Patent US5174257A successfully refreshed from Google Patents.
Patent US4713268A successfully refreshed from Google Patents.
US4713268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystallizable polyester resin having high impact strength and dimensional stability
Assignee: Rohm and Haas Co
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Filing: 1986-12-05
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Granted: 1987-12-15
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Expires: 2006-12-05
Abstract
Abstract Strong, tough, ovenable trays may be formed from poly(ethylene terephthalate) modified with 4-29% core/shell polymer, 0-14.5% aromatic polycarbonate and 1-5% aromatic polyester crystallization-rate accelerator.
Inventors
- 👤 William G. Carson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:48
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1386; Y10T428/31504; Y10T428/31786; Y10T428/31797
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
195 words
A tough, ovenable tray comprising a thermoformed, crystalline sheet of modified polyester resin, the resin comprising (A) from about 70 to about 95% of a poly(ethylene terephthalate) resin having an intrinsic viscosity from about 0.7 to about 1.1 dl/g, (B) from about 4 to about 29% of core/shell polymer having (1) from about 25 to about 95% of a first elastomeric phase polymerized from a monomer system comprising (a) from about 75 to about 99.8% of a monomer or monomer mixture which yields a rubbery polymer on polymerization, (b) from about 0.1 to about 5% crosslinking monomer, and (c) from about 0 to about 5% graftlinking monomer, and (2) from about 5 to about 75% of a rigid vinyl thermoplastic phase polymerized from a monomer system comprising from about 50 to 100% of an alkyl methacrylate wherein the alkyl group has from 1 to 4 carbon atoms, (C) from about 1 to about 5% of a poly(alkylene terephthalate) crystallization-rate accelerator, the alkylene group having from 4 to 6 carbon atoms, and (D) from 0 to about 14.5% of an aromatic polycarbonate of a di(monohydroxyphenol)-substituted aliphatic hydrocarbon wherein the hydrocarbon has 2 to 4 carbon atoms.
Claim 2
Dependent Claim
195 words
A tough, ovenable tray comprising a thermoformed, crystalline sheet of modified polyester resin, the resin comprising (A) from about 70 to about 95% of a poly(ethylene terephthalate) resin having an intrinsic viscosity from about 0.7 to about 1.1 dl/g, (B) from about 4 to about 29% of core/shell polymer having (1) from about 25 to about 95% of a first elastomeric phase polymerized from a monomer system comprising (a) from about 75 to about 99.8% of a monomer or monomer mixture which yields a rubbery polymer on polymerization, (b) from about 0.1 to about 5% crosslinking monomer, and (c) from about 0 to about 5% graftlinking monomer, and (2) from about 5 to about 75% of a rigid vinyl thermoplastic phase polymerized from a monomer system comprising from about 50 to 100% of an alkyl methacrylate wherein the alkyl group has from 1 to 4 carbon atoms, (C) from about 1 to about 5% of a poly(alkylene terephthalate) crystallization-rate accelerator, the alkylene group having from 4 to 6 carbon atoms, and (D) from 0 to about 14.5% of an aromatic polycarbonate of a di(monohydroxyphenol)-substituted aliphatic hydrocarbon wherein the hydrocarbon has 2 to 4 carbon atoms.
Claim 3
Dependent Claim
22 words
The ovenable tray of claim 1 wherein the intrinsic viscosity of the poly(ethylene terephthalate) is from about 0.72 to about 0.95 dl/g.
Claim 4
Dependent Claim
19 words
The ovenable tray of claim 1 wherein the crosslinking monomer in the first elastomeric phase is butylene glycol dimethacrylate.
Claim 5
Dependent Claim
17 words
The ovenable tray of claim 1 wherein the crosslinking monomer in the first elastomeric phase is divinylbenzene.
Claim 6
Dependent Claim
19 words
The ovenable tray of claim 1 wherein the monomer mixture which yields a rubbery polymer on polymerization includes butadiene.
Claim 7
Dependent Claim
24 words
The ovenable tray of claim 1 wherein the monomer mixture which yields a rubbery polymer on polymerization comprises a mixture of butadiene and styrene.
Claim 8
Dependent Claim
20 words
The ovenable tray of claim 1 wherein the glass-transition temperature of the first elastomeric phase is below about 0° C.
Claim 9
Dependent Claim
13 words
The ovenable tray of claim 1 wherein the crystallization-rate accelerator is poly(butylene terephthalate).
Claim 10
Dependent Claim
22 words
The ovenable tray of claim 8 wherein the poly(butylene terephthalate) has an intrinsic viscosity of from about 0.9 to about 1.2 dl/g.
Claim 11
Dependent Claim
19 words
The ovenable tray of claim 1 wherein the monomer which yields a rubbery polymer on polymerization is butyl acrylate.
