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US 11,078,335 B2Granted
Method for preparing a graft copolymer with a polyolefin backbone and polyorganosiloxane pendant groups
AssigneeDow Silicones Corporation
InventorsSteven Swier, Zachary Kean, John B. Horstman
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Abstract
A method for preparing a graft copolymer having a polyolefin backbone and polyorganosiloxane pendant groups can be catalyzed by a Lewis Acid catalyst, Piers-Rubenstzjan catalyst, or hydrosilylation reaction catalyst. The graft copolymer prepared by the method is useful as a thermoplastic elastomer or as a compatibilizer in compositions containing both a polyolefin and a polyorganosiloxane.
Claims13
A method for preparing a copolymer comprising:
- 1) combining starting materials comprising
- A) a silane grafted polyolefin comprising units of formulae
- where each R is independently selected from a monovalent hydrocarbon group of 1 to 18 carbon atoms or a monovalent halogenated hydrocarbon group of 1 to 18 carbon atoms, each R1 is independently a divalent hydrocarbon group of 2 to 50 carbon atoms, each R5 is independently selected from R or OR, and each R15 is independently H, a monovalent hydrocarbon group of 1 to 18 carbon atoms or a monovalent halogenated hydrocarbon group of 1 to 18 carbon atoms, subscript m≥1, and subscript n≥1;
- B) a polyorganosiloxane of formula
- where R6 is H;
- and each R7 is independently selected from R and R6;
- C) a Lewis acid catalyst;
- and
- D) a solvent;
- thereby preparing a reaction product comprising a graft copolymer.
7 more elements
A method for preparing a copolymer comprising:
- 1) combining starting materials comprising
- A) a silane grafted polyolefin silane grafted polyolefin comprising units of formulae
- where each R is independently selected from a monovalent hydrocarbon group of 1 to 18 carbon atoms or a monovalent halogenated hydrocarbon group of 1 to 18 carbon atoms, each R1 is independently a divalent hydrocarbon group of 2 to 50 carbon atoms, each R8 is selected from R and H, subscript m≥1, and subscript n≥1;
- B) a polyorganosiloxane formula
- where R9 is selected from OR or OH, and each R10 is independently selected from R and R9 and subscript o is 5 to 500;
- C) a Lewis acid catalyst;
- and
- D) a solvent.
5 more elements
Dependencies are inferred from the claim text.