US4296017A
Expired / Lapsed
US
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Graft copolymer pressure-sensitive adhesives, their manufacture and use
Assignee: Wacker Chemie AG
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Filing: 1980-01-18
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Granted: 1981-10-20
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Expires: 2000-01-18
Abstract
Abstract Pressure-sensitive adhesives which contain preferably from 60% to 85% by weight of graft copolymers for use as polymeric pressure-sensitive adhesives, and from 15% to 40% by weight of plasticizers such as phthalate or phosphate plasticizers. The graft copolymer consists of from 5% to 30% by weight of a graft base and from 70% to 95% by weight of grafted-on monomer units. The graft base is a copolymer with from 40% to 85% by weight of ethylene units and from 15% to 60% by weight of vinyl acetate units and optionally up to 10% by weight of monomer units of other unsaturated compounds. It may be replaced wholly or partially by other graft bases. The grafted-on monomer units consist of from 30% to 80% by weight of units of vinyl esters of short-chained carboxylic acids, especially vinyl acetate, from 20% to 70% by weight of units of vinyl esters of relatively long-chained carboxylic acids, for example vinyl laurate, and/or units of esters of α,β-unsaturated carboxylic acids with relatively long-chained alcohols and/or units of esters of unsaturated dicarboxylic acids with relatively long-chained alcohols, from 0.5% to 15% by weight of N-vinyl-2-pyrrolidone units and from 0 to 20% by weight of other olefinically-unsaturated copolymerizable monomer units.
Inventors
- 👤 Rudolf Weissgerber
- 👤 Alois Stoll
- 👤 Herbert Kandler
- 👤 Hans-Herbert Nunner
- 👤 Christine Eichelseder
- 👤 Helmut Pangeri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:46
CPC Classifications
C; C09; C09J; C09J151/00; C09J151/06; C08; C08F; C08F255/00; C08F255/02; C08F255/026; C08F263/00; C08F263/02; C08F263/04; C09J151/003; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2852; Y10T428/2878; Y10T428/2887; Y10T428/31504; Y10T428/31551; Y10T428/31645; Y10T428/31649; Y10T428/31652; Y10T428/31667; Y10T428/31678; Y10T428/31692; Y10T428/31699; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
279 words
A graft copolymer for use as a polymeric pressure-sensitive adhesive consisting of (I) from 5% to 30% by weight of a graft base soluble in the monomer component selected from the group consisting of (i) a copolymer of 40% to 85% by weight of said copolymer of ethylene units, 15% to 60% by weight of said copolymer of vinyl acetate units and 0 to 10% by weight of said copolymer of monomer units copolymerizable with ethylene and vinyl acetate, (ii) said copolymer with up to 10% by weight of said copolymer of vinyl alcohol units derived from vinyl acetate units, and (iii) mixtures of 25% to 99.9% by weight of said copolymer with from 0.1% to 75% by weight of other graftable polymers soluble in the monomer component, and (II) from 70% to 95% by weight of a monomer mixture grafted to said graft base consisting of (a) from 30% to 80% by weight of said mixture of vinyl esters of alkanoic acids having 2 to 4 carbon atoms, (b) from 20% to 70% by weight of said mixture of monomers selected from the group consisting of vinyl esters of alkanoic acids having 6 to 18 carbon atoms, esters of α,β-alkenoic acids having 3 to 8 carbon atoms, with alkanols having 3 to 18 carbon atoms, esters of alkenedioic acids having 4 to 8 carbon atoms, with alkanols having 3 to 18 carbon atoms, and mixtures thereof, (c) from 0.5% to 15% by weight of said mixture, of N-vinyl-2-pyrrolidone, (d) from 0 to 20% by weight of other olefinically-unsaturated compounds copolymerizable with said components (a), (b) and (c), and (e) from 0 to 25% by weight of a plasticizer.
Claim 2
Dependent Claim
279 words
A graft copolymer for use as a polymeric pressure-sensitive adhesive consisting of (I) from 5% to 30% by weight of a graft base soluble in the monomer component selected from the group consisting of (i) a copolymer of 40% to 85% by weight of said copolymer of ethylene units, 15% to 60% by weight of said copolymer of vinyl acetate units and 0 to 10% by weight of said copolymer of monomer units copolymerizable with ethylene and vinyl acetate, (ii) said copolymer with up to 10% by weight of said copolymer of vinyl alcohol units derived from vinyl acetate units, and (iii) mixtures of 25% to 99.9% by weight of said copolymer with from 0.1% to 75% by weight of other graftable polymers soluble in the monomer component, and (II) from 70% to 95% by weight of a monomer mixture grafted to said graft base consisting of (a) from 30% to 80% by weight of said mixture of vinyl esters of alkanoic acids having 2 to 4 carbon atoms, (b) from 20% to 70% by weight of said mixture of monomers selected from the group consisting of vinyl esters of alkanoic acids having 6 to 18 carbon atoms, esters of α,β-alkenoic acids having 3 to 8 carbon atoms, with alkanols having 3 to 18 carbon atoms, esters of alkenedioic acids having 4 to 8 carbon atoms, with alkanols having 3 to 18 carbon atoms, and mixtures thereof, (c) from 0.5% to 15% by weight of said mixture, of N-vinyl-2-pyrrolidone, (d) from 0 to 20% by weight of other olefinically-unsaturated compounds copolymerizable with said components (a), (b) and (c), and (e) from 0 to 25% by weight of a plasticizer.
Claim 3
Dependent Claim
26 words
The graft polymers of claim 1 wherein said graft base contains from 15 to 50% by weight of other graftable polymers soluble in the monomer component.
Claim 4
Dependent Claim
16 words
The graft polymers of claim 2 wherein said other graftable polymers are polyvinyl lower alkyl ethers.
Claim 5
Dependent Claim
28 words
The graft polymers of claim 1 wherein said graft base copolymer of ethylene and vinyl acetate has a melt index (i 2 ) of from 5 to 100.
Claim 6
Dependent Claim
74 words
A pressure-sensitive adhesive containing from 60% to 85% by weight of the graft copolymer of claim 1, from 10% to 40% by weight of a monomer plasticizer, where the total amount of said plasticizer in the adhesive is at least 15% by weight, and from 0 to 25% by weight of pressure-sensitive adhesive additives selected from the group consisting of natural and synthetic resins, natural and synthetic waxes, paraffin oils, solvents, pigments and dyestuffs.
Claim 7
Dependent Claim
28 words
The pressure-sensitive adhesive of claim 5 wherein said monomeric plasticizer is a polyester of an organic polycarboxylic acid with an alkanol having from 4 to 13 carbon atoms.
Claim 8
Dependent Claim
54 words
The pressure-sensitive adhesive of claim 5 wherein said monomeric plasticizer is a tertiary phosphonic acid ester with an alcohol selected from the group consisting of alkanols having from 2 to 10 carbon atoms, haloalkanols having from 2 to 10 carbon atoms, phenol and alkylphenols having from 1 to 4 carbon atoms in the alkyls.
Claim 9
Dependent Claim
30 words
A pressure-sensitive adhesive-backed laminate consisting of a carrier material having applied to one side thereof from 5 to 100 gm/m 2 of at least one pressure-sensitive adhesive of claim 5.
References Cited (Backward Citations)
US3911053A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-19 | 1985-04-20 | 1985-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-19 | 1989-04-20 | 1989-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-19 | 1993-04-20 | 1993-10-20 | $7700.00 | Window Closed / Lapsed |