US4929673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polycarbonate/styrenic blends modified with a grafted olefin copolymer
Assignee: Dow Chemical Co
•
Filing: 1989-05-04
•
Granted: 1990-05-29
•
Expires: 2009-05-04
Abstract
Abstract A polycarbonate blend having both improved solvent resistance and improved impact strength comprising in admixture a polycarbonate, a styrenic thermoplastic resin, a grafted olefin/carbon monoxide copolymer and, optionally, a rubber toughening agent.
Inventors
- 👤 Michael K. Laughner
- 👤 Gerald M. Lancaster
- 👤 Yun C. Sun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:35
CPC Classifications
C; C08; C08L; C08L69/00; C08L69/005; C08L25/00; C08L25/02; C08L25/04; C08L25/08; C08L25/12; C08L51/00; C08L51/08
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
38 words
A composition of matter comprising, in admixture, an aromatic polycarbonate, a styrenic thermoplastic resin 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
38 words
A composition of matter comprising, in admixture, an aromatic polycarbonate, a styrenic thermoplastic resin 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) of 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 arcylate, a methacylate, an acetate and a mixture thereof.
Claim 6
Dependent Claim
23 words
The composition of claim 4 wherein the olefin/carbon monoxide copolymer is grafted with a mixture of an acrylate, a methacrylate and an acetate.
Claim 7
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 8
Dependent Claim
19 words
The composition of claim 2 wherein the olefin/carbon monoxide copolymer is grafted with a mixture of styrene and acrylonitrile.
Claim 9
Dependent Claim
26 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 of vinyl and/or vinylidene monomers.
Claim 10
Dependent Claim
15 words
The composition of claim 8 wherein the olefin/carbon monoxide copolymer is grafted with styrene/acrylonitrile copolymer.
Claim 11
Dependent Claim
18 words
The composition of claim 1 wherein said olefin/carbon monoxide copolymer is a copolymer of ethylene and carbon monoxide.
Claim 12
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 13
Dependent Claim
13 words
The composition of claim 1 wherein the styrenic thermoplastic resin is styrene/acrylonitrile copolymer.
Claim 14
Dependent Claim
13 words
The composition of claim 1 wherein the styrenic thermoplastic resin is rubber modified.
Claim 15
Dependent Claim
14 words
The composition of claim 13 wherein the rubber-modified styrenic thermoplastic resin is acrylonitrile/butadiene/styrene copolymer.
Claim 16
Dependent Claim
30 words
The composition of claim 13 wherein the rubber-modified styrenic thermoplastic resin is a product of grafting a copolymer of mono-alkenyl aromatic compounds and alkenyl nitrile compounds to a rubber substrate.
Claim 17
Dependent Claim
30 words
The composition of claim 13 wherein the rubber-modified styrenic thermoplastic resin is a product of cross-linking a copolymer of mono-alkenyl aromatic compounds and alkenyl nitrile compounds to an acrylate elastomer.
Claim 18
Dependent Claim
18 words
The composition of claim 1 further comprising an elastomeric toughening agent containing greater than 40% rubber by weight.
Claim 19
Dependent Claim
48 words
The composition of claim 17 wherein the content thereof is about 9% to about 94% aromatic polycarbonate, about 1% to about 25% grafted olefin/carbon monoxide copolymer, about 5% to about 90% styrenic thermoplastic resin, and up to about 20% elastomeric toughening agent, by weight of the total composition.
Claim 20
Dependent Claim
10 words
The composition of claim 17 in dry blended, particulate form.
Claim 21
Dependent Claim
10 words
The composition of claim 17 which has been melt mixed.
Claim 22
Dependent Claim
12 words
The composition of claim 17 in the form of a master batch.
Claim 23
Dependent Claim
12 words
The composition of claim 17 in the form of a molded article.
Claim 24
Dependent Claim
12 words
The composition of claim 17 in the form of an extruded sheet.
Claim 25
Dependent Claim
60 words
The molded article of claim 22 wherein the styrenic thermoplastic resin is acrylonitrile/butadiene/styrene copolymer, the grafted olefin/carbon monoxide copolymer is an ethylene/carbon monoxide copolymer grated 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 26
Dependent Claim
38 words
The extruded sheet of claim 23 wherein the styrenic thermoplastic resin is acrylonitrile/butadiene/styrene copolymer, 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 27
Independent Claim
49 words
A method of molding an article from a composition comprising an aromatic polycarbonate and a styrenic thermoplastic resin, comprising molding said composition 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 28
Independent Claim
49 words
A method of molding an article from a composition comprising an aromatic polycarbonate and a styrenic thermoplastic resin, comprising molding said composition 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 29
Dependent Claim
57 words
The composition of claim 13 wherein the rubber-modified styrenic thermoplastic resin is a product of a rubber substrate layer, one or more compounds containing a single olefinic double bond and being copolymerizable with said rubber substrate latex, and one or more aromatic compounds containing a single olefinic double bond and being copolymerizable with said rubber substrate latex.
Claim 30
Independent Claim
119 words
A method of measurably increasing (a) the percent elongation at break of a composition comprising an aromatic polycarbonate and a styrenic thermoplastic resin, when measured according to ASTM Designation D 638-84 after having been placed under 0.5% strain while submerged in a bath of 60 wt % isoctane and 40 wt % toluene for 5 minutes and then dried for 24 hours before testing, and (b) the highest energy level at which said composition shows no crack when subjected to impact by a falling dart on a Gardner drop dart instrument, comprising admixing with said composition 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 31
Independent Claim
119 words
A method of measurably increasing (a) the percent elongation at break of a composition comprising an aromatic polycarbonate and a styrenic thermoplastic resin, when measured according to ASTM Designation D 638-84 after having been placed under 0.5% strain while submerged in a bath of 60 wt % isoctane and 40 wt % toluene for 5 minutes and then dried for 24 hours before testing, and (b) the highest energy level at which said composition shows no crack when subjected to impact by a falling dart on a Gardner drop dart instrument, comprising admixing with said composition 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 |