Patent US3919353A successfully refreshed from Google Patents.
US3919353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impact resistant polyesters comprising a crosslinked rubbery polymer
Assignee: Montedison SpA
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Filing: 1972-08-03
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Granted: 1975-11-11
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Expires: 1992-08-03
Abstract
Abstract Molding compositions based on saturated linear polyesters of aliphatic or aromatic dicarboxylic acids and aliphatic or cycloaliphatic diols and having dispersed therein, for increasing the impact resistance of and resilience of the polyester, a polymer having a second order transition temperature lower than 0*C and which, in a preferred embodiment, is grafted with polymeric chains of polar and/or polarizable monomers or contains, in its chain, monomers containing polar and/or polarizable groups, such as, e.g., a copolymer and butadiene and styrene cross-linked and grafted with styrene and methyl methacrylate.
Inventors
- 👤 Lucio Castelnuovo
- 👤 Andrea Mattiussi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:57
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A PROCESS FOR PRODUCING AN IMPACT RESISTANT POLYESTER MOLDING COMPOSITION WHICH COMPRISES DISPERSING IN A MATRIXISPO OF A LINEAPOLYESTER OF N AROMATIC DICARBOXYL ACID OR OF A MIXTURE OF SAID AROMATIC ACID ACID WITH A SMALL AMOUNT OF AN ALIPHATIC DICARBOXYL ACID, AND AN ALIPHATIC OR CYCLOALIPHATIC SATURATED DIOL, SAID POLYESTER HAVING AN INTRINISC VISCOSITY COMPRISED BETWEEN 0.65 DL/G AND 1.5 D/G, FROM 3-30% BY WEIGHT ON THE WEIGHT OF THE COMPOSITION OF A POLYMERIC MATERIAL HAVING A SECOND ORDER TRANSITION TEMPERATURE LOWER THAN 0*C AND SELECTED FROM THE GROUP CONSISTING OF POLYBUTADIENE, BUTADIENE-STRENE COPOLYMERS, BUTADIENE-ACYLONITRILE COPOLYMERS, ETHYLENE-PROPYLENE RUBBERS, POLYISOBUTENE AND POLYISOPRENE AND CROSSLINKED FOR AT LEAST 30% BY WEIGHT AND GRAFTED WITH MONOMERS SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ESTER OF SATURATED ALIPHATIC ALCOHOLS, METHACRYLIC ESTERS OF SATURATED ALIPHATIC ALCOHOLS, VINYL ACETATE, ACRYLONITRILE, STYRENE AND ALKYL STYRENE.
Claim 2
Dependent Claim
139 words
A PROCESS FOR PRODUCING AN IMPACT RESISTANT POLYESTER MOLDING COMPOSITION WHICH COMPRISES DISPERSING IN A MATRIXISPO OF A LINEAPOLYESTER OF N AROMATIC DICARBOXYL ACID OR OF A MIXTURE OF SAID AROMATIC ACID ACID WITH A SMALL AMOUNT OF AN ALIPHATIC DICARBOXYL ACID, AND AN ALIPHATIC OR CYCLOALIPHATIC SATURATED DIOL, SAID POLYESTER HAVING AN INTRINISC VISCOSITY COMPRISED BETWEEN 0.65 DL/G AND 1.5 D/G, FROM 3-30% BY WEIGHT ON THE WEIGHT OF THE COMPOSITION OF A POLYMERIC MATERIAL HAVING A SECOND ORDER TRANSITION TEMPERATURE LOWER THAN 0*C AND SELECTED FROM THE GROUP CONSISTING OF POLYBUTADIENE, BUTADIENE-STRENE COPOLYMERS, BUTADIENE-ACYLONITRILE COPOLYMERS, ETHYLENE-PROPYLENE RUBBERS, POLYISOBUTENE AND POLYISOPRENE AND CROSSLINKED FOR AT LEAST 30% BY WEIGHT AND GRAFTED WITH MONOMERS SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ESTER OF SATURATED ALIPHATIC ALCOHOLS, METHACRYLIC ESTERS OF SATURATED ALIPHATIC ALCOHOLS, VINYL ACETATE, ACRYLONITRILE, STYRENE AND ALKYL STYRENE.
References Cited (Backward Citations)
US3345434A
Cited
US3723574A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |