The five basic ASTM classifications are methyl silicone
(MQ), methyl-vinyl silicone (VMQ), methyl-phenyl silicone (PMQ), methyl-phenyl-vinyl silicone (PVMQ) and fluoro-vinyl-methyl silicone
Some aqueous methyl silicone
resin dispersions have been developed and are used to modify acrylic latex in architectural coatings for building facades.
Copolymers based on methyl silicone and polyether chemistries are also popular.
In addition, extensive testing on aquatic plant and animal life has revealed no ecologically significant adverse effects from these methyl silicones, even under highly exaggerated conditions of exposure.
The molecular size of the nonvolatile methyl silicones renders them too large to pass through biological membranes.
The KER Series is a methyl silicone
based system which hardens by using a heat cured platinum catalyst.
rubber (original material commercial product);
Eugene Rochow at General Electric began experimenting with silibones and also on a practical route towards methyl silicones