Buffer for the alkaline dyeing process of polyester
PERIGEN DPA liq. is used for dyeings of polyester and blends with disperse dyestuffs in the alkaline medium.
PERIGEN DPA liq. is an organic buffer for alkaline dyeing of polyester. With PERIGEN DPA liq. an initial pH value of approx. 9.5 is set. During dyeing the pH value is reduced to approx. 8.5.
Polyester oligomers are successfully saponified, precipitations of oligomers are reduced significantly.
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