when using polyoxyethylene non-ionic surfactants, such as Trt onX-100, the phase diagram only has a bridge flocculation zone and a well-dispersed zone, but no vacant flocculation zone.
The interaction of film-forming aids, co-solvents and associative thickeners is related to their hydrogen bonding parameters. Solvents with large hydrogen bonding parameters and good water miscibility generally cause a decrease in viscosity due to their interaction with associative thickeners, such as propylene glycol and ethylene glycol. Solvents with small hydrogen bonding parameters and insoluble in water generally increase the viscosity, such as Texan ol.
Choice of thickener
From the above analysis of the thickening mechanism and characteristics of various thickeners, we can get such a conclusion: any type of thickener has its own characteristics. In the thickening system of coatings, if only one thickener is used, It is difficult to achieve the unity of long-term storage stability, good construction effect and ideal coating appearance. Generally, in the coating thickening system, most of the two thickeners are used in combination to achieve a more ideal effect.
The selection principle of cellulose thickener, the choice of Clariant wax (formerly Hoechst) Ty sose type cellulose ether thickener.
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