Patent US4708907A successfully refreshed from Google Patents.
US4708907A
Expired / Lapsed
US
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Writable adhesive tape
Assignee: Boston SpA
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Filing: 1985-04-26
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Granted: 1987-11-24
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Expires: 2005-04-26
Abstract
Abstract A writable adhesive tape is disclosed, which comprises a polyolefine substrate, having on one side an adhesive layer and on the opposite side a writable anti-adhesive layer. The writable anti-adhesive layer comprises 25% to 55% by weight of a chlorinated polyolefine, 20% to 50% by weight of a polyaldehyde resin together with 5% to 20% by weight of an anti-adhesive agent, and 5% to 25% by weight of a matting charge.
Inventors
- 👤 Fulvio Flutti
- 👤 Franco Ghezzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:50
CPC Classifications
B; B05; B05D; B05D5/00; B05D5/04; C; C09; C09D; C09D123/00; C09D123/26; C09D123/28; C09D161/00; C09D161/20; C09D161/22; C09D161/24; C09J; C09J7/00; C09J7/20; C09J7/201; C09J7/22; C09J2301/00; C09J2301/40; C09J2301/414; C09J2421/00; C09J2421/005; C09J2423/00; C09J2423/006; C09J2423/10; C09J2423/106; C09J2427/00; C09J2427/005; C09J2429/00; C09J2429/005; C09J2431/00; C09J2431/005; C09J2461/00; C09J2461/005; C09J2475/00; C09J2475/005; C09J2483/00; C09J2483/005; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/28; Y10T428/2839; Y10T428/2848; Y10T428/2852; Y10T428/2874; Y10T428/31504; Y10T428/31551; Y10T428/31573; Y10T428/31587; Y10T428/31786; Y10T428/31797; Y10T428/31826; Y10T428/31833; Y10T428/31837
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
115 words
A self-sticking tape, comprising a flexible substrate, a self-sticking coating on one side thereof, and an antiadhesive writable coating on the opposite side, comprising at least one film forming resin along with at least one anti-adhesive agent and at least one matting agent, wherein said substrate is selected from oriented and non-oriented films of alpha-olefine polymers and copolymers, having at least the side bearing said anti-adhesive coating free from any additional priming layer and adhesion promoting surface treatment, and said anti-adhesive writable coating comprises 25% to 55% by weight of at least one chlorinated polyolefine and 20% to 50% by weight of a polyaldehyde resin as said film-forming resin and as substrate adhesive promoter resin.
Claim 2
Dependent Claim
115 words
A self-sticking tape, comprising a flexible substrate, a self-sticking coating on one side thereof, and an antiadhesive writable coating on the opposite side, comprising at least one film forming resin along with at least one anti-adhesive agent and at least one matting agent, wherein said substrate is selected from oriented and non-oriented films of alpha-olefine polymers and copolymers, having at least the side bearing said anti-adhesive coating free from any additional priming layer and adhesion promoting surface treatment, and said anti-adhesive writable coating comprises 25% to 55% by weight of at least one chlorinated polyolefine and 20% to 50% by weight of a polyaldehyde resin as said film-forming resin and as substrate adhesive promoter resin.
Claim 3
Dependent Claim
38 words
A self-sticking tape, according to claim 1, wherein said anti-adhesive writable coating comprises 5% to 20% by weight of said at least one anti-adhesive agent and 5% to 25% by weight of said at least one matting agent.
Claim 4
Dependent Claim
13 words
A tape according to claim 1, wherein said substate is a polypropylene substrate.
Claim 5
Dependent Claim
43 words
A self-sticking tape, according to claim 1, wherein said anti-adhesive writable coating comprises 35% to 40% by weight of said chlorinated polyolefine, 30% to 40% of said polyaldehyde, 10% to 15% of said anti-adhesive agent, and 10% to 15% of said matting agent.
Claim 6
Dependent Claim
25 words
A tape according to claim 1, wherein said chlorinated polyolefine is a homopolymer or copolymer film-forming polyolefine having a chlorine content of 15% to 65%.
Claim 7
Dependent Claim
39 words
A tape according to claim 1 wherein said said polyaldehyde resin is a film-forming resin obtained by the condensation of a linear or branched chain aliphatic aldehyde with 4 to 8 carbon atoms in the aliphatic chain with urea.
Claim 8
Dependent Claim
24 words
A tape according to claim 1, wherein said anti-adhesive agent is selected from polyvinylalkylcarbamates, alkylurethanes of polyvinylalcohols, and amides of fatty acids and polyethyleneimine.
Claim 9
Dependent Claim
12 words
A tape according to claim 1, wherein said matting agent comprises silica.
Claim 10
Dependent Claim
17 words
A tape according to claim 1, wherein said anti-adhesive writable coating further comprises a linear elastomeric polyurethane.
Claim 11
Dependent Claim
49 words
A tape according to claim 9, wherein said anti-adhesive writable coating comprises 25% to 50% by weight of said chlorinated polyolefine, 15% to 30% by weight of said polyaldehyde resin, and 5% to 20% by weight of said linear elastomeric polyurethane as the film-forming and substrate adhesive promoters resin.
Claim 12
Dependent Claim
58 words
A tape according to claim 10, wherein said anti-adhesive writable coating comprises 35% to 40% by weight of said chlorinated polyolefine, 20% to 25% by weight of said polyaldehyde, 10% to 15% by weight of said linear elastomeric polyurethane, 10% to 15% by weight of said anti-adhesive agent, and 10% to 15% by weight of said matting agent.
Claim 13
Dependent Claim
48 words
A tape according to any of claims 9 to 11, wherein said linear elastomeric polyurethane is the reaction product of a hydroxy-terminated polyester of a dicarboxylic acid of 4 to 10 carbon atoms and a diol of 4 to 10 carbon atoms with an aliphatic or aromatic di-isocyanate.
Claim 14
Dependent Claim
44 words
A tape according to claim 10, wherein said linear elastomeric polyurethane is the reaction product of a hydroxy-terminated polyester of a dicarboxylic acid having 4 to 10 carbon atoms and a diol having 4 to 10 carbon atoms with an aliphatic or aromatic di-isocyanate.
Claim 15
Dependent Claim
13 words
A tape according to claim 9, wherein said substrate is a polypropylene substrate.
Claim 16
Dependent Claim
28 words
A tape according to either claim 9 or 10, wherein said chlorinated polyolefine is a homopolymer or copolymer film-forming polyolefine having a chlorine content of 15% to 65%.
Claim 17
Dependent Claim
33 words
A tape according to claim 10, wherein said polyaldehyde resin is a film-forming resin obtained by condensation of a linear or branched chain aliphatic aldehyde of 4 to 8 carbon atoms with urea.
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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) | 1990-11-23 | 1991-05-25 | 1991-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-23 | 1995-05-25 | 1995-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-23 | 1999-05-25 | 1999-11-24 | $7700.00 | Window Closed / Lapsed |