Epoxy-Functional Polysiloxanes, Silicone Composition, and Coated
OwnerManeesh Bahadur, Shedric O'Neal Glover +1inventors
InventorsManeesh Bahadur, Shedric O'Neal Glover, Ann Walstrom Norris
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Abstract
Epoxy-functional polysiloxanes containing epoxy groups and hydrocarbyl groups free of aliphatic unsaturation, a silicone composition containing a polysiloxane selected from the aforementioned epoxy-functional polysiloxanes, a cured polysiloxane prepared by exposing the silicone composition to ultraviolet radiation, a coated optical fiber containing a cured polysiloxane, and a method of preparing a coated optical fiber.
Claims7
An epoxy-functional polysiloxane having the formula:
- R7R12SiO(R12SiO)m(R1R4SiO)n(R1R6SiO)pSiR12R7
- wherein R1 is C1 to C3 alkyl or phenyl;
- R4 is —CH2—CHR2R3, wherein R2 is C2 to C10 hydrocarbyl free of aliphatic unsaturation and R3 is R1 or H;
- R6 is —CH2—CHR3R5, wherein R5 is an epoxy group;
- R7 is R1, R4, or R6;
- m is from 0.1 to 0.9;
- n is from 0.1 to 0.5;
- p is from 0.1 to 0.6;
- and m+n+p=1.
An epoxy-functional polysiloxane having the formula:
- (R7R12SiO1/2)v(R12SiO2/2)w(R4SiO3/2)x(R6SiO3/2)y(SiO4/2)z
- wherein R1 is C1 to C3 alkyl or phenyl;
- R4 is —CH2—CHR2R3, wherein R2 is C2 to C10 hydrocarbyl free of aliphatic unsaturation and R3 is R1 or H;
- R6 is —CH2—CHR3R5, wherein R5 is an epoxy group;
- R7 is R1, R4, or R6;
- v is from 0 to 0.5;
- w is from 0.1 to 0.9;
- x is from 0.1 to 0.7;
- y is from 0.1 to 0.5;
- z is from 0 to 0.5;
- and v+w+x+y+z=1.
A silicone composition, comprising:
- (A) a polysiloxane selected from (i) at least one epoxy-functional polysiloxane having the formula R7R12SiO(R12SiO)m(R1R4SiO)n(R1R6SiO)pSiR12R7 (I), (ii) at least one epoxy-functional polysiloxane having the formula (R7R12SiO1/2)v(R12SiO2/2)w(R4SiO3/2)x(R6SiO3/2)y(SiO4/2)z (II), and (iii) a mixture comprising (i) and (ii), wherein R1 is C1 to C3 alkyl or phenyl, R4 is —CH2—CHR2R3, wherein R2 is C2 to C10 hydrocarbyl free of aliphatic unsaturation and R3 is R1 or H, R6 is —CH2—CHR3R5, wherein R5 is an epoxy group, R7 is R1, R4, or R6, m is from 0.1 to 0.9, n is from 0.1 to 0.5, p is from 0.1 to 0.6, m+n+p=1, v is from 0 to 0.5, w is from 0.1 to 0.9, x is from 0.1 to 0.7, y is from 0.1 to 0.5, z is from 0 to 0.5, and v+w+x+y+z=1;
- and
- (B) a cationic photoinitiator.
A coated optical fiber comprising:
- an optical fiber comprising a glass fiber core and a cladding surrounding the core, wherein the cladding has a refractive index less than the refractive index of the core;
- and
- a silicone coating surrounding the optical fiber, wherein the coating comprises a cured polysiloxane prepared by applying the silicone composition of the present invention on the optical fiber to form a film and exposing the film to ultraviolet radiation.
A method of preparing a coated optical fiber, the method comprising the steps of:
- applying the silicone composition of the instant invention on an optical fiber to form a film, wherein the optical fiber comprises a glass fiber core and a cladding surrounding the core and the cladding has a refractive index less than the refractive index of the core;
- and
- exposing the film to ultraviolet radiation to form a silicone coating.
Dependencies are inferred from the claim text.