Back to results
US 7,452,937 B2Granted
Highly elongated single component, non-corrosive RTV silicone compositions
AssigneeHenkel Corporation
InventorsRobert P. Cross, Thomas Fay-Oy Lim, Hsien-Kun Chu, Mathias E. Liistro, Jr., Alfred A. DeCato, Debora E. Duch, Bahram Issari
Life of this patent
Estimating the term…
Abstract
A room temperature vulcanizing silicone polymer composition including: a) as part of the silicone polymer, a segment including a silicone polymer of Formula (I): b) a finely-divided inorganic filler present in an amount of at least about 25% by weight of the total composition. Enhanced elongation ability is possessed by these compositions.
Claims10
A room temperature vulcanizing silicone polymer composition, which includes:
- a) as part of the silicone polymer, a segment comprising a silicone polymer of Formula (I):
- wherein
- n is about 20 to about 2,400;
- R in each occurrence may be the same or different and is a C1 to C10 hydrocarbon radical;
- R1 in each occurrence may be the same or different and is a C1 to C10 hydrocarbon radical;
- and
- X is a member selected from the group consisting of O, NR3, S(O)m, and P(O)r, wherein
- m is 0, 1, or 2,
- r is 1 or 2;
- R3 is a member selected from the group consisting of C1 to C4 alkyl, C1 to C4 alkenyl, and C(O)R6,
- wherein R6 is a member selected from the group consisting of C1 to C4 alkyl, C1 to C4 alkenyl, and C1 to C4 alkoxy;
- and
- b) an inorganic filler present in an amount of at least about 15% by weight of the total composition, wherein:
- i. at least about 90% of the inorganic filler has a diameter less than 2 microns;
- ii. at least about 65% of the inorganic filler has diameter less than 1 micron;
- and
- iii. the inorganic filler has an average particle diameter from about 0.2 to about 2.0 microns.
14 more elements
A room temperature vulcanizing silicone polymer composition, comprising:
- a) a silicone polymer that is the reaction product of:
- i. a siloxane having the formula:
- wherein
- n is about 20 to about 2,400;
- and
- R in each occurrence may he the same or different and is a C1 to C10 hydrocarbon radical;
- and
- ii. less than one equivalent of a silane having the formula:
- wherein
- R1 in each occurrence may be the same or different and is a C1 to C10 hydrocarbon radical;
- and
- R2 in each occurrence may be the same or different and is a C1 to C10 hydrocarbon radical containing at least one heteroatom, wherein
- the heteroatom is a member selected from the group consisting of O, N, S, and P;
- and
- the heteroatom is the point of attachment to the methylene group;
- and
- b) an inorganic filler present in an amount of at least about 15% by weight of the total composition, wherein:
- i. at least about 90% of the inorganic filler has a diameter less than 2 microns;
- and
- ii. at least about 65% of the inorganic filler has a diameter less than 1 micron.
17 more elements
A method for making a room temperature vulcanizing silicone polymer composition comprising the steps of:
- a) reacting:
- i. a siloxane having the formula:
- wherein
- n is about 20 to about 2,400;
- and
- R in each occurrence may be the same or different and is a C1 to C10 hydrocarbon radical;
- with
- ii. less than one equivalent of a silane having the formula:
- wherein
- R1 in each occurrence may be the same or different and is a C1 to C10 hydrocarbon radical;
- and
- R2 in each occurrence may be the same or different and is a C1 to C10 hydrocarbon radical containing at least one heteroatom, wherein
- the heteroatom is a member selected from the group consisting of O, N, S, and P;
- and
- the heteroatom is the point of attachment to the methylene group;
- and
- b) mixing the reaction product of step a) with an inorganic filler present in an amount of at least about 25% by weight of the total composition, wherein:
- i. at least about 90% of the inorganic filler has a diameter less than 2 microns;
- and
- ii. at least about 65% of the inorganic filler has a diameter less than 1 micron.
17 more elements
A method for increasing the elongation of a room temperature vulcanizing silicone polymer composition, comprising the steps of:
- a) reacting:
- i. a siloxane having the formula:
- wherein
- n is about 20 to about 2,400;
- and
- R in each occurrence may be the same or different and is a C1 to C10 hydrocarbon radical;
- with
- ii. less than one equivalent of a silane having the formula:
- wherein
- R1 in each occurrence may be the same or different and is a C1 to C10 hydrocarbon radical;
- and
- R2 in each occurrence may the same or different and is a C1 to C10 hydrocarbon radical containing at least one heteroatom, wherein
- the heteroatom is a member selected from the group consisting of O, N, S, and P;
- and
- the heteroatom is the point of attachment to the methylene group;
- and
- b) mixing the reaction product of step a) an inorganic filler present in an amount of at least about 25% by weight of the total composition, wherein:
- i. at least 90% of the inorganic filler has a diameter less than 2 microns;
- and
- ii. at least about 65% of the inorganic filler has a diameter less than 1 micron.
17 more elements
Dependencies are inferred from the claim text.