Curable composition suitable for the bonding of plasticized PVC

Patent metadata

Field	Value
Publication number	US-9777202-B2
Application number	US-201314390614-A
Country	US
Kind code	B2
Filing date	Apr 9, 2013
Priority date	Apr 10, 2012
Publication date	Oct 3, 2017
Grant date	Oct 3, 2017

Abstract

A composition includes methyl methacrylate MMA, at least one elastomer or a core-shell polymer, and at least one radical former, as an adhesive, sealant or coaling for gluing, sealing or coaling substrates containing plasticized PVC.

First claim

The invention claimed is:

1. An article comprising an adhesive, sealant, or coating composition and a first substrate, wherein:
the composition comprises:
20% to 90% by weight methyl methacrylate, in relation to the total weight of the composition;
either 1% to 40% by weight of at least one elastomer, in relation to the total weight of the composition; 1% to 20% by weight, of at least one core-shell polymer, in relation to the total weight of the composition; or 1% to 40% by weight of at least one elastomer, in relation to the total weight of the composition and 1% to 20% by weight, of at least one core-shell polymer, in relation to the total weight of the composition; and
at least one radical former; and

the first substrate comprises a plasticized polyvinylchloride having from 20% to 40% by weight of a plasticizer, in relation to a total weight of the plasticized PVC.

2. The article of claim 1 comprising from 50% to 80% of the methylmethacrylate.

3. The article of claim 1 comprising from 55% to 70% of the methylmethacrylate.

4. The article of claim 1 comprising 1% to 40% by weight of the at least one elastomer, wherein the elastomer comprises free radically polymerizable groups.

5. The article of claim 1 comprising from 7.5% to 35% of the at least one elastomer.

6. The article of claim 1 comprising from 10% to 20% of the at least one elastomer.

7. The article of claim 1 comprising 1% to 40% by weight of the at least one elastomer, wherein elastomer is a polyurethane or block copolymer.

8. The article of claim 1 comprising 1% to 40% by weight of the at least one elastomer, wherein the elastomer is a polyurethane (meth)acrylate, a vinyl-terminated acrylonitrile/butadiene copolymer, or is a combination of a polyurethane (meth)acrylate, a vinyl-terminated acrylonitrile/butadiene copolymer.

9. The article of claim 1 comprising from 2% to 10% of the at least one core-shell polymer.

10. The article of claim 1 comprising from 2% to 5% of the at least one core-shell polymer.

11. The article of claim 1 comprising 1% to 20% by weight, of at least one core-shell polymer, wherein the core-shell polymer comprises a rigid shell of a rigid thermoplastic polymer which is grafted onto a core of cross-linked elastic acrylate or butadiene polymer.

12. The article of claim 1 comprising 1% to 40% by weight of the at least one elastomer, in relation to the total weight of the composition and 1% to 20% by weight, of the at least one core-shell polymer, in relation to the total weight of the composition.

13. The article of claim 12 , wherein a total quantity of the at least one elastomer and the at least one core-shell polymer is from 10% to 35% by weight, in relation to the total composition.

14. The article of claim 12 , wherein a total quantity of the at least one elastomer and the at least one core-shell polymer is from 12% to 35% by weight, in relation to the total composition.

15. The article of claim 1 , wherein the radical former is a peroxide, a hydroperoxide or a perester.

16. The article of claim 1 , wherein the radical former is dibenzoyl peroxide.

17. The article of claim 1 , wherein the first substrate comprises 25% to 35%, by weight, plasticizer.

18. The article of claim 1 , wherein the elastomer comprises the polymerization product of styrene, butadiene, isoprene, chloroprene, acrylonitrile, methyl methacrylate, chlorosulfonated polyethylene, or a combination of any two or more thereof.

19. The article of claim 1 further comprising a radical forming catalyst comprising a tertiary amine, a transition metal salt, or a transition metal complex.

20. The article of claim 1 , wherein the substrate comprises more than 50% by weight of plasticized PVC, in relation to the total weight of the substrate.

21. The article of claim 20 , wherein the substrate comprises more than 70% by weight of plasticized PVC, in relation to the total weight of the substrate.

22. The article of claim 21 , wherein the substrate comprises more than 90% by weight of plasticized PVC, in relation to the total weight of the substrate.

23. The article of claim 1 , wherein the composition and substrate are configured to be frequently exposed to moisture.

24. The article of claim 1 which is a waterproofing membrane.

25. The article of claim 24 , wherein the waterproofing membrane is an above-ground building construction membrane, an underground building construction membrane, or a civil engineering membrane.

26. A composition comprising:
55% to 65% by weight of methyl methacrylate, in relation to the total weight of the composition;
either 10% to 20% by weight of at least one elastomer, in relation to the total weight of the composition; 2% to 10% by weight, of at least one core-shell polymer in relation to the total weight of the composition; or 10% to 20% by weight of at least one elastomer, in relation to the total weight of the composition and 2% to 10% by weight, of at least one core-shell polymer in relation to the total weight of the composition; and
at least one radical former;
wherein:
the elastomer is a polyurethane (meth)acrylate, a vinyl-terminated acrylonitrile/butadiene copolymer, or a combination thereof; and
the core-shell polymer is an acrylate-based core-shell polymer, or a methylmethacrylate-butadiene-styrene polymer.

27. A method for bonding a first substrate and a second substrate, the method comprising:
applying the composition of claim 26 to a first substrate; and
bonding with the composition the first substrate to a second substrate within an open time of the composition;
allowing the composition to cure;
the first substrate comprises a plasticized PVC, wherein the percentage of plasticizer 20 is 20% by weight-40% by weight, in particular 25% by weight-35% by weight, in relation to the total weight of the plasticized PVC.

28. A method for bonding a first substrate and a second substrate, the method comprising:
applying the composition of claim 26 to a first substrate;
applying the composition to a second substrate; and
joining the first substrate and the second substrate such that the composition on the first substrate contacts the composition on the second substrate during an open time of the composition; and
allowing the composition to cure.

Assignees

• Sika Tech Ag

Inventors

• Meier Heinz
• Haufe Markus
• Lussi Josef
• Jendoubi Elyes
• Carl Wilfried

Classifications

• C08F290/067

  Polyurethanes; Polyureas · CPC title

• C09J175/16

  having terminal carbon-to-carbon unsaturated bonds · CPC title

• C08F285/00

  Macromolecular compounds obtained by polymerising monomers on to preformed graft polymers · CPC title

• Y10T428/2852

  Adhesive compositions · CPC title

• C08G18/755

  and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate · CPC title