Patent US4981891A successfully refreshed from Google Patents.
US4981891A
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Static dissipative composition
Assignee: Armstrong World Industries Inc
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Filing: 1990-01-22
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Granted: 1991-01-01
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Expires: 2010-01-22
Abstract
Abstract Coating compositions and their preparation are described. The compositions can be used to give surfaces a decreased electrical surface resistivity. Choline antistats are used in amounts of about 2% or less by weight, and are combined with long chain quaternary ammonium salt antistats, in a solution with a binder to give antistatic or stat dissipative coating compositions.
Inventors
- 👤 Richard E. Felter
- 👤 Deborah L. Musser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:09
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/16; C09D; C09D7/00; C09D7/80; Y; Y10; Y10S; Y10S524/00; Y10S524/91; Y10S524/913
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
94 words
An antistat coating composition for giving surfaces a reduced electrical surface resistivity comprises a solvent vehicle in an amount of from about 40 to about 90% by weight; a choline antistat in an amount of about 0.5% to about 2% by weight; a long chain quaternary ammonium salt antistat; and a solvent-compatible binder in an amount of from about 1 to about 60% by weight of the total coating composition, further providing that the concentration ratio of the long chain quaternary ammonium salt antistat to the choline antistat is about 1 to about 2.5.
Claim 2
Dependent Claim
94 words
An antistat coating composition for giving surfaces a reduced electrical surface resistivity comprises a solvent vehicle in an amount of from about 40 to about 90% by weight; a choline antistat in an amount of about 0.5% to about 2% by weight; a long chain quaternary ammonium salt antistat; and a solvent-compatible binder in an amount of from about 1 to about 60% by weight of the total coating composition, further providing that the concentration ratio of the long chain quaternary ammonium salt antistat to the choline antistat is about 1 to about 2.5.
Claim 3
Dependent Claim
23 words
The coating composition of claim 1 that also contains a member selected from the group consisting of an inorganic particulate and a pigment.
Claim 4
Dependent Claim
18 words
The coating composition of claim 1 which also contains fumed silica, ZnO, or Al 2 O 3 .
Claim 5
Dependent Claim
18 words
The coating composition of claim 1 wherein the choline antistat is choline methosulphate, choline hydroxide, or choline chloride.
Claim 6
Dependent Claim
18 words
The coating composition of claim 2 having the inorganic particulate fumed silica and TiO 2 as a pigment.
Claim 7
Dependent Claim
33 words
The coating composition of claim 1 wherein the binder is selected from the group consisting of a polyurethane, a vinyl copolymer, an acetate polymer, an acrylate polymer, an acrylate copolymer, and an epoxy.
Claim 8
Dependent Claim
18 words
The coating composition of claim 6 wherein the binder is either an acrylate polymer or an acrylate copolymer.
Claim 9
Dependent Claim
32 words
The coating composition of claim 1 wherein the long chain quaternary ammonium salt antistat is cocotrimethyl ammonium chloride, ethyl bis(polyethoxy ethanol) alkyl ammonium ethyl sulphate, or fatty acid modified dimethyl-ethyl ammonium ethosulphate.
Claim 10
Dependent Claim
57 words
The coating composition of claim 1 wherein the solvent is present in an amount of from about 70 to 80% by weight; the choline is present in an amount of from about 1 to about 1.5% by weight; and the long chain quat is present in an amount of from about 1.6 to about 2.4% by weight.
Claim 11
Dependent Claim
11 words
The coating composition of claim 1 wherein the binder is dissolved.
Claim 12
Dependent Claim
12 words
The coating composition of claim 10 which is a sprayable coating composition.
Claim 13
Dependent Claim
23 words
The coating composition of claim 1 which also contains a member selected from the group consisting of a thickener, surfactant, and a defoamer.
Claim 14
Dependent Claim
13 words
The coating composition of claim 1 which is packaged as an aerosol spray.
Claim 15
Dependent Claim
60 words
A non-aqueous antistatic coating composition comprises (1) 1-1.5 parts of a choline antistat, (2) 1.6-2.4 parts of one or more long chain quarternary ammonium antistat, (3) 70-90 parts of a solvent vehicle, (4) a polymer binder, and (5) an inorganic particulate, with the parts by weight of (1)-(5) totalling to an amount in the range of from 87.1 to 123.9.
Claim 16
Dependent Claim
60 words
A non-aqueous antistatic coating composition comprises (1) 1-1.5 parts of a choline antistat, (2) 1.6-2.4 parts of one or more long chain quarternary ammonium antistat, (3) 70-90 parts of a solvent vehicle, (4) a polymer binder, and (5) an inorganic particulate, with the parts by weight of (1)-(5) totalling to an amount in the range of from 87.1 to 123.9.
References Cited (Backward Citations)
US4268583A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-12-31 | 1994-07-02 | 1995-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-31 | 1998-07-02 | 1999-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-31 | 2002-07-02 | 2003-01-01 | $7700.00 | Window Closed / Lapsed |