Mild-cure formaldehyde-free durable-press finishing of cotton textiles with glyoxal and glycols
CA 1205607 A · Owner: The United States Of America, Represented By The Secretary, U.S. Departm Ent Of Commerce · Inventors: Welch, Clark M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The use of glycols as coreactive additives with glyoxal in the aluminum sulfate-catalyzed crosslinking cotton cellulose in the presence of alpha-hydroxy acids as catalyst activators at moderate curing temperatures is disclosed. The cotton textiles so treated are free from the discoloration and excessive tendering produced by glyoxal in the presence of metal salt catalysts at high temperature, are non-nitrogenous and formaldehydefree, and exhibit high levels of wrinkle resistance and smooth drying properties without the formaldehyde release characteristic of N-methylolamide finishing agents.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted June 10, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 10, 2003.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.