Filler compound comprising a positively charged polymer

Patent metadata

Field	Value
Publication number	US-9809696-B2
Application number	US-201514602054-A
Country	US
Kind code	B2
Filing date	Jan 21, 2015
Priority date	Feb 11, 2014
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

A filler compound containing a positively charged polymer that includes (meth)acrylate monomer units having an alkylammonium functionality.

First claim

We claim:

1. A filler compound, comprising:
a polymer resin emulsion comprising a positively charged polymer that provides about 5 to about 50 wt. % of the filler compound,
wherein the positively charged polymer comprises about 2 wt. % to about 45 wt. % of (meth)acrylate monomer units having an alkylammonium functionality;

about 5 wt. % to about 70 wt. % of at least one filler additive;
and,
at least about 10 wt. % of water.

2. The filler compound of claim 1 wherein the positively charged polymer further comprises about 0.1 wt. % to about 5 wt. % of monomer units of (meth)acrylic acid.

3. The filler compound of claim 1 wherein the (meth)acrylate monomer units including an alkylammonium functionality are the reaction product of 2-(dimethylamino)ethyl acrylate or 2-(dimethylamino)ethyl methacrylate with an alkyl bromide or an alkyl chloride having between 1 and 24 carbon atoms.

4. The filler compound of claim 1 wherein the (meth)acrylate monomer units including an alkylammonium functionality are 2-(trimethylammonium)ethyl methacrylate chloride monomer units.

5. The filler compound of claim 1 wherein the positively charged polymer further comprises about 5 wt. % to about 95 wt. % of at least one additional type of monomer unit.

6. The filler compound of claim 5 wherein the at least one additional type of monomer unit is chosen from the group consisting of uncharged (meth)acrylate monomer units, vinyl acetate monomer units, and combinations thereof.

7. The filler compound of claim 1 wherein the polymer resin emulsion further comprises a binder that provides about 5 wt. % to about 50 wt. % of the filler compound.

8. The filler compound of claim 7 wherein the binder is provided in the form of a binder emulsion and wherein the binder emulsion and the polymer resin emulsion are present in the filler compound in the form of a blended emulsion.

9. The filler compound of claim 7 wherein the binder is an acrylic binder.

10. The filler compound of claim 7 wherein the binder is an OH-functional binder.

11. The filler compound of claim 7 wherein the binder, and the positively charged polymer of the polymer resin emulsion, form an immiscible blend upon drying of the filler compound.

12. The filler compound of claim 7 wherein the binder comprises a T g in the range of from about 40° C. to about 60° C. and wherein the positively charged polymer exhibits a T g in the range of from about −30° C. to about −10° C.

13. The filler compound of claim 1 wherein the filler compound further comprises at least one crosslinker.

14. The filler compound of claim 1 wherein the filler compound further comprises at least one surfactant.

15. The filler compound of claim 1 wherein the water is present in a water phase that exhibits a pH of at least about 5.5.

16. The filler compound of claim 15 wherein the positively charged polymer further comprises about 0.1 wt. % to about 5 wt. % of monomer units of (meth)acrylic acid and wherein at least some of the (meth)acrylic acid monomer units are in the form of carboxylate salts.

17. The filler compound of claim 1 wherein the at least one filler additive is chosen from the group consisting of inorganic particulate additives, organic particulate additives, and combinations thereof.

18. The filler compound of claim 1 wherein the at least one filler additive comprises at least one synthetic inorganic particulate additive chosen from the group consisting of glass bubbles, ceramic microspheres, recycled glass powders, and combinations thereof.

19. The filler compound of claim 1 wherein the at least one filler additive includes wood flour present at about 0.1 wt. % to about 1.5 wt. % of the filler compound.

20. The filler compound of claim 1 wherein the filler compound is substantially free of wood flour.

21. The filler compound of claim 1 wherein the filler compound contains less than about 0.2 wt. % of a hydrophilic organic polymeric thickener.

22. The filler compound of claim 1 wherein the filler compound comprises from about 0.1 wt. % to about 0.5 wt. % of a coalescing aid, based on the total weight of the filler compound.

23. The filler compound of claim 1 wherein the filler compound comprises:
about 5 wt. % to about 30 wt. % positively charged polymer;
about 5 wt. % to about 30 wt. % OH-functional acrylic binder;
about 5 wt. % to about 50 wt. % inorganic particulate filler additive;
about 0.8 wt. % to about 1.5 wt. % wood flour filler additive;
about 0.6 wt. % to about 2.0 wt. % fibrillated polymeric fibers;
and,
about 0.2 wt. % to about 0.8 wt. % glycol ether coalescing agent.

24. A method of filling at least a portion of a cavity in a surface, the method comprising:
filling at least a portion of the cavity with the filler compound of claim 1 ;
and,
allowing the filler compound to dry.

25. The method of claim 24 further comprising sanding an exposed surface of the dried filler compound.

26. The method of claim 24 wherein the surface is a wood surface and wherein the method further comprises the step of staining an exposed surface of the dried filler compound with a wood stain.

27. The method of claim 26 wherein the method further comprises staining an exposed area of the wood surface with the wood stain, and wherein, after the wood stain has dried, the stained surface of the dried filler compound and the stained wood surface exhibit a ΔE* ab value of less than about 8.0.

28. The method of claim 24 wherein the method further comprises the step of mixing a stain with the filler compound before filling the at least portion of the cavity with the filler compound.

Assignees

• 3M Innovative Properties Co

Inventors

• Palaikis Liana V
• Ali Mahfuza B

Classifications

• C08K3/013

  Fillers, pigments or reinforcing additives · CPC title

• C04B2103/0065

  Polymers characterised by their glass transition temperature (Tg) · CPC title

• C09D133/14

  of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen · CPC title

• C08K5/06

  Ethers; Acetals; Ketals; Ortho-esters · CPC title

• C08L1/284

  with hydroxylated hydrocarbon radicals · CPC title