Word Origin and History for pigment Expand. n. late 14c., from Latin pigmentum coloring matter, pigment, paint, figuratively prnament, from stem of pingere to color, paint (see paint (v.)). Variants of this word could have been known in Old English (e.g. 12c. pyhmentum). As a verb from 1900.
Vegetable oils are oils that have been extracted from various seeds. The most common include rapeseed (canola oil), soybean, corn, sunflower, safflower, peanut, etc. Unlike coconut oil or olive oil that can be extracted by pressing, these new-fangled oils have to be extracted in very unnatural ways.
Castor oil is one of the major natural vegetable oils that. contain a hydroxyl group and so it is widely used in many chemical industries, especially in the production of PUs [10, 11]. The synthesis of PU nanocomposites is. prepared from natural oil, like castor oil, using HMDI and organically modified clay.