US4639475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesive stick and a process for its production
Assignee: Henkel AG and Co KGaA
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Filing: 1984-04-17
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Granted: 1987-01-27
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Expires: 2004-04-17
Abstract
Abstract The invention relates to an adhesive stick of an adhesive resin dissolved and/or dispersed in an aqueous solvent system and containing a gel-forming component and, if desired, other standard additives. The new adhesive stick is characterized in that its adhesive layers applied by rubbing onto a receiving surface show permanently tacky pressure-sensitive adhesive properties and in that the stick contains the reaction product of sorbitol and/or xylitol and benzaldehyde as the gel-forming component and, as adhesive resin, a reaction mixture from the reaction of methyl vinyl ether/maleic acid anhydride copolymers with partially neutralized acid phosphate esters of nonionic wetting agents of the lower alkylene oxide adduct type.
Inventors
- 👤 Wolfgang Dierichs
- 👤 Gerhard Gierenz
- 👤 Gabriella Kraus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:16
CPC Classifications
C; C09; C09J; C09J9/00; C09J9/005; Y; Y10; Y10S; Y10S526/00; Y10S526/91; Y10S526/911
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
173 words
An adhesive applicator crayon or stick comprised of an amount of more than 50% by weight of the finished crayon or stick of an adhesive resin dissolved and/or dispersed in an amount of at most 35% by weight of the finished crayon or stick of an aqueous solvent system, from 1% to 10% by weight of a gel-forming component and, optionally, other conventional additives for adhesive applicator crayons or sticks, whereby, when applied by rubbing onto a receiving surface, the adhesive layer produced has permanently tacky pressure-sensitive adhesive properties, said adhesive applicator crayon or stick consisting essentially of the reaction product of sorbitol and/or xylitol and benzaldehyde, as said gel-forming component, and the reaction mixture from the reaction of 1 part by weight of methyl vinyl ether/maleic acid anhydride copolymers with from 5 to 12 parts by weight of partially neutralized acid phosphate esters of nonionic wetting agents of the lower alkylene oxide adduct type (pH-value of a 10% solution of the phosphate esters being from 5 to 6), as said adhesive resin.
Claim 2
Dependent Claim
173 words
An adhesive applicator crayon or stick comprised of an amount of more than 50% by weight of the finished crayon or stick of an adhesive resin dissolved and/or dispersed in an amount of at most 35% by weight of the finished crayon or stick of an aqueous solvent system, from 1% to 10% by weight of a gel-forming component and, optionally, other conventional additives for adhesive applicator crayons or sticks, whereby, when applied by rubbing onto a receiving surface, the adhesive layer produced has permanently tacky pressure-sensitive adhesive properties, said adhesive applicator crayon or stick consisting essentially of the reaction product of sorbitol and/or xylitol and benzaldehyde, as said gel-forming component, and the reaction mixture from the reaction of 1 part by weight of methyl vinyl ether/maleic acid anhydride copolymers with from 5 to 12 parts by weight of partially neutralized acid phosphate esters of nonionic wetting agents of the lower alkylene oxide adduct type (pH-value of a 10% solution of the phosphate esters being from 5 to 6), as said adhesive resin.
Claim 3
Dependent Claim
30 words
The adhesive applicator crayon or stick of claim 1 wherein said adhesive resin is present in an amount of at least 60% by weight of the finished crayon or stick.
Claim 4
Dependent Claim
31 words
The adhesive applicator crayon or stick of claim 1 wherein said adhesive resin is present in an amount of from 65% to 75% by weight of the finished crayon or stick.
Claim 5
Dependent Claim
32 words
The adhesive applicator crayon or stick of claim 3 wherein said aqueous solvent system is present in an amount of from 20% to 30% by weight of the finished crayon or stick.
Claim 6
Dependent Claim
31 words
The adhesive applicator crayon or stick of claim 1 wherein said gel-forming component is present in an amount of from 1.5% to 4% by weight of the finished crayon or stick.
Claim 7
Dependent Claim
45 words
The adhesive applicator crayon or stick of claim 1 wherein said crayon or stick has a compressive strength of at least 20N as determined at 21°±1° C. on cylindrical test specimens 30 mm long and 16 mm in diameter using an Erichsen compressive strength gauge.
Claim 8
Dependent Claim
45 words
The adhesive applicator crayon or stick of claim 1 wherein said crayon or stick has a compressive strength of at least 30N as determined at 21°±1° C. on cylindrical test specimens 30 mm long and 16 mm in diameter using an Erichsen compressive strength gauge.
Claim 9
Dependent Claim
56 words
The adhesive applicator crayon or stick of claim 1 wherein said aqueous solvent system is a homogeneous mixture of (1) water, (2) a liquid having up to 6 carbon atoms selected from the group consisting of alkanols, alkanediols, di-lower alkyl ethers of alkanediols and mono-lower alkyl ethers of alkanediols, and (3) a water-miscible strongly polar solvent.
Claim 10
Dependent Claim
44 words
The adhesive applicator crayon or stick of claim 8 wherein said liquid having up to 6 carbon atoms is selected from the group consisting of ethanol, ethylene glycol and the monomethyl ether of ethylene glycol, and said water-miscible strongly polar solvent is N-methyl pyrrolidone.
Claim 11
Dependent Claim
27 words
The process of applying pressure-sensitive adhesive coatings having permanent tackiness to a surface comprising rubbing the adhesive applicator crayon or stick of claim 1 on said surface.
References Cited (Backward Citations)
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-26 | 1990-07-28 | 1991-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-26 | 1994-07-28 | 1995-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-26 | 1998-07-28 | 1999-01-27 | $7700.00 | Window Closed / Lapsed |