Composición de cera de marcaje renovable y biodegradable

Una composición de marcaje que comprende: un polímero de condensación que es un producto de reacción de un diol y un ácido dicarboxílico, en una cantidad de aproximadamente 10% a aproximadamente 90% en peso de la composición; uno o más ácidos grasos que contienen de 10 a 24 átomos de carbono, o un éster de los mismos, en una cantidad de aproximadamente 20% a aproximadamente 80% en peso de la composición; y un colorante, en una cantidad de aproximadamente 1% a aproximadamente 15% en peso de la composición; en donde el polímero tiene un valor de dureza Shore D de 35 a 65. The present disclosure is directed to marking compositions that are derived from environmentally friendly, biodegradable, and sustainable resources. Such compositions may be formulated in to writing and/or drawing instruments such as crayons. In various embodiments, the marking compositions include one or more of a structural component, a stiffening and/or laydown component, and a colorant. For instance, the structural component may be an ester wax composed of a diol and diacid, such as where the diols and diacids contain about 2 to about 14 carbon atoms each, such as where the structural component is present in an amount of from about 10% by weight to about 90% by weight, such as about 20% to about 80%, including about 60% of the composition. Additionally, the stiffening and/or lay down component may be a bifunctional fatty acid, such as stearic acid, which may be included in the composition, such as a stiffening agent as well as to enhance smoothness of laydown. A typically useful amount that may be used ranges from about 20% or less to about 80% or more, such as about 40% to 60% or more by weight of the composition. Further, in various embodiments, a naturally occurring, organic colorant may be provided as part of the marking composition.