US4885331A
Expired / Lapsed
US
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Polyester melt-adhesive compositions and methods of making and using them
Assignee: Uhde Inventa Fischer AG
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Filing: 1988-06-10
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Granted: 1989-12-05
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Expires: 2008-06-10
Abstract
Abstract Heat-resistant, polymer-containing, solvent-free adhesive compositions are prepared by reacting a novel mixture of saturated polyester or copolyester with capped isocyanate under the influence of temperature and, if necessary, catalysts, with evident viscosity increase, with cross-linking as appropriate. The adhesive compositions combine the process-technical properties of low-viscosity melt-adhesives and the strength, tenacity and stability of cross-linked duroplasts or high-viscosity thermoplasts. Subsequent working and protection from explosion are not necessary. Use is possible in each known art for melt-adhesives, e.g. as paste, powder, melt, textiles, or flat structures. In addition, the compositions are suitable as melt coatings or for injection moulding reactions.
Inventors
- 👤 Frank Annighofer
- 👤 Ewald Schneider
- 👤 Hans-Joachim Schultze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:02
CPC Classifications
C; C09; C09J; C09J175/00; C09J175/04; C09J175/06; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/79; C08G18/791; C08G18/798; C08G18/80; C08G18/8061; C08G2170/00; C08G2170/20
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
50 words
An adhesive composition comprising a saturated polyester component containing at least 2 OH and/or COOH functional groups and having a viscosity of at least 12 Pa.s at 200° C. and 122.6N and a number average molecular weight greater than 10,000, and a capped isocyanate having more than one functional group.
Claim 2
Dependent Claim
50 words
An adhesive composition comprising a saturated polyester component containing at least 2 OH and/or COOH functional groups and having a viscosity of at least 12 Pa.s at 200° C. and 122.6N and a number average molecular weight greater than 10,000, and a capped isocyanate having more than one functional group.
Claim 3
Dependent Claim
17 words
The composition of claim 1 further comprising up to 30% by weight of catalysts and/or other additives.
Claim 4
Dependent Claim
26 words
The composition of claim 2 wherein there is 50 to 99% by weight of said polyester component and 1 to 30% by weight of said isocyanate.
Claim 5
Dependent Claim
21 words
The composition of claim 1 wherein said isocyanate is taken from the class consisting of aliphatic, alicyclic, aromatic, and heterocyclic isocyanates.
Claim 6
Dependent Claim
35 words
The composition of claim 4 wherein said isocyanate is taken from the class consisting of hexamethylenediisocyanate, isophoronediisocyanate, phenylenediisocyanate, tolulylenediisocyanate, xylylenediisocyanate, methylenebis(4-phenylisocyanate), methylenetris(4-phenylisocyanate), compounds of formula I and derivatives and the mixtures thereof ##STR3## wherein n≧0.
Claim 7
Dependent Claim
19 words
The composition of claim 1 wherein said isocyanate is capped with a compound having at least one reactive hydrogen.
Claim 8
Dependent Claim
22 words
The composition of claim 6 wherein said compound is taken fronm the class consisting of lactams, amines, imides, ketoximes, alcohols, and phenols.
Claim 9
Dependent Claim
18 words
The composition of claim 1 wherein said capped isocyanate is capped by reaction with itself or another isocyanate.
Claim 10
Dependent Claim
20 words
The composition of claim 8 wherein said capped isocyanate is ##STR4## wherein R, R' and R" are each organic groups.
Claim 11
Dependent Claim
24 words
The composition of claim 2 wherein said catalyst is taken from the class consisting of N-methylpyridine, N,N'-endoethylenepiperazine, dibutyltindilaurate, p-toluenesulfonic acid and carbamic acid chloride.
Claim 12
Dependent Claim
14 words
The composition of claim 9 wherein said organic groups are alkyls cycloalkyls or aralkyls.
Claim 13
Dependent Claim
26 words
The composition of claim 11 wherein said alkyls and said cycloalkyls have 4 to 20 carbon atoms and said aralkyls have 7 to 12 carbon atoms.
Claim 14
Dependent Claim
20 words
The composition of claim 1 wherein the polyester component has a viscosity of 20 to 200 Pa.s at 200° C.
Claim 15
Dependent Claim
20 words
The composition of claim 1 wherein the polyester component has a viscosity of 40 to 150 Pa.s at 200° C.
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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) | 1992-12-04 | 1993-06-05 | 1993-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-04 | 1997-06-05 | 1997-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-04 | 2001-06-05 | 2001-12-05 | $7700.00 | Window Closed / Lapsed |