US4929647A
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Compositions which can be crosslinked by radiation to form elastomers
Assignee: Wacker Chemie AG
•
Filing: 1988-07-08
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Granted: 1990-05-29
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Expires: 2008-07-08
Abstract
Abstract Compositions which can be crosslinked by radiation to form elastomers comprising (a) an organopolysiloxane containing triorganosiloxane units of the formula H.sub.2 C=CHCXOR.sup.1 SiR.sub.2 O.sub.1/2 in which R is selected from monovalent hydrocarbon radicals and halogenated monovalent hydrocarbon radicals, R 1 is selected from divalent hydrocarbon radicals and divalent halogenated hydrocarbon radicals and X is selected from oxygen and sulfur, in which at least 80 percent of the siloxane units other than the triorganosiloxane units are diorganosiloxane units, where the SiC-bonded organic radicals of the triorganosiloxane units and the diorganosiloxane units are selected from monovalent hydrocarbon radicals and halogenated monovalent hydrocarbon radicals, (b) a filler having a surface area of at least 50 m 2 /g, and if necessary (c) a photoinitiator, where the organopolysiloxane (a) contains diorganosiloxane units in which one of the SiC-bonded organic radicals contains an aliphatic carbon-carbon double bond, and/or the compositions contain, in addition to components (a), (b) and if necessary (c), and at least one (d) organopolysiloxane resin containing units of the formulas R.sup.2.sub.3 SiO.sub.1/2 and R.sup.2 SiO.sub.3/2 and/or SiO.sub.4/2 where R 2 is selected from monovalent hydrocarbon radicals, halogenated hydrocarbon radicals and hydrogen, with the proviso that at least an average of 4 Si-bonded hydrogen atoms are present in each molecule of the polysiloxane resins, in which siloxane units of the formula HSR.sup.1 SiRO in an amount of from 0.1 to 5 such siloxane units per radical of the formula H.sub.2 C=CHCXOR.sup.1, where R, R 1 and X are the same as above, are excluded in organopolysiloxane (a) if the organopolysiloxane resin (d) is omitted from the compositions.
Inventors
- 👤 Christa Burger
- 👤 Johann Muller
- 👤 Erhard Bosch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:11
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/04; C08L83/06; C08L83/08
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
271 words
A composition which can be crosslinked by radiation to form elastomers comprising (a) an organopolysiloxane containing triorganosiloxane units of the formula H.sub.2 C═CHCXOR.sup.1 SiR.sub.2 O.sub.1/2 in which R is selected from the group consisting of monovalent hydrocarbon radicals and halogenated monovalent hydrocarbon radicals which are free of aliphatic multiple bonds, R 1 is selected from the group consisting of divalent hydrocarbon radicals and halogenated divalent hydrocarbon radicals which are free of aliphatic multiple bonds and X is selected from the group consisting of oxygen and sulphur, in which at least 80 percent of the siloxane units other than the triorganosiloxane units are diorganosiloxane units, where the SiC-bonded organic radicals of the diorganosiloxane units are selected from the group consisting of monovalent hydrocarbon radicals and halogenated monovalent hydrocarbon radicals, and wherein the organopolysiloxane (a) contains diorganosiloxane units one of those whose SiC-bonded bonded organic radicals contains an aliphatic carbon-carbon double bond, (b) a filler having a surface area of at least 50 m 2 /g and (d) at least one organopolysiloxane resin comprising units selected from the group consisting of (i) R 3 2 SiO 1/2 and R 2 SiO 3/2 , (ii) R 3 2 SiO 1/2 , R 2 SiO 3/2 and SiO 4/2 and (iii) R 3 2 SiO 1/2 and SiO 4/2 where R 2 is independently selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and hydrogen, with the proviso that only one hydrogen atom is bonded to one and the same silicon atom, and an average of at least 4 Si-bonded hydrogen atoms are present in each molecule of the organopolysiloxane resin.
