Condensation products of silicic acid derivatives and optical waveguide devices using the same
View Patent ↗The present invention relates to condensation products of silicic acid derivatives usable especially in optical waveguides and particularly to a condensation product obtained by condensing a silane diol compound (A) of the general formula (1): R 1 2 Si(OR 2 ) 2 (1) wherein R 1 represents a group having at least one aromatic group and having 6 to 20 carbon atoms, and R 2 represents hydrogen (H which may also be a heavy hydrogen D), with a modified silane compound (B) of the general formula (2): R 3 Si(OR 4 ) 3 (2) wherein R 3 represents an organic group having at least one C═C double bond; and R 4 represents a group of C n H 2n+1 (n=a number of 1 or 2), in the molar ratio 1.1 to 1.4:1 [(A):(B)], and to a process for producing the same condensation product, as well as to an optical waveguide device fabricated using the same condensation product.
1. A condensation product obtained by condensing a silane diol compound (A) of the general formula (1):
R 1 2 Si(OR 2 ) 2 (1)
wherein R 1 represents a group having at least one aromatic group and having 6 to 20 carbon atoms, and R 2 represents hydrogen H or heavy hydrogen D, with a modified silane compound (B) of the general formula (2):
R 3 Si(OR 4 ) 3 (2)
wherein R 3 represents an organic group having at least one C═C double bond; and R 4 represents a C n H 2n+1 group wherein n is 1 or 2, wherein the molar ratio of (A):(B) is 1.1 to 1.4:1.
2. The condensation product of claim 1 , wherein R 3 in the general formula (2) represents a CH 2 ═CH—C 6 X 4 —(CH 2 ) n — group in which X is H or F, and n is a number of 0 to 2.
3. The condensation product of claim 1 , wherein R 1 in the general formula (1) represents a C 6 X 5 — group in which X is H or F.
4. A cured product obtained by curing the condensation product of claim 1 , by irradiation with light or heating.
5. An optical waveguide device comprising a core and a clad, wherein the core and the clad are formed of the cured product of claim 4 , respectively.
6. The optical waveguide device of claim 5 , which is provided with at least a means for heating the clad.
7. A condensation product obtained by condensing a silane diol compound (A) of the general formula (1):
R 1 2 Si(OR 2 ) 2 (1)
wherein R 1 represents a group having at least one aromatic group and having 6 to 20 carbon atoms, and R 2 represents hydrogen H or heavy hydrogen D, with a modified silane compound (B) of the general formula (2):
R 3 Si(OR 4 ) 3 (2)
wherein R 3 represents an organic group having at least one C═C double bond; and R 4 represents a C n H 2n+1 group wherein n is 1 or 2, and a modified silane compound (C) of the general formula (3):
R 5 Si(OR 4 ) 3 (3)
wherein R 4 is as defined in the general formula (2); and R 5 represents a CF 3 (CF 2 ) n (CH 2 ) 2 — group in which n is a number of 0 to 9, or a C 6 X 5 — group in which X is H or F,
wherein the molar ratio of (A):((B)+(C)) is 1.1 to 1.4:1.
8. The condensation product of claim 7 , wherein the modified silane compound (B) is condensed in an amount of at least 15 mol % based on the total of the compounds (A), (B) and (C).
9. The condensation product of claim 7 , wherein R 5 in the general formula (3) represents a CF 3 (CF 2 ) n (CH 2 ) 2 — group in which n is a number of 5 to 7.
10. A process for producing a condensation product, which comprises condensing a silane diol compound (A) of the general formula (1):
R 1 2 Si(OR 2 ) 2 (1)
wherein R 1 represents a group having at least one aromatic group and having 6 to 20 carbon atoms, and R 2 represents hydrogen H or heavy hydrogen D, with a modified silane compound (B) of the general formula (2):
R 3 Si(OR 4 ) 3 (2)
wherein R 3 represents an organic group having at least one C═C double bond; and R 4 represents a C n H 2n+1 group wherein n is 1 or 2,
wherein the molar ratio of (A):(B) is 1.1 to 1.4:1.
11. A process for producing a condensation product, which comprises condensing a silane diol compound (A) of the general formula (1):
R 1 2 Si(OR 2 ) 2 (1)
wherein R 1 represents a group having at least one aromatic group and having 6 to 20 carbon atoms, and R 2 represents hydrogen H or heavy hydrogen D, with a modified silane compound (B) of the general formula (2):
R 3 Si(OR 4 ) 3 (2)
wherein R 3 represents an organic group having at least one C═C double bond; and R 4 represents a C n H 2n+1 group wherein n is 1 or 2, and a modified silane compound (C) of the general formula (3):
R 5 Si(OR 4 ) 3 (3)
wherein R 4 is as defined in the general formula (2); and R 5 represents a CF 3 (CF 2 ) n (CH 2 ) 2 — group in which n is a number of 0 to 9, or a C 6 X 5 — group in which X is H or F,
wherein the molar ratio of (A):((B)+(C)) is 1.1 to 1.4:1.