US3962299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organopolysiloxane polyesters
Assignee: Celanese Corp
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Filing: 1974-04-25
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Granted: 1976-06-08
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Expires: 1994-04-25
Abstract
Abstract Novel organopolysiloxane polyesters are provided by the interaction of bis(2-hydroxyethyl) terephthalate and organohalosilanes.
Inventors
- 👤 Robert W. Stackman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:53
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/60; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0838
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
48 words
A polymerization process for producing an organopolysiloxane polyester which comprises condensing bis(2-hydroxyethyl) terephthalate with an organohalosilane having the formula: ##EQU2## wherein X is a halogen atom; and R is selected from halogen and hydrocarbon radicals, halo-substituted hydrocarbons and cyano-substituted hydrocarbons containing between 1 and about 22 carbon atoms.
Claim 2
Dependent Claim
48 words
A polymerization process for producing an organopolysiloxane polyester which comprises condensing bis(2-hydroxyethyl) terephthalate with an organohalosilane having the formula: ##EQU2## wherein X is a halogen atom; and R is selected from halogen and hydrocarbon radicals, halo-substituted hydrocarbons and cyano-substituted hydrocarbons containing between 1 and about 22 carbon atoms.
Claim 3
Dependent Claim
16 words
A process according to claim 1 wherein the reactants are present in about molar equivalent weights.
Claim 4
Dependent Claim
15 words
A polymerization process for producing an organopolysiloxane polyester which comprises condensing bis(2-hydroxyethyl) terephthalate with dimethyldichlorosilane.
Claim 5
Dependent Claim
15 words
A polymerization process for producing an organopolysiloxane polyester which comprises condensing bis(2-hydroxyethyl) terephthalate with dimethyldichlorosilane.
Claim 6
Dependent Claim
15 words
A polymerization process for producing an organopolysiloxane polyester which comprises condensing bis(2-hydroxyethyl) terephthalate with diphenyldichlorosilane.
Claim 7
Dependent Claim
15 words
A polymerization process for producing an organopolysiloxane polyester which comprises condensing bis(2-hydroxyethyl) terephthalate with diphenyldichlorosilane.
Claim 8
Dependent Claim
15 words
A polymerization process for producing an organopolysiloxane polyester which comprises condensing bis(2-hydroxyethyl) terephthalate with divinyldichlorosilane.
Claim 9
Dependent Claim
15 words
A polymerization process for producing an organopolysiloxane polyester which comprises condensing bis(2-hydroxyethyl) terephthalate with divinyldichlorosilane.
Claim 10
Dependent Claim
33 words
A process according to claim 1 wherein there is included as a reactant a crosslinking quantity of a member selected from organotrihalosilane, silicon tetrahalide, and poylols having at least three reactive hydroxyl groups.
Claim 11
Dependent Claim
24 words
A process according to claim 5 wherein as an additional step, the organopolysiloxane polyester is crosslinked in the presence of a vinyl polymerization catalyst.
Claim 12
Dependent Claim
40 words
A organopolysiloxane polyester characterized by the structural formula: ##SPC2## wherein R is selected from hydrocarbon radicals, halo-substituted hydrocarbons and cyano-substituted hydrocarbons, and R contains between 1 and about 10 carbon atoms; n is an integer between 5 and about 1000.
Claim 13
Dependent Claim
40 words
A organopolysiloxane polyester characterized by the structural formula: ##SPC2## wherein R is selected from hydrocarbon radicals, halo-substituted hydrocarbons and cyano-substituted hydrocarbons, and R contains between 1 and about 10 carbon atoms; n is an integer between 5 and about 1000.
Claim 14
Dependent Claim
14 words
An organopolysiloxane polyester in accordance with claim 8 wherein R is a methyl radical.
Claim 15
Dependent Claim
14 words
An organopolysiloxane polyester in accordance with claim 8 wherein R is a phenyl radical.
Claim 16
Dependent Claim
41 words
An organopolysiloxane polyester characterized by the structural formula: ##SPC3## wherein R is selected from halogen and hydrocarbon radicals, halo-substituted hydrocarbons and cyano-substituted hydrocarbons containing between 1 and about 10 carbon atoms; and n is an integer between 5 and about 1000.
Claim 17
Dependent Claim
41 words
An organopolysiloxane polyester characterized by the structural formula: ##SPC3## wherein R is selected from halogen and hydrocarbon radicals, halo-substituted hydrocarbons and cyano-substituted hydrocarbons containing between 1 and about 10 carbon atoms; and n is an integer between 5 and about 1000.
Claim 18
Dependent Claim
14 words
An organopolysiloxane polyester in accordance with claim 8 wherein R is a vinyl radical.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-08 | 1979-12-08 | 1980-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-08 | 1983-12-08 | 1984-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-08 | 1987-12-08 | 1988-06-08 | $7700.00 | Window Closed / Lapsed |