US4619968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame resistant carbonate blends
Assignee: Dow Chemical Co
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Filing: 1985-08-12
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Granted: 1986-10-28
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Expires: 2005-08-12
Abstract
Abstract Carbonate polymer blend compositions which exhibit flame resistant properties comprising a carbonate polymer and grafted rubber compound in which at least a portion of the grafted on the rubber backbone is a flame resistant polymer.
Inventors
- 👤 David E. Henton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:39
CPC Classifications
C; C08; C08L; C08L69/00; C08L69/005; Y; Y10; Y10S; Y10S260/00; Y10S260/24
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
58 words
A composition comprising: (1) a continuous phase comprising an aromatic carbonate polymer and (2) having dispersed therein an elastomeric particle material in the form of a grafted rubber concentrate which comprises (a) a functionally effective amount of crosslinking (b) which is further grafted with a functionally effective amount of a vinyl polymer capable of exhibiting flame resistant properties.
Claim 2
Dependent Claim
58 words
A composition comprising: (1) a continuous phase comprising an aromatic carbonate polymer and (2) having dispersed therein an elastomeric particle material in the form of a grafted rubber concentrate which comprises (a) a functionally effective amount of crosslinking (b) which is further grafted with a functionally effective amount of a vinyl polymer capable of exhibiting flame resistant properties.
Claim 3
Dependent Claim
12 words
A composition of claim 1 wherein said aromatic carbonate is bisphenol A.
Claim 4
Dependent Claim
16 words
A composition of claim 1 wherein said aromatic carbonate polymer is a derivative of bisphenol A.
Claim 5
Dependent Claim
16 words
A composition of claim 1 wherein said aromatic carbonate polymer is a copolycarbonate of bisphenol A.
Claim 6
Dependent Claim
23 words
A composition of claim 1 wherein said elastomeric particle material comprises the polymerized product of aliphatic conjugated dienes, acrylate homopolymers, or interpolymers thereof.
Claim 7
Dependent Claim
22 words
A composition of claim 5 wherein said elastomeric particle ranges in size from about 300 Å to about 20,000 Å in diameter.
Claim 8
Dependent Claim
26 words
A composition of claim 5 wherein said elastomeric component of the particles ranges from about 15 to about 90 weight percent of the grafted rubber concentrate.
Claim 9
Dependent Claim
26 words
A composition of claim 6 wherein said elastomeric component of the particles ranges from about 25 to about 80 weight percent of the grafted rubber concentrates.
Claim 10
Dependent Claim
22 words
A composition of claim 1 wherein said vinyl polymer capable of exhibiting flame resistant properties comprises polymerized styrenics, acrylates, methacrylates, or acrylonitrile.
Claim 11
Dependent Claim
38 words
A composition of claim 9 wherein the vinyl polymer capable of exhibiting flame resistant properties is formed from a monomer mixture comprising a halogenated monomer selected from the group consisting of bromostyrene, dibromostyrene, tribromostyrene, chlorostyrene, dichlorostyrene and trichlorostyrene.
Claim 12
Dependent Claim
30 words
A composition of claim 10 wherein the amount of said halogenated monomer ranges from about 10 to about 100 weight percent based on the monomers polymerized during the graft polymerization.
Claim 13
Dependent Claim
33 words
A composition of claim 1 wherein the amount of grafted rubber concentrate ranges from about 0.5 to about 50 weight percent based on the weight of aromatic carbonate polymer plus grafted rubber concentrate.
Claim 14
Dependent Claim
33 words
A composition of claim 1 wherein the amount of grafted rubber concentrate ranges from about 2 to about 20 weight percent based on the weight of aromatic carbonate polymer plus grafted rubber concentrate.
References Cited (Backward Citations)
US4180494A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-10-27 | 1990-04-28 | 1990-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-27 | 1994-04-28 | 1994-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-27 | 1998-04-28 | 1998-10-28 | $7700.00 | Window Closed / Lapsed |