Patent US4440830A successfully refreshed from Google Patents.
US4440830A
Expired / Lapsed
US
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Substrates coated with release composition based on polyvinyl alcohol and composites with pressure sensitive adhesives
Assignee: Individual
•
Filing: 1982-10-28
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Granted: 1984-04-03
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Expires: 2002-10-28
Abstract
Abstract Polyvinyl alcohol based release coating compositions for strippable substrates which are in contact with pressure sensitive adhesives are disclosed. Substrates coated with the release compositions are easily peeled from pressure sensitive adhesive coated substrates without substantially adversely affecting the adhesive character of the adhesive coated substrate. The release coating composition comprises polyvinyl alcohol, a migratable release promoting agent, a water soluble salt of a coordinating metal and a water soluble boron compound in an aqueous solution. In addition to composites comprising release coated substrates affixed to adhesive coated substrates, the release compositions can be applied to the backing of a pressure sensitive adhesive tape to permit facile uncoiling of the rolled tape product.
Inventors
- 👤 Lawrence K. Wempe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:41
CPC Classifications
D; D21; D21H; D21H27/00; D21H27/001; C; C09; C09D; C09D129/00; C09D129/02; C09D129/04; Y; Y10; Y10S; Y10S428/00; Y10S428/906; Y10T; Y10T428/00; Y10T428/14; Y10T428/1438; Y10T428/28; Y10T428/2839; Y10T428/2848; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
146 words
A substrate coated with a release coating composition consisting essentially of: (a) a polyvinyl alcohol, (b) a migratable release promoting agent which is a surfactant that in a 10% aqueous polyvinyl alcohol solution at 5 wt.% based on the polyvinyl alcohol provides a dried film on a glass plate having a release value of less than about 0.91 pounds per inch determined by applying a 0.004 inch coating of the surfactant modified polyvinyl alcohol solution to the glass plate, heating the coated glass plate for about 10 minutes at 120° to 125° C. to yield a dried film, applying a strip of masking tape to the film by rolling once with a 4.3 pound roller and pulling an edge of the tape away from the film at a 180° angle, (c) a water soluble salt of a coordinating metal, and (d) a water soluble boron compound.
Claim 2
Dependent Claim
146 words
A substrate coated with a release coating composition consisting essentially of: (a) a polyvinyl alcohol, (b) a migratable release promoting agent which is a surfactant that in a 10% aqueous polyvinyl alcohol solution at 5 wt.% based on the polyvinyl alcohol provides a dried film on a glass plate having a release value of less than about 0.91 pounds per inch determined by applying a 0.004 inch coating of the surfactant modified polyvinyl alcohol solution to the glass plate, heating the coated glass plate for about 10 minutes at 120° to 125° C. to yield a dried film, applying a strip of masking tape to the film by rolling once with a 4.3 pound roller and pulling an edge of the tape away from the film at a 180° angle, (c) a water soluble salt of a coordinating metal, and (d) a water soluble boron compound.
Claim 3
Dependent Claim
32 words
The release coated substrate of claim 1 which is a strip of substrate having the release coating composition on one side and includes a pressure sensitive adhesive coating on the other side.
Claim 4
Dependent Claim
13 words
The release coated strip of claim 2 which is a roll of tape.
Claim 5
Dependent Claim
37 words
A composite comprising a pressure sensitive adhesive coated substrate in contact with the release coated substrate of claim 1 such that the adhesive coated surface and the release coated surface of the respective substrates contact one another.
Claim 6
Dependent Claim
15 words
The product of claims 1 in which the coordinating metal is a chelating transition metal.
Claim 7
Dependent Claim
22 words
The product of claim 5 in which the chelating transition metal is selected from the group consisting of zinc, copper and titanium.
Claim 8
Dependent Claim
13 words
The product of claim 6 in which the chelating transition metal is zinc.
Claim 9
Dependent Claim
15 words
The product of claim 7 in which the water soluble boron compound is boric acid.
Claim 10
Dependent Claim
30 words
The product of claims 1 in which the water soluble boron compound is selected from the group consisting of boric acid, sodium metaborate, sodium tetraborate, borax and disodium octaborate tetrahydrate.
Claim 11
Dependent Claim
15 words
The product of claim 9 in which the water soluble boron compound is boric acid.