Claim 2
Dependent Claim
271 words
A composition which can be crosslinked by radiation to form elastomers comprising (a) an organopolysiloxane containing triorganosiloxane units of the formula H.sub.2 C═CHCXOR.sup.1 SiR.sub.2 O.sub.1/2 in which R is selected from the group consisting of monovalent hydrocarbon radicals and halogenated monovalent hydrocarbon radicals which are free of aliphatic multiple bonds, R 1 is selected from the group consisting of divalent hydrocarbon radicals and halogenated divalent hydrocarbon radicals which are free of aliphatic multiple bonds and X is selected from the group consisting of oxygen and sulphur, in which at least 80 percent of the siloxane units other than the triorganosiloxane units are diorganosiloxane units, where the SiC-bonded organic radicals of the diorganosiloxane units are selected from the group consisting of monovalent hydrocarbon radicals and halogenated monovalent hydrocarbon radicals, and wherein the organopolysiloxane (a) contains diorganosiloxane units one of those whose SiC-bonded bonded organic radicals contains an aliphatic carbon-carbon double bond, (b) a filler having a surface area of at least 50 m 2 /g and (d) at least one organopolysiloxane resin comprising units selected from the group consisting of (i) R 3 2 SiO 1/2 and R 2 SiO 3/2 , (ii) R 3 2 SiO 1/2 , R 2 SiO 3/2 and SiO 4/2 and (iii) R 3 2 SiO 1/2 and SiO 4/2 where R 2 is independently selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and hydrogen, with the proviso that only one hydrogen atom is bonded to one and the same silicon atom, and an average of at least 4 Si-bonded hydrogen atoms are present in each molecule of the organopolysiloxane resin.
Claim 3
Dependent Claim
12 words
The composition of claim 1, wherein the composition contains (c) a photoinitiator.
Claim 4
Dependent Claim
115 words
The composition of claim 1, wherein the organopolysiloxane (a) is represented by the formula H.sub.2 C═CHCXOR.sup.1 SiR.sub.2 O(SiR.sub.2 O).sub.m (SiRR.sup.3 O).sub.n SiR.sub.2 R.sup.1 OXCHC═CH.sub.2 in which R is selected from the group consisting of monovalent hydrocarbon radicals and halogenated monovalent hydrocarbon radicals which are free of aliphatic multiple bonds, R 1 is selected from the group consisting of divalent hydrocarbon radicals and halogenated divalent hydrocarbon radicals and X is selected from the group consisting of oxygen and sulfur, R 3 is a monovalent SiC-bonded organic radical containing an aliphatic carbon-carbon double bond, m is an integer having a value of at least 10, and n is an integer having a value of 1 to 10.
Claim 5
Dependent Claim
9 words
The composition of claim 1, wherein X is oxygen.
Claim 6
Dependent Claim
39 words
The composition of claim 1, wherein the organopolysiloxane resin (d) comprises units of the formulas R.sub.3.sup.2 SiO.sub.1/2 and SiO.sub.4/2 in which R 2 is selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and hydrogen.
Claim 7
Dependent Claim
40 words
The composition of claim 1, wherein the organopolysiloxane resin (d) comprises units of the formulas R.sub.3.sup.2 SiO.sub.1/2 and R.sup.2 SiO.sub.3/2 in which R 2 is selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and hydrogen.
Claim 8
Dependent Claim
41 words
The composition of claim 1, wherein the organopolysiloxane resin (d) comprises units of the formulas R.sub.3.sup.2 SiO.sub.1/2, R.sup.2 SiO.sub.3/2 and SiO.sub.4/2 in which R 2 is selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and hydrogen.
Claim 9
Dependent Claim
36 words
The composition of claim 1, wherein the organopolysiloxane resin (d) comprises units of the formulas HR.sub.2 SiO.sub.1/2 and SiO.sub.4/2 where R is selected from the group consisting of monovalent hydrocarbon radicals and halogenated monovalent hydrocarbon radicals.
Claim 10
Dependent Claim
56 words
The composition of claim 1, wherein the ratio between the number of units of the formula SiO.sub.4/2 and the number of units of the formula R.sub.3.sup.2 SiO.sub.1/2 in the organopolysiloxane resin (d) is 0.1:1 to 3:1, in which R 2 is selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and hydrogen.
Claim 11
Dependent Claim
57 words
The composition of claim 1, wherein the ratio between the number of units of the formula R.sup.2 SiO.sub.3/2 and the number of units of the formula R.sub.3.sup.2 SiO.sub.1/2 in the organopolysiloxane resin (d) is 0.1:1 to 3:1, in which R 2 is selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and hydrogen.
