US4592861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antistatic thermoplastic composition comprising a graft polymer, halogenated thermoplastic polymer and conductive carbon black
Assignee: UNIROYAL TECHNOLOGY Corp A CORP OF DELAWARE
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Filing: 1984-06-08
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Granted: 1986-06-03
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Expires: 2004-06-08
Abstract
Abstract An antistatic thermoplastic composition comprising a blend of a thermoplastic graft polymer; a thermoplastic halogenated polymer; and an amount of conductive carbon black effective to cause the composition to have a surface resistivity of 102-1012 ohm/square, wherein the ratio of (a)/(b) is from 9:1-1:9, by weight and the weight percentage of (c) is from 2-10%.
Inventors
- 👤 Solomon Bekele
- 👤 Victor W. Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:36
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08K; C08K3/00; C08K3/02; C08K3/04; C08L51/00; C08L51/04; C08L51/06; C08L2205/00; C08L2205/02; C08L23/00; C08L23/26; C08L23/28; C08L23/286; C08L55/00; C08L55/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
61 words
An antistatic thermoplastic composition comprising a blend of (a) a thermoplastic graft polymer; (b) a thermoplastic halogenated polymer; and (c) an amount of conductive carbon black effective to cause the composition to have a surface resistivity of 10 2 -10 12 ohm/square, wherein the ratio of (a)/(b) is from 9:1-1:9, by weight and the weight percentage of (c) is from 2-10%.
Claim 2
Dependent Claim
61 words
An antistatic thermoplastic composition comprising a blend of (a) a thermoplastic graft polymer; (b) a thermoplastic halogenated polymer; and (c) an amount of conductive carbon black effective to cause the composition to have a surface resistivity of 10 2 -10 12 ohm/square, wherein the ratio of (a)/(b) is from 9:1-1:9, by weight and the weight percentage of (c) is from 2-10%.
Claim 3
Dependent Claim
22 words
The composition of claim 1 wherein said graft polymer (a) is based on a diene rubber spine or an ethylene-propylene-nonconjugated diene spine.
Claim 4
Dependent Claim
16 words
The composition of claim 1 wherein said halogenated polymer (b) is a thermoplastic containing chlorine atoms.
Claim 5
Dependent Claim
17 words
The composition of claim 2 wherein (a) is a diene rubber grafted with styrene and acrylonitrile monomer.
Claim 6
Dependent Claim
10 words
The composition of claim 3 wherein (b) is poly(vinyl chloride).
Claim 7
Dependent Claim
21 words
The composition of claim 1 wherein said conductive carbon black (c) has a BET surface area of 500-1500 m 2 /g.
Claim 8
Dependent Claim
33 words
The composition of claim 1, wherein the ratio of (a)/(b) is from 1.5:1-2.3:1 and the percentage weight of (c) is from 5-7.5%, and the surface resistivity is from 10 5 -10 8 .
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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) | 1989-06-02 | 1989-12-02 | 1990-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-02 | 1993-12-02 | 1994-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-02 | 1997-12-02 | 1998-06-03 | $7700.00 | Window Closed / Lapsed |