Dow Corning Corporation

Diazem Corporation

Other

Yung K Kim

Charles Edmund Skinner

William Henry Campbell

Michael O Riley

Philip L Carter

Chi-long Lee

David Joseph Romenesko

Gerald A Gornowicz

Igor Chorvath

Lauren Marie Tonge

Kermit S Kwan

Stephen Clay Warren

Gary M Ronk

Multi-layered macromolecules wherein the layers are covalently bonded together and wherein the macromolecules are covalently bonded to solid particulate substrates, methods for the preparation of such compositions, and methods for their uses in a multitude of end use applications ranging from the purification of waste chemical and metal process streams to the separation and identification of proteins, peptides, and oligionucleotides.

Multi-layered macromolecules and methods for their use

A method is disclosed for preparing an elastomeric base composition comprising: (I) mixing (A) a fluorocarbon elastomer with (B) a compatibilizer, (C) an optional catalyst, (II) mixing the product of step (I) with (D) a silicone base comprising a curable organopolysiloxane, (E), an optional crosslinking agent, (F) a cure agent in an amount sufficient to cure said organopolysiloxane; and (III) dynamically vulcanizing the organopolysiloxane, wherein the weight ratio of fluorocarbon elastomer (A) to silicone base (B) in the elastomeric base composition ranges from 95:5 to 30:70. The cured rubber compositions obtained from the elastomeric base compositions herein have good fuel resistance properties.

Fluorocarbon elastomer silicone vulcanizates

Fluorocarbon siloxanes of the formula ##STR1## ARE DISCLOSED. Their use as reversion resistant curing agents in curable compositions comprising reversion resistant siloxanes of the formula ##STR2## are also disclosed.

Fluorocarbon siloxane compositions

Mixing a fluorinated surfactant with a silicone foam composition decreases the density of the cured foam. Increasing the amount of fluorinated surfactant decreases the foam density. Silicone compositions comprising a hydroxylated organosiloxane, an organohydrogensiloxane, a platinum catalyst and a fluorinated surfactant cure to foams with lower densities than the same compositions without the fluorinated surfactant. The cured foams can be used in the same applications as other silicone foams.

Method of reducing the foam density of silicone foams and compositions

Polymers which are flexible down to -40.degree.F. and which do not depolymerize appreciably when heated in a closed space at 500.degree. F. or above have the structure ##EQU1## These polymers can be cured to rubbers which are solvent resistant and are flexible over a wide temperature range. Such rubbers are useful for sealing aircraft fuel tanks.

Low temperature reversion resistant organosilicon polymers

Growing community of inventors

Midland, MI, United States of America

Yung K Kim