General Electric Company

Other

General Electric Silicones

John J Dziark

Gary M Lucas

Alfred H Smith, Jr

Chiu-Sing Lin

Michael R Pink

Alfred G Sanford

Kazuto Shinohara

John P Martucci

Robert L Nelson

A method for producing a room temperature vulcanizable composition that has a high rate of extrusion and a low sag wherein a base mixture of a diorganopolysiloxane and an end stopping cross linking ketoximosilane are reacted prior to being added to a first injection port along an extruder, an inorganic filler being added to said base mixture at a second injection port along the extruder, an M stopped silicone fluid being partitioned into two parts and the first part of said M stopped fluid being added to the filler containing base mixture at a third injection port at the middle of the extruder, and a tin catalyst, an adhesion promoter and the second part of the M stopped fluid being added at a fourth injection port along the extruder said mixture comprising these components being extruded towards the extruder exit port.

One part room temperature vulcanizing composition having both a high

The present invention relates to acetoxy, ketoximo, and alkoxy silicone sealants suitable for use in various sealant applications and additionally food contact applications comprising di-iodomethyl-para-tolylsulfone and having physical properties improved thereby.

Silicone sealants

A method for continuously producing a room temperature vulcanizable composition is disclosed. A base mixture of a silanol stopped fluorosilicone polymer, a silica filler and iron oxide are processed in an extruder at an elevated temperature between about 50.degree. and 200.degree. C. Thereafter, a tin based catalyst, an acetoxy cross-linking agent and an optional adhesion promoter are added to the extruder near the exit port. The resulting material has improved storage stability.

Shelf-stable one-part room temperature vulcanizing fluorosilicone

A method for continuously producing a room temperature vulcanizable composition is disclosed. A base mixture of a silanol stopped fluorosilicone polymer, a silica filler and iron oxide are processed in an extruder at an elevated temperature between about 50 and 200.degree. C. Thereafter, a tin based catalyst, an acetoxy cross-linking agent and an optional adhesion promoter are added to the extruder near the exit port. The resulting material has improved storage stability.

A stable, one-package, silicone RTV composition convertible to a tack-free elastomer comprising:

Scavengers for ammonia in RTV compositions

A self-bonding alkoxy-functional one-component RTV composition which contains as a self-bonding additive a silane which is functionalized by radicals selected from amino, ether, epoxy, isocyanato, cyano, acryloxy, and acyloxy. Such a composition is also shelf-stable and substantially non-corrosive.

Adhesion promoters for one-component RTV silicone compositions

The present invention relates to an alkoxy-functional one-component RTV silicone rubber composition with improved adhesion to polyacrylate plastics. The improved adhesion is obtained by utilizing in the composition a pre-reacted mixture having therein the adhesion promoter, silane scavenger and tin condensation catalyst. Optionally there may also be in the mixture, a polyalkoxysilane cross-linking agent.

One-component RTV silicone rubber compositions with good self-bonding

A method is provided for repairing or preventing the faulting phenomenon in unreinforced concrete highways. Flowable, foamable, curable compositions are injected into the transverse joint between concrete slabs to fill any voids that exist between or under the slabs, and to fix loose incompressible 'fines' which are forced beneath the slabs.

Method for repairing or preventing faulting on concrete highways

The present invention relates to an alkoxy-functional one-component RTV silicone rubber composition which is shelf-stable and fast-curing. The composition is formed by reacting a silanol-terminated polysiloxane polymer with an alkoxy-functional cross-linking agent in the presence of a condensation catalyst. The present invention lies in the use of silicon-nitrogen compounds and silicon-nitrogen polymers as scavengers for unendcapped hydroxy groups in the above polyalkoxy-functional RTV systems. A preferred silicon-nitrogen compound is hexamethyldisilazane.

Scavengers for one-component alkoxy-functional RTV compositions and

The present invention relates to dimedone functional self-bonding room temperature vulcanizable silicone rubber compositions. The self-bond additive is selected from silyl maleates, silyl fumarates, silyl succinates, silyl isocyanurates and mixtures thereof. Preferably the self-bonding additive is prereacted with the cross-linking agent before they are incorporated into the RTV composition. This prereaction of the self-bonding additive and the cross-linking agent imparts shelf-stability to the composition.

Self-bonding one-component dimedone RTV silicone rubber compositions

A shelf-stable catalyst composition for a one-part room temperature vulcanizable silicone rubber composition comprising the reaction product of an adhesion promoter selected from the class consisting of silyl maleates, silyl fumarates, silyl succinates, silyl isocyanurates and silyl cyanurates and with an acyloxy functional cross-linking agent.

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Ballston Spa, NY, United States of America

John J Dziark