The present invention relates to a method of washing animal fibers comprising contacting the animal fibers with a surfactant composition comprising a mixture of alcohol ethoxylate surfactants and optionally at least one propoxylated surfactant.

The present invention discloses styrene butadiene rubber (SBR) composition containing the by-products based on renewable source such as calcium salt of lanolin fatty acid (CA), magnesium salt of lanolin fatty acids, pretreated calcium salt of lanolin fatty, lanolin fatty acids like crude (CLFA) and bleached lanolin fatty acids (BLFA) and process thereof.