Silanol condensation catalyst, heat-curable silicone resin composition for sealing photosemiconductors and sealed photosemiconductor using same
A silanol condensation catalyst including at least the zirconium metal salt expressed by Formula (I) below (wherein n is an integer from 1 to 3; each R 1 is a hydrocarbon group having from 1 to 16 carbons; and each R 2 is a hydrocarbon group having from 1 to 18 carbons.) A heat-curable silicone resin composition for sealing optical semiconductors includes 100 parts by mass of a polysiloxane containing two or more silanol groups in the molecule; from 0.1 to 2,000 parts by mass of a silane compound containing two or more alkoxy groups that are bonded to a silicon atom in the molecule; and a zirconium metal salt expressed by Formula (I). A sealed optical semiconductor is formed by sealing a LED chip by applying the heat-curable silicone resin composition to the LED chip, heating the LED chip, and curing the heat-curable silicone resin composition.
1. A heat-curable silicone resin composition for sealing optical semiconductors comprising:
(A) 100 parts by mass of a polysiloxane containing two or more silanol groups in the molecule;
(B) from 0.1 to 2,000 parts by mass of a silane compound containing two or more alkoxy groups that are bonded to a silicon atom in the molecule; and
(C) a zirconium metal salt expressed by Formula (I):
(wherein n is an integer from 1 to 3; each R 1 is a hydrocarbon group having from 1 to 16 carbons; and each R 2 is a hydrocarbon group having from 1 to 18 carbons); and
the R 1 of Formula (I) is at least one selected from the group consisting of a cyclopropyl group, a cyclopentyl group, a cyclohexyl group, an adamanthyl group, and a naphthene ring.
2. The heat-curable silicone resin composition for sealing optical semiconductors according to claim 1 , further comprising from 0.001 to 5 parts by mass of a quaternary tin compound containing an alkyl group and an acyl group per a total 100 parts by mass of the polysiloxane and the silane compound.
3. The heat-curable silicone resin composition for sealing optical semiconductors according to claim 2 , wherein a content of the zirconium metal salt is from 0.001 to 5 parts by mass per the total 100 parts by mass of the polysiloxane and the silane compound.
4. The heat-curable silicone resin composition for sealing optical semiconductors according to claim 1 , wherein a content of the zirconium metal salt is from 0.001 to 5 parts by mass per the total 100 parts by mass of the polysiloxane and the silane compound.
5. The heat-curable silicone resin composition for sealing optical semiconductors according to claim 4 , further comprising from 0.001 to 5 parts by mass of a quaternary tin compound containing an alkyl group and an acyl group per a total 100 parts by mass of the polysiloxane and the silane compound.
6. The heat-curable silicone resin composition for sealing optical semiconductors according to claim 1 , comprising a straight chain organopolydimethylsiloxane having a weight-average molecular weight of from 1,000 to 1,000,000, expressed by Formula (1) below, as the polysiloxane:
where m is an integer from 10 to 15,000.
7. The heat-curable silicone resin composition for sealing optical semiconductors according to claim 6 , wherein a content of the zirconium metal salt is from 0.001 to 5 parts by mass per the total 100 parts by mass of the polysiloxane and the silane compound.
8. The heat-curable silicone resin composition for sealing optical semiconductors according to claim 1 , further comprising from 0.1 to 5 parts by mass of bis(alkoxysilyl)alkane per the total 100 parts by mass of the polysiloxane and the silane compound.
9. The heat-curable silicone resin composition for sealing optical semiconductors according to claim 8 , comprising a straight chain organopolydimethylsiloxane having a weight-average molecular weight of from 1,000 to 1,000,000, expressed by Formula (1) below, as the polysiloxane:
wherein m is an integer from 10 to 15,000.
10. A sealed optical semiconductor formed by sealing a LED chip by:
applying a heat-curable silicone resin composition for sealing optical semiconductors described in claim 1 to the LED chip,
heating the LED chip, and
curing the heat-curable silicone resin composition for sealing optical semiconductors.
11. A heat-curable silicone resin composition for sealing optical semiconductors comprising:
(A) 100 parts by mass of a polysiloxane containing two or more silanol group in the molecule;
(B) from 0.1 to 2,000 parts by mass of a silane compound containing two or more alkoxy group that are bonded to a silicon atom in the molecule;
(C) a zirconium metal salt expressed by Formula (I):
(wherein n is an integer from 1 to 3; each R 1 is a hydrocarbon group having from 1 to 16 carbons; and each R 2 is a hydrocarbon group having from 1 to 18 carbons); and
from 0.1 to 5 parts by mass of bis(alkoxysilyl)alkane per the total 100 parts by mass of the polysiloxane and the silane compound.
12. A sealed optical semiconductor formed by sealing a LED chip by:
applying a heat-curable silicone resin composition for sealing optical semiconductors to the LED chip, the heat-curable silicone rein composition for sealing optical semiconductors comprising:
(A) 100 parts by mass of a polysiloxane containing two or more silanol group in the molecule;
(B) from 0.1 to 2,000 parts by mass of a silane compound containing two or more alkoxy group that are bonded to a silicon atom in the molecule; and
(C) a zirconium metal salt expressed by Formula (I):
(wherein n is an integer from 1 to 3; each R 1 is a hydrocarbon group having from 1 to 16 carbons; and each R 2 is a hydrocarbon group having from 1 to 18 carbons),
heating the LED chip, and
curing the heat-curable silicone resin composition for sealing optical semiconductors.