Patent ID: 11884847
Assignee: ELKEM SILICONES USA CORP.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 4:
5. The curable silicone composition X according to claim 1, wherein the at least one diorganoalkenylsiloxy-terminated diorganopolysiloxane gum crosslinker Alk-XL containing at least 3 silicon-bonded C2 to C20 alkenyl groups per molecule comprises:
at least three siloxy units of formula (A-3):

(Alk)(R)hSiO(3-h)/2  (A-3)

wherein the symbol “Alk” represents a C2 to C20 alkenyl group, such as a vinyl, allyl, hexenyl, decenyl, or tetradecenyl group, and the symbol R represents a C1 to C20 alkyl group, such as a methyl, ethyl, propyl, or a C6-C12 aryl group such as a xylyl, tolyl, or phenyl group, in which each instance of “Alk” and R can be the same or different, and
wherein h=1 or 2, and
other siloxy units of formula (A-2):

(L)g SiO(4-g)/2  (A-2)

in which the symbol L represents a C1 to C20 alkyl group, such as a methyl, ethyl, propyl, or a C6-C12 aryl group such as a xylyl, tolyl, or phenyl group, and the symbol g is equal to 2, in which each instance of L can be the same or different.