Patent ID: 9353265
Filing Date: 2016-05-31
CPC Classification: C08K,C08L

Claim Text:
1. An image display sealant dam composition that comprises: (A) a polyorganosiloxane having a mercaptoalkyl group bonded to a silicon atom, the polyorganosiloxane (A) having a viscosity at 23° C. of 20 to 25000 cP; (B) an aliphatic unsaturated group-containing polyorganosiloxane including an aliphatic unsaturated group-containing linear polyorganosiloxane (B1) represented by the following formula (I): wherein in the formula (I): each R1 group independently represents an aliphatic unsaturated group, each R group independently represents a C1 to C6 alkyl group or a C6 to C12 aryl group, and 1 to 60 mol % of the total R groups are C6 to C12 aryl groups, and the letter n is a value such that the viscosity at 23° C. is 100 to 1,000,000 cP, and optionally further including a branched polyorganosiloxane (B2) having SiO (C) a photoreaction initiator; (D) at least one aliphatic unsaturated group-containing silane compound; and (E) a hexamethyldisilazine-treated fumed silica having a BET specific surface area of 300 to 500 m wherein a ratio of the number of the mercaptoalkyl groups present in (A) to the total number of the aliphatic unsaturated groups in (B) and (D) is 0.45 to 1.50; (E) is in an amount of 0.5 to 24 parts by weight per 100 parts by weight of (B); and said dam composition has a viscosity at 23° C. of 20,000 to 2,000,000 cP.