Patent US5219936A successfully refreshed from Google Patents.
US5219936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High impact PVC/polycarbonate alloy compositions
Assignee: Great Lakes Chemical Corp
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Filing: 1992-01-07
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Granted: 1993-06-15
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Expires: 2012-01-07
Abstract
Abstract A preferred rigid thermoplastic resin composition having high impact strength and resistance to thermal distortion includes a vinyl chloride resin/polycarbonate alloy and at least 3 parts by weight of butadiene-modified acrylic per 100 parts by weight of the alloy. A particularly preferred thermoplastic resin composition includes the alloy and both butadiene-modified acrylic and ethylene-vinyl acetate copolymer.
Inventors
- 👤 David J. Honkomp
- 👤 Nicolai A. Favstritsky
- 👤 Enrico J. Termine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:39
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L69/00; C08L31/00; C08L31/02; C08L31/04; C08L33/00; C08L33/04; C08L33/06
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
63 words
A rigid thermoplastic resin composition having high impact strength and resistance to thermal distortion, comprising a polyvinyl chloride resin/aromatic polycarbonate alloy, at least 3 parts by weight of an ethylene-vinyl acetate copolymer impact modifier per 100 parts by weight of said alloy, and at least 3 parts by weight of a butadiene-modified acrylic impact modifier per 100 parts by weight of said alloy.
Claim 2
Dependent Claim
63 words
A rigid thermoplastic resin composition having high impact strength and resistance to thermal distortion, comprising a polyvinyl chloride resin/aromatic polycarbonate alloy, at least 3 parts by weight of an ethylene-vinyl acetate copolymer impact modifier per 100 parts by weight of said alloy, and at least 3 parts by weight of a butadiene-modified acrylic impact modifier per 100 parts by weight of said alloy.
Claim 3
Dependent Claim
17 words
The composition of claim 1 which exhibits a Gardner impact strength of at least about 2 in.-lb./mil.
Claim 4
Dependent Claim
33 words
The composition of claim 1 wherein the butadiene-modified acrylic and the ethylene-vinyl acetate copolymer are each included in about 3 to 30 parts by weight per 100 parts by weight of said alloy.
Claim 5
Dependent Claim
17 words
The composition of claim 3 which exhibits a Gardner impact strength of at least about 2 in.-lb./mil.
Claim 6
Dependent Claim
16 words
The composition of claim 3 which exhibits at least 50% ductility in the Gardner impact test.
Claim 7
Dependent Claim
16 words
The composition of claim 4 which exhibits at least 50% ductility in the Gardner impact test.
Claim 8
Dependent Claim
14 words
The composition of claim 6 wherein the polycarbonate is derived from a tetrahalobisphenol A.
Claim 9
Dependent Claim
12 words
The composition of claim 6 wherein the tetrahalobisphenol A is tetrabromobisphenol A.
Claim 10
Dependent Claim
14 words
The composition of claim 8 wherein the polycarbonate is a tribromophenyl-terminated tetrabromobisphenol A polycarbonate.
Claim 11
Dependent Claim
42 words
A rigid thermoplastic resin composition having high impact strength, ductility and resistance to thermal distortion, comprising a polyvinyl chloride resin/aromatic polycarbonate alloy and effective amounts of butadiene-modified acrylic and ethylene-vinyl acetate copolymer to increase the impact strength and ductility of said alloy.
Claim 12
Dependent Claim
42 words
A rigid thermoplastic resin composition having high impact strength, ductility and resistance to thermal distortion, comprising a polyvinyl chloride resin/aromatic polycarbonate alloy and effective amounts of butadiene-modified acrylic and ethylene-vinyl acetate copolymer to increase the impact strength and ductility of said alloy.
Claim 13
Dependent Claim
28 words
The composition of claim 10 which exhibits an impact strength of at least about 2 in.-lb/mil. and a ductility of at least 50% in the Gardner impact test.
Claim 14
Dependent Claim
15 words
The composition of claim 11 wherein the polycarbonate is derived from a bisphenol A derivative.
Claim 15
Dependent Claim
14 words
The composition of claim 12 wherein the bisphenol A derivative is a tetrahalobisphenol A.
Claim 16
Dependent Claim
12 words
The composition of claim 1 wherein the tetrahalobisphenol A is tetrabromobisphenol A.
Claim 17
Dependent Claim
14 words
The composition of claim 14 wherein the polycarbonate is a tribromophenyl-terminated tetrabromobisphenol A polycarbonate.
Claim 18
Independent Claim
56 words
A method for preparing a rigid thermoplastic resin composition having high impact strength and resistance to thermal distortion, comprising incorporating into a polyvinyl chloride resin/polycarbonate alloy effective amounts of a butadiene-modified acrylic impact modifier and an ethylene-vinyl acetate copolymer impact modifier to increase the impact strength and ductility of the alloy in the Gardner impact test.
Claim 19
Independent Claim
56 words
A method for preparing a rigid thermoplastic resin composition having high impact strength and resistance to thermal distortion, comprising incorporating into a polyvinyl chloride resin/polycarbonate alloy effective amounts of a butadiene-modified acrylic impact modifier and an ethylene-vinyl acetate copolymer impact modifier to increase the impact strength and ductility of the alloy in the Gardner impact test.
Claim 20
Dependent Claim
56 words
The method of claim 16 which includes the step of incorporating an effective amount of the butadiene-modified acrylic impact modifier and ethylene-vinyl acetate copolymer impact modifier so that the composition exhibits an impact strength of at least about 2 in.-lb./mil. in the Gardner impact test and at least about 50% ductility in the Gardner impact test.
Claim 21
Dependent Claim
16 words
The method of claim 17 in which the polycarbonate is derived form a bisphenol A derivative.
Claim 22
Dependent Claim
14 words
The method of claim 17 in which the polycarbonate is derived form tetrabromobisphenol A.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-06-14 | 1996-12-14 | 1997-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-14 | 2000-12-14 | 2001-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-14 | 2004-12-14 | 2005-06-15 | $7700.00 | Window Closed / Lapsed |