Diterminally silanol-modified perfluoropolyether compound and preparation thereof
AssigneeShin-Etsu Chemical Co., Ltd.
InventorMasato Kawakami
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Abstract
Diterminally silanol-modified perfluoropolyether compounds of the general formula (1) (wherein each R1 is independently an unsubstituted divalent hydrocarbon group of 1 to 10 carbon atoms, each R2 is independently a substituted or unsubstituted monovalent hydrocarbon group of 1 to 10 carbon atoms, Rf is a perfluoropolyether group, and ‘n’ is independently at each occurrence an integer from 0 to 8) are provided. Such compounds, when reacted as an intermediate with a reactive silicon compound, afford compounds of excellent durability.
Claims4
A diterminally silanol-modified perfluoropolyether compound of general formula (1) below
- wherein each R1 is independently an unsubstituted linear alkenylene group or a branched alkenylene group of 2 to 10 carbon atoms, each R2 is independently a substituted or unsubstituted monovalent hydrocarbon group of 1 to 10 carbon atoms, Rf is a perfluoropolyether group, and the subscript ‘n’ is independently at each occurrence an integer from 1 to 7.
A method for preparing the diterminally silanol-modified perfluoropolyether compound of general formula (1) below:
- wherein each R1 is independently an unsubstituted divalent hydrocarbon group of 1 to 10 carbon atoms, each R2 is independently a substituted or unsubstituted monovalent hydrocarbon group of 1 to 10 carbon atoms, Rf is a perfluoropolyether group, and the subscript ‘n’ is independently at each occurrence an integer from 0 to 8,
- comprising reacting a perfluoropolyether compound of general formula (2) below having unsaturated bonds at both ends;
- wherein each R3 is independently an unsubstituted monovalent hydrocarbon group of 2 to 10 carbon atoms that has a terminal unsaturated bond, and Rf is as defined above;
- with a silanol group-containing hydrosilane compound of general formula (3) below
- wherein each R4 is independently a substituted or unsubstituted monovalent hydrocarbon group of 1 to 10 carbon atoms, and ‘p’ is an integer from 0 to 8 in the presence of a platinum catalyst.
Dependencies are inferred from the claim text.