Patent US4782122A successfully refreshed from Google Patents.
US4782122A
Expired / Lapsed
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Impact modifier for imide containing copolymers
Assignee: Lyondell Chemical Technology LP
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Filing: 1987-05-15
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Granted: 1988-11-01
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Expires: 2007-05-15
Abstract
Abstract An A-B-A triblock copolymer particularly suitable for use as an impact modifier for thermoplastic molding compositions containing an imide containing copolymer is disclosed. Molded compositions of the invention exhibit excellent impact strength and heat resistance and are transparent.
Inventors
- 👤 Barry D. Dean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:39
CPC Classifications
C; C08; C08L; C08L53/00; C08L79/00; C08L79/04; C08L79/08
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
19 words
An A-B-A triblock copolymer wherein each A separately represents a poly(2-alkyl-2-oxazoline) end block and B represents a polyisobutylene midblock.
Claim 2
Dependent Claim
19 words
An A-B-A triblock copolymer wherein each A separately represents a poly(2-alkyl-2-oxazoline) end block and B represents a polyisobutylene midblock.
Claim 3
Dependent Claim
1 words
Poly(2-methyl-2-oxazoline)-b-polyisobutylene-b-poly(2-methyl-2-oxazoline).
Claim 4
Dependent Claim
1 words
Poly(2-methyl-2-oxazoline)-b-polyisobutylene-b-poly(2-methyl-2-oxazoline).
Claim 5
Dependent Claim
1 words
Poly(2-ethyl-2-oxazoline)-b-polyisobutylene-b-poly(2-ethyl-2-oxazoline).
Claim 6
Dependent Claim
1 words
Poly(2-ethyl-2-oxazoline)-b-polyisobutylene-b-poly(2-ethyl-2-oxazoline).
Claim 7
Dependent Claim
1 words
Poly(2-propyl-2-oxazoline)-b-polyisobutylene-b-poly(2-propyl-2-oxazoline).
Claim 8
Dependent Claim
1 words
Poly(2-propyl-2-oxazoline)-b-polyisobutylene-b-poly(2-propyl-2-oxazoline).
Claim 9
Dependent Claim
33 words
The A-B-A triblock copolymer of claim 1 which comprises in weight percent from about 10 to about 35 of said poly(2-alkyl-2-oxazoline) end blocks and about 90 to about 65 of said polyisobutylene midblock.
Claim 10
Dependent Claim
27 words
The A-B-A triblock copolymer of claim 1 in which the number average molecular weight (Mn) of the poly(2-alkyl-2-oxazoline) end blocks is from about 12,000 to about 30,000.
Claim 11
Dependent Claim
26 words
The A-B-A triblock copolymer of claim 1 in which the number average molecular weight (Mn) of the polyisobutylene midblock is from about 50,000 to about 100,000.
Claim 12
Dependent Claim
59 words
An impact strength modifier for moldable thermoplastic compositions which comprise at least one copolymer having recurring units of an imide monomer bearing an active hydrogen having a pKa value of from about 4 to about 11, said impact strength modifier being an A-B-A triblock copolymer wherein each A separately represents poly(2-alkyl-2-oxazoline) end block and B represents a polyisobutylene midblock.
Claim 13
Dependent Claim
59 words
An impact strength modifier for moldable thermoplastic compositions which comprise at least one copolymer having recurring units of an imide monomer bearing an active hydrogen having a pKa value of from about 4 to about 11, said impact strength modifier being an A-B-A triblock copolymer wherein each A separately represents poly(2-alkyl-2-oxazoline) end block and B represents a polyisobutylene midblock.
Claim 14
Dependent Claim
39 words
The impact strength modifier of claim 8 in which said A-B-A triblock copolymer comprises in weight percent from about 10 to about 35 of said poly(2-alkyl-2-oxazoline) end blocks and from about 90 to about 65 of said polyisobutylene midblock.
References Cited (Backward Citations)
US4186191A
Cited
US4261925A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-01 | 1992-05-02 | 1992-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-01 | 1996-05-02 | 1996-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-01 | 2000-05-02 | 2000-11-01 | $7700.00 | Window Closed / Lapsed |