US4145327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-sensitive antistatic adhesive and process for the preparation thereof using an aqueous latex copolymer and a quaternary ammonium salt
Assignee: Occidental Chemical Corp
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Filing: 1978-01-05
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Granted: 1979-03-20
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Expires: 1998-01-05
Abstract
Abstract Disclosed is a novel antistatic pressure-sensitive adhesive composition essentially comprising an aqueous latex copolymer of a vinyl ester and an alkyl acrylate to which an adhesive-compatible ammonium salt has been added. An antistatic pressure-sensitive adhesive is prepared by dispersing, as an antistatic promoter, a compatible ammonium salt, such as a quaternary ammonium salt, directly with the latex copolymer. By coating one side of a suitable release paper with the antistatic pressure-sensitive adhesive thus prepared and thereafter laminating the adhesive side of the coated release paper to a film material, the tendency for such materials to accumulate electrostatic charges upon the removal of the release paper is greatly reduced.
Inventors
- 👤 Ronald G. Dolch
- 👤 Robert N. Kerr, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:13
CPC Classifications
C; C09; C09J; C09J131/00; C09J131/02; C09J131/04; C09J133/00; C09J133/04; C09J133/06; C09J133/08; C09J7/00; C09J7/30; C09J7/38; C09J7/381; C08; C08L; C08L2666/00; C08L2666/28; C09J2301/00; C09J2301/30; C09J2301/302; Y; Y10; Y10S; Y10S260/00; Y10S260/15; Y10S260/19; Y10S260/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
110 words
A novel pressure-sensitive adhesive composition having improved antistatic properties comprising: an aqueous latex copolymer having from about 30 to about 60 parts by weight of vinyl acetate per 100 parts of said latex copolymer; and, from about 40 to about 70 parts by weight of an acrylate selected from the group consisting of 2-ethylhexyl acrylate and butyl acrylate per 100 parts of said latex copolymer; from about 0.5 to about 5.0 parts by weight of an adhesive-compatible quaternary ammonium salt, per 100 parts of said latex copolymer, incorporated therein; and, from about 2 to about 4 parts by weight of a nonionic emulsifier per 100 parts of said latex copolymer.
Claim 2
Dependent Claim
110 words
A novel pressure-sensitive adhesive composition having improved antistatic properties comprising: an aqueous latex copolymer having from about 30 to about 60 parts by weight of vinyl acetate per 100 parts of said latex copolymer; and, from about 40 to about 70 parts by weight of an acrylate selected from the group consisting of 2-ethylhexyl acrylate and butyl acrylate per 100 parts of said latex copolymer; from about 0.5 to about 5.0 parts by weight of an adhesive-compatible quaternary ammonium salt, per 100 parts of said latex copolymer, incorporated therein; and, from about 2 to about 4 parts by weight of a nonionic emulsifier per 100 parts of said latex copolymer.
Claim 3
Dependent Claim
20 words
A novel pressure-sensitive adhesive composition as set forth in claim 1, wherein said nonionic emulsifier is an alkylaryl polyoxyethylene compound.
Claim 4
Dependent Claim
35 words
A novel pressure-sensitive adhesive composition as set forth in claim 1, wherein said quaternary ammonium salt is stearamidopropyldimethyl-β-hydroxyethylammonium nitrate and is present in an amount of 2.5 parts per 100 parts of said latex copolymer.
Claim 5
Dependent Claim
85 words
A process for the preparation of an antistatic pressure-sensitive adhesive comprising the step of: dispersing an adhesive-compatible quaternary ammonium salt; a nonionic emulsifier; and, an aqueous latex adhesive comprising from about 30 to about 60 parts by weight of vinyl acetate per 100 parts of said latex copolymer; and, from about 40 to about 70 parts by weight of an acrylate selected from the group consisting of 2-ethylhexyl acrylate and butyl acrylate per 100 parts of said latex copolymer to form the antistatic pressure-sensitive adhesive.
Claim 6
Dependent Claim
85 words
A process for the preparation of an antistatic pressure-sensitive adhesive comprising the step of: dispersing an adhesive-compatible quaternary ammonium salt; a nonionic emulsifier; and, an aqueous latex adhesive comprising from about 30 to about 60 parts by weight of vinyl acetate per 100 parts of said latex copolymer; and, from about 40 to about 70 parts by weight of an acrylate selected from the group consisting of 2-ethylhexyl acrylate and butyl acrylate per 100 parts of said latex copolymer to form the antistatic pressure-sensitive adhesive.
Claim 7
Dependent Claim
25 words
A process for the preparation of an antistatic pressure-sensitive adhesive as set forth in claim 4, wherein said nonionic emulsifier is an alkylaryl polyoxyethylene compound.
Claim 8
Dependent Claim
40 words
A process for the preparation of an antistatic pressure-sensitive adhesive, as set forth in claim 4, wherein said quaternary ammonium salt is stearamidopropyldimethyl-β-hydroxyethylammonium nitrate and is present in an amount of 5 parts per 100 parts of said latex copolymer.
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) | 1982-03-19 | 1982-09-18 | 1983-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-19 | 1986-09-18 | 1987-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-19 | 1990-09-18 | 1991-03-20 | $7700.00 | Window Closed / Lapsed |