Patent US2856060A successfully refreshed from Google Patents.
Patent US3904708A successfully refreshed from Google Patents.
US3904708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for graft polymerization
Assignee: Individual
•
Filing: 1968-01-08
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Granted: 1975-09-09
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Expires: 1988-01-08
Abstract
Abstract Aluminum trialkyl and aluminum dialkyl monohalide catalysts can be used to graft cationically polymerizable monomers, such as styrene, chloroprene, isobutylene, etc. to halogenated polymers with some highly reactive halogen atoms such as PVC, neoprene, chlorobutyl, etc.
Inventors
- 👤 Joseph P Kennedy
- 👤 Francis P Baldwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:31
CPC Classifications
C; C08; C08F; C08F255/00; C08F255/08; C08F279/00; C08F279/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
96 words
A PROCESS FOR PREPARING A GRAFT COPOLYMER WHICH COMPRISES REACTING A CATIONICALLY POLYMERIZABLE MONOMER SELECTED FROM HE GROUP CONSISTING OF STYRENE AMETHYL STYRENE PCHLORO STYRENE PROPENE 1-PENTENE 2-ETHYLEHL-1-HEXENE ISOPRENE CHLOROPRENE DIMETHYLDUTADIENE PIPERLENE CYCLOPENTADIENE CYCLOHEXADIENE BETA-PINENE AND METHYLENE NORBORNENE WITH A HALOGENATED POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYCHLOROPRENE HALOGENATED POLYISOPRENE HALOGENATED POLYBUTADIENE HALOGENATED POLYPIPERYLENE AND HALOGENATED BUTYL RUBBER IN THE PRESENCE OF A CATALYST CONSISTING ESSENTIALLY OF A COMPOUND HAVING THE FORMULA AIM2R WHEREIN M IS A C1-C12 ALKYL RADICAL AND R IS SELECTED FROM THE GROUP CONSISTING OF M HYDROGEN AND HALOGEN WHEREIN SAID
Claim 2
Dependent Claim
96 words
A PROCESS FOR PREPARING A GRAFT COPOLYMER WHICH COMPRISES REACTING A CATIONICALLY POLYMERIZABLE MONOMER SELECTED FROM HE GROUP CONSISTING OF STYRENE AMETHYL STYRENE PCHLORO STYRENE PROPENE 1-PENTENE 2-ETHYLEHL-1-HEXENE ISOPRENE CHLOROPRENE DIMETHYLDUTADIENE PIPERLENE CYCLOPENTADIENE CYCLOHEXADIENE BETA-PINENE AND METHYLENE NORBORNENE WITH A HALOGENATED POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYCHLOROPRENE HALOGENATED POLYISOPRENE HALOGENATED POLYBUTADIENE HALOGENATED POLYPIPERYLENE AND HALOGENATED BUTYL RUBBER IN THE PRESENCE OF A CATALYST CONSISTING ESSENTIALLY OF A COMPOUND HAVING THE FORMULA AIM2R WHEREIN M IS A C1-C12 ALKYL RADICAL AND R IS SELECTED FROM THE GROUP CONSISTING OF M HYDROGEN AND HALOGEN WHEREIN SAID
Claim 3
Dependent Claim
36 words
The process of claim 1 wherein the catalyst is selected from the group consisting of AlR3 and AlR2X where R is a straight chain alkyl group having 1 to 12 carbon atoms and X is halogen.
Claim 4
Dependent Claim
15 words
The process of claim 1 wherein the catalyst is triethyl aluminum or diethyl alumiNum chloride.
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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) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |