US4192783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vegetable based, remoistenable adhesive for pregummed tape
Assignee: Primary Products Ingredients Americas LLC
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Filing: 1978-05-26
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Granted: 1980-03-11
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Expires: 1998-05-26
Abstract
Abstract Remoistenableadhesive compositions for use on pregummed substrates comprising, in aqueous medium, a low viscosity starch-acrylamide graft copolymer.
Inventors
- 👤 William A. Bomball
- 👤 Thomas G. Swift
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:50
CPC Classifications
C; C09; C09J; C09J103/00; C09J103/14; C09J151/00; C09J151/02; C09J189/00; C09J189/005; C09J7/00; C09J7/20; C09J7/21; C09J7/30; C09J7/32; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/28
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
82 words
A remoistenable adhesive composition suitable for use on pregummed substrates consisting essentially of a low viscosity starch-acrylamide graft copolymer, the starch of said copolymer being selected from the group consisting of waxy maize, waxy milo, tapioca and potato starches and having a cooked fluidity of 43-53 ml.; animal glue; and sufficient water to provide a solids content of 30-60%, and in which the weight ratio of said copolymer to animal glue is in the range of 9:1 to 1:9 dry substance basis.
Claim 2
Dependent Claim
82 words
A remoistenable adhesive composition suitable for use on pregummed substrates consisting essentially of a low viscosity starch-acrylamide graft copolymer, the starch of said copolymer being selected from the group consisting of waxy maize, waxy milo, tapioca and potato starches and having a cooked fluidity of 43-53 ml.; animal glue; and sufficient water to provide a solids content of 30-60%, and in which the weight ratio of said copolymer to animal glue is in the range of 9:1 to 1:9 dry substance basis.
Claim 3
Dependent Claim
81 words
A remoistenable adhesive composition suitable for use on pregummed substrates consisting essentially of a low viscosity starch-acrylamide graft copolymer, the starch of said copolymer being selected from the group consisting of waxy maize, waxy milo, tapioca and potato starches, and having a cooked fluidity of 43-53 ml.; polyvinyl alcohol in a weight ratio of about 60:1 of graft copolymer to polyvinyl alcohol; and water in an amount sufficient to provide a liquid adhesive composition prior to drying of about 45-55% solids.
Claim 4
Dependent Claim
81 words
A remoistenable adhesive composition suitable for use on pregummed substrates consisting essentially of a low viscosity starch-acrylamide graft copolymer, the starch of said copolymer being selected from the group consisting of waxy maize, waxy milo, tapioca and potato starches, and having a cooked fluidity of 43-53 ml.; polyvinyl alcohol in a weight ratio of about 60:1 of graft copolymer to polyvinyl alcohol; and water in an amount sufficient to provide a liquid adhesive composition prior to drying of about 45-55% solids.
Claim 5
Dependent Claim
119 words
An adhesive composition for remoistenable pregummed tape requiring open times greater than 20 seconds and tack times less than 2.5 seconds, consisting essentially of: (a) at least 90% by weight of a derivatized, thinned, starch-acrylamide graft copolymer, the starch portion of said copolymer being selected from the group consisting of root and root-type starches and having a cooked fluidity in the range of 43-53 ml.; (b) from 1-2.9% by weight of a hydrophilic substance for improving rewetting characteristics of said pregummed tape selected from the group consisting of carboxymethylcellulose, methyl ether of cellulose and hydroxyethyl cellulose; and (c) from about 0.25-1.9% by weight of a partially hydroylzed polyvinyl alcohol for improving tack and rewet characteristics of said pregummed tape.
Claim 6
Dependent Claim
119 words
An adhesive composition for remoistenable pregummed tape requiring open times greater than 20 seconds and tack times less than 2.5 seconds, consisting essentially of: (a) at least 90% by weight of a derivatized, thinned, starch-acrylamide graft copolymer, the starch portion of said copolymer being selected from the group consisting of root and root-type starches and having a cooked fluidity in the range of 43-53 ml.; (b) from 1-2.9% by weight of a hydrophilic substance for improving rewetting characteristics of said pregummed tape selected from the group consisting of carboxymethylcellulose, methyl ether of cellulose and hydroxyethyl cellulose; and (c) from about 0.25-1.9% by weight of a partially hydroylzed polyvinyl alcohol for improving tack and rewet characteristics of said pregummed tape.
Claim 7
Dependent Claim
46 words
The adhesive composition of claim 3, wherein the hydrophilic substance is carboxymethylcellulose and is present in the range of about 1.7-2.3% by weight, and the polyvinyl alcohol contains about 20% polyvinyl acetate, and is present in an amount from about 0.5% to about 1% by weight.
Claim 8
Dependent Claim
15 words
The adhesive composition of claim 2, wherein the starch is a hydrolyzed waxy maize starch.
Claim 9
Independent Claim
122 words
The method of making an adhesive composition for remoistenable pregummed fiber reinforced tapes, the steps consisting essentially of admixing, as the adhesive component, about 1-2.9% by weight carboxymethylcellulose; about 0.25-1.9% by weight polyvinyl alcohol which is no more than about 97% hydrolyzed; and a reduced viscosity starch-acrylamide graft copolymer, said starch being selected from the group consisting of waxy maize, waxy milo, tapioca and potato starches, and having a cooked fluidity in the range of 43-53 ml.; admixing about 3-10 parts of a plasticizer component to about 100 parts of said starch-acrylamide graft copolymer/carboxymethylcellulose/polyvinyl alcohol component; admixing sufficient water with the said components to provide a 40-60% solids adhesive composition; and heating the mixture to a temperature sufficient to gelatinize the starch.
Claim 10
Independent Claim
122 words
The method of making an adhesive composition for remoistenable pregummed fiber reinforced tapes, the steps consisting essentially of admixing, as the adhesive component, about 1-2.9% by weight carboxymethylcellulose; about 0.25-1.9% by weight polyvinyl alcohol which is no more than about 97% hydrolyzed; and a reduced viscosity starch-acrylamide graft copolymer, said starch being selected from the group consisting of waxy maize, waxy milo, tapioca and potato starches, and having a cooked fluidity in the range of 43-53 ml.; admixing about 3-10 parts of a plasticizer component to about 100 parts of said starch-acrylamide graft copolymer/carboxymethylcellulose/polyvinyl alcohol component; admixing sufficient water with the said components to provide a 40-60% solids adhesive composition; and heating the mixture to a temperature sufficient to gelatinize the starch.
Claim 11
Dependent Claim
50 words
The method of claim 6, wherein the adhesive component consists essentially of: (a) 94.2-99.75% by weight of reduced viscosity waxy maize starch-acrylamide graft copolymer; (b) 1.7-2.9% by weight carboxymethylcellulose; and (c) 0.25-1.9% by weight polyvinyl alcohol; and adding sufficient water to make an adhesive composition having about 45-50% total solids.
Claim 12
Dependent Claim
39 words
The method of claim 6, further including a petrolatum lubricant, and wherein the plasticizer is selected from the group consisting of urea, sodium nitrate, mixtures of sodium nitrate and calcium chloride, sorbitol, corn syrup, sodium methacrylate, and mixtures thereof.
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) | 1983-03-11 | 1983-09-10 | 1984-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-11 | 1987-09-10 | 1988-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-11 | 1991-09-10 | 1992-03-11 | $7700.00 | Window Closed / Lapsed |