Adhesive compositions and methods of using the same

• US 20060030689A1
• Filed: 04/12/2005
• Published: 02/09/2006
• Est. Priority Date: 08/06/2004
• Status: Active Grant

• Current Assignee: Oatey Company (CRWS, Inc.)
• Original Assignee: Oatey Company (CRWS, Inc.)
• Inventors: Scholer, Fred R., Parhar, Amrit K., Hampton, Forest III, Bush, Charles N.
• Granted Patent: US 7,473,753 B2
• Time in Patent Office: Days
• US Class Current: 528/196
• CPC Class Codes: C09J 127/06 Homopolymers or copolymers of vinyl chloride

Abstract

Adhesive compositions are described which comprise at least one organic sulfoxide, sulfone or sulfide and at least one ketone, ether, ester, amide or carbonate or a mixture thereof. The adhesive compositions also may contain one or more water insoluble polymers such as ABS, PVC and CPVC. Methods of adhesively bonding or welding a first plastic surface to a second plastic surface using these adhesive compositions also are described.

Claims

1. An adhesive composition which is free of alkyl substituted benzenes and alkyl substituted naphthalenes and which comprises a mixture of:

(a) at least one organic sulfoxide, sulfone, or sulfide, or a mixture of two or more thereof, wherein the sulfoxide, sulfone and sulfide are characterized by the formulae R₂SO (I) R₂SO₂ (II) and R₂S (III) respectively wherein each R is independently an alkyl or an aryl group, and

(b) at least one ketone, ether, ester, amide, carbonate, or a mixture of two or more thereof.

2. The composition of claim 1 wherein (a) is a dialkyl sulfoxide wherein each alkyl group independently contains from 1 to about 5 carbon atoms.

3. The composition of claim 1 wherein (b) comprises at least two ketones.

4. The adhesive composition of claim 1 wherein each R is independently an alkyl group containing from 1 to about 5 carbon atoms.

5. The adhesive composition of claim 1 wherein (b) comprises a mixture of at least one ketone and N-methyl pyrrolidone.

6. The adhesive composition of claim 1 wherein (b) comprises at least two ketones and N-methyl pyrrolidone.

7. The adhesive composition of claim 1 which is free of tetrahydrofuran.

8. The adhesive composition of claim 1 also comprising ©

) at least one water insoluble polymer comprising polyvinyl chloride, chlorinated polyvinyl chloride, an acrylonitrile-butadiene-styrene polymer, or a mixture of two or more thereof.

9. The adhesive composition of claim 8 also comprising (d) at least one water-insoluble polymer comprising acrylic polymers, vinyl aromatic polymers and vinyl pyrrolidone polymers.

10. The adhesive composition of claim 1 also comprising from about 10 to about 15% by weight of polyvinyl chloride.

11. The adhesive composition of claim 1 wherein the ketone comprises acetone, methyl ethyl ketone, methyl isobutyl ketone, isophorone, cyclopentanone, cyclohexanone, acetyl acetone or acetophenone, or a mixture of two or more thereof.

31. A method of adhesively bonding or welding a first plastic surface to a second plastic surface which comprises:

(I) applying to the first surface or the second surface, or to both surfaces, the adhesive composition of claim 1;

(II) contacting the first surface with the second surface; and

(III) allowing the adhesive composition to form a bond or weld between the first surface and the second surface.

12. An adhesive composition which is free of alkyl substituted benzene and alkyl substituted naphthalene and comprises a mixture of:

(a) at least one dialkyl sulfoxide wherein the alkyl groups each contain from about 1 to about 5 carbon atoms and

(b) at least one ketone.

13. The adhesive composition of claim 12 wherein the dialky sulfoxide is dimethyl sulfoxide.

14. The adhesive composition of claim 12 wherein (b) comprises at least two or more ketones.

15. The adhesive composition of claim 12 wherein (b) comprises a mixture of at least one ketone and N-methyl pyrrolidone.

16. The adhesive composition of claim 12 wherein the ketones comprise acetone, methyl ethyl ketone, methyl propyl ketone, methyl isobutyl ketone, isophorone, cyclopentanone, cyclohexanone, acetyl acetone, acetophenone, or a mixture of two or more thereof.

17. An adhesive composition which is free of alkyl substituted benzenes and alkyl substituted naphthalenes and comprises:

(a) from about 1% to about 30% by weight of a water-insoluble polymer comprising polyvinyl chloride, chlorinated polyvinyl chloride, an acrylonitrile-butadiene-styrene polymer, or a mixture of two or more thereof, and

(b) a solvent mixture comprising (b-1) at least one organic sulfoxide, sulfone, or sulfide or a mixture of two or more thereof, wherein the sulfoxide, sulfone and sulfide are characterized by the formulae R₂SO (I), R₂SO₂ (II), and R₂S (III) respectively wherein each R is independently an alkyl or an aryl group, and

(b-2) at least one ketone, ether, ester, amide or carbonate, or a mixture of two or more thereof.

18. The adhesive composition of claim 17 comprising from about 10 to about 15% by weight of polyvinyl chloride, chlorinated polyvinyl chloride, an acrylonitrile-butadiene-styrene polymer, or mixtures of two or more thereof.

19. The adhesive composition of claim 17 wherein (b-1) is a dialkyl sulfoxide containing from 1 to about 5 carbon atoms.

20. The adhesive composition of claim 17 wherein (b-1) is dimethyl sulfoxide.

21. The adhesive composition of claim 17 wherein (b-2) comprises at least two ketones.

22. The adhesive composition of claim 17 wherein (b-2) comprises at least one ketone and N-methyl pyrrolidone.

23. The adhesive composition of claim 17 wherein the ketones comprise acetone, methyl ethyl ketone, methyl propyl ketone, methyl isobutyl ketone, isophorone, cyclopentanone, cyclohexanone, acetyl acetone, acetophenone, or a mixture of two or more thereof.

24. The adhesive composition of claim 17 also comprising at least one second water insoluble polymer comprising acrylic polymers, vinyl aromatic polymers, vinyl pyrrolidone polymers, or a mixture thereof.

25. The adhesive composition of claim 17 also comprising at least one water-insoluble acrylic polymer.

32. A method of adhesively bonding or welding a first plastic surface to a second plastic surface which comprises:

(I) applying to the first surface or the second surface, or to both surfaces, the adhesive composition of claim 17;

(II) contacting the first surface with the second surface; and

(III) allowing the adhesive composition to form a bond or weld between the first surface and the second surface.

26. An adhesive composition which is free of alkyl substituted benzene and alkyl substituted naphthalene and comprises:

(a) from about 10% to about 15% by weight of polyvinyl chloride, chlorinated polyvinyl chloride, an acrylonitrile-butadiene-styrene polymer or mixtures of two or more thereof, and

(b) a solvent comprising a mixture of dimethyl sulfoxide and at least one ketone.

27. The adhesive composition of claim 26 wherein (a) is polyvinyl chloride.

28. The adhesive composition of claim 26 wherein the solvent comprises dimethyl sulfoxide and at least two ketones.

29. The adhesive composition of claim 26 wherein the solvent (b) comprises dimethyl sulfoxide, at least one ketone and N-methyl pyrrolidone.

30. The adhesive composition of claim 26 which is free of tetrahydrofuran.