Claims
- 1. A release agent comprising:
a) an alkali metal salt of a tall oil fatty acid which contains less than 10 wt %, based on the total weight of said tall oil fatty acid, of unsaponifiable impurities and less than 1 wt % of rosin acid, based on the total weight of said tall oil fatty acid;
wherein said tall oil fatty acid has an acid number of 192 or more and a color Gardner value of 5 or less, and b) an aqueous liquid carrier.
- 2. A release agent as in claim 1 wherein said alkali metal salt of a tall oil fatty acid is a potassium salt.
- 3. A release agent as in claim 2 wherein the tall oil fatty acid has less than 1 wt % pitch.
- 4. A release agent as in claim 2 wherein the tall oil fatty acid has less than 2.2 wt % rosin.
- 5. A release agent as in claim 4 wherein the tall oil fatty acid has an acid number greater than 194 and a color Gardner value of less than 4.5.
- 6. A release agent as in claim 1 which contains an additional additive to enhance the release properties selected from oils, waxes, polishes, metallic salts, silicones and polytetrafluoroethylene.
- 7. A release agent as in claim 6 wherein the additive to enhance the release properties is a vegetable oil.
- 8. A release agent as in claim 7 wherein the vegetable oil is castor oil.
- 9. A release agent as in claim 1 which contains an additional additive selected from preservatives, biocides, anti-foaming agents, anticorrosive agents, surfactants and flame retardants.
- 10. A release agent as in claim 9 which contains as an anticorrosive agent, compounds that bind dissolved oxygen within the aqueous carrier, compounds that neutralize carbonic acid in the release agent, compounds that provide a protective coating on steel or combinations thereof.
- 11. A release agent as claim 10 which contains an anticorrosive agent that binds dissolved oxygen within the aqueous carrier.
- 12. A release agent as claim 11 wherein the anticorrosive agent is DEHA.
- 13. A release agent as in claim 1 which provides release properties to lignocellulosic materials on metal at levels from 0.1-1.0 milligrams of solids/cm2 of surface area.
- 14. A release agent which comprises:
a) an alkali metal salt of a tall oil fatty acid which contains less than 10 wt %, based on the total weight of said tall oil fatty acids, of unsaponifiable impurities; b) a synthetic wax; and c) an aqueous liquid carrier.
- 15. A release agent as in claim 14 which contains less than 1 wt % of rosin acid, based on the total weight of said tall oil fatty acid; and said tall oil fatty acid has an acid number of 192 or more and a color Gardner value of 5 or less.
- 16. A release agent as in claim 15 wherein said alkali metal salt of a tall oil fatty acid is a potassium salt.
- 17. A release agent as in claim 16 wherein the tall oil fatty acid has less than 1 wt % pitch.
- 18. A release agent as in claim 16 wherein the tall oil fatty acid has less than 2.2 wt % rosin.
- 19. A release agent as in claim 18 wherein the tall oil fatty acid has an acid number greater than 194 and a color Gardner value of less than 4.5.
- 20. A release agent as in claim 14 wherein the synthetic wax is polyethylene glycol or ethylene bisstearamide.
- 21. A release agent as in claim 16 wherein the synthetic wax is polyethylene glycol or ethylene bisstearamide.
- 22. A release agent as in claim 14 which additionally comprises an emulsifier for said synthetic wax.
- 23. A release agent as in claim 16 which contains an additional additive to enhance the release properties selected from oils, natural waxes, polyethylene wax, polishes, metallic salts, silicones and polytetrafluoroethylene.
- 24. A release agent as in claim 23 wherein the additive to enhance the release properties is a vegetable oil.
- 25. A release agent as in claim 24 wherein the vegetable oil is castor oil.
- 26. A release agent as in claim 16 which contains an additional additive selected from preservatives, biocides, anti-foaming agents, anticorrosive agents, surfactants and flame retardants.
- 27. A release agent as in claim 26 which contains as an anticorrosive agent, a compound that binds dissolved oxygen within the aqueous carrier, a compound that neutralize carbonic acid in the release agent, a compound that provides a protective coating on steel or a combination thereof.
- 28. A release agent as claim 27 which contains an anticorrosive agent that binds dissolved oxygen within the aqueous carrier.
- 29. A release agent as claim 28 wherein the anticorrosive agent is DEHA.
- 30. A release agent as in claim 16 which provides release properties to lignocellulosic materials on metal at levels from 0.1-1.0 milligrams of solids/cm2of surface area.
- 31. A release agent as in claim 16 which has a memory of three hours and above.
- 32. A release agent which comprises:
a) an alkali metal salt of a tall oil fatty acid which contains less than 10 wt %, based on the total weight of said tall oil fatty acids, of unsaponifiable impurities; b) a silicone resin; and c) an aqueous liquid carrier.
- 33. A release agent as in claim 32 which contains less than 1 wt % of rosin acid, based on the total weight of said tall oil fatty acid; and said tall oil fatty acid has an acid number of 192 or more and a color Gardner value of 5 or less and wherein the silicone resin is polydimethylsiloxane.
- 34. A release agent as in claim 33 wherein said alkali metal salt of a tall oil fatty acid is a potassium salt and the tall oil fatty acid has less than 1 wt % pitch, less than 2.2 wt % rosin, an acid number greater than 194 and a color Gardner value of less than 4.5.
- 35. A release agent as in claim 34 which contains an additional additive to enhance the release properties selected from oils, natural waxes, polyethylene wax, polishes, metallic salts, silicones and polytetrafluoroethylene.
- 36. A release agent as in claim 35 wherein the additive to enhance the release properties is castor oil.
- 37. A release agent as in claim 34 which contains an additional additive selected from preservatives, biocides, anti-foaming agents, corrosion inhibitors, surfactants and flame retardants.
- 38. A release agent as in claim 37 which contains as a corrosion inhibitor, a compound that binds dissolved oxygen within the aqueous carrier, a compound that neutralize carbonic acid in the release agent, a compound that provides a protective coating on steel or a combination thereof.
- 39. A release agent as claim 38 which contains a corrosion inhibitor that binds dissolved oxygen within the aqueous carrier.
- 40. A release agent as claim 39 wherein the corrosion inhibitor is DEHA.
- 41. A release agent as in claim 34 which provides release properties to lignocellulosic materials on metal at levels from 0.1-1.0 milligrams of solids/cm2 of surface area.
- 42. A release agent as in claim 34 which has a memory of three hours and above.
- 43. A method of using the release agent of claim 1 comprising applying said release agent to the surface of a mold or platen.
- 44. A method of using the release agent of claim 14 comprising applying said release agent to the surface of a mold or platen.
- 45. A method of using the release agent of claim 32 comprising applying said release agent to the surface of a mold or platen.
- 46. A method for the manufacture of molded articles comprising:
applying to a mold surface, a release agent of claim 1; and molding lignocellulosic material or concrete or polyurethane foam in said mold.
- 47. A method for the manufacture of a molded article comprising:
applying to a mold surface, a release agent of claim 14; and molding lignocellulosic material or concrete or polyurethane foam in said mold.
- 48. A method for the manufacture of a molded article comprising:
applying to a mold surface, a release agent of claim 32; and molding lignocellulosic material or concrete or polyurethane foam in said mold.
RELATED APPLICATIONS
[0001] This application claims the benefit of U.S. provisional application Serial No. 60/359,379 filed Feb. 26, 2002 and U.S. provisional application Serial No. 60/358,378 filed Feb. 22, 2002.
Provisional Applications (2)
|
Number |
Date |
Country |
|
60359379 |
Feb 2002 |
US |
|
60358378 |
Feb 2002 |
US |