Wool Development International Limited

Ladislav Benisek

Penelope C Craven

Gerald K Edmondson

A filter for noxious gases such as sulphur dioxide or nitrogen dioxide comprises a keratinous fibre substrate within which is deposited an effective amount of manganese dioxide. The fibres, preferably sheep's wool, may be in the form of a fibrous bat and the manganese dioxide is deposited from acidified permanganate solution. The filter is most effective when maintained in the wet state.

Gas filter

A method finishing keratinous textile articles, for example wool fabrics, which comprises treating the articles with an anti-felt polymer for example isocyanate functional or bunte salt functional polymers, and a polymer of chlorinated ethylenically unsaturated monomer, for example polyvinyl chloride, polyvinylidene chloride, polypropylene, and dichlorobutadiene. Thereafter, the articles are treated with an anionic titanium or zirconium complex at low pH. Textiles so treated exhibit both shrink-resistant and flame-retardant properties.

Textile finishing of keratinous articles

A method of finishing keratinous textile fabrics is disclosed which comprises treating the fabrics with an anionic titanium or zirconium complex at a pH in the range 1 to 4, and with a halogen containing organic acid or anhydride soluble in hot water, but preferably virtually insoluble in cold water. Such a treatment enables wool furnishing fabrics to meet the very stringent National Fire Protection Association standard 701-1969.

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Burley-in-Wharfedale, United Kingdom

Ladislav Benisek