Use of surface modified calcium carbonate in adhesives, sealants and/or caulks

Patent metadata

Field	Value
Publication number	US-9012554-B2
Application number	US-201113638018-A
Country	US
Kind code	B2
Filing date	Apr 5, 2011
Priority date	Apr 9, 2010
Publication date	Apr 21, 2015
Grant date	Apr 21, 2015

Abstract

The present invention relates to the use of surface modified calcium carbonate as a filler in adhesives, sealants, and/or caulks, wherein the surface modified calcium carbonate is a mineral pigment product formed in situ by the double and/or multiple reaction between a calcium carbonate and the reaction product or products of the said carbonate with gaseous CO 2 formed in situ and/or coming from an external supply, and the reaction product or products of the said carbonate with one or more moderately strong to strong H 3 O + ion donors, and at least one aluminum silicate and/or at least one synthetic silica and/or at least one calcium silicate and/or at least one silicate of a monovalent salt and/or at least one aluminum hydroxide and/or at least one sodium and/or potassium aluminate. It further relates to method of producing adhesives, sealants, and/or caulks comprising surface modified calcium carbonate, as well as to the adhesives, sealants, and/or caulks obtained by this process.

First claim

The invention claimed is:

1. An adhesive, sealant or caulk comprising surface modified calcium carbonate as a filler, wherein the surface modified calcium carbonate is a mineral pigment product formed in situ by the double and/or multiple reaction between a calcium carbonate and the reaction product or products of the carbonate with gaseous CO 2 formed in situ and/or coming from an external supply, and the reaction product or products of the carbonate with one or more moderately strong to strong H 3 O + ion donors, and at least one aluminium silicate and/or at least one synthetic silica and/or at least one calcium silicate and/or at least one silicate of a monovalent salt and/or at least one aluminium hydroxide and/or at least one sodium and/or potassium aluminate.

2. The adhesive, sealant or caulk according to claim 1 , wherein the silicate of a monovalent salt is sodium silicate, potassium silicate, or lithium silicate.

3. The adhesive, sealant or caulk according to claim 1 , wherein the calcium carbonate is natural ground calcium carbonate, precipitated calcium carbonate, or a mixture of natural ground calcium carbonate with one or more of talc, kaolin, titanium dioxide, magnesium oxide or any mineral that is inert to treatment with a moderately strong to strong H 3 O + ion donors.

4. The adhesive, sealant or caulk according to claim 1 , wherein the calcium carbonate comprises marble, calcite, chalk, dolomite or any mixture thereof

5. The adhesive, sealant or caulk according to claim 1 , wherein the strong H 3 O + ion donors are strong acids or any mixture thereof generating H 3 O + ions, acids having a pK a of less than or equal to zero at 22° C., sulphuric acid, hydrochloric acid or any mixture thereof, and the moderately strong H 3 O + ion donors are acids having a pK a of from 0 to 2.5 at 22° C., H 2 SO 3 , HSO 4 − , H 3 PO 4 , oxalic acid or any mixture thereof, acids forming bivalent cation salts, or acids forming calcium salts.

6. The adhesive, sealant or caulk according to claim 1 , wherein the surface modified calcium carbonate has a BET specific surface area of 25 m 2 /g to 200 m 2 /g measured according to ISO 9277.

7. The adhesive, sealant or caulk according to claim 1 , wherein the surface modified calcium carbonate has a BET specific surface area of 30 m 2 /g to 80 m 2 /g measured according to ISO 9277.

8. The adhesive, sealant or caulk according to claim 1 , wherein the surface modified calcium carbonate has a BET specific surface area of 35 m 2 /g to 60 m 2 /g measured according to ISO 9277.

9. The adhesive, sealant or caulk according to claim 1 , wherein the surface modified calcium carbonate has a volume median particle diameter d 50 of from 0.1 to 50 μm.

10. The adhesive, sealant or caulk according to claim 1 , wherein the surface modified calcium carbonate has a volume median particle diameter d 50 of from 1 to 10 μm.

11. The adhesive, sealant or caulk according to claim 1 , wherein the surface modified calcium carbonate has a volume median particle diameter d 50 of from 1.5 to 5 μm.

12. The adhesive, sealant or caulk according to claim 1 , wherein the surface modified calcium carbonate is in a dry form or in a form of an aqueous suspension having a pH greater than 7.5 measured at 20° C.

13. The adhesive, sealant or caulk according to claim 1 , wherein the surface modified calcium carbonate comprises a cationic, an anionic, and/or a weakly anionic electrolyte.

14. The adhesive, sealant or caulk according to claim 1 , which comprises one or more of acrylic, polyurethane, polysulfide, silyl-terminated polyether or polyurethane, silicone, or silicone modified resins or binders.

15. The adhesive, sealant or caulk according to claim 1 , which is water-based, solvent-based or does not contain any solvent.

16. The adhesive, sealant or caulk according to claim 1 , which comprises one or more of binders, rubber, adhesion promoters, pigments and fillers.

17. The adhesive, sealant or caulk according to claim 1 , wherein the surface modified calcium carbonate is the only filler or is used in combination with one or more additional fillers.

18. The adhesive, sealant or caulk according to claim 1 , wherein the surface modified calcium carbonate accounts for 5 to 100 wt % of the total filler amount.

19. The adhesive, sealant or caulk according to claim 1 , wherein the surface modified calcium carbonate accounts for 10 to 40 wt % of the total filler amount.

20. The adhesive, sealant or caulk according to claim 1 , wherein the surface modified calcium carbonate accounts for 20 to 30 wt % of the total filler amount.

21. A method of producing an adhesives, sealant or caulk comprising the steps of:
a) providing an adhesive, sealant or caulk formulation,
b) providing surface modified calcium carbonate, wherein the surface modified calcium carbonate is a mineral pigment product formed in situ by the double and/or multiple reaction between a calcium carbonate and the reaction product or products of the carbonate with gaseous CO 2 formed in situ and/or coming from an external supply, and the reaction product or products of the carbonate with one or more moderately strong to strong H 3 O + ion donors, and at least one aluminium silicate and/or at least one synthetic silica and/or at least one calcium silicate and/or at least one silicate of a monovalent salt and/or at least one aluminium hydroxide and/or at least one sodium and/or potassium aluminate, and
c) combining the surface modified calcium carbonate with the adhesive, sealant or caulk formulation.

22. An adhesive, sealant or caulk obtained by the method of claim 21 .

Assignees

• Saunders George
• Mcjunkins Joseph
• Buri Matthias
• Gane Patrick A C
• Omya Int Ag

Inventors

• Saunders George
• Mcjunkins Joseph
• Buri Matthias
• Gane Patrick A C

Classifications

• C01P2006/12

  Surface area · CPC title

• C09J11/04 Primary

  inorganic · CPC title

• C01P2004/62

  Submicrometer sized, i.e. from 0.1-1 micrometer · CPC title

• C09C1/022 Primary

  Treatment with inorganic compounds · CPC title

• C01P2004/61

  Micrometer sized, i.e. from 1-100 micrometer · CPC title