US4264487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylate rubber modification of aromatic polyesters
Assignee: Rohm and Haas Co
•
Filing: 1979-09-07
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Granted: 1981-04-28
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Expires: 1999-09-07
Abstract
Abstract Compositions comprised of synergistic amounts of aromatic polycarbonate, acrylate-based core-shell polymer, and aromatic polyester are disclosed.
Inventors
- 👤 Harry C. Fromuth
- 👤 Kenneth M. Shell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:58
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
88 words
A composition having high impact resistance comprising: (a) about 25-95% of an aromatic polyester; (b) about 1 to 50% by weight of an aromatic polycarbonate; (c) the balance to make 100% of a core/shell polymer comprising about 25-95% by weight of a first elastomeric phase polymerized from a monomer system comprising about 75 to 99.8% by weight of a (C 1 -C 6 ) alkyl acrylate, 0.1 to 5% crosslinking monomer, and 0.1 to 5% graftlinking monomer, and about 75 to 5% of a final, rigid thermoplastic phase.
Claim 2
Dependent Claim
88 words
A composition having high impact resistance comprising: (a) about 25-95% of an aromatic polyester; (b) about 1 to 50% by weight of an aromatic polycarbonate; (c) the balance to make 100% of a core/shell polymer comprising about 25-95% by weight of a first elastomeric phase polymerized from a monomer system comprising about 75 to 99.8% by weight of a (C 1 -C 6 ) alkyl acrylate, 0.1 to 5% crosslinking monomer, and 0.1 to 5% graftlinking monomer, and about 75 to 5% of a final, rigid thermoplastic phase.
Claim 3
Dependent Claim
12 words
The composition of claim 1 wherein the aromatic polyester is poly(ethylene terephthalate).
Claim 4
Dependent Claim
20 words
The composition of claim 2 wherein the poly(ethylene terephthalate) has an estimated intrinsic viscosity range of about 0.3 to 2.5.
Claim 5
Dependent Claim
15 words
The composition of claim 1 wherein said graftlinker monomer is allyl methacrylate or diallyl maleate.
Claim 6
Dependent Claim
12 words
The composition of claim 1 wherein the crosslinking monomer is butylene diacrylate.
Claim 7
Dependent Claim
33 words
The composition of claim 1 wherein said final rigid thermoplastic phase is polymerized from a monomer system comprising about 50 to 100% by weight of a C 1 to C 4 alkyl methacrylate.
Claim 8
Dependent Claim
25 words
The composition of claim 1 wherein the core/shell polymer contains an intermediate phase polymerized of a monomer system comprising from 75-100% by weight of styrene.
Claim 9
Dependent Claim
16 words
The composition of claim 1 further including filler comprising particulate filler, fibrous reinforcement, or combinations thereof.
Claim 10
Dependent Claim
27 words
The composition of claim 1 further including about 10 to 150 parts by weight of glass fiber reinforcement based on 100 parts of (A), (B), and (C).
Claim 11
Dependent Claim
19 words
The composition of claim 1 wherein the aromatic polycarbonate (B) is the reaction product of phosgene and bisphenol A.
Claim 12
Dependent Claim
11 words
An injection molded article molded from the composition of claim 1.
Claim 13
Dependent Claim
20 words
The composition of claim 1 further including up to 20% flame retardant, colorant, blowing agent, plasticizer, stabilizer and nucleating agents.
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) | 1984-04-27 | 1984-10-27 | 1985-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-27 | 1988-10-27 | 1989-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-27 | 1992-10-27 | 1993-04-28 | $7700.00 | Window Closed / Lapsed |