US4954577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lacquer binders, coating compositions and wire enamels based on polyamideimides and isocyanates carrying carbodiimide and/or uretone imine groups
Assignee: Bayer AG
•
Filing: 1988-04-18
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Granted: 1990-09-04
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Expires: 2008-04-18
Abstract
Abstract Lacquer binders suitable for the production of highly heat-resistant films and coatings consisting of a mixture of (a) polyamide-imides based on trimellitic anhydride, lactams and diisocyanates, (b) organic compounds carrying (i) carbodiimide and/or uretone imine groups and (ii) blocked isocyanate groups and optionally, (c) auxiliaries and additives. The use of these binders in coating compositions for heat-resistant substrates and a process for the production of wire enamels using said coating compositions.
Inventors
- 👤 Willi Dunwald
- 👤 Hans Schlegel
- 👤 Reinhard Halpaap
- 👤 Josef Pedain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:02
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/80; C08G18/8061; C08G18/28; C08G18/30; C08G18/34; C08G18/343; C08G18/345; C08G18/40; C08G18/64; C08G18/6415; C08G18/6438; C08G18/77; C08G18/78; C08G18/79; C08G18/797; H; H01; H01B; H01B3/00; H01B3/18; H01B3/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
105 words
Lacquer binders containing polyamide imides suitable for the production of highly heat-resistant films and coatings mixtures of (a) high molecular weight compounds containing recurring structural units corresponding to the following general formula ##STR4## in which R 1 is an alkylene radical, a cycloalkylene radical or an arylene radical optionally containing methylene bridges, these radicals optionally being substituted by alkyl groups or halogen, and x is an integer of 2 to 12, and organic compounds containing (i) carbodiimide and/or uretone imine groups and (ii) blocked isocyanate groups, with 1 to 100 parts by weight of component (b) being used to parts by weight of component (a).
Claim 2
Dependent Claim
105 words
Lacquer binders containing polyamide imides suitable for the production of highly heat-resistant films and coatings mixtures of (a) high molecular weight compounds containing recurring structural units corresponding to the following general formula ##STR4## in which R 1 is an alkylene radical, a cycloalkylene radical or an arylene radical optionally containing methylene bridges, these radicals optionally being substituted by alkyl groups or halogen, and x is an integer of 2 to 12, and organic compounds containing (i) carbodiimide and/or uretone imine groups and (ii) blocked isocyanate groups, with 1 to 100 parts by weight of component (b) being used to parts by weight of component (a).
Claim 3
Dependent Claim
57 words
Lacquer binders as claimed in claim 1, characterized in that component (a) is a polyamide imide containing recurring structural units corresponding to the general formula in claim 1 in which R 1 is a difunctional C 6 -C 15 aromatic hydrocarbon radical optionally substituted by methyl groups and/or containing methylene bridges and x is the number 5.
Claim 4
Dependent Claim
73 words
Binders as claimed in claim 1, characterized in that component (b) contains 0 to 25% by weight carbodiimide groups (expressed as --N═C═N--), 0 to 30% by weight uretone imine groups (expressed as structural units having the formula C 2 N 3 O), the sum total of carbodiimide and uretone imine groups (formally expressed as --N═C═N--) being 0.5 to 25% by weight, and 1 to 25% by weight blocked isocyanate groups (expressed as NCO).
Claim 5
Dependent Claim
11 words
Binders claimed in claim 1 in coating compositions for heat-resistant substrates.
Claim 6
Dependent Claim
12 words
Binders in coating compositions as claimed in claim 4 in wire lacquers.
Claim 7
Dependent Claim
46 words
A process for the production of wire enamels by coating wires with a coating composition containing binders and inert solvents with subsequent hardening of the coating at temperatures above 80° C., characterized in that coating compositions containing as binders those claimed in claim 1 are used.
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) | 1993-09-03 | 1994-03-05 | 1994-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-03 | 1998-03-05 | 1998-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-03 | 2002-03-05 | 2002-09-04 | $7700.00 | Window Closed / Lapsed |