Silicone laminated substrate, method of producing same, silicone resin composition for producing silicone laminated substrate, and LED device

摘要

Silicone-laminated substrate, including glass cloth, and cured product of silicone resin composition—with which the glass cloth is filled and a surface of the glass cloth is coated. The silicone resin composition includes: (A) an organopolysiloxane having a resin structure of specific siloxane units, (B) an organohydrogenpolysiloxane having a resin structure of specific siloxane units, (C) a platinum group metal-based catalyst, and (D) a filler. The silicone-laminated substrate exhibits excellent mechanical properties, flexibility and workability, has minimal surface tack, and is easy to handle. The silicone-laminated substrate is produced by impregnating a glass cloth with the silicone resin composition dissolved or dispersed in a solvent, subsequently evaporating the solvent from the glass cloth, and subjecting the composition impregnated into the glass cloth to heat-curing under compression-molding conditions. Also, an LED device which includes the silicone-laminated substrate and an LED chip mounted on top of the substrate.

主权项

1. A silicone laminated substrate, comprising:
a glass cloth, and a cured product of a silicone resin composition with which the glass cloth is filled and a surface of the glass cloth is coated, wherein the silicone resin composition is a solid or semisolid at room temperature and comprises: (A) an organopolysiloxane having a resin structure, consisting of R1SiO1.5 units, R22SiO units and R3aR4bSiO(4-a-b)/2 units, wherein, R1, R2 and R3 each independently represents a hydroxyl group, methyl group, ethyl group, propyl group, cyclohexyl group or phenyl group, each R4 independently represents a vinyl group or allyl group, a represents 0, 1 or 2, and b represents 1 or 2, provided that a+b is 2 or 3, and including a structure in which at least a portion of the R22SiO units are connected in a continuous repeating sequence, and a number of units in the repeating sequence is within a range from 5 to 50, (B) an organohydrogenpolysiloxane having a resin structure, consisting of R1SiO1.5 units, R22SiO units and R3cHdSiO(4-c-d)/2 units, wherein, R1, R2 and R3 are each independently as defined above, c represents 0, 1 or 2, and d represents 1 or 2, provided that c+d is 2 or 3, and including a structure in which at least a portion of the R22SiO units are connected in a continuous repeating sequence, and a number of units in the repeating sequence is within a range from 5 to 50: in sufficient amount that a molar ratio of hydrogen atoms bonded to silicon atoms within component (B) relative to a combined total of vinyl groups and allyl groups within component (A) is within a range from 0.1 to 4.0, (C) a platinum group metal-based catalyst: in an effective amount, and (D) a filler in an amount of not more than 900 parts by mass per 100 parts by mass of a combined total of components (A) and (B), wherein said filler component (D) comprises
(D1) a silica in an amount of from 10 to 600 parts by mass per 100 parts by mass of a combined total of components (A) and (B) and(D2) a white pigment selected from titanium dioxide and alumina in an amount within a range from 1 to 300 parts by mass per 100 parts by mass of a combined total of components (A) and (B), wherein light reflectance of the silicone-laminated substrate is not less than 80% across an entire visible light range.