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AssigneeKraton Polymers LLC
InventorsRuidong Ding, Jason Tian, Hannes Hendrik Peter van Erp, Chad Reiter
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The disclosure relates to methods for producing poly(cyclohexadiene) homopolymers (PCHD). The PCHD is formed by polymerizing a 1,3-cyclohexadiene monomer in the presence of a catalyst, in a hydrocarbon solvent, and at a temperature of −100° C. to 120° C. The catalyst is selected from the group consisting of a Bronsted acid, a Lewis acid, and combinations thereof. PCHD produced under these conditions has good solubility in non-polar solvents, and a number average molecular weight of 300 to 5,000 Dalton; a weight average molecular weight of 5,000 to 15,000 Delton; and a polydispersity index of 3.0 to 8.0. The PCHD is useful for producing crosslinked materials having good physical properties. The crosslinked materials can be combined with a rubbery polymer to produce compositions valuable for further downstream uses.
A poly(1,3-cyclohexadiene) homopolymer formed by cationic polymerization of a 1,3-cyclohexadiene monomer feedstock in the presence of a catalyst, wherein:
The crosslinked polymer of claim 11, wherein the crosslinking agent is S2Cl2, and wherein the crosslinked polymer has a crosslinking density corresponding to reaction of 1-10 molecules of S2Cl2 per 100 polymerized 1,3-cyclohexadiene units.
The prepreg composition of claim 13, wherein the rubber polymer rubber comprises an unsaturated diene elastomer selected from polybutadienes, natural rubber, synthetic polyisoprenes, butadiene copolymers, isoprene copolymers, and mixtures thereof.
A method for producing a poly(1,3-cyclohexadiene) homopolymer, the method comprising:
Dependencies are inferred from the claim text.