Uniroyal Chemical Company, Inc.

Crompton Gmbh

Lanxess Corporation

Chemtura Corporation

Thomas H Peter

William D Sigworth

Richard L Palinkas

Matthew P Burdzy

Vincent J Gajewski

George H Nybakken

Ian Laskowitz

Charles F Mallon

The present invention relates to sealing elements for blowout preventers comprising a sealing interface region, and a second region, wherein said sealing interface region is formed of a first polymer and said second region is formed of a second polymer, the first and second polymers having different Shore A hardnesses, including sealing elements made of dual hardness polyurethane.

Dual hardness sealing elements for blowout preventer

Disclosed herein is a composition comprising an aromatic diamine that is a solid at room temperature and a stabilizing quantity of a hindered amine light stabilizer and its use as a polyurethane curing agent.

Aromatic diamine polyurethane curatives with improved stability

High friction polyurethane elastomers having improved abrasion resistance

Low cost, resilient, shear resistant polyurethane elastomers for golf ball covers

High resilience, high clarity polyurethane elastomer

Clear, resilient polyurethane elastomers

A signal transmission device comprising an encapsulated segment produced by a method which comprises contacting the segment of the signal transmission device with an effective amount of a room-temperature curable composition comprising:

Composition for encapsulating signal transmission devices

A polyurethane elastomer possessing high resilience and high clarity is obtained by subjecting to polyurethane elastomer-forming conditions a polyurethane elastomer-forming reaction mixture comprising:

A method for encapsulating segments of signal transmission devices such as splices, pressure blocks and end blocks with a room-temperature curable composition comprising: (1) a hydroxy-functional compound having a molecular weight of greater than 500 and a hydroxy functionality of 2 or more; (2) an epoxy-functional compound having an epoxy functionality of 2 or more; and (3) a curative catalyst, in an amount effective to crosslink the epoxy and hydroxy components of the respective epoxy-functional and hydroxy-functional compounds.

A room-temperature curable composition useful for encapsulating transmission signal devices, comprising: (1) a hydroxy-functional compound having a molecular weight of greater than 500 and a hydroxy functionality of 2 or more; (2) an epoxy-functional compound having an epoxy functionality of 2 or more; and (3) a curative catalyst, in an amount effective to crosslink the epoxy and hydroxy components of the respective epoxy-functional and hydroxy-functional compounds. The composition is useful for encapsulating segments of signal transmission devices such as splices, pressure blocks and end blocks.

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Southbury, CT, United States of America

Thomas H Peter