Melt phase hydrosilylation of polypropylene
AssigneeUniversity of Waterloo
InventorsCostas Tzoganakis, Hauke Malz
Life of this patent
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Abstract
Branched copolymers of polypropylene (PP) and polysilanes are prepared by procedures involving melt phase hydrosilylation. Such branched copolymers may be formed in situ during the melt phase hydrosilylation or may be prepared by subsequent processing. The branched copolymers exhibit superior properties.
Claims22
A branched copolymer of polypropylene (PP) and methylhydrosiloxane-dimethylsiloxane random copolymer (MDMS) produced by melt phase hydrosilylation, wherein the ratio of PP to MDMS is such that the polymer contains free Si—H groups, said copolymer being coupled, through free Si—H groups, to an inorganic filler, inorganic surface, a hydroxy-containing polymer, vinyl-containing polymer or other polymer containing functional groups reactive with free Si—H.
A branched copolymer of polypropylene (PP) and a methylhydrosiloxane-dimethylsiloxane random copolymer (MDMS) produced by melt phase hydrosilylation, which is coupled to metallic, glass, ceramic or other vitreous surface.
A branched copolymer of polypropylene (PP) and methylhydrosiloxane-dimethylsiloxane random copolymer (MDMS) produced by melt phase hydrosilylation, wherein the ratio of PP to MDMS is such that the polymer contains free Si—H groups and wherein the free Si—H groups are cross-linked.
A process of forming a branched polypropylene, which comprises effecting melt phase hydrosilylation of a terminally-unsaturated polypropylene in the presence of a methylhydrosiloxane-dimethylsiloxane random copolymer (MDMS).
A process of forming a branched copolymer, which comprises:
- treating a polyolefin with peroxide to provide terminal unsaturation, and
- reacting the terminally-unsaturated polyolefin with a silicone polymer containing at least two Si—H groups in a melt phase reactive extrusion hydrosilylation reaction.
Dependencies are inferred from the claim text.