Organophilic clays and thixotropic polyester compositions contai

Details Organophilic clays and thixotropic polyester compositions contai Organophilic clays and thixotropic polyester compositions contai

1978-03-27

1980-08-05

Person, Sandra M.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

252316, 428404, C08K 904

Patent

active

042161355

ABSTRACT:
Organophilic clays and thixotropic cross-linkable polyester compositions containing the same are provided comprising an unsaturated polyester and an unsaturated aromatic monomer such as styrene having dispersed therein an organophilic clay gellant comprising the reaction product of a smectite-type clay having a cation exchange capacity of at least 75 milliequivalents per 100 grams of clay and a methyl benzyl dialkyl ammonium compound or a dibenzyl dialkyl ammonium compound, said alkyl groups comprising long chain alkyl radicals having from 8 to 20 carbon atoms, wherein at least 5% of said long chains contain 8 to 14 carbon atoms and preferably at least 20% have 12 carbon atoms, the amount of said ammonium compound reacted with said clay being from 100 to 130 milliequivalents per 100 grams of clay based on 100% active clay.
The polyester commpositions are prepared by a pregel method in which the organophilic clay gellant is mixed with the unsaturated aromatic monomer under high shear to form a pregel and the pregel is then combined with an unsaturated polyester to form the thixotropic compositions.

REFERENCES:
patent: 2531427 (1950-11-01), Hauser
patent: 3537994 (1970-11-01), House
patent: 3974125 (1976-08-01), Oswald et al.
patent: 4081496 (1978-03-01), Finlayson
patent: 4105578 (1978-08-01), Finlayson et al.

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