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US4513132A
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Heat-resistant silicone block polymer
Assignee: Hitachi Ltd
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Filing: 1983-03-31
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Granted: 1985-04-23
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Expires: 2003-03-31
Abstract
Abstract Heat-resistant silicone block polymer with a good flexibility obtained by reaction of an organosilsesquioxane with a silicone compound or organosiloxane in the presence of a basic catalyst in an organic solvent.
Inventors
- 👤 Fusaji Shoji
- 👤 Issei Takemoto
- 👤 Fumio Kataoka
- 👤 Hitoshi Yokono
- 👤 Tokio Isogai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:20
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/48; C08G77/50; C08G77/52; C08G77/42; C08G77/44
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
175 words
A heat-resistant silicone block polymer obtained by reaction of 100 parts by weight of organosilsesquioxane having the following formula (5): ##STR17## wherein R 1 is a lower alkyl group having 1 to 5 carbon atoms and/or an aryl group and n is an integer of from 0 to 4,000, with 5 to 400 parts by weight of a silicone compound or organosiloxane represented by the formula (6) or (7): ##STR18## wherein R 2 is an arylene group, R 3 and R 4 are lower alkyl groups having 1 to 5 carbon atoms, alkenyl groups and/or aryl groups, and X is a chlorine atom, a hydroxyl group, an alkoxy group or an N,N-dialkylamino group, or ##STR19## wherein R 2 , R 3 and R 4 and X have the same meanings as defined heretofore and p is an integer of from 0 to 100, in an organic solvent and in the presence of 0.1 to 200 parts by weight of a basic catalyst per 100 parts by weight of the compound of the general formula (5).
Claim 2
Dependent Claim
175 words
A heat-resistant silicone block polymer obtained by reaction of 100 parts by weight of organosilsesquioxane having the following formula (5): ##STR17## wherein R 1 is a lower alkyl group having 1 to 5 carbon atoms and/or an aryl group and n is an integer of from 0 to 4,000, with 5 to 400 parts by weight of a silicone compound or organosiloxane represented by the formula (6) or (7): ##STR18## wherein R 2 is an arylene group, R 3 and R 4 are lower alkyl groups having 1 to 5 carbon atoms, alkenyl groups and/or aryl groups, and X is a chlorine atom, a hydroxyl group, an alkoxy group or an N,N-dialkylamino group, or ##STR19## wherein R 2 , R 3 and R 4 and X have the same meanings as defined heretofore and p is an integer of from 0 to 100, in an organic solvent and in the presence of 0.1 to 200 parts by weight of a basic catalyst per 100 parts by weight of the compound of the general formula (5).
Claim 3
Dependent Claim
88 words
A heat-resistant silicone block polymer according to claim 1, wherein said basic catalyst is selected from the group consisting of pyridine, triethylamine, picoline, quinoline, and N,N-dialkylaniline when X is a chlorine atom, an alkoxy group or an N,N-dialkylamino group in a compound of the formula (6) or (7) and the basic catalyst is selected from the group consisting of pyridine, triethylamine, picoline, quinoline, N,N-dialkylaniline, tetramethylammonium acetate, n-hexylamino-2-ethylhexoate, tetramethylguanidine-di-2-ethylhexoate, piperidine, triethanolamine, and 1,4-diazobicyclo-[2,2,2]-octane when X is a hydroxyl group in the compound of the general formula (6) or (7).
Claim 4
Dependent Claim
73 words
A heat-resistant silicone block polymer according to claim 1, wherein the organosilsesquioxane represented by the formula (5) is a hydroxyl-terminated compound selected from the group consisting of phenylsilsesquioxane, chlorophenylsilsesquioxane, diphenylsilsesquioxane, naphthylsilsesquioxane, tolylsilsesquioxane, cyanophenylsilsesquioxane, benzoylphenylsilsesquioxane, p-phenoxyphenylsilsesquioxane, methylsilsesquioxane, ethylsilsesquioxane, propylsilsesquioxane and tertbutylsilsesquioxane; the compound of the formula (6) is selected from the group consisting of bis(hydroxydimethylsilyl)benzene, bis(hydroxydiphenylsilyl)benzene, bis(hydroxydivinylsilyl)benzene; and the compound of formula (7) is selected from the group consisting of polytetramethyl-p-silphenylenesiloxane, polytetraphenyl-p-silphenylenesiloxane and polytetravinyl-p-silphenylenesiloxane.
Claim 5
Dependent Claim
30 words
A heat-resistant silicone block polymer according to claim 1, wherein said organic solvent is an aromatic hydrocarbon, halogenated alkane and ether, a ketone, a polar solvent or a mixture thereof.
Claim 6
Dependent Claim
35 words
A heat-resistant silicone block polymer according to claim 1, wherein said organic solvent is benzene, toluene, methoxybenzene, veratrole, diphenyl, diphenylether, dichloromethane, chloroform, diethylether, diethylpropyl ether, tetrahydrofuran, acetone, methylisobutyl ketone, N-methyl-2-pyrolidone, N-cyclohexyl-2-pyrolidone or a mixture thereof.
Claim 7
Dependent Claim
25 words
A heat-resistant silicone block polymer according to claim 1, wherein the reaction is effected at 50° C. to 200° C. for 5 to 50 hours.
Claim 8
Dependent Claim
39 words
A heat-resistant silicone block polymer according to claim 1, wherein the arylene group is selected from the group consisting of ##STR20## and a xylylene group, and the aryl group is selected from the group consisting of phenyl and tolyl.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-22 | 1988-10-22 | 1989-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-22 | 1992-10-22 | 1993-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-22 | 1996-10-22 | 1997-04-23 | $7700.00 | Window Closed / Lapsed |