Fluorinated polysiloxane, making method, and fiber or fabric treating agent composition
AssigneeShin-Etsu Chemical Co., Ltd.
InventorNaoki Omura
Life of this patent
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Abstract
A fluorinated polysiloxane having at least one unit of the following general formula (1) and containing at least one aminoalkyl group attached to a silicon atom in a molecule is novel. R1 is a monovalent hydrocarbon group of 1-20 carbon atoms, R2 is a monovalent hydrocarbon group containing at least three fluorine atoms, R3 is an organoxy group: —OR1, and p is 2 to 200. When fibers are treated with the fluorinated polysiloxane, it imparts excellent water and oil repellency and good texture.
Claims18
A fluorinated polysiloxane comprising at least one unit of the following general formula (1) and containing at least one aminoalkyl group attached to a silicon atom in a molecule,
- wherein R1 is a substituted or unsubstituted monovalent hydrocarbon group of 1 to 20 carbon atoms, R2 is a monovalent hydrocarbon group containing at least three fluorine atoms and R2 is present in said fluorinated polysiloxane in an amount that provides said fluorinated polysiloxane with a fluorine content of at least 5% by weight, R3 is an organoxy group represented by —OR1 wherein R1 is as defined above, and p is a positive number of from 2 to 200.
A fluorinated polysiloxane having at least one terminal group of the following general formula (2) and containing at least one aminoalkyl group attached to a silicon atom in a molecule,
- wherein R1 is a substituted or unsubstituted monovalent hydrocarbon group of 1 to 20 carbon atoms, R2 is a monovalent hydrocarbon group containing at least three fluorine atoms, R3 is an organoxy group represented by —OR1 wherein R1 is as defined above, and p is a positive number of from 2 to 200.
A fluorinated polysiloxane comprising at least one unit of the following general formula (1) and containing at least one aminoalkyl group attached to a silicon atom in a molecule,
- wherein R1 is a substituted or unsubstituted monovalent hydrocarbon group of 1 to 20 carbon atoms, R2 is a group represented by the following general formula (3):
- —CH2CH2CnF2n+1 (3)
- wherein n is a positive number of at least 3, R3 is an organoxy group represented by —OR1 wherein R1 is as defined above, and p is a positive number of from 2 to 200.
A method for preparing a fluorinated polysiloxane comprising the step of effecting alcohol-elimination reaction among
- (A) a both end hydroxyl-blocked organopolysiloxane of the following general formula (5):
- wherein R1 is a substituted or unsubstituted monovalent hydrocarbon group of 1 to 20 carbon atoms, and p is a positive number of from 2 to 200,
- (B) a fluorinated triorganoxysilane of the following general formula (6):
- wherein R2 is a monovalent hydrocarbon group containing at least three fluorine atoms, R3 is an organoxy group represented by —OR1 wherein R1 is as defined above, in an amount that will provide said fluorinated polysiloxane with a fluorine content of at least 5% by weight, and
- (C) an aminoalkyl group-containing organoxysilane of the following general formula (7):
- R1bR33−bR0Si (7)
- wherein R1 and R3 are as defined above, R0 is an aminoalkyl group, and b is equal to 0 or 1.
A method for preparing a fluorinated polysiloxane comprising the step of effecting alcohol-elimination reaction among
- (A) a both end hydroxyl-blocked organopolysiloxane of the following general formula (5):
- wherein R1 is a substituted or unsubstituted monovalent hydrocarbon group of 1 to 20 carbon atoms, and p is a positive number of from 2 to 200,
- (B) a fluorinated triorganoxysilane of the following general formula (6):
- wherein R2 is a group represented by the following general formula (3):
- —CH2CH2CnF2n+1 (3)
- wherein n is a positive number of at least 3, and R3 is an organoxy group represented by —OR1 wherein R1 is as defined above, and
- (C) an aminoalkyl group-containing organoxysilane of the following general formula (7):
- R1bR33−bR0Si (7)
- wherein R1 and R3 are as defined above, R0 is an aminoalkyl group, and b is equal to 0 or 1.
Dependencies are inferred from the claim text.