US4366288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulverulent coating materials
Assignee: Bayer AG
•
Filing: 1980-10-23
•
Granted: 1982-12-28
•
Expires: 2000-10-23
Abstract
Abstract Pulverulent coating materials consisting of saponified ethylene vinyl acetate copolymers and, as cross-linking agents, polycarbodiimides and/or polyuretone imines.
Inventors
- 👤 Raoul Resz
- 👤 Walter Schafer
- 👤 Aziz El Sayed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:35
CPC Classifications
C; C09; C09D; C09D123/00; C09D123/02; C09D123/04; C09D123/08; C09D123/0846; C09D123/0853; C09D129/00; C09D129/02; C09D129/04; C08; C08L; C08L79/00; C08L79/04; C08L79/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
165 words
Pulverulent coating materials melting at from 60° to 150° C., consisting of (a) from 50 to 99% by weight of saponified ethylene-vinyl acetate copolymers, which contain ethylene and vinyl acetate in molar ratios of from 2:1 to 20:1 before saponification and which are saponified to hydrolysis levels of from 50 to 100%, and (b) from 1 to 50% by weight of polycarbodiimides, having cross-linking activity above 130° C., of the general formula (1): ##STR6## wherein R represents an alkylene, cycloalkylene, aralkylene or arylene group, A represents hydrogen or a blocked isocyanate group having dissociation temperatures of above 130° C., and x represents an integer from 2 to 20, and/or polyuretone imines, which are obtained by reacting the polycarbodiimides of formula (1) with (cyclo)aliphatic, araliphatic or aromatic di- and/or triisocyanates thereby linking the polycarbodiimide molecules according to the general formulae (2) and (3): ##STR7## wherein R' represents a bi- or trifunctional organic radical whereby the total of components (a) and (b) amounts to 100% by weight.
Claim 2
Dependent Claim
165 words
Pulverulent coating materials melting at from 60° to 150° C., consisting of (a) from 50 to 99% by weight of saponified ethylene-vinyl acetate copolymers, which contain ethylene and vinyl acetate in molar ratios of from 2:1 to 20:1 before saponification and which are saponified to hydrolysis levels of from 50 to 100%, and (b) from 1 to 50% by weight of polycarbodiimides, having cross-linking activity above 130° C., of the general formula (1): ##STR6## wherein R represents an alkylene, cycloalkylene, aralkylene or arylene group, A represents hydrogen or a blocked isocyanate group having dissociation temperatures of above 130° C., and x represents an integer from 2 to 20, and/or polyuretone imines, which are obtained by reacting the polycarbodiimides of formula (1) with (cyclo)aliphatic, araliphatic or aromatic di- and/or triisocyanates thereby linking the polycarbodiimide molecules according to the general formulae (2) and (3): ##STR7## wherein R' represents a bi- or trifunctional organic radical whereby the total of components (a) and (b) amounts to 100% by weight.
Claim 3
Dependent Claim
25 words
Coating materials according to claim 1, in which component (a) contains ethylene and vinyl acetate in molar ratios of from 4:1 to 10:1 before saponification.
Claim 4
Dependent Claim
23 words
Coating materials according to claim 1, in which A in component (b) is blocked isocyanate group having dissociation temperatures of above 180° C.
Claim 5
Dependent Claim
18 words
Coating materials according to claim 1, in which R in component (b) is an optionally substituted cycloalkylene group.
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) | 1985-12-27 | 1986-06-28 | 1986-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-27 | 1990-06-28 | 1990-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-27 | 1994-06-28 | 1994-12-28 | $7700.00 | Window Closed / Lapsed |