Back to results
US 4,051,199 AGranted
Epoxidized copolymers of styrene, butadiene and isoprene
AssigneePhillips Petroleum Company
InventorsKishore Udipi, Henry L. Hsieh
Life of this patent
Estimating the term…
Abstract
Epoxidized polymers having the structure S-D/S-S or D/S-S-D/S-S in which S represents a polystyrene block and D/S represents a tapered block of styrene and butadiene and/or isoprene, with the further provision that 5-95% of the olefinic unsaturation of the polymer has been epoxidized, exhibit good oil and ozone resistance.
Claims12
As a composition of matter, a polymer defined by the formula
- S-D/S-S
- in which S is a polystyrene block, D/S is a tapered copolymer block of styrene and an alkadiene selected from the group consisting of butadiene and isoprene having an alkadiene-rich end and a styrene-rich end of which the styrene-rich end is attached to one block S, with the further provision that 5-95% olefinic unsaturations in the D/S blocks have been removed by epoxidation.
A process for producing an epoxidized copolymer comprising
- a. contacting alopolymer defined by the formula
- S-D/S-S
- in which S is a polystyrene block, D/S is a tapered copolymer block of styrene and an alkadiene selected from the group consisting of butadiene and isoprene having an alkadiene-rich end and a styrene-rich end of which the styrene-rich end is attached to one block S, with an epoxidizing agent such as to remove 5-95% of the olefinic unsaturation of the tapered blocks D/S and
- b. recovering the epoxidized copolymer.
1 more element
Dependencies are inferred from the claim text.