MINERAL TANNED LEATHER TREATED WITH DIALDEHYDE STARCH AND BENZENE POLYCARBOXYLIC ACID COMPOSITIONS

摘要

Mineral tanned leather is stabilized against degradation due to warm or hot alkaline washings by applying thereto during tanning or retanning an aqueous solution of from about 5 parts to about 1 part dialdehyde starch and from about 1 part to about 5 parts of a benzene polycarboxylic acid or alkali metal salt thereof based on the weight of the leather. A 5 percent solution based on the weight of the hide of a 1:1 composition of dialdehyde starch and sodium isophthalate is preferred.