Epoxidized solid elastomeric copolymers

Details Epoxidized solid elastomeric copolymers Epoxidized solid elastomeric copolymers

1996-10-22

1998-05-05

Warzel, Mark L.

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

Synthetic resins

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

C08F29704

Patent

active

057475989

ABSTRACT:
An epoxidized linear block copolymer which prior to epoxidation comprises at least one triblock I--B--I, wherein I is a block of a polymerized conjugated diene of at least 5 carbon atoms, such as isoprene, and B is a block of a polymer of a conjugated diene, different from that polymerized to form the I blocks, of at least 4 carbon atoms, such as 1,3-butadiene. The B block may be selectively hydrogenated before or after epoxidation so that they contain substantially no ethylenic unsaturation, while the epoxidation reaction forms epoxy groups from double bonds in the I blocks. Also disclosed is an alternative epoxidized solid linear block copolymer which prior to epoxidation contains at least one triblock wherein the first polymer block is a copolymer of an aryl-substituted olefin, such as styrene, and the conjugated diene used to polymerize the block I, the second or middle block is a polymer of the diene used to polymerize the block B, and the third polymer block is the same as the first polymer block. In this alternative copolymer, the middle block may also be selectively hydrogenated, so that it contains substantially no ethylenic unsaturation while the epoxidation reaction forms epoxy groups from double bonds in the first and third blocks. The disclosure also includes epoxidized solid linear random copolymers and solid star-branched block and random copolymers made from the same monomers as the linear block copolymers, and methods for producing the foregoing epoxidized polymers.

REFERENCES:
patent: 3448174 (1969-06-01), Loveless et al.
patent: 4879349 (1989-11-01), Hoxmeir
Die Angewandte Makromelekulare Chemie 21 (1972) 17-23 (Nr. 286) "Synthesis and Properties of Ethylene, Isoprene and Ethylene, Isoprene, Styrene Block Polymers" by John Carl Falk and R.J. Schlott.
Journal of Polymer Science: Part A-1, vol., 9, 2617-2623 (1971) "Coordination Catalysts for the Selective Hydrogenation of Polymeric Unsaturation",by John Carl Falk, Roy C. Ingersoll Research Center, Borg-Warner Corporation.
Polymer, 1982, vol. 23, Sep. pp. 1523-1535, "Hydrogenated Linear Block Copolymers of Butadiene and Isoprene; Effects of Variation of Composition and Sequence Architecture on Properties ", by Y. Mohajer, G.L. Wilkes, I.C. Wang, and J.E, McGrath.

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