US3898253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Remoldable halobutyl rubbers
Assignee: Polysar Ltd
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Filing: 1974-09-06
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Granted: 1975-08-05
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Expires: 1994-09-06
Abstract
Abstract Halobutyl rubber compositions which are rubbery and elastic at room temperatures but which can be softened and remolded on shearing and/or heating comprise the reaction product of a halobutyl copolymer and a tertiary amine.
Inventors
- 👤 Ernest Jack Buckler
- 👤 John Robert Dunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:15
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/30; C08F8/32; C08K; C08K5/00; C08K5/16; C08K5/17
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
10 words
A REMOLDABLE HALOBUTYL RUBBER COMPOSITION COMPRISING THE REACTION PRODUCT OF
Claim 2
Dependent Claim
10 words
A REMOLDABLE HALOBUTYL RUBBER COMPOSITION COMPRISING THE REACTION PRODUCT OF
Claim 3
Dependent Claim
32 words
A COPOLYMER OF ISOBUTYLENE WITH ABOUT -1-15 WT. % ISOPRENE AND CONTAINING 0.5-15 WT. % BROMINE OR CHLORINE, AND II. AT LEAST ONE TERTIARY AMINE COMPOUND SELECTED FROM A. COMPOUNDS OF STRUCTURE
Claim 4
Dependent Claim
32 words
A COPOLYMER OF ISOBUTYLENE WITH ABOUT -1-15 WT. % ISOPRENE AND CONTAINING 0.5-15 WT. % BROMINE OR CHLORINE, AND II. AT LEAST ONE TERTIARY AMINE COMPOUND SELECTED FROM A. COMPOUNDS OF STRUCTURE
Claim 5
Dependent Claim
18 words
The composition of claim 1 wherein the copolymer is a copolymer of isobutylene with 0.3-5 wt. % isoprene.
Claim 6
Dependent Claim
18 words
The composition of claim 2 wherein the copolymer contains from 1 to 7.5 wt. % bromine or chlorine.
Claim 7
Dependent Claim
39 words
The composition of claim 3 in admixture with an unreactive finely filler selected from silica, talc or calcium carbonate in an amount of from about 20 to about 150 parts by weight per 100 parts by weight of copolymer.
Claim 8
Dependent Claim
40 words
The composition of claim 1 wherein the tertiary amine is selected from N,N-dimethyl hexylamine, N,N-dimethyl dodecylamine, N,N-dimethyl octadecylamine, N,N-dimethyl benzylamine, N,N,N'',N''-tetramethyl hexamethylene diamIne, N,N,N'',N'''',N'''''',N''''''-hexamethyl triethylene tetramine, N,N,N'',N''-tetramethyl tetraethylene pentamine, N-methyl piperidine, N-methyl piperazine, N,N''-dimethyl piperazine, triethylene diamine and mixtures thereof.
Claim 9
Dependent Claim
14 words
The composition of claim 5 wherein the tertiary amine is N,N, N'',N''-tetramethyl hexamethylene diamine.
Claim 10
Dependent Claim
12 words
The composition of claim 5 wherein the tertiary amine is N,N-dimethyl dodecylamine.
Claim 11
Dependent Claim
41 words
A process for preparing remoldable halobutyl rubber compositions which comprises reacting I. a copolymer of isobutylene with about 0.1-15 wt. % isoprene and containing 0.5-15 wt. % bromine or chlorine, with II. a tertiary amine selected from A. compounds of structure
Claim 12
Dependent Claim
41 words
A process for preparing remoldable halobutyl rubber compositions which comprises reacting I. a copolymer of isobutylene with about 0.1-15 wt. % isoprene and containing 0.5-15 wt. % bromine or chlorine, with II. a tertiary amine selected from A. compounds of structure
Claim 13
Dependent Claim
26 words
The process of claim 8 wherein said heating is at temperatures of from 75* - 175*C, for a time of from 5 minutes to 8 hours.
Claim 14
Dependent Claim
47 words
The process of claim 8 which also contains the step of adding to the rubber composition non-reactive finely divided filler selected from silica, talc or calcium carbonate in an amount of from about 20 to about 150 parts by weight per 100 parts by weight of copolymer.
Claim 15
Dependent Claim
31 words
The process of claim 8 in which the rubber composition is remolded and reshaped by heating to a temperature of about 100* to 200*C followed by cooling to below about 50*C.
Claim 16
Dependent Claim
53 words
The process of claim 10 wherein the reaction takes place by adding said filler to said copolymer and forming an intimate mixture thereof, then mixing in the tertiary amine and then heating the mixture to a temperature of about 75* to 175*C for a time of from about 5 minutes to 8 hours.
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) | 1978-08-04 | 1979-02-03 | 1979-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-04 | 1983-02-03 | 1983-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-04 | 1987-02-03 | 1987-08-05 | $7700.00 | Window Closed / Lapsed |