Polymeric Compositions and Polymerization Initiators Using Photo-Peroxidation Process
AssigneeFina Technology, Inc.
InventorOlga Khabashesku
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Abstract
A rubber-modified polymeric composition having predominately core-shell morphology is disclosed. The rubber-modified polymeric composition can be a polystyrene comprising styrene, polybutadiene, and a high-grafting initiator formed by contacting singlet oxygen with an olefin containing an allylic hydrogen or a diene to form a hydroperoxide or peroxide. The singlet oxygen can be formed by contacting ground state oxygen with a photo catalyst, such a photosensitive dye exposed to light.
Claims28
A rubber-modified polymeric composition comprising:
- a matrix phase of a polymer of an aromatic monomer;
- and
- a grafted rubber copolymer;
- the grafted rubber copolymer formed from the grafting of peroxides along a rubber copolymer chain by a high-grafting initiator;
- the initiator formed by contacting ground-state oxygen with an activated donor to produce singlet oxygen and contacting said singlet oxygen with an olefin containing either an allylic hydrogen or a diene, such that the olefin forms a high-grafting peroxide initiator.
A method for making a rubber-modified polymeric composition comprising:
- preparing a polymerizable mixture comprising monovinyl aromatic monomer, rubber copolymer, and a high-grafting initiator;
- and
- polymerizing the mixture under reaction conditions;
- wherein the high-grafting initiator is formed by contacting ground-state oxygen with an activated donor to produce singlet oxygen and contacting said singlet oxygen with an olefin containing either an allylic hydrogen or a diene, such that the olefin forms a high-grafting peroxide initiator;
- wherein the high-grafting initiator facilitates grafting of monovinyl aromatic polymer along the rubber copolymer chain.
A high-impact polystyrene comprising styrene and polybutadiene having predominately core-shell morphology;
- wherein the polybutadiene is highly-grafted by contacting ground-state oxygen with an activated donor to produce singlet oxygen;
- and
- contacting said singlet oxygen with polybutadiene to form hydroperoxides along the polybutadiene chain.
Dependencies are inferred from the claim text.