Organic-containing particulate having elevated auto-ignition temperatures

• US 20030060554A1
• Filed: 06/26/2002
• Published: 03/27/2003
• Est. Priority Date: 07/06/2001
• Status: Active Grant

• Current Assignee: Grace GmbH & Co. KG
• Original Assignee: Grace GmbH & Co. KG
• Inventors: Petry, Volker
• Granted Patent: US 8,410,197 B2
• Time in Patent Office: Days
• US Class Current: 524/442
• CPC Class Codes: C01P 2004/32 Spheres
• CPC Class Codes: C01P 2004/61 Micrometer sized, i.e. from 1-100 micrometer
• CPC Class Codes: C01P 2006/12 Surface area
• CPC Class Codes: C01P 2006/14 Pore volume
• CPC Class Codes: C01P 2006/19 Oil-absorption capacity, e.g. DBP values
• CPC Class Codes: C01P 2006/22 Rheological behaviour as dispersion, e.g. viscosity, sedimentation stability
• CPC Class Codes: C01P 2006/80 Compositional purity
• CPC Class Codes: C09C 1/3063 Treatment with low-molecular organic compounds
• CPC Class Codes: C09C 1/3072 Treatment with macro-molecular organic compounds
• CPC Class Codes: C09C 3/08 Treatment with low-molecular-weight non-polymer organic compounds C09C3/006, C09C3/048 take precedence
• CPC Class Codes: C09C 3/10 Treatment with macromolecular organic compounds C09C3/006 takes precedence
• CPC Class Codes: Y10T 428/2993 Silicic or refractory material containing [e.g., tungsten oxide, glass, cement, etc.]
• CPC Class Codes: Y10T 428/2995 Silane, siloxane or silicone coating
• CPC Class Codes: Y10T 428/2996 Glass particles or spheres
• CPC Class Codes: Y10T 428/2998 including synthetic resin or polymer

Abstract

The composition of this invention is an inorganic oxide particulate comprising at least 10% by weight organic material in which the particulate has an auto-ignition temperature which is at least 20° C. higher than the auto-ignition temperature of the particulate and organic material which does not contain antioxidant and/or inhibitor. Accordingly, a method has been developed in which one is able to elevate the auto-ignition temperature of such organic containing particulates. In a preferred embodiment the method comprises including antioxidant or inhibitor in the organic material prior to combining it with the inorganic oxide.

Claims

1. An inorganic oxide particulate comprising at least 10% by weight organic material based on the weight of inorganic oxide wherein the particulate at a given volume has an auto-ignition temperature which is at least 20°

C. higher than the auto-ignition temperature of a base particulate, the base particulate being the particulate and organic material without an antioxidant or inhibitor.

2. A particulate of claim 1 wherein the auto-ignition temperature of the particulate is at least 100°

C.

3. The particulate of claim 1 further comprising antioxidant or inhibitor.

4. A particulate of claim 3 wherein the antioxidant comprises

5. A particulate of claim 3 wherein the antioxidant comprises

6. A particulate of claim 4 further comprising

7. A particulate of claim 1 wherein the inorganic oxide particulate is a member of the group consisting of silica, talc and mineral fillers.

8. A particulate of claim 7 wherein the inorganic oxide is porous and has a pore volume of 0.4 cc/g to 2.0 cc/g.

9. A particulate of claim 8 wherein the porous inorganic oxide is silica.

10. A particulate of claim 1 having an average particle size in the range of 2 to 12 microns.

11. A particulate of claim 1 comprising 10 to 50% by weight organic material.

12. A particulate of claim 1 comprising at least 20% by weight organic material.

18. A method of claim 1 wherein the inorganic oxide is silica.

19. A method of claim 1 wherein the inorganic oxide is silica particulate.

13. A method of elevating auto-ignition temperatures of inorganic oxide containing at least 10% by weight organic material based on the weight of inorganic oxide, the method comprising including anti-oxidant or inhibitor with the organic material-containing inorganic oxide.

14. A method of claim 13 wherein the antioxidant comprises a compound

15. A method of claim 13 wherein the antioxidant comprises

16. A method of claim 14 in which the antioxidant further comprises

17. A method of claim 13 comprising including the antioxidant and/or inhibitor in the organic material prior to combining the organic material with the inorganic oxide.