Claim 12
Dependent Claim
59 words
The composition of claim 1, wherein the ratio between the number of units of the formulas R.sup.2 SiO.sub.3/2 and SiO.sub.4/2 and the number of units of the formula R.sub.3.sup.2 SiO.sub.1/2 in the organopolysiloxane resin (d) is 0.1:1 to 3:1, in which R 2 is selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and hydrogen.
Claim 13
Dependent Claim
56 words
The composition of claim 1, wherein the ratio between the number of units of the formula SiO.sub.4/2 and the number of units of the formula R.sub.3.sup.2 SiO.sub.1/2 in the organopolysiloxane resin (d) is 0.3:1 to 1:1, in which R 2 is selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and hydrogen.
Claim 14
Dependent Claim
57 words
The composition of claim 1, wherein the ratio between the number of units of the formula R.sup.2 SiO.sub.3/2 and the number of units of the formula R.sub.3.sup.2 SiO.sub.1/2 in the organopolysiloxane resin (d) is 0.3:1 to 1:1, in which R 2 is selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and hydrogen.
Claim 15
Dependent Claim
59 words
The composition of claim 1, wherein the ratio between the number of units of the formulas R.sup.2 SiO.sub.3/2 and SiO.sub.4/2 and the number of units of the formula R.sub.3.sup.2 SiO.sub.1/2 in the organopolysiloxane resin (d) is 0.3:1 to 1:1, in which R 2 is selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and hydrogen.
Claim 16
Dependent Claim
248 words
A composition which can be crosslinked by radiation to form elastomers comprising (a) an organopolysiloxane containing triorganosiloxane units of the formula H.sub.2 C═CHCXOR.sup.1 SiRO.sub.1/2 in which R is selected from the group consisting of monovalent hydrocarbon radicals and halogenated monovalent hydrocarbon radicals which are free of aliphatic multiple bonds, R 1 is selected from the group consisting of divalent hydrocarbon radicals and halogenated divalent hydrocarbon radicals which are free of aliphatic multiple bonds and X is selected from the group consisting of oxygen and sulphur, in which at least 80 percent of the siloxane units other than the triorganosiloxane units are diorganosiloxane units, where the SiC-bonded organic radicals of the diorganosiloxane units are selected from the group consisting of monovalent hydrocarbon radicals and halogenated monovalent hydrocarbon radicals, (b) a filler having a surface area of at least 50 m 2 /g and (d) at least one organopolysioxane resin comprising units selected from the group consisting of (i) R 3 2 SiO 1/2 and R 2 SiO 3/2 , (ii) R 3 2 SiO 1/2 , R 2 SiO 3/2 and SiO 4/2 and (iii) R 3 2 SiO 1/2 and SiO 4/2 where R 2 is independently selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and hydrogen, with the proviso that only one hydrogen atom is bonded to one and the same silicon atom, and an average of at least 4 Si-bonded hydrogen atoms are present in each molecule of the organopolysiloxane resin.
Claim 17
Dependent Claim
248 words
A composition which can be crosslinked by radiation to form elastomers comprising (a) an organopolysiloxane containing triorganosiloxane units of the formula H.sub.2 C═CHCXOR.sup.1 SiRO.sub.1/2 in which R is selected from the group consisting of monovalent hydrocarbon radicals and halogenated monovalent hydrocarbon radicals which are free of aliphatic multiple bonds, R 1 is selected from the group consisting of divalent hydrocarbon radicals and halogenated divalent hydrocarbon radicals which are free of aliphatic multiple bonds and X is selected from the group consisting of oxygen and sulphur, in which at least 80 percent of the siloxane units other than the triorganosiloxane units are diorganosiloxane units, where the SiC-bonded organic radicals of the diorganosiloxane units are selected from the group consisting of monovalent hydrocarbon radicals and halogenated monovalent hydrocarbon radicals, (b) a filler having a surface area of at least 50 m 2 /g and (d) at least one organopolysioxane resin comprising units selected from the group consisting of (i) R 3 2 SiO 1/2 and R 2 SiO 3/2 , (ii) R 3 2 SiO 1/2 , R 2 SiO 3/2 and SiO 4/2 and (iii) R 3 2 SiO 1/2 and SiO 4/2 where R 2 is independently selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and hydrogen, with the proviso that only one hydrogen atom is bonded to one and the same silicon atom, and an average of at least 4 Si-bonded hydrogen atoms are present in each molecule of the organopolysiloxane resin.
