Patent US2183509A successfully refreshed from Google Patents.
US4831094A
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Articles having shape recovering properties and a method for using it
Assignee: Orkem SA
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Filing: 1987-11-03
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Granted: 1989-05-16
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Expires: 2007-11-03
Abstract
Abstract Articles having shape recovering properties and methods of using them are disclosed. An article is formed from a composition containing a norbornene polymer by forming said polymer into an article having a first shape, then deforming the article in the solid state to a second shape and cooling the article to a first temperature at or below the glass transition temperature of the polymer to retain said second shape, and finally heating said article to a temperature above the first temperature to recover the first shape.
Inventors
- 👤 Claude Stein
- 👤 Hitoshi Nagai
- 👤 Akio Ueda
- 👤 Satoru Isomura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:31
CPC Classifications
C; C08; C08L; C08L65/00; B; B29; B29C; B29C61/00; B29C61/003; B29C35/00; B29C35/02; B29C35/04; B29C35/049; B29K; B29K2023/00; B29K2025/00; B29K2033/00; B29K2033/04; B29K2086/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
149 words
A method of using a shaped article having shape recovering properties and formed from a composition comprising at least 25% by weight of a polymer selected from the group consisting of amorphous and semi-crystalline homopolymers and copolymers of norbornene and its alkylated, cyano, alkoxylated, mono- or diesterified, imides and carboxylic acid derivatives; homopolymers and copolymers of dimethanooctahydronaphthalene and its derivatives; a copolymer of dimethanooctahydronaphthalene and a monomer selected from the group consisting of norbornene and its derivatives, styrene, acenaphthalene and dicyclopentadiene, said method comprising forming said composition into an article having a first shape, deforming said article in the solid state to a second shape, cooling said article to a first temperature at or below the glass transition temperature of said composition, at which first temperature said composition stably maintains said second shape, and heating said article to a temperature above said first temperature thereby recovering said first shape.
Claim 2
Independent Claim
149 words
A method of using a shaped article having shape recovering properties and formed from a composition comprising at least 25% by weight of a polymer selected from the group consisting of amorphous and semi-crystalline homopolymers and copolymers of norbornene and its alkylated, cyano, alkoxylated, mono- or diesterified, imides and carboxylic acid derivatives; homopolymers and copolymers of dimethanooctahydronaphthalene and its derivatives; a copolymer of dimethanooctahydronaphthalene and a monomer selected from the group consisting of norbornene and its derivatives, styrene, acenaphthalene and dicyclopentadiene, said method comprising forming said composition into an article having a first shape, deforming said article in the solid state to a second shape, cooling said article to a first temperature at or below the glass transition temperature of said composition, at which first temperature said composition stably maintains said second shape, and heating said article to a temperature above said first temperature thereby recovering said first shape.
Claim 3
Dependent Claim
18 words
The method according to claim 1 wherein said polymer has a molecular weight of between 300,000 and 4,000,000.
Claim 4
Dependent Claim
21 words
The method according to claim 1 wherein said polymer has a glass transition temperature of between -90° C. and +200° C.
Claim 5
Dependent Claim
22 words
The method according to claim 3 wherein said polymer has a glass transition temperature of between +10° C. and 30 120° C.
Claim 6
Dependent Claim
13 words
The method according to claim 1 wherein said polymer is halogenated or hydrogenated.
Claim 7
Dependent Claim
20 words
The method according to claim 1 wherein said composition further comprises up to 10% by weight of an oily component.
Claim 8
Dependent Claim
22 words
The method according to claim 1 wherein the article is deformed at a temperature lower than the handling temperature of the polymer.
Claim 9
Dependent Claim
19 words
The method according to claim 1 wherein said composition comprises less than 75% by weight of a thermoplastic polymer.
Claim 10
Dependent Claim
20 words
The method according to claim 1 wherein said composition further comprises up to 10% by weight of a crosslinking agent.
Claim 11
Dependent Claim
24 words
The method according to claim 9 wherein said thermoplastic polymer is selected from polystyrene, polyvinylchloride, polyethylene, polypropylene, polybut-1-ene, polymethylmethacrylate, acrylonitrile-butadiene-stryene copolymers and hydrocarbon resins.
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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) | 1992-05-15 | 1992-11-14 | 1993-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-15 | 1996-11-14 | 1997-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-15 | 2000-11-14 | 2001-05-16 | $7700.00 | Window Closed / Lapsed |