US4151317A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvinyl chloride plastisols and method of coating metal therewith
Assignee: Bayer Pharma AG
•
Filing: 1978-04-11
•
Granted: 1979-04-24
•
Expires: 1998-04-11
Abstract
Abstract In a method for coating metal by applying a polyvinyl chloride plastisol to the metal and baking the resultant coating, the improvement wherein the plastisol contains an adhesion improver which is an adduct formed between an isocyanate and a Schiff base (ketimine). Improved polyvinyl chloride plastisols for forming a protective coating on metal, said plastisols containing an adhesion improver which is an adduct formed between an isocyanate and a Schiff base (ketimine).
Inventors
- 👤 Christian Burba
- 👤 Hans-Guenter Volland
- 👤 Norbert Esper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:14
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/29; C09; C09D; C09D127/00; C09D127/02; C09D127/04; C09D127/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
90 words
In a method for protectively coating metal which comprises applying to said metal a coating of a polyvinyl chloride plastisol containing an adhesion improver and then baking the coating at a temperature from about 120° C. to about 200° C., the improvement wherein said adhesion improver is from about 0.1 to about 4.0 percent, by weight of the plastisol, of an adduct formed between substantially equivalent amounts of (A) a ketimine containing from about 0.1 to about 1.4 azomethine groups per 100 grams of the compound; and (B) an isocyanate.
Claim 2
Dependent Claim
90 words
In a method for protectively coating metal which comprises applying to said metal a coating of a polyvinyl chloride plastisol containing an adhesion improver and then baking the coating at a temperature from about 120° C. to about 200° C., the improvement wherein said adhesion improver is from about 0.1 to about 4.0 percent, by weight of the plastisol, of an adduct formed between substantially equivalent amounts of (A) a ketimine containing from about 0.1 to about 1.4 azomethine groups per 100 grams of the compound; and (B) an isocyanate.
Claim 3
Dependent Claim
19 words
A method as in claim 1 wherein said ketimine is formed between an aliphatic polyamine and an aliphatic ketone.
Claim 4
Dependent Claim
15 words
A method as in claim 1 wherein said isocyanate is an aliphatic or cycloaliphatic isocyanate.
Claim 5
Dependent Claim
49 words
An improved polyvinyl chloride plastisol comprising from about 0.1 to about 4.0 percent, by weight of said plastisol, of an adduct formed between substantially equivalent amounts of: (A) a ketimine containing from about 1.0 to about 1.4 azomethine groups per 100 g of the compound; and (B) an isocyanate.
Claim 6
Dependent Claim
49 words
An improved polyvinyl chloride plastisol comprising from about 0.1 to about 4.0 percent, by weight of said plastisol, of an adduct formed between substantially equivalent amounts of: (A) a ketimine containing from about 1.0 to about 1.4 azomethine groups per 100 g of the compound; and (B) an isocyanate.
Claim 7
Dependent Claim
19 words
A plastisol as in claim 4 wherein said ketimine is formed between an aliphatic polyamine and an aliphatic ketone.
Claim 8
Dependent Claim
21 words
A plastisol as in claim 4 wherein said ketimine is a bis-ketimine formed between a polyaklylene polyamine and an aliphatic ketone.
Claim 9
Dependent Claim
13 words
A plastisol as in claim 6 wherein said polyalkylene polyamine is diethylene triamine.
Claim 10
Dependent Claim
14 words
A plastisol as in claim 6 wherein said aliphatic ketone is methyl isobutyl ketone.
Claim 11
Dependent Claim
15 words
A plastisol as in claim 4 wherein said isocyanate is an aliphatic or cycloaliphatic isocyanate.
Claim 12
Dependent Claim
12 words
A plastisol as in claim 9 wherein said isocyanate is isophorone diisocyanate.
References Cited (Backward Citations)
US3180885A
Cited
US3135796A
Cited
US3324158A
Cited
US3349110A
Cited
US3398170A
Cited
US3309332A
Cited
US3368974A
Cited
US3440087A
Cited
US3549407A
Cited
US3674695A
Cited
US3752693A
Cited
US3937716A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-23 | 1982-10-23 | 1983-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-23 | 1986-10-23 | 1987-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-23 | 1990-10-23 | 1991-04-24 | $7700.00 | Window Closed / Lapsed |