Polyvinyl chloride-plastisol having improved adhesion

• US 4,268,548 A
• Filed: 09/26/1979
• Issued: 05/19/1981
• Est. Priority Date: 09/27/1978
• Status: Expired due to Term

• Current Assignee: Schering Ag (Merck & Co., Inc.)
• Original Assignee: Schering Ag (Merck & Co., Inc.)
• Inventors: Volland, Hans-Gunter, Burba, Christian, Esper, Norbert
• Primary Examiner(s): Smith, Ronald H.
• Assistant Examiner(s): Bell, Janyce A.
• Application Number:
  US06/079,089
• Time in Patent Office: 601 Days
• Field of Search: 427/388.2, 427/388.5, 427/387, 260/32.4, 260/31.8
• US Class Current: 427/387
• CPC Class Codes: B05D 7/14 to metal, e.g. car bodies involving a chemical reaction between the metal and the coating C23
• CPC Class Codes: C08L 2666/28 Non-macromolecular organic substances
• CPC Class Codes: C09D 127/06 Homopolymers or copolymers of vinyl chloride

Abstract

What is disclosed are a method for coating or adhering a substrate material which comprises applying to said substrate material a plastisol composition comprising a polymer of vinyl chloride and then baking the composition onto the substrate material at a temperature between about 100° C. and 200° C., said plastisol composition further comprising from 0.05 to 5 percent, by weight of said plastisol composition, of an adhesion improver which is a compound or compounds having an azomethine group and a silane group and plastisol compositions for practising such a method.

Claims

1. A method which comprises applying to a substrate material a plastisol composition comprising a polymer of vinyl chloride and then baking the composition onto the substrate material at a temperature between about 100°

C. and 200°

C., said plastisol composition further comprising from 0.05 to 5 percent, by weight of said plastisol composition, of an adhesion improver which is a compound or compounds having an azomethine group and a silane group and wherein, if said azomethine group and said silane group are separately present in different compounds, then said compound having a silane group is an aminosilane.

2. A method as in claim 1 wherein at least one compound having an azomethine group is present together with at least one aminosilane in a weight ratio between 10:

90 and 90;

10.

3. A method as in claim 1 wherein said adhesion improver is at least one compound having both an azomethine group and a silane group.

4. A method as in claim 3 wherein the compound having an azomethine group and a silane group is a Schiff base of an aminosilane.

5. A method as in claim 3, wherein the compound having an azomethine group and a silane group is a compound prepared by linking a Schiff base and a silane, each having a further reactive group therein, with a linking compound having a plurality of linking groups reactive with said further reactive groups of said Schiff base and said silane.

6. A method as in claim 1 wherein said substrate is metallic.

7. A method as in claim 6 wherein said metallic substrate is aluminum which has not been pretreated.

8. A plastisol composition comprising a polymer of vinyl chloride together with an adhesion improver which is a compound or compounds having an azomethine group and a silane group and wherein, if said azomethine group and said silane group are separately present in different compounds, then said compound having a silane group is an aminosilane.

9. A plastisol composition as in claim 8 wherein at least one compound having an azomethine group is present together with at least one aminosilane in a weight ratio between 10:

90 and 90;

10.

10. A plastisol composition as in claim 8 wherein said adhesion improver is at least one compound having both an azomethine group and a silane group.

11. A plastisol composition as in claim 10 wherein the compound having an azomethine group and a silane group is a Schiff base of an aminosilane.

12. A plastisol composition as in claim 8 wherein the compound having an azomethine group and a silane group is a compound prepared by linking a Schiff base and a silane, each having a further reactive group therein, with a linking compound having a plurality of linking groups reactive with said further reactive groups of said Schiff base and said silane.