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US 4,215,205 AGranted
Fluoroaliphatic radical and carbodiimide containing compositions for fabric treatment
AssigneeMinnesota Mining and Manufacturing Company
InventorDennis P. Landucci
Life of this patent
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Abstract
Durably launderable and dry-cleanable repellency to water and oil is conferred on fabrics consisting essentially completely of hydrophobic synthetic fibers by application of a blend of a fluoroaliphatic vinyl polymer and a carbodiimide, preferably comprising fluoroaliphatic groups.
Claims1
A blend in volatile aqueous or non-aqueous medium of a total of at least 0.3% by weight of
- (A) fluoroaliphatic radical-containing substantially linear vinyl polymer containing from 10 to 60 percent by weight thereof of fluorine in the form of fluoroaliphatic radicals terminating in CF.sub.3 radicals, said fluoroaliphatic radicals containing at least three fully fluorinated carbon atoms, and
- (B) a carbodiimide consisting essentially of from 1 to a plurality of carbodiimide groups, terminal organic radicals free from isocyanate-reactive hydrogen atoms connected to carbodiimide and, when two or more carbodiimide groups are present, polyvalent organic linking groups, which are residues of polyisocyanates, between successive carbodiimide groups;
- the ratio A to B respectively being from about 10:90 to 95:5.
Dependencies are inferred from the claim text.