C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 81/00 (2006.01) C08F 287/00 (2006.01) C08G 63/91 (2006.01) C08G 81/02 (2006.01) C08J 5/06 (2006.01) D04H 1/64 (2006.01)
Patent
CA 2090388
ABSTRACT A block copolymer of generally an AB, ABA, or A(BA)n structure, or mixtures thereof where the A block is an unsaturated polyester, the B block is a flexible polymer having a Tg of 0°C or lower, and n is 2 to 5. The various block components are generally first sepa- rately prepared as polymers with the flexible polymer generally having 1 or 2 functional end groups such as an amine group, a carboxyl group, or a hydroxyl group with the later being preferred. Alternatively, for low molecular weight unsaturated polyester blocks, the block can be made in situ. The preferred reaction route is to react a mono or dihydroxy terminated flexible polymer with a diisocyanate which subsequently can be readily reacted with the polyester. The block copolymers can be utilized as toughening agents. They furthermore can be utilized to coat a fiber structure such as individual fibers, a woven structure, or a nonwoven structure such as mats, rovings, bundles, and the like, with the coated fiber structures subsequently incorporated into a polymeric matrix such as polyester.
Hargis I. Glen
Lajudice Kevin P.
Mcbain Douglas S.
Melby Earl G.
Raterman Andrew L.
Gencorp Inc.
Ridout & Maybee Llp
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