Patent US4038338A successfully refreshed from Google Patents.
US4038338A
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New polyepoxide-polysiloxane compounds
Assignee: Novartis Corp
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Filing: 1975-03-06
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Granted: 1977-07-26
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Expires: 1995-03-06
Abstract
Abstract New polyepoxide-polysiloxanes, which are obtained by mixing in appropriately stoichiometric amounts, an adduct manufactured from a polyepoxide and an acid polyester or a polycarboxylic acid with a polysiloxane and esterifying the mixture, are described. The new compounds can be cured with conventional epoxide resin curing agents, especially cycloaliphatic polycarboxylic acid anhydrides, to give flexible to rubbery-elastic mouldings, which show very low water absorption coupled with excellent dielectric properties and high tracking resistance and arcing resistance.
Inventors
- 👤 Dieter Baumann
- 👤 Heinz Rembold
- 👤 Rolf Schmid
- 👤 Friedrich Lohse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:33
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/48; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/30; C08G59/306; C08L; C08L67/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
96 words
Polyepoxide-polysiloxanes characterised in that they contain units of the formula I ##STR24## in which Z denotes a n-valent radical of a polycarboxylic acid or of an acid polyester, Q denotes an aliphatic, cycloaliphatic, heterocyclic or aromatic epoxide-containing group in which the two oxygen atoms bonded to Q in the formula I are in adjacent positions to one another, R 1 and R 2 independently of one another denote an alkyl, alkenyl, aralkyl, aryl, cycloalkyl, alkoxy or aryloxy group or an epoxide-containing polysiloxane chain, m denotes a number greater than 1 and n denotes 2 or 3.
Claim 2
Dependent Claim
96 words
Polyepoxide-polysiloxanes characterised in that they contain units of the formula I ##STR24## in which Z denotes a n-valent radical of a polycarboxylic acid or of an acid polyester, Q denotes an aliphatic, cycloaliphatic, heterocyclic or aromatic epoxide-containing group in which the two oxygen atoms bonded to Q in the formula I are in adjacent positions to one another, R 1 and R 2 independently of one another denote an alkyl, alkenyl, aralkyl, aryl, cycloalkyl, alkoxy or aryloxy group or an epoxide-containing polysiloxane chain, m denotes a number greater than 1 and n denotes 2 or 3.
Claim 3
Dependent Claim
29 words
Polyepoxide-polysiloxane compounds according to Claim 1, characterised in that n in the formula I denotes 2 and that the polyepoxide-polysiloxane compounds possess recurring units of the formula II ##STR25##
Claim 4
Dependent Claim
26 words
Polyepoxide-polysiloxane compounds according to claim 2, characterised in that Z denotes the radical of a polyester from an aliphatic or cycloaliphatic dicarboxylic acid and a diol.
Claim 5
Dependent Claim
38 words
Polyepoxide-polysiloxane compounds according to claim 3, characterised in that Z represents the radical of an aliphatic polyester with at least 8 carbon atoms in the recurring structural unit, and having a melting point of 50° to 140° C.
Claim 6
Dependent Claim
38 words
Polyepoxide-polysiloxane compounds according to claim 4, characterised in that Z denotes the radical of a polyester from x mols of a dicarboxylic acid and (x-1) mols of a diol, with x representing a number from 2 to 50.
Claim 7
Dependent Claim
55 words
Polyepoxide-polysiloxane compounds according to one of claims 1, characterised in the R 1 and R 2 in the formula I independently of one another denote an alkyl or alkoxy group with 1 to 4 carbon atoms, an aralkyl group with 7 to 10 carbon atoms, a phenyl group, a phenoxy group or a cyclohexyl group.
Claim 8
Dependent Claim
27 words
Polyepoxide-polysiloxane compounds according to one of claims 1, characterised in that m in the formula I represents a number from 2 to 30, preferably 6 to 15.
Claim 9
Dependent Claim
24 words
Polyepoxide-polysiloxane compounds according to one of claims 1, characterised in that Q in the formula I represents a cycloaliphatic group possessing an epoxide group.
Claim 10
Dependent Claim
14 words
Polyepoxide-polysiloxane compounds according to claim 8, characterised in that Q represents the 3-(3',4'-epoxycyclohexyl)-2,4-dioxaspiro(5.5)undecylene-(8,9) radical.
Claim 11
Dependent Claim
37 words
Curable mixtures which are suitable for the manufacture of mouldings or coatings, characterised in that they contain a) polyepoxide-polysiloxanes according to claims 1 and b) curing agents for epoxide resins, such as polyamines or polycarboxylic acid anhydrides.
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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) | 1980-07-25 | 1981-01-24 | 1981-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-25 | 1985-01-24 | 1985-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-25 | 1989-01-24 | 1989-07-26 | $7700.00 | Window Closed / Lapsed |