Polyurethane bend stiffener

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9339948
APP PUB NO 20150246465A1
SERIAL NO

14427250

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A bend stiffener comprises a (i) a flexible polymeric sleeve having an axial bore for receiving an elongated flexible member and (ii) attachment means for attaching the sleeve to a support. At least a portion of the flexible polymeric sleeve is a polyurethane elastomer produced in a reaction of an isocyanate-terminated prepolymer and a curing agent at an isocyanate index of 90 to 120. The isocyanate-terminated prepolymer has an isocyanate content of 7 to 15% by weight and is a reaction product of at least one aromatic polyisocyanate and at least one polyether polyol having a hydroxyl equivalent weight of 350 to 2000 and a nominal functionality of 2 to 2.3. The curing agent is one or more chain extenders having an equivalent weight per isocyanate-reactive group of up to 125 or a mixture of one or more such chain extenders and one or more polyether polyols having a hydroxyl equivalent weight of 350 to 2000 and a nominal functionality of 2 to 2.3. The hard segment content of the polyurethane elastomer is from 40 to 60% by weight.

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Patent Owner(s)

Patent OwnerAddress
DOW GLOBAL TECHNOLOGIES INCWASHINGTON STREET 1790 BUILDING MIDLAND MI 48674

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Davies, Andrew Martin Aston-under-lyne, GB 1 0
Moss, Robert M Glossop, GB 5 38
Mycock, Ian Robert High Peak, GB 2 3
Roberts, Gareth Stockport, GB 54 504

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