Claim 12
Dependent Claim
57 words
A release coated substrate comprising a strip of substrate having on one side a release coating composition consisting essentially of (a) a polyvinyl alcohol, (b) a migratable release promoting agent, (c) a water soluble salt of a chelating transition metal, and (d) a water soluble boron compound; and on the opposite side a pressure sensitive adhesive coating.
Claim 13
Dependent Claim
57 words
A release coated substrate comprising a strip of substrate having on one side a release coating composition consisting essentially of (a) a polyvinyl alcohol, (b) a migratable release promoting agent, (c) a water soluble salt of a chelating transition metal, and (d) a water soluble boron compound; and on the opposite side a pressure sensitive adhesive coating.
Claim 14
Dependent Claim
32 words
The release coated substrate of claim 11 in which the water soluble boron compound is selected from the group consisting of boric acid, sodium metaborate, sodium tetraborate, borax and disodium octaborate tetrahydrate.
Claim 15
Dependent Claim
15 words
The release coated substrate of claim 11 in which the chelating transition metal is zinc.
Claim 16
Dependent Claim
15 words
The release coated substrate of claim 11 in which the boron compound is boric acid.
Claim 17
Dependent Claim
122 words
The release coated substrate of claim 11 in which the migratable release promoting agent is a surfactant that in a 10% aqueous polyvinyl alcohol solution at 5 wt.% based on the polyvinyl alcohol provides a dried film on a glass plate having a release value of less then about 0.91 pounds per inch determined by applying a 0.004 inch coating of the surfactant modified polyvinyl alcohol solution to the glass plate, heating the coated glass plate for about 10 minutes at 120° to 125° C. to yield a dried film, applying a strip of masking tape to the film by rolling once with a 4.3 pound roller and pulling an edge of the tape away from the film at a 180° angle.
Claim 18
Dependent Claim
32 words
The release coated substrate of claim 15 in which the water soluble boron compound is selected from the group consisting of boric acid, sodium metaborate, sodium tetraborate, borax and disodium octaborate tetrahydrate.
Claim 19
Dependent Claim
83 words
A composite comprising a pressure sensitive adhesive coated substrate and a release coated substrate having one side coated with a release coating composition consisting essentially of (a) a polyvinyl alcohol, (b) a migratable release promoting agent, (c) a water soluble salt of a chelating transition metal, and (d) a water soluble boron compound, the pressure sensitive adhesive coated substrate and the release coated substrate contacting each other such that the adhesive coated surface is against the release coated surface of the respective substrates.
Claim 20
Dependent Claim
83 words
A composite comprising a pressure sensitive adhesive coated substrate and a release coated substrate having one side coated with a release coating composition consisting essentially of (a) a polyvinyl alcohol, (b) a migratable release promoting agent, (c) a water soluble salt of a chelating transition metal, and (d) a water soluble boron compound, the pressure sensitive adhesive coated substrate and the release coated substrate contacting each other such that the adhesive coated surface is against the release coated surface of the respective substrates.
Claim 21
Dependent Claim
30 words
The composite of claim 17 in which the water soluble boron compound is selected from the group consisting of boric acid, sodium metaborate, sodium tetraborate, borax and disodium octaborate tetrahydrate.
Claim 22
Dependent Claim
12 words
The composite of claim 17 in which the chelating metal is zinc.
Claim 23
Dependent Claim
13 words
The composite of claim 17 in which the boron compound is boric acid.
Claim 24
Dependent Claim
120 words
The composite of claim 17 in which the migratable release promoting agent is a surfactant that in a 10% aqueous polyvinyl alcohol solution at 5 wt.% based on the polyvinyl alcohol provides a dried film on a glass plate having a release value of less then about 0.91 pounds per inch determined by applying a 0.004 inch coating of the surfactant modified polyvinyl alcohol solution to the glass plate, heating the coated glass plate for about 10 minutes at 120° to 125° C. to yield a dried film, applying a strip of masking tape to the film by rolling once with a 4.3 pound roller and pulling an edge of the tape away from the film at a 180° angle.
Claim 25
Dependent Claim
30 words
The composite of claim 21 in which the water soluble boron compound is selected from the group consisting of boric acid, sodium metaborate, sodium tetraborate, borax and disodium octaborate tetrahydrate.
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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) | 1987-04-03 | 1987-10-03 | 1988-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-03 | 1991-10-03 | 1992-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-03 | 1995-10-03 | 1996-04-03 | $7700.00 | Window Closed / Lapsed |