Metal working lubricant
AssigneeCoral Chemical Company
InventorsGerald H. Kyle, Patrick W. C. Morrison
Life of this patent
Estimating the term…
Abstract
A solid lubricating and coating composition for metal working which composition is suitable for the addition to water for the formation of an aqueous lubricating and coating composition which aqueous composition when dried will form a hard lubricating film on a substrate, such that film will provide lubricity but residues of film will not buildup on metal working tools and dies. The solid composition includes a solid alkali metal salt of a saturated monocarboxylic acid having from about 12 to 30 carbon atoms; polyethylene glycol or a polyoxyethylene glycol having a molecular weight in the range of from about 1500 to about 8000; an acrylic polymer and an effective amount of a surface active agents to effect low hygroscopicity and complete mixing of the ingredients in water.
Claims29
A solid lubricating and coating composition for a metal workpiece which composition is suitable for addition to water for the formation of an aqueous lubricating and coating composition which upon application to the workpiece and drying will provide a borate free hard lubricating coating, the solid composition comprising:
- from about 55 to about 80 percent by weight of a solid alkali metal salt of a saturated fatty monocarboxylic acid having from about 12 to about 30 carbon atoms which may be in a chain or branched which salt has a melting point from about 105.degree. to about 150.degree. F.;
- from about 4.5 to about 18 percent by weight of a solid polyethylene polymer selected from the group consisting of polyethylene glycol, methoxy polyethylene glycol, polyoxyethylene alcohol or mixtures thereof, the polyethylene polymer having a molecular weight in the range of from about 1500 to about 8000;
- an effective amount of an acrylic polymer having a molecular weight in the range of from about 150 to about 1700 to accelerate drying and effect hardening of the aqueous composition upon the workpiece;
- from about 2.5 to about 7.5 percent by weight of a low hydrophilic-lipophilic balance surface active agent to effect hardness and low hygroscopicity to the coating;
- and
- an effective amount of a dispersing surface active agent to effect complete mixing of the alkali metal salt, polyethylene polymer, acrylic polymer and low hydrophilic-lipophilic balance surface active agent in water to provide an aqueous lubricating and coating composition which will form a borate free, hard lubricating coating.
An aqueous lubricating and coating composition for a metal workpiece which upon application to the workpiece will provide a borate free, hard lubricating coating, the aqueous composition comprising:
- from about 50 to about 94 percent by weight water;
- and
- from about 6 to about 50 percent by weight of solid lubricant dispersed in the water, the solid lubricant including
- from about 55 to about 80 percent by weight of a solid alkali metal salt of a saturated fatty monocarboxylic acid having from about 12 to about 30 carbon atoms which may be in a chain or branched which salt has a melting point from about 105.degree. to about 150.degree. F.;
- from about 4.5 to about 18 percent by weight of a solid polyethylene polymer selected from the group consisting of polyethylene glycol, methoxy polyethylene glycol, polyoxyethylene alcohol or mixtures thereof, the polyethylene polymer having a molecular weight in the range of from about 1500 to about 8000;
- an effective amount of an acrylic polymer having a molecular weight in the range of from about 150 to about 1700 to accelerate drying and effect hardening of the aqueous composition upon the workpiece;
- from about 2.5 to about 7.5 percent by weight of a low hydrophilic-lipophilic balance surface active agent to effect hardness and low hygroscopicity to the coating;
- and
- an effective amount of a dispersing surface active agent to effect complete mixing of the alkali metal salt, polyethylene polymer, acrylic polymer and low hydrophilic-lipophilic balance and surface active agent in water to provide an aqueous lubricating and coating composition which will form a borate free, hard lubricating coating.
A method of lubricating and coating a workpiece comprising:
- coating the workpiece with an aqueous solution which includes
- from about 50 to about 94 percent by weight water;
- from about 6 to about 50 percent by weight of solid lubricant dispersed in the water, the solid lubricant including
- from about 55 to about 80 percent by weight of a solid alkali metal salt of a saturated fatty monocarboxylic acid having from about 12 to about 30 carbon atoms which may be in a chain or branched which salt has a melting point from about 105.degree. to about 150.degree. F.;
- from about 4.5 to about 18 percent by weight of a solid polyethylene polymer selected from the group consisting of polyethylene glycol, methoxy polyethylene glycol, polyoxyethylene alcohol or mixtures thereof, the polyethylene polymer having a molecular weight in the range of from about 1500 to about 8000;
- an effective amount of an acrylic polymer having a molecular weight in the range of from about 150 to about 1700 to accelerate drying and effect hardening of the aqueous composition upon the workpiece;
- from about 2.5 to about 7.5 percent by weight of a low hydrophilic-lipophilic balance surface active agent to effect hardness and low hygroscopicity to the coating;
- and
- an effective amount of a dispersing surface active agent to effect complete mixing of the alkali metal salt, polyethylene polymer, acrylic polymer and low hydrophilic-lipophilic balance and surface active agent in water;
- and drying the coating to provide a coated lubricated workpiece.
Dependencies are inferred from the claim text.