HOT-MELT ADHESIVES WITH IMPROVED ADHESION ON LOW-ENERGY SURFACES

• US 20120171466A1
• Filed: 02/27/2012
• Published: 07/05/2012
• Est. Priority Date: 08/26/2009
• Status: Active Grant

• Current Assignee: Sika Technology Ag (Compagnie de Saint-Gobain SA)
• Original Assignee: Sika Technology Ag (Compagnie de Saint-Gobain SA)
• Inventors: PASCHKOWSKI, Kai, LINNENBRINK, Martin, URBACH, Dirk
• Granted Patent: US 9,359,534 B2
• Time in Patent Office: Days
• US Class Current: 428/317.7
• CPC Class Codes: C08L 23/0815 Copolymers of ethene with aliphatic 1-olefins
• CPC Class Codes: C08L 23/22 Copolymers of isobutene; Butyl rubber ; Homo- or copolymers of other iso-olefins
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 2666/24 Graft or block copolymers according to groups C08L51/00, C08L53/00 or C08L55/02; Derivatives thereof
• CPC Class Codes: C08L 51/003 grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds C08L51/04, C08L51/06 take precedence
• CPC Class Codes: C08L 91/06 Waxes
• CPC Class Codes: C09J 123/12 Polypropene
• CPC Class Codes: Y10T 428/249982 With component specified as adhesive or bonding agent
• CPC Class Codes: Y10T 428/249985 Composition of adhesive or bonding component specified
• CPC Class Codes: Y10T 428/31801 Of wax or waxy material

Abstract

A hot-melt adhesive composition, the use thereof, and a composite body including the hot-melt adhesive composition. The hot-melt adhesive composition includes a polyolefin P, which is solid at 25° C., a soft resin WH with a softening point between −10° C. and 40° C., and a polar modified polyolefin wax PW.

Claims

1. A hot-melt adhesive composition, comprising:

a) a polyolefin P, which is solid at 25°

C.;

b) at least one soft resin WH with a softening point, measured by the Ring-And-Ball Method according to DIN EN 1238, between 10°

C. and 40°

C.; and

c) at least one polar-modified polyolefin wax PW.

2. The hot-melt adhesive composition according to claim 1, wherein the polyolefin P has a softening point, measured by the Ring-And-Ball Method according to DIN EN 1238, between 70°

C. and 170°

C.

3. The hot-melt adhesive composition according to claim 1, wherein the polyolefin P is a thermoplastic poly-α

-olefin.

4. The hot-melt adhesive composition according to claim 1, wherein the amount of polyolefin P is 30-60% by weight, based on the hot-melt adhesive composition.

5. The hot-melt adhesive composition according to claim 1, wherein the soft resin WH has a softening point between 0°

C. and 25°

C.

6. The hot-melt adhesive composition according to claim 1, wherein the soft resin WH is a hydrocarbon resin.

7. The hot-melt adhesive composition according to claim 1, wherein the amount of soft resin WH is 30-60% by weight, based on the hot-melt adhesive composition.

8. The hot-melt adhesive composition according to claim 1, wherein the polar polyolefin wax PW has a softening point between 100°

C. and 200°

C.

9. The hot-melt adhesive composition according to claim 1, wherein the polar polyolefin wax PW is a polyethylene wax grafted with maleic anhydride or a polypropylene wax grafted with maleic anhydride.

10. The hot-melt adhesive composition according to claim 1, wherein the amount of polar polyolefin wax PW is 1-20% by weight, based on the hot-melt adhesive composition.

11. A method of bonding, comprising bonding a first substrate to a second substrate with the hot-melt adhesive composition according to claim 1.

12. A composite body, comprising:

a) a first substrate S1, which is a polyolefin film;

b) the hot-melt adhesive composition according to claim 1; and

c) a second substrate S2,

wherein the hot-melt adhesive composition is arranged between the first substrate S1 and the substrate S2.

13. The composite body according to claim 12, wherein the first substrate S1 is a polyolefin film and the second substrate S2 is a polyolefin foam or a polyolefin fiber material.

14. The composite body according to claim 12, wherein concrete is arranged on a side of the second substrate S2 that faces away from the first substrate S1.

15. The composite body according to claim 14, wherein the second substrate S2 is a porous material and the concrete at least partially contacts the hot-melt adhesive composition.

16. The hot-melt adhesive composition according to claim 1, wherein the polyolefin P has a softening point, measured by the Ring-And-Ball Method according to DIN EN 1238, between 80°

C. and 120°

C.

17. The hot-melt adhesive composition according to claim 1, wherein the polyolefin P has a softening point, measured by the Ring-And-Ball Method according to DIN EN 1238, between 90°

C. and 110°

C.

18. The hot-melt adhesive composition according to claim 1, wherein the polyolefin P is an atactic poly-α

-olefin (APAO).

19. The hot-melt adhesive composition according to claim 1, wherein the amount of polyolefin P is 40 and 50% by weight, based on the hot-melt adhesive composition.

20. The hot-melt adhesive composition according to claim 1, wherein the soft resin WH has a softening point between 10°

C. and 25°

C.

21. The hot-melt adhesive composition according to claim 1, wherein the soft resin WH is an aliphatic C₅-C₉-hydrocarbon resin.

22. The hot-melt adhesive composition according to claim 1, wherein the amount of soft resin WH is 40-50% by weight, based on the hot-melt adhesive composition.

23. The hot-melt adhesive composition according to claim 1, wherein the polar polyolefin wax PW has a softening point between 120°

C. and 170°

C.

24. The hot-melt adhesive composition according to claim 1, wherein the amount of polar polyolefin wax PW is 2.5-10% by weight, based on the hot-melt adhesive composition.

25. The method according to claim 11, wherein the first substrate includes a polyolefin material, and the second substrate includes a foam, fiber material or film.