US4217424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impact modification of polyglutarimides
Assignee: Rohm and Haas Co
•
Filing: 1979-05-07
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Granted: 1980-08-12
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Expires: 1999-05-07
Abstract
Abstract A synergistic blend of impact strength modifiers for polyglutarimides, and a process for impact modification of polyglutarimides is disclosed.
Inventors
- 👤 Richard H. Weese
- 👤 Thomas M. Yarnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:51
CPC Classifications
C; C08; C08L; C08L33/00; C08L33/24
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
61 words
Process for improving the impact strength of polyglutarimides comprising blending therewith a mixture of at least two multiple stage polymer impact modifiers, said impact modifiers having rubbery cores and hard polymer shells, one of said impact modifiers having a core polymerized from butadiene and the second of said impact modifiers having a core polymerized from C 2 -C 6 alkyl acrylate.
Claim 2
Dependent Claim
61 words
Process for improving the impact strength of polyglutarimides comprising blending therewith a mixture of at least two multiple stage polymer impact modifiers, said impact modifiers having rubbery cores and hard polymer shells, one of said impact modifiers having a core polymerized from butadiene and the second of said impact modifiers having a core polymerized from C 2 -C 6 alkyl acrylate.
Claim 3
Dependent Claim
36 words
Process of claim 1 wherein the hard polymer shells of said impact modifiers are polymerized from a monomer system comprised of one or more monomers selected from the group consisting of methyl methacrylate, styrene, and acrylonitrile.
Claim 4
Dependent Claim
22 words
Process of claim 1 wherein each of said impact modifiers comprises about 1 to 100 parts by weight per 100 parts polyglutarimide.
Claim 5
Dependent Claim
15 words
Process of claim 1 further including about 1 to 100 parts by weight of polycarbonate.
Claim 6
Dependent Claim
18 words
Process of claim 1 wherein said polycarbonate has a molecular weight of about 20,000 to 32,000, number average.
Claim 7
Dependent Claim
31 words
Process of claim 1 wherein said polyglutarimide is prepared by imidizing a polymer or copolymer of methyl methacrylate, and about 50 to 92%, by mole, of the methacrylate groups are imidized.
Claim 8
Dependent Claim
14 words
Composition produced by the process of claims 1, 2, 3, 4, 5 or 6.
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) | 1983-08-12 | 1984-02-11 | 1984-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-12 | 1988-02-11 | 1988-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-12 | 1992-02-11 | 1992-08-12 | $7700.00 | Window Closed / Lapsed |