Random block copolymers

Details Random block copolymers Random block copolymers

2007-07-10

2007-07-10

Lipman, Bernard (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C528S076000

Reexamination Certificate

active

10805494

ABSTRACT:
A linear random block copolymer comprising segments of polyethylene oxide and a relatively more hydrophobic polymer, e.g. polypropylene oxide connected by hydrophobic segments containing urethane and urea groups formed from the reaction of a di-isocyanate and a diamine, wherein the diamine comprises less than 2% by weight of the total weight of the reactants used in the preparation of the copolymer.

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Yu, J. et al, “Blood interactions with novel polyurethaneurea hydrogels”; Biomaterials, vol. 12, No. 12;pp. 119-120 (Mar. 1991).

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