US4929672A
Expired / Lapsed
US
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Polycarbonate modified with a grafted olefin copolymer
Assignee: Dow Chemical Co
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Filing: 1989-05-04
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Granted: 1990-05-29
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Expires: 2009-05-04
Abstract
Abstract A polycarbonate blend of good impact strength, solvent resistance and weldline properties is prepared by admixing with polycarbonate a grafted olefin/carbon monoxide copolymer and, optionally, a toughening agent such as a rubber.
Inventors
- 👤 Michael K. Laughner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:01
CPC Classifications
C; C08; C08L; C08L51/00; C08L51/08; C08L69/00; C08L69/005
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
34 words
A composition of matter comprising, in admixture, an aromatic polycarbonate and an olefin/carbon monoxide copolymer grafted with one or more vinyl or vinylidene monomers or polymers or copolymers of such monomers or mixtures thereof.
Claim 2
Dependent Claim
34 words
A composition of matter comprising, in admixture, an aromatic polycarbonate and an olefin/carbon monoxide copolymer grafted with one or more vinyl or vinylidene monomers or polymers or copolymers of such monomers or mixtures thereof.
Claim 3
Dependent Claim
18 words
The composition of claim 1 wherein the olefin/carbon monoxide copolymer is grafted with at least one vinyl monomer.
Claim 4
Dependent Claim
39 words
The composition of claim 1 wherein the portion of the grafted olefin/carbon monoxide copolymer derived from the grafting monomer(s), polymer(s), copolymer(s) or mixtures thereof is from about 1% to about 50% by weight of the grafted olefin/carbon monoxide copolymer.
Claim 5
Dependent Claim
34 words
The composition of claim 2 wherein the olefin/carbon monoxide copolymer is grafted with at least one vinyl monomer selected from the group consisting of an acrylate, a methacrylate, an acetate and a mixture thereof.
Claim 6
Dependent Claim
21 words
The composition of claim 4 wherein the olefin/carbon monoxide copolymer is grafted with a mixture of an acrylate and a methacrylate.
Claim 7
Dependent Claim
28 words
The composition of claim 2 wherein the olefin/carbon monoxide copolymer is grafted with a mixture of a vinyl acetate monomer and a vinyl compound derived from acrylic acid.
Claim 8
Dependent Claim
24 words
The composition of claim 2 wherein the olefin/carbon monoxide copolymer is grafted with a mixture of a vinyl aromatic compound and a vinyl cyanide.
Claim 9
Dependent Claim
19 words
The composition of claim 7 wherein the olefin/carbon monoxide copolymer is grafted with a mixture of styrene and acrylonitrile.
Claim 10
Dependent Claim
34 words
The composition of claim 1 wherein the olefin/carbon monoxide copolymer is grafted with one or more polymer(s), copolymer(s) or mixtures thereof polymerized from at least one vinyl monomer, vinylidene monomer or a mixture thereof.
Claim 11
Dependent Claim
15 words
The composition of claim 9 wherein the olefin/carbon monoxide copolymer is grafted with styrene/acrylonitrile copolymer.
Claim 12
Dependent Claim
18 words
The composition of claim 1 wherein said olefin/carbon monoxide copolymer is a copolymer of ethylene and carbon monoxide.
Claim 13
Dependent Claim
25 words
The composition of claim 1 wherein the portion of the olefin/carbon monoxide copolymer derived from carbon monoxide is about 0.1% to about 40% by weight.
Claim 14
Dependent Claim
18 words
The composition of claim 1 further comprising an elastomeric toughening agent containing greater than 40% rubber by weight.
Claim 15
Dependent Claim
40 words
The composition of claim 13 wherein the content thereof is about 40% to about 99% aromatic polycarbonate, about 1% to about 60% grafted olefin/carbon monoxide copolymer, and up to about 20% elastomeric toughening agent, by weight of the total composition.
Claim 16
Dependent Claim
10 words
The composition of claim 13 in dry blended, particulate form.
Claim 17
Dependent Claim
10 words
The composition of claim 13 which as been melt mixed.
Claim 18
Dependent Claim
12 words
The composition of claim 13 in the form of a master batch.