Claim 12
Dependent Claim
19 words
The ovenable tray of claim 7 wherein the graftlinking monomer is present at from about 0.1% to about 5%.
Claim 13
Dependent Claim
18 words
The ovenable tray of claim 7 wherein the graftlinking monomer in the first elastomeric phase is allyl methacrylate.
Claim 14
Dependent Claim
184 words
A rapid-crystallizing, modified polyester resin comprising (A) from about 70 to about 95% of a poly(ethylene terephthalate) resin having an intrinsic viscosity of from about 0.7 to about 1.1 dl/g, (B) from about 4 to about 29% of a core/shell polymer having (1) from about 25 to about 95% of a first elastomeric phase polymerized from a monomer system comprising (a) from about 75 to about 99.8% of a monomer or monomer mixture which yields a rubbery polymer on polymerization, (b) from about 0.1 to about 5% crosslinking monomer, and (c) from about 0 to about 5% graftlinking monomer, and (2) from about 5 to about 75% of a rigid vinyl thermoplastic phase polymerized from a monomer system comprising from about 50 to 100% of an alkyl methacrylate wherein the alkyl group has from 1 to 4 carbon atoms, (C) from about 1 to about 5% of poly(alkylene terephthalate), the alkylene group having from 4 to 6 carbon atoms, and (D) from 0 to about 14.5% of an aromatic polycarbonate of a di(monohydroxyphenol)-substituted aliphatic hydrocarbon wherein the hydrocarbon has 2 to 4 carbon atoms.
Claim 15
Dependent Claim
184 words
A rapid-crystallizing, modified polyester resin comprising (A) from about 70 to about 95% of a poly(ethylene terephthalate) resin having an intrinsic viscosity of from about 0.7 to about 1.1 dl/g, (B) from about 4 to about 29% of a core/shell polymer having (1) from about 25 to about 95% of a first elastomeric phase polymerized from a monomer system comprising (a) from about 75 to about 99.8% of a monomer or monomer mixture which yields a rubbery polymer on polymerization, (b) from about 0.1 to about 5% crosslinking monomer, and (c) from about 0 to about 5% graftlinking monomer, and (2) from about 5 to about 75% of a rigid vinyl thermoplastic phase polymerized from a monomer system comprising from about 50 to 100% of an alkyl methacrylate wherein the alkyl group has from 1 to 4 carbon atoms, (C) from about 1 to about 5% of poly(alkylene terephthalate), the alkylene group having from 4 to 6 carbon atoms, and (D) from 0 to about 14.5% of an aromatic polycarbonate of a di(monohydroxyphenol)-substituted aliphatic hydrocarbon wherein the hydrocarbon has 2 to 4 carbon atoms.
Claim 16
Dependent Claim
23 words
The modified polyester resin of claim 13 wherein the intrinsic viscosity of the poly(ethylene terephthalate) is from about 0.72 to about 0.95 dl/g.
Claim 17
Dependent Claim
14 words
The modified polyester resin of claim 13 wherein the crystallization-rate accelerator is poly(butylene terephthalate).
Claim 18
Dependent Claim
23 words
The modified polyester resin of claim 15 wherein the poly(butylene terephthalate) has an intrinsic viscosity of from about 0.9 to about 1.2 dl/g.
Claim 19
Dependent Claim
20 words
The modified polyester resin of claim 13 wherein the crosslinking monomer in the first elastomeric phase is butylene glycol dimethacrylate.
Claim 20
Dependent Claim
18 words
The modified polyester resin of claim 13 wherein the crosslinking monomer in the first elastomeric phase is divinylbenzene.
Claim 21
Dependent Claim
20 words
The modified polyester resin of claim 13 wherein the monomer mixture which yields a rubbery polymer on polymerization includes butadiene.
Claim 22
Dependent Claim
25 words
The modified polyester resin of claim 13 wherein the monomer mixture which yields a rubbery polymer on polymerization comprises a mixture of butadiene and styrene.
Claim 23
Dependent Claim
21 words
The modified polyester resin of claim 13 wherein the glass-transition temperature of the first elastomeric phase is below about 0° C.
Claim 24
Dependent Claim
20 words
The modified polyester resin of claim 13 wherein the monomer which yields a rubbery polymer on polymerization is butyl acrylate.
Claim 25
Dependent Claim
20 words
The modified polyester resin of claim 22 wherein the graftlinking monomer is present at from about 0.1 to about 5%.
Claim 26
Dependent Claim
19 words
The modified polyester resin of claim 23 wherein the graftlinking monomer in the first elastomeric phase is allyl methacrylate.
