Microcrystalline wax coating composition

• US 5,294,251 A
• Filed: 05/08/1992
• Issued: 03/15/1994
• Est. Priority Date: 05/08/1992
• Status: Expired due to Term

• Current Assignee: Myriad Utile, Inc.
• Original Assignee: Myriad Utile, Inc.
• Inventors: Urena, Francisco A. J.
• Primary Examiner(s): BRUNSMAN, DAVID M
• Application Number:
  US07/879,912
• Time in Patent Office: 676 Days
• Field of Search: 106/271, 106/38.25
• US Class Current: 106/271
• CPC Class Codes: C09D 191/08 Mineral waxes

Abstract

A coating composition having corrosion inhibiting properties, electrical insulating properties, mold release properties and waterproofing properties comprises a dispersion of microcrystalline paraffin wax in a solvent. The coating composition is prepared by heating the microcrystalline wax to about 70° C. to 82° C. and rapidly pouring the wax into a mixture of hexane and xylene at room temperature.

Claims

1. A liquid coating composition prepared by a process comprising the steps of:

heating microcrystalline paraffin wax above the melting point of said wax; and

admixing said microcrystalline paraffin wax with a solvent substantially at room temperature and dispersing said microcrystalline wax, said solvent consisting essentially of a mixture of a liquid aliphatic hydrocarbon and a xylene, said coating composition being stable without separation or solidification of said microcrystalline wax.

2. The composition according to claim 1 wherein said microcrystalline paraffin wax is heated to about 70°

C. to 82°

C. before admixing with said solvent.

3. The composition according to claim 1 wherein said solvent is continuously mixed while admixing with said microcrystalline paraffin wax.

4. The composition according to claim 1 wherein said solvent consists essentially of hexane and xylene.

5. The composition according to claim 4 wherein solvent consists essentially of about 70 to 95 parts by weight hexane and about 5 to 30 parts by weight xylene.

6. The composition according to claim 1 comprising about 3 to about 20 parts by weight microcrystalline paraffin wax.

7. A process of producing a coating composition comprising:

heating microcrystalline paraffin wax above its melting point; and

admixing said melted microcrystalline paraffin wax with a solvent substantially at room temperature and dispersing said microcrystalline wax, said solvent consisting essentially of a mixture of an aliphatic solvent and at least one aromatic solvent to form said composition.

8. The process according to claim 7 further comprising heating said microcrystalline paraffin wax to a temperature of at least 70°

C. prior to admixing with said solvent.

9. The process according to claim 7 further comprising heating said microcrystalline paraffin wax to a temperature of about 77°

C. to 82°

C.

10. The process according to claim 7 wherein said aliphatic solvent is a C_6-12 alkane.

11. The process according to claim 7 wherein said aliphatic solvent is n-hexane.

12. The process according to claim 7 wherein said aromatic solvent is selected from the group consisting of benzene, toluene, xylene and trimethyl benzene.

13. The process according to claim 7 wherein said aromatic solvent is xylene.

14. The process according to claim 7, said solvent comprising about 70 to 95 parts by weight aliphatic hydrocarbon and about 5 to 30 parts by weight of a aromatic hydrocarbon.

15. The process according to claim 7 comprising admixing said microcrystalline paraffin wax with said solvent in the amount of about 3 to about 20 parts by weight.

16. The process according to claim 7 comprising admixing said microcrystalline paraffin wax with said solvent in the amount of 5 to about 15 parts by weight.

17. A liquid coating composition prepared by the process consisting essentially of:

heating about 3 to 20 parts by weight microcrystalline paraffin wax to about 70°

C. to 85°

C.; and

admixing said microcrystalline wax with a solvent substantially at room temperature and dispersing said microcrystalline wax, said solvent consisting essentially of about 70 to 95 parts by weight of hexane and about 5 to 30 parts by weight xylene.

18. A liquid coating composition, consisting essentially of:

microcrystalline paraffin wax; and

solvent consisting essentially of a mixture of hexane and xylene;

said composition being stable at room temperature without separation or solidification.