US4324595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for removing tacky adhesives and articles adhered therewith
Assignee: Dow Silicones Corp
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Filing: 1979-08-31
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Granted: 1982-04-13
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Expires: 1999-08-31
Abstract
Abstract Tacky adhesives are removed from a substrate by a non-stinging, non-drying, non-staining, non-solvent process. The process uses a volatile methylsiloxane fluid to detackify the adhered adhesive, after which it is easily removed. This process is particularly useful for removing tacky adhesives from the human skin. A highly preferred volatile methylpolysiloxane fluid is octamethylcyclotetrasiloxane.
Inventors
- 👤 Kenneth A. Kasprzak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:00
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/50; C11D7/5004; C11D7/5009; A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/58; A61K8/585; A61Q; A61Q19/00; A61Q19/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
94 words
A process for removing a pressure-sensitive adhesive from a substrate, said adhesive having tack, as measured by ASTM D2979-71, said process comprising applying a composition consisting essentially of a volatile methylsiloxane fluid to said adhesive and removing the thus-treated adhesive from said substrate, said volatile methylsiloxane fluid being sufficiently volatile to leave substantially no residue after 30 minutes at room temperature when 1 gram thereof is placed at the center of a No. 1 circular filter paper having a diameter of 185 mm. and being supported by its perimeter in an open room atmosphere.
Claim 2
Dependent Claim
94 words
A process for removing a pressure-sensitive adhesive from a substrate, said adhesive having tack, as measured by ASTM D2979-71, said process comprising applying a composition consisting essentially of a volatile methylsiloxane fluid to said adhesive and removing the thus-treated adhesive from said substrate, said volatile methylsiloxane fluid being sufficiently volatile to leave substantially no residue after 30 minutes at room temperature when 1 gram thereof is placed at the center of a No. 1 circular filter paper having a diameter of 185 mm. and being supported by its perimeter in an open room atmosphere.
Claim 3
Dependent Claim
99 words
A process for removing an article from a substrate, adhered thereto with a pressure-sensitive adhesive having tack, as measured by ASTM D2979-71, said process comprising applying a composition consisting essentially of a volatile methylsiloxane fluid to said adhesive and removing said article and its adhesive from said substrate, said volatile methylsiloxane fluid being sufficiently volatile to leave substantially no residue after 30 minutes at room temperature when 1 gram thereof is placed at the center of a No. 1 circular filter paper having a diameter of 185 mm. and being supported by its perimeter in an open room atmosphere.
Claim 4
Dependent Claim
99 words
A process for removing an article from a substrate, adhered thereto with a pressure-sensitive adhesive having tack, as measured by ASTM D2979-71, said process comprising applying a composition consisting essentially of a volatile methylsiloxane fluid to said adhesive and removing said article and its adhesive from said substrate, said volatile methylsiloxane fluid being sufficiently volatile to leave substantially no residue after 30 minutes at room temperature when 1 gram thereof is placed at the center of a No. 1 circular filter paper having a diameter of 185 mm. and being supported by its perimeter in an open room atmosphere.
Claim 5
Dependent Claim
15 words
A process according to claims 1 or 2 wherein the substrate comprises the human skin.
Claim 6
Dependent Claim
19 words
A process according to claims 1 or 2 wherein the volatile methylsiloxane fluid comprises a major amount of 2,2,4,4,6,6,8,8-octamethylcyclotetrasiloxane.
Claim 7
Dependent Claim
17 words
A process according to claim 3 wherein the volatile methylsiloxane fluid comprises a major amount of 2,2,4,4,6,6,8,8-octamethylcyclotetrasiloxane.
References Cited (Backward Citations)
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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) | 1985-04-12 | 1985-10-12 | 1986-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-12 | 1989-10-12 | 1990-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-12 | 1993-10-12 | 1994-04-13 | $7700.00 | Window Closed / Lapsed |