Claim 18
Dependent Claim
12 words
The composition of claim 15, wherein the composition contains (c) a photoinitiator.
Claim 19
Dependent Claim
89 words
The composition of claim 15, wherein the organopolysiloxane (a) is a composition of the formula H.sub.2 C═CHCXOR.sup.1 SiR.sub.2 O(SiR.sub.2 O).sub.m SiR.sub.2 R.sup.1 OXCHC═CH.sub.2 in which R is selected from the group consisting of monovalent hydrocarbon radicals and halogenated monovalent hydrocarbon radicals which are free of aliphatic multiple bonds, R 1 is selected from the group consisting of divalent hydrocarbon radicals and halogenated divalent hydrocarbon radicals and X is selected from the group consisting of oxygen and sulfur, and m is an integer having a value of at least 10.
Claim 20
Dependent Claim
9 words
The composition of claim 17, wherein X is oxygen.
Claim 21
Dependent Claim
39 words
The composition of claim 15, wherein the organopolysiloxane resin (d) comprises units of the formulas R.sub.3.sup.2 SiO.sub.1/2 and SiO.sub.4/2 in which R 2 is selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and hydrogen.
Claim 22
Dependent Claim
40 words
The composition of claim 15, wherein the organopolysiloxane resin (d) comprises units of the formulas R.sub.3.sup.2 SiO.sub.1/2 and R.sup.2 SiO.sub.3/2 in which R 2 is selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and hydrogen.
Claim 23
Dependent Claim
41 words
The composition of claim 15, wherein the organopolysiloxane resin (d) comprises units of the formulas R.sub.3.sup.2 SiO.sub.1/2, R.sup.2 SiO.sub.3/2 and SiO.sub.4/2 in which R 2 is selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and hydrogen.
Claim 24
Dependent Claim
36 words
The composition of claim 15, wherein said organopolysiloxane resin (d) comprises units of the formulas HR.sub.2 SiO.sub.1/2 and SiO.sub.4/2 where R is selected from the group consisting of monovalent hydrocarbon radicals and halogenated monovalent hydrocarbon radicals.
Claim 25
Dependent Claim
56 words
The composition of claim 15, wherein the ratio between the number of units of the formula SiO.sub.4/2 and the number of units of the formula R.sub.3.sup.2 SiO.sub.1/2 in the organopolysiloxane resin (d) is 0.1:1 to 3:1, in which R 2 is selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and hydrogen.
Claim 26
Dependent Claim
57 words
The composition of claim 15, wherein the ratio between the number of units of the formula R.sup.2 SiO.sub.3/2 and the number of units of the formula R.sub.3.sup.2 SiO.sub.1/2 in the organopolysiloxane resin (d) is 0.1:1 to 3:1, in which R 2 is selected from the group consisting of monovalent hydrocarbon radicals, hydrogenated monovalent hydrocarbon radicals and hydrogen.
Claim 27
Dependent Claim
59 words
The composition of claim 15, wherein the ratio between the number of units of the formulas R.sup.2 SiO.sub.3/2 and SiO.sub.4/2 and the number of units of the formula R.sub.3.sup.2 SiO.sub.1/2 in the organopolysiloxane resin (d) is 0.1:1 to 3:1, in which R 2 is selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and hydrogen.
Claim 28
Dependent Claim
56 words
The composition of claim 15, wherein the ratio between the number of units of the formula SiO.sub.4/2 and the number of units of the formula R.sub.3.sup.2 SiO.sub.1/2 in the organopolysiloxane resin (d) is 0.3:1 to 1:1, in which R 2 is selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and hydrogen.
Claim 29
Dependent Claim
58 words
The composition of claim 15, wherein the ratio between the number of units of the formula R.sup.2 SiO.sub.3/2 and the number of units of the formula R.sub.3.sup.2 SiO.sub.1/2 in the organopolysiloxane resin (d) is 0.3:1 to 1:1, in the which R 2 is selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and hydrogen.
Claim 30
Dependent Claim
59 words
The composition of claim 15, wherein the ratio of the number of units of the formulas R.sup.2 SiO.sub.3/2 and SiO.sub.4/2 to the number of units of the formula R.sub.3.sup.2 SiO.sub.1/2 in the organopolysiloxane resin (d) is 0.3:1 to 1:1, in which R 2 is selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and hydrogen.
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