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Polycarbamoyl Sulphonates: Water‐soluble Shrink‐resist Polymers for Wool
Author(s) -
GUISE G. BRUCE,
RUSHFORTH MICHAEL A.
Publication year - 1976
Publication title -
journal of the society of dyers and colourists
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 0037-9859
DOI - 10.1111/j.1478-4408.1976.tb03291.x
Subject(s) - wool , curing (chemistry) , polymer , polybutadiene , chemistry , polyester , polymer chemistry , degradation (telecommunications) , adduct , salt (chemistry) , chemical engineering , materials science , organic chemistry , composite material , copolymer , telecommunications , computer science , engineering
Water‐soluble polymers suitable for shrink‐resisting wool fabric by a pad–dry sequence can be prepared by the reaction of polyisocyanates with bisulphite salts. This paper examines the relationship between polymer structure and textile properties in these bisulphite adducts, or polycarbamoyl sulphonates (PCS). The reaction of various polyisocyanates with sodium bisulphite was examined. PCS could be prepared only from polyisocyanates with polyether backbones but not from those with polyester, polybutadiene or polycaprolactone backbones. Stable PCS were obtained from aliphatic isocyanates but those from aromatic isocyanates were relatively unstable. The PCS shrink‐resisted wool fabric and behaved similarly to the parent polyisocyanates on wool. The polyureas formed on curing were somewhat susceptible to thermal and photo‐oxidative degradation but this was improved to an acceptable level by the addition of hindered phenolic antioxidants.