Time：2018/9/14 Check：26
Abstract: to study the non tin catalyst and tin-butadiene styrene tin and catalyst dosage with polyester resin for powder coating of catalytic esterification activity, the influence of polyester resin molecular weight and its distribution, focuses on the preparation of TBT and catalyst dosage on the synthesis of polyester resin powder coating to heat and aging performance impact, eventually determine appropriate tin catalyst varieties and dosage.
Key words: the tin catalyst; Polyester resin; Powder coating; performance
Chinese library classification number: TQ633 literature identifier: A article number: 1007-9548 (2013) 01-0019-04
The powder coating with polyester resin manufacturers around the world mainly selects the tin compounds used as catalyst for the esterification reaction with polyester resin, catalyst in catalytic reaction, its itself will be permanently in polyester resin molecular structure, and precipitation gradually as time migration to the surface, and biology have mutagenic effect on the environment.
With the increase of environmental pressure in our country, in the reaction of synthetic resin, with no pollution to the environment or low pollution catalyst become the problem that there is an urgent need to solve. At present the main use of titanium is a catalyst and the tin catalyst, including titanium catalyst is easy to hydrolysis, poor stability, long used to synthesis of polyester resin reaction time, the problem of color yellow, there are many technical problems to be solved, have not been able to large-scale promotion of use. Rather than the TBT class catalyst change hydrocarbyl structure and main types, thereby reducing the effects of environmental damage. Larger foreign trade market in China, on the other hand, the EU in 2010 (EU) 276/2010 (REACH) regulations, puts forward a new limit the use of organotin compounds, usage cannot be more than 0.1%. In order to adapt to the new change, the domestic polyester resin powder industry are currently in the study does not contain tin with catalyst powder coating resin production. Organotin compounds are two kinds of tin and carbon element directly combined with metal organic compound, which is formed by the general formula for RnSnX4 - n, in the general formula, the most poisonous organic tin compounds n = 3, n = 1 and n = 2 times of organotin compounds toxicity, n = 4 of organotin compounds is of low toxicity or non-toxic. R based on the properties of compounds in general formula has great effect on the toxicity, when R is propyl or butyl, its biological activity, the strongest influence is the largest. In this paper, we study the toxicity of C - 01 catalyst, the largest C - 02, C - 03, C - 04.
