Patent US4433095A successfully refreshed from Google Patents.
US4433095A
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Aqueous adhesives containing water-dispersible polyisocyanate preparations
Assignee: Bayer AG
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Filing: 1982-03-15
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Granted: 1984-02-21
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Expires: 2002-03-15
Abstract
Abstract The invention relates to aqueous adhesives which are based on water-dispersible polymers and which contain water-dispersible polyisocyanate preparations having an average NCO-functionality of at least 2.2, which, in addition to an aromatic polyisocyanate or a mixture of aromatic polyisocyanates, contain a quantity of emulsifier sufficient to guarantee the dispersibility of the polyisocyanates, as additives capable of improving the bonding properties of these adhesives.
Inventors
- 👤 Rudolf Hombach
- 👤 Helmut Reiff
- 👤 Wolfgang Wenzel
- 👤 Manfred Dollhausen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:21
CPC Classifications
C; C09; C09J; C09J121/00; C09J121/02; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/703; C08G18/705; C08G18/706; C09J175/00; C08G2170/00; C08K; C08K5/00; C08K5/16; C08K5/29
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
80 words
Aqueous adhesives comprising an aqueous polymer dispersion and a water-dispersible polyisocyanate having an average NCO-functionality of at least 2.2 and comprising (a) an aromatic polyisocyanate having an NCO-functionality of at least 3 or a mixture of aromatic polyisocyanates having an average NCO-functionality of at least 2.2 and (b) an emulsifier produced by reacting aromatic polyisocyanates with hydrophilic compounds containing isocyanate-reactive groups in an NCO/OH-equivalent ratio of at least 1:1, in a quantity sufficient to guarantee the dispersibility of the polyisocyanates.
Claim 2
Dependent Claim
80 words
Aqueous adhesives comprising an aqueous polymer dispersion and a water-dispersible polyisocyanate having an average NCO-functionality of at least 2.2 and comprising (a) an aromatic polyisocyanate having an NCO-functionality of at least 3 or a mixture of aromatic polyisocyanates having an average NCO-functionality of at least 2.2 and (b) an emulsifier produced by reacting aromatic polyisocyanates with hydrophilic compounds containing isocyanate-reactive groups in an NCO/OH-equivalent ratio of at least 1:1, in a quantity sufficient to guarantee the dispersibility of the polyisocyanates.
Claim 3
Dependent Claim
24 words
The adhesives according to claim 1, characterized in that component (a) of the water-dispersible polyisocyanate is a polyisocyanate mixture of the diphenyl methane series.
Claim 4
Dependent Claim
45 words
The adhesives according to claim 1, characterized in that component (b) of the water-dispersible polyisocyanate is a reaction product of an aromatic polyisocyanate with a monohydric or polyhydric, non-ionic polyalkylene polyether alcohol with at least one polyether chain containing at least 10 ethylene oxide units.
Claim 5
Dependent Claim
49 words
The adhesives according to claim 3, characterized in that the polyalkylene polyether alcohol is a monohydric alcohol of the type obtained by alkoxylating a monohydric starter molecule in which the polyether chain consists of 10 to 70 alkylene oxide units of which at least 60% are ethylene oxide units.
Claim 6
Dependent Claim
48 words
The adhesives according to claim 1, characterized in that the aqueous adhesive consists of an aqueous dispersion of homopolymers or copolymers of olefinically-unsaturated monomers optionally comprising additives and auxiliaries of the type normally used in adhesives and having a solids content of from 10 to 65%, by weight.
Claim 7
Dependent Claim
37 words
The adhesives according to claim 1 or claim 5 characterized in that the polyisocyanate preparation is added to the adhesive in a quantity of from 1 to 20%, by weight, based on the total weight of adhesive.
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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) | 1987-02-20 | 1987-08-22 | 1988-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-20 | 1991-08-22 | 1992-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-20 | 1995-08-22 | 1996-02-21 | $7700.00 | Window Closed / Lapsed |