Conveyor lubricant composition having superior compatibility with synthetic plastic containers

A process for lubricating the load bearing surface of a conveyor system comprising the step of coating the load bearing surface of the conveyor system with a sufficient lubricating amount of a conveyor lubricant comprising at least (a) a major proportion of water, and (b) about 50 to 10,000 ppm (w/v) of a fatty acid diamine salt comprising

• (i) a diamine of the formula
• ((R.sup.1)(R.sup.2)NR.sup.5 NH(R.sup.3)(R.sup.4)).sup.+, or
• ((R.sup.1)R.sup.2)NH(R.sup.5)NH(R.sup.3)(R.sup.4)).sup.++ ;
• and
• (ii) at least one fatty acid of the formula (R.sup.6 COO).sup.- ;
• wherein R.sup.1 is a C.sub.10-18 aliphatic group;
• R.sup.2, R.sup.3, and R.sup.4 are independently hydrogen or an alkoxy group containing one to five alkylene oxide units;
• R.sup.5 is a C.sub.1-5 alkylene group;
• and R.sup.6 is a C.sub.10-18 aliphatic group.

A process for lubricating the load bearing surface of a conveyor system comprising the steps of:

• (a) dispersing a concentrate of a lubricating composition into sufficient water to form an aqueous lubricating solution of about 50-10,000 ppm (w/v) fatty acid diamine salt, wherein
• said lubricating concentrate comprises a fatty acid diamine salt comprising,
• (i) a diamine of the formula
• ((R.sup.1)(R.sup.2)N(R.sup.5)NH(R.sup.3)(R.sup.4)).sup.+, or
• ((R.sup.1)(R.sup.2)NH(R.sup.5)NH(R.sup.3)(R.sup.4)).sup.++ ;
• and at least one fatty acid of the formula (R.sup.6 COO).sup.-,
• wherein R.sup.1 is a C.sub.10-18 aliphatic group;
• R.sup.2, r.sup.3, and R.sup.4 are independently hydrogen or an alkoxy group containing one to five alkylene oxide units;
• R.sup.5 is a C.sub.1-5 alkylene group;
• and R.sup.6 is a C.sub.10-18 aliphatic group;
• and
• (b) placing said lubricating solution onto the load bearing surface of an operating conveyor system in an amount and for a period of time effective to lubricate the load bearing surface.

A solid conveyor lubricant concentrate dilutable with an aqueous base to form a use solution which is compatible with synthetic polymeric packaging materials, the concentrate comprising:

• (a) about 5-70 wt-% of a fatty acid diamine salt comprising,
• (i) a diamine of the formula
• ((R.sup.1)(R.sup.2)N(R.sup.5)NH(R.sup.3)(R.sup.4).sup.+, or
• ((R.sup.1)(R.sup.2)NH(R.sup.5)NH(R.sup.3)(R.sup.4).sup.++ ;
• and
• (ii) at least one fatty acid of the formula (R.sup.6 COO).sup.- ;
• wherein R.sup.1 is a C.sub.10-18 aliphatic group;
• R.sup.2, R.sup.3, and R.sup.4 are independently hydrogen or an alkoxy group containing one to five alkylene oxide units;
• R.sup.5 is a C.sub.1-5 alkylene group;
• and R.sup.6 is a C.sub.10-18 aliphatic group;
• and
• (b) an amount of a solidification agent effective for solidifying the concentrated lubricant.