Claim 19
Dependent Claim
12 words
The composition of claim 13 in the form of a molded article.
Claim 20
Dependent Claim
12 words
The composition of claim 13 in the form of an extruded sheet.
Claim 21
Dependent Claim
53 words
The molded article of claim 18 wherein the grafted olefin/carbon monoxide copolymer is an ethylene/carbon monoxide copolymer grafted with styrene and acrylonitrile, and the elastomeric toughening agent contains a core substrate formed from conjugated diene, mono-olefin or polar vinyl compounds, and one or more shells formed from vinyl compounds grafted to such core.
Claim 22
Dependent Claim
31 words
The extruded sheet of claim 19 wherein the grafted olefin/carbon monoxide copolymer is an ethylene/carbon monoxide copolymer grafted with methyl methacrylate, and the elastomeric toughening agent is a butyl acrylate rubber.
Claim 23
Independent Claim
42 words
A method of molding an article from an aromatic polycarbonate comprising molding said aromatic polycarbonate in the presence of an olefin/carbon monoxide copolymer grafted with one or more vinyl or vinylidene monomers or polymers or copolymers of such monomers or mixtures thereof.
Claim 24
Independent Claim
42 words
A method of molding an article from an aromatic polycarbonate comprising molding said aromatic polycarbonate in the presence of an olefin/carbon monoxide copolymer grafted with one or more vinyl or vinylidene monomers or polymers or copolymers of such monomers or mixtures thereof.
Claim 25
Independent Claim
93 words
A method of measurably increasing (a) the percent elongation at break of an aromatic polycarbonate, when tested according to ASTM Designation D 638-84 after having been placed under 0.5% strain while submerged in a bath of 60 wt % isooctane and 40 wt % toluene for 5 minutes and then dried for 24 hours before testing, and (b) the weldline Izod value of said aromatic polycarbonate, comprising admixing with said aromatic polycarbonate an olefin/carbon monoxide copolymer grafted with one or more vinyl vinylidene monomers polymers or copolymers of such monomers or mixtures thereof.
Claim 26
Independent Claim
93 words
A method of measurably increasing (a) the percent elongation at break of an aromatic polycarbonate, when tested according to ASTM Designation D 638-84 after having been placed under 0.5% strain while submerged in a bath of 60 wt % isooctane and 40 wt % toluene for 5 minutes and then dried for 24 hours before testing, and (b) the weldline Izod value of said aromatic polycarbonate, comprising admixing with said aromatic polycarbonate an olefin/carbon monoxide copolymer grafted with one or more vinyl vinylidene monomers polymers or copolymers of such monomers or mixtures thereof.
Claim 27
Independent Claim
113 words
A method of measurably increasing (a) the tensile strength at break of an aromatic polycarbonate, when tested according to ASTM Designation D 638-84 after having been placed under 0.5% strain while submerged in a bath of 60 wt % isooctane and 40 wt % toluene for 5 minutes and then dried for 24 hours before testing, and (b) the highest energy level at which said aromatic polycarbonate shows no crack when subjected to impact by a falling dart on a Gardner drop dart instrument, comprising admixing with said aromatic polycarbonate an olefin/carbon monoxide copolymer grafted with one or more vinyl or vinylidene monomers or polymers or copolymers of such monomers or mixtures thereof.
Claim 28
Independent Claim
113 words
A method of measurably increasing (a) the tensile strength at break of an aromatic polycarbonate, when tested according to ASTM Designation D 638-84 after having been placed under 0.5% strain while submerged in a bath of 60 wt % isooctane and 40 wt % toluene for 5 minutes and then dried for 24 hours before testing, and (b) the highest energy level at which said aromatic polycarbonate shows no crack when subjected to impact by a falling dart on a Gardner drop dart instrument, comprising admixing with said aromatic polycarbonate an olefin/carbon monoxide copolymer grafted with one or more vinyl or vinylidene monomers or polymers or copolymers of such monomers or mixtures thereof.
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) | 1993-05-28 | 1993-11-27 | 1994-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-28 | 1997-11-27 | 1998-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-28 | 2001-11-27 | 2002-05-29 | $7700.00 | Window Closed / Lapsed |