Claim 27
Dependent Claim
194 words
A rapid-crystallizing sheet of amorphous, modified polyester resin suitable for forming tough, ovenable trays comprising (A) from about 70 to about 95% of a poly(ethylene terephthalate) resin having an intrinsic viscosity of from about 0.7 to about 1.1 dl/g, (B) from about 4 to about 29% of a core/shell polymer having (1) from about 25 to about 95% of a first elastomeric phase polymerized from a monomer system comprising (a) from about 75 to about 99.8% of a monomer or monomer mixture which yields a rubbery polymer on polymerization, (b) from about 0.1 to about 5% crosslinking monomer, and (c) from about 0 to about 5% graftlinking monomer, and (2) from about 5 to about 75% of a rigid vinyl thermoplastic phase polymerized from a monomer system comprising from about 50 to 100% of an alkyl methacrylate wherein the alkyl group has from 1 to 4 carbon atoms, (C) from about 1 to about 5% of a poly(alkylene terephthalate), the alkylene group having from 4 to 6 carbon atoms, and (D) from 0 to about 14.5% of an aromatic polycarbonate of a di(monohydroxyphenol)-substituted aliphatic hydrocarbon wherein the hydrocarbon has 2 to 4 carbon atoms.
Claim 28
Dependent Claim
194 words
A rapid-crystallizing sheet of amorphous, modified polyester resin suitable for forming tough, ovenable trays comprising (A) from about 70 to about 95% of a poly(ethylene terephthalate) resin having an intrinsic viscosity of from about 0.7 to about 1.1 dl/g, (B) from about 4 to about 29% of a core/shell polymer having (1) from about 25 to about 95% of a first elastomeric phase polymerized from a monomer system comprising (a) from about 75 to about 99.8% of a monomer or monomer mixture which yields a rubbery polymer on polymerization, (b) from about 0.1 to about 5% crosslinking monomer, and (c) from about 0 to about 5% graftlinking monomer, and (2) from about 5 to about 75% of a rigid vinyl thermoplastic phase polymerized from a monomer system comprising from about 50 to 100% of an alkyl methacrylate wherein the alkyl group has from 1 to 4 carbon atoms, (C) from about 1 to about 5% of a poly(alkylene terephthalate), the alkylene group having from 4 to 6 carbon atoms, and (D) from 0 to about 14.5% of an aromatic polycarbonate of a di(monohydroxyphenol)-substituted aliphatic hydrocarbon wherein the hydrocarbon has 2 to 4 carbon atoms.
Claim 29
Dependent Claim
18 words
The rapid-crystallizing sheet of claim 25 wherein the sheet is from about 0.5 to about 1.5 mm thick.
Claim 30
Dependent Claim
22 words
The rapid-crystallization sheet of claim 25 wherein the intrinsic viscosity of the poly(ethylene terephthalate) is from about 0.72 to about 0.95 dl/g.
Claim 31
Dependent Claim
19 words
The rapid-crystallizing sheet of claim 25 wherein the crosslinking monomer in the first elastomeric phase is butylene glycol dimethacrylate.
Claim 32
Dependent Claim
17 words
The rapid-crystallizing sheet of claim 25 wherein the crosslinking monomer in the first elastomeric phase is divinylbenzene.
Claim 33
Dependent Claim
19 words
The rapid-crystallizing sheet of claim 25 wherein the monomer mixture which yields a rubbery polymer on polymerization includes butadiene.
Claim 34
Dependent Claim
24 words
The rapid-crystallizing sheet of claim 25 wherein the monomer mixture which yields a rubbery polymer on polymerization comprises a mixture of butadiene and styrene.
Claim 35
Dependent Claim
20 words
The rapid-crystallizing sheet of claim 25 wherein the glass-transition temperature of the first elastomeric phase is below about 0° C.
Claim 36
Dependent Claim
22 words
The rapid-crystallizing sheet of claim 25 wherein the intrinsic viscosity of the poly(ethylene terephthalate) is from about 0.7 to about 1.1 dl/g.
Claim 37
Dependent Claim
13 words
The rapid-crystallizing sheet of claim 33 wherein the crystallization-rate accelerator is poly(butylene terephthalate).
Claim 38
Dependent Claim
22 words
The rapid-crystallizing sheet of claim 34 wherein the poly(butylene terephthlate) has an intrinsic viscosity of from about 0.9 to about 1.2 dl/g.
Claim 39
Dependent Claim
19 words
The rapid-crystallizing sheet of claim 25 wherein the monomer which yields a rubbery polymer on polymerization is butyl acrylate.
Claim 40
Dependent Claim
19 words
The rapid-crystallizing sheet of claim 36 wherein the graftlinking monomer is present at from about 0.1 to about 5%.
Claim 41
Dependent Claim
18 words
The rapid-crystallizing sheet of claim 37 wherein the graftlinking monomer in the first elastomeric phase is allyl methacrylate.
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) | 1990-12-14 | 1991-06-15 | 1991-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-14 | 1995-06-15 | 1995-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-14 | 1999-06-15 | 1999-12-15 | $7700.00 | Window Closed / Lapsed |