Compositions which can be crosslinked by radiation to form elastomers
First Claim
1. A composition which can be crosslinked by radiation to form elastomers comprising (a) an organopolysiloxane containing triorganosiloxane units of the formula
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, R1 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 m2 /g and (d) at least one organopolysiloxane resin comprising units selected from the group consisting of(i) R32 SiO1/2 and R2 SiO3/2,(ii) R32 SiO1/2, R2 SiO3/2 and SiO4/2 and(iii) R32 SiO1/2 and SiO4/2where R2 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.
CHCXOR.sup.1 SiR.sub.2 O.sub.1/2
1 Assignment
0 Petitions
Accused Products
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, R1 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 m2 /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 R2 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, R1 and X are the same as above, are excluded in organopolysiloxane (a) if the organopolysiloxane resin (d) is omitted from the compositions.
18 Citations
28 Claims
- 1. A composition which can be crosslinked by radiation to form elastomers comprising (a) an organopolysiloxane containing triorganosiloxane units of the formula
- space="preserve" listing-type="equation">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, R1 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 m2 /g and (d) at least one organopolysiloxane resin comprising units selected from the group consisting of (i) R32 SiO1/2 and R2 SiO3/2, (ii) R32 SiO1/2, R2 SiO3/2 and SiO4/2 and (iii) R32 SiO1/2 and SiO4/2 where R2 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
- 4. The composition of claim 1, wherein X is oxygen.
- 5. The composition of claim 1, wherein the organopolysiloxane resin (d) comprises units of the formulas
- space="preserve" listing-type="equation">R.sub.3.sup.2 SiO.sub.1/2 and SiO.sub.4/2
in which R2 is selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and hydrogen. - space="preserve" listing-type="equation">H.sub.2 C═
- space="preserve" listing-type="equation">R.sub.3.sup.2 SiO.sub.1/2 and R.sup.2 SiO.sub.3/2
- space="preserve" listing-type="equation">R.sub.3.sup.2 SiO.sub.1/2, R.sup.2 SiO.sub.3/2 and SiO.sub.4/2
- space="preserve" listing-type="equation">HR.sub.2 SiO.sub.1/2 and SiO.sub.4/2
- space="preserve" listing-type="equation">SiO.sub.4/2
space="preserve" listing-type="equation">R.sub.3.sup.2 SiO.sub.1/2
1 to 3;
1, in which R2 is selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and hydrogen.
- space="preserve" listing-type="equation">R.sup.2 SiO.sub.3/2
space="preserve" listing-type="equation">R.sub.3.sup.2 SiO.sub.1/2
1 to 3;
1, in which R2 is selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and hydrogen.
- space="preserve" listing-type="equation">R.sup.2 SiO.sub.3/2 and SiO.sub.4/2
space="preserve" listing-type="equation">R.sub.3.sup.2 SiO.sub.1/2
1 to 3;
1, in which R2 is selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and hydrogen.
- space="preserve" listing-type="equation">SiO.sub.4/2
space="preserve" listing-type="equation">R.sub.3.sup.2 SiO.sub.1/2
1 to 1;
1, in which R2 is selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and hydrogen.
- space="preserve" listing-type="equation">R.sup.2 SiO.sub.3/2
space="preserve" listing-type="equation">R.sub.3.sup.2 SiO.sub.1/2
1 to 1;
1, in which R2 is selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and hydrogen.
- space="preserve" listing-type="equation">R.sup.2 SiO.sub.3/2 and SiO.sub.4/2
space="preserve" listing-type="equation">R.sub.3.sup.2 SiO.sub.1/2
1 to 1;
1, in which R2 is selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and hydrogen.
- 15. A composition which can be crosslinked by radiation to form elastomers comprising (a) an organopolysiloxane containing triorganosiloxane units of the formula
- space="preserve" listing-type="equation">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, R1 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 m2 /g and (d) at least one organopolysioxane resin comprising units selected from the group consisting of (i) R32 SiO1/2 and R2 SiO3/2, (ii) R32 SiO1/2, R2 SiO3/2 and SiO4/2 and (iii) R32 SiO1/2 and SiO4/2 where R2 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. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
- 18. The composition of claim 17, wherein X is oxygen.
- 19. The composition of claim 15, wherein the organopolysiloxane resin (d) comprises units of the formulas
- space="preserve" listing-type="equation">R.sub.3.sup.2 SiO.sub.1/2 and SiO.sub.4/2
in which R2 is selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and hydrogen. - space="preserve" listing-type="equation">H.sub.2 C═
- space="preserve" listing-type="equation">R.sub.3.sup.2 SiO.sub.1/2 and R.sup.2 SiO.sub.3/2
- space="preserve" listing-type="equation">R.sub.3.sup.2 SiO.sub.1/2, R.sup.2 SiO.sub.3/2 and SiO.sub.4/2
- space="preserve" listing-type="equation">HR.sub.2 SiO.sub.1/2 and SiO.sub.4/2
- space="preserve" listing-type="equation">SiO.sub.4/2
space="preserve" listing-type="equation">R.sub.3.sup.2 SiO.sub.1/2
1 to 3;
1, in which R2 is selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and hydrogen.
- space="preserve" listing-type="equation">R.sup.2 SiO.sub.3/2
space="preserve" listing-type="equation">R.sub.3.sup.2 SiO.sub.1/2
1 to 3;
1, in which R2 is selected from the group consisting of monovalent hydrocarbon radicals, hydrogenated monovalent hydrocarbon radicals and hydrogen.
- space="preserve" listing-type="equation">R.sup.2 SiO.sub.3/2 and SiO.sub.4/2
space="preserve" listing-type="equation">R.sub.3.sup.2 SiO.sub.1/2
1 to 3;
1, in which R2 is selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and hydrogen.
- space="preserve" listing-type="equation">SiO.sub.4/2
space="preserve" listing-type="equation">R.sub.3.sup.2 SiO.sub.1/2
1 to 1;
1, in which R2 is selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and hydrogen.
- space="preserve" listing-type="equation">R.sup.2 SiO.sub.3/2
space="preserve" listing-type="equation">R.sub.3.sup.2 SiO.sub.1/2
1 to 1;
1, in the which R2 is selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and hydrogen.
- space="preserve" listing-type="equation">R.sup.2 SiO.sub.3/2 and SiO.sub.4/2
space="preserve" listing-type="equation">R.sub.3.sup.2 SiO.sub.1/2
1 to 1;
1, in which R2 is selected from the group consisting of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and hydrogen.
Specification
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- Resources
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Current AssigneeWacker-Chemie GmbH (Dr. Alexander Wacker Familiengesellschaft Mit Beschrã¤Nkter Haftung)
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Original AssigneeWacker-Chemie GmbH (Dr. Alexander Wacker Familiengesellschaft Mit Beschrã¤Nkter Haftung)
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InventorsBurger, Christa, Bosch, Erhard, Muller, Johann
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Primary Examiner(s)Marquis, Melvyn I.
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Assistant Examiner(s)Dean Jr., Ralph H.
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Application NumberUS07/221,960Time in Patent Office690 DaysField of Search522/99, 524/861, 524/860, 524/862, 528/32, 528/31, 525/478US Class Current522/99CPC Class CodesC08L 83/06 containing silicon bound to...C08L 83/08 containing silicon bound to...
