Lubricant combinations
A lubricant composition for thermoplastic processing including at least one natural fat and/or oil with an iodine value below 10 and at least one lubricant different from the natural fat and/or oil is provided. A method for processing thermoplastics including incorporating into a thermoplastic polymer a lubricant composition including at least one natural fat and/or oil with an iodine value below 10 and at least one lubricant different from the natural fat and/or oil, and processing the thermoplastic polymer is also provided.
1. A composition, comprising
A) a thermoplastic polymer selected from polyvinyl chloride, polyamide, polycarbonate, or acrylonitrile butadiene styrene; and
B) a lubricant composition consisting essentially of:
(a) a first component selected from natural coconut oil or a hydrogenated tallow with an iodine value below 10; and
(b) a second component selected from a fatty acid ester of fatty alcohols, dicarboxylic acid esters of fatty alcohols, or a polyol fatty acid ester including wax esters.
2. The composition according to claim 1 , wherein the natural coconut oil or a hydrogenated tallow have iodine values below 8.
3. The composition according to claim 1 , wherein the natural coconut oil or a hydrogenated tallow have iodine values between about 0.1 and about 5.
4. The composition according to claim 1 , wherein components (a) and (b) are present in a ratio by weight of 20:80 to 80:20.
5. The composition according to claim 1 , wherein components (a) and (b) are present in a ratio by weight of 40:60 to 60:40.
6. The composition according to claim 1 , wherein component (b) comprises stearyl stearate.
7. The composition according to claim 1 , wherein component (b) comprises distearyl phthalate.
8. The composition according to claim 1 , wherein component (b) comprises pentaerythritol tetrastearate.
9. The composition according to claim 1 , wherein component (b) comprises dipentaerythritol hexastearate.
10. The composition according to claim 1 , wherein component (a) comprises hydrogenated tallow.
11. The composition according to claim 4 , wherein component (a) comprises hydrogenated tallow.
12. A method for processing thermoplastics, comprising the steps of:
(i) incorporating into a thermoplastic polymer a composition consisting essentially of (a) a first component selected from natural coconut oil or a hydrogenated tallow with an iodine value below 10 and (b) one lubricant selected from fatty acid ester of fatty alcohols, dicarboxylic acid esters of fatty alcohols, or a polyol fatty acid ester including wax esters; and
(ii) processing the thermoplastic polymer
wherein the thermoplastic polymer is selected from polyvinyl chloride, polyamide, polycarbonate, or acrylonitrile butadiene styrene.
13. The method according to claim 12 , wherein components (a) and (b) are present in a ratio by weight of 20:80 to 80:20.
14. The method according to claim 12 , wherein component (a) includes hydrogenated tallow.
15. The method according to claim 12 wherein the natural fats and oils having iodine numbers below 10 are blended and melted together with the further lubricant prior to incorporation into the thermoplastic polymer.
16. The method according to claim 12 wherein the incorporation into the thermoplastic polymer takes place by means of spray crystallization.
17. The method according to claim 12 wherein the lubricant composition is added in an amount of from about 0.01 to about 10 parts by weight to 100 parts by weight of the thermoplastic polymer to be processed.
18. The method according to claim 12 wherein the lubricant composition is
(a) added to the melt that is formed during the preparation of the thermoplastic polymer; or
(b) applied to the plastics material granules or plastics material powder at an elevated temperature.