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US 2023/0068883 A1Published application
A moisture-curable silicone elastomer composition
AssigneeWacker Chemie AG
InventorsJian NIE, Yanxing LIU
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Abstract
A virtually non-contaminating, non-corrosive moisture-curable silicone elastomer composition contains a hydroxyl-terminated polyorganosiloxane, a silane B as defined herein, an alkoxysilane crosslinker, an inorganic filler and a catalyst, a cures to form a low-modulus elastomer.
Claims14
-12. (canceled)
A curable composition, comprising:
- (a) a hydroxyl-terminated polyorganosiloxane,
- (b) a silane B,
- (c) an alkoxysilane crosslinker,
- (d) an inorganic filler, and
- (e) a catalyst,
- wherein silane B has the following formulae (I) or (II):
- where R1 each is the same or different, and is a C1-C12 linear or branched hydrocarbon group or a C1-C12 hydrocarbon group containing an olefinic bond,
- R3 each is the same or different, and is a C1-C12 linear or branched hydrocarbon, C1-C12 linear or branched divalent hydrocarbon group;
- n is 0, 1, or 2;
- R2 each is the same or different, and is a C1-C12 linear or branched hydrocarbon group, or H, and
- X is of one of the formulae [—(R2SiO)m—], C1-C12 divalent hydrocarbon group or a group of the formula [—(C2H4O)p(C3H6O)q—], where R each is the same or different and is an C1-C12 alkyl group, and m, p and q are 0 or positive integers less than or equal to 10, wherein p and q are not equal to 0 at the same time;
- silane B is present in an amount of less than or equal to 0.5 wt %, based on the total weight of the composition;
- and
- Ingredient (d), an inorganic filler, is present in an amount of greater than or equal to 35 wt %, based on the total weight, as 100 wt %, of the composition.
11 more elements
Dependencies are inferred from the claim text.