Patent US2171962A successfully refreshed from Google Patents.
US4487872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Repositionable pressure-sensitive adhesive composition
Assignee: Kendall Co
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Filing: 1983-07-07
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Granted: 1984-12-11
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Expires: 2003-07-07
Abstract
Abstract The present invention discloses a novel readily removable and repositionable pressure-sensitive adhesive composition especially suitable for thin adhesive film applications to the surface of paper or other laminar backing materials, for easy application and removal of the laminar backing to a variety of substrate surfaces, which comprises: (1) a carboxyl-modified vinyl chloride-vinyl acetate copolymer; (2) a polymeric polyester plasticizer; and (3) a halo-organophosphorous plasticizer. In the present novel repositionable pressure-sensitive adhesive composition, the desired tack or adhesive bonding strength is selectively controlled by adjusting the relative concentration ratios of the halo-organophosphorous plasticizer and the polyester plasticizer in combination with the vinyl chloride-vinyl acetate copolymer.
Inventors
- 👤 George S. Takemoto
- 👤 Joseph A. Boudreau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:42
CPC Classifications
C; C09; C09J; C09J127/00; C09J127/02; C09J127/04; C09J127/06; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/14; C08L2666/28
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
60 words
A readily removable and repositionable pressure-sensitive adhesive composition in a suitable organic solvent, comprising: (a) a carboxyl modified vinyl acetate-vinyl chloride copolymer, further comprising of from about 86 percent of vinyl chloride, about 13 percent vinyl acetate and about 1 percent of maleic acid; (b) a polymeric polyester plasticizer; and (c) a halo-organophosphorous plasticizer, being a chlorinated oligomeric phosphate ester.
Claim 2
Dependent Claim
60 words
A readily removable and repositionable pressure-sensitive adhesive composition in a suitable organic solvent, comprising: (a) a carboxyl modified vinyl acetate-vinyl chloride copolymer, further comprising of from about 86 percent of vinyl chloride, about 13 percent vinyl acetate and about 1 percent of maleic acid; (b) a polymeric polyester plasticizer; and (c) a halo-organophosphorous plasticizer, being a chlorinated oligomeric phosphate ester.
Claim 3
Dependent Claim
34 words
A pressure-sensitive adhesive composition as described in claim 1, wherein the carboxyl modified vinyl acetate-vinyl chloride copolymer consists essentially of a medium molecular weight resin composition having an average molecular weight of about 21,000.
Claim 4
Dependent Claim
20 words
A pressure-sensitive adhesive composition, as described in claim 1, wherein the polymeric polyester plasticizer comprises an intermediate molecular weight plasticizer.
Claim 5
Dependent Claim
18 words
A pressure-sensitive adhesive composition, as described in claim 1, wherein the halo-organophorous plasticizer comprises a chlorinated organophosphorous plasticizer.
Claim 6
Dependent Claim
31 words
A pressure-sensitive adhesive composition, as described in claim 1, wherein the vinyl acetate-vinyl chloride copolymer is present in a concentration range of from about 15 to about 30 percent by weight.
Claim 7
Dependent Claim
31 words
A pressure-sensitive adhesive composition, as described in claim 1, wherein the vinyl acetate-vinyl chloride copolymer is present in a preferred concentration range from about 18 to about 25 percent by weight.
Claim 8
Dependent Claim
29 words
A pressure-sensitive adhesive composition, as described in claim 1, wherein the polyester plasticizer is present in a concentration range of from about 35 to about 50 percent by weight.
Claim 9
Dependent Claim
30 words
A pressure-sensitive adhesive composition, as described in claim 1, wherein the polyester plasticizer is present in a preferred concentration range of from about 38 to about 45 percent by weight.
Claim 10
Dependent Claim
30 words
A pressure-sensitive adhesive composition, as described in claim 4, wherein the chlorinated organophosphorous plasticizer is present in a concentration range of from about 35 to about 50 percent by weight.
Claim 11
Dependent Claim
30 words
A pressure-sensitive adhesive composition, as described in claim 4, wherein the chlorinated organophosphorous plasticizer is present in a preferred concentration range from about 38 to about 45 percent by weight.
Claim 12
Dependent Claim
44 words
A readily removable and repositionable pressure-sensitive adhesive composition in a suitable organic solvent, essentially comprising: (a) a carboxyl modified vinyl acetate-vinyl chloride copolymer; (b) an intermediate molecular weight polymeric polyester plasticizer having an average molecular weight of about 3,300; (c) a chlorinated organophosphorous plasticizer.
Claim 13
Dependent Claim
44 words
A readily removable and repositionable pressure-sensitive adhesive composition in a suitable organic solvent, essentially comprising: (a) a carboxyl modified vinyl acetate-vinyl chloride copolymer; (b) an intermediate molecular weight polymeric polyester plasticizer having an average molecular weight of about 3,300; (c) a chlorinated organophosphorous plasticizer.
Claim 14
Dependent Claim
31 words
A pressure-sensitive adhesive composition, as described in claim 11, wherein the vinyl acetate-vinyl chloride copolymer is present in a preferred concentration range from about 18 to about 25 percent by weight.
Claim 15
Dependent Claim
29 words
A pressure-sensitive adhesive composition, as described in claim 11, wherein the polyester plasticizer is present in a preferred concentration range from about 38 to about 45 percent by weight.
Claim 16
Dependent Claim
30 words
A pressure-sensitive adhesive composition, as described in claim 11, wherein the chlorinated organophosphorous plasticizer is present in a preferred concentration range from about 38 to about 45 percent by weight.
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) | 1987-12-11 | 1988-06-11 | 1988-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-11 | 1992-06-11 | 1992-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-11 | 1996-06-11 | 1996-12-11 | $7700.00 | Window Closed / Lapsed |