US4029718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pivalolactone random graft copolymers
Assignee: EIDP Inc
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Filing: 1975-05-20
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Granted: 1977-06-14
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Expires: 1995-05-20
Abstract
Abstract Disclosed herein are random graft copolymer compositions comprising base polymers that are amorphous to x-rays at a temperature of 130° C or below, to which base polymer is randomly grafted, on the average, at least one sidechain of crystallizable homopolymers of α-substituted-β-propiolactones and/or copolymers thereof; a process for making said random graft compositions; and use thereof, inter alia, as molded or extruded articles.
Inventors
- 👤 Sherman A. Sundet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:11
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/42; C08G; C08G63/00; C08G63/02; C08G63/06; C08G63/08
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
122 words
A thermoplastic random organic graft copolymer formed by contacting an amorphous base polymer having at least one random carbanion site thereon with up to 150% by weight of the polymer, of at least one α-substituted-β-propiolactone in an amount such that the ratio of the moles of β-lactone to the moles of anionic sites on the base polymer varies between 3 to 1000, and polymerizing said β-lactone to form crystallizable polymer sidechains, said sidechains having a length of between 3 to 1000 monomer units and a weight of up to 60% of the graft composition, said base polymer being characterized in that it is amorphous to X-rays at a temperature of 130° C or below, and has a molecular weight of above 2,000.
Claim 2
Dependent Claim
122 words
A thermoplastic random organic graft copolymer formed by contacting an amorphous base polymer having at least one random carbanion site thereon with up to 150% by weight of the polymer, of at least one α-substituted-β-propiolactone in an amount such that the ratio of the moles of β-lactone to the moles of anionic sites on the base polymer varies between 3 to 1000, and polymerizing said β-lactone to form crystallizable polymer sidechains, said sidechains having a length of between 3 to 1000 monomer units and a weight of up to 60% of the graft composition, said base polymer being characterized in that it is amorphous to X-rays at a temperature of 130° C or below, and has a molecular weight of above 2,000.
Claim 3
Dependent Claim
27 words
A graft copolymer according to claim 1 wherein the sidechains consist essentially of pivalolactone homopolymer and have a length of between about 5 to 75 monomer units.
Claim 4
Dependent Claim
32 words
A graft copolymer according to claim 1 wherein the base polymer has carbanion sites selected from the group consisting of allylic and benzylic carbanion sites and the sidechains consist essentially of polypivalolactone.
Claim 5
Dependent Claim
15 words
A graft copolymer according to claim 3, wherein the base polymer has allylic carbanion sites.
Claim 6
Dependent Claim
13 words
A graft copolymer according to claim 4, wherein the base polymer is polyisoprene.
Claim 7
Dependent Claim
13 words
A graft copolymer according to claim 4, wherein the base polymer is polybutadiene.
Claim 8
Dependent Claim
18 words
A graft copolymer according to claim 4, wherein the base polymer is branched chain ethylene/propylene 1,4-hexadiene/nonconjugated diene tetrapolymer.
Claim 9
Dependent Claim
15 words
A graft copolymer according to claim 3, wherein the base polymer has benzylic carbanion sites.
Claim 10
Dependent Claim
15 words
A graft copolymer according to claim 8, wherein the base polymer is vinyl aromatic/alkadiene copolymer.
Claim 11
Dependent Claim
14 words
A graft copolymer according to claim 9, wherein the base polymer is styrene/butadiene copolymer.
Claim 12
Dependent Claim
8 words
A film of the copolymer of claim 1.
Claim 13
Dependent Claim
10 words
A fiber of the copolymer of claim 1. (I.V.= C.
Claim 14
Dependent Claim
9 words
A molded article of the copolymer of claim 1.
Claim 15
Dependent Claim
9 words
An extruded article of the copolymer of claim 1.
Claim 16
Dependent Claim
119 words
A process comprising contacting an amorphous base polymer having at least one random carbanion site thereon with up to 150% by weight of the base polymer, of at least one α-substituted-β-propiolactone in an amount such that the ratio of the moles of β-lactone to the moles of anionic sites on the base polymer varies between 3 to 1000 and polymerizing said β-lactone to form crystallizable polymer sidechains, said sidechains having a length of between 3 to 1,000 monomer units and a weight of up to about 60% of the graft composition, said base polymer being characterized in that it is amorphous to X-rays at a temperature of 130° C or below and has a molecular weight of above 2,000.
Claim 17
Dependent Claim
119 words
A process comprising contacting an amorphous base polymer having at least one random carbanion site thereon with up to 150% by weight of the base polymer, of at least one α-substituted-β-propiolactone in an amount such that the ratio of the moles of β-lactone to the moles of anionic sites on the base polymer varies between 3 to 1000 and polymerizing said β-lactone to form crystallizable polymer sidechains, said sidechains having a length of between 3 to 1,000 monomer units and a weight of up to about 60% of the graft composition, said base polymer being characterized in that it is amorphous to X-rays at a temperature of 130° C or below and has a molecular weight of above 2,000.
Claim 18
Dependent Claim
16 words
A process according to claim 15, comprising contacting base polymer and the β-lactone in the melt.
Claim 19
Dependent Claim
9 words
A process according to claim 16, carried out neat.
References Cited (Backward Citations)
US3800006A
Cited
US3897513A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-13 | 1980-12-13 | 1981-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-13 | 1984-12-13 | 1985-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-13 | 1988-12-13 | 1989-06-14 | $7700.00 | Window Closed / Lapsed |