Compositions – Leather or fur treating
Patent
1974-06-03
1976-06-01
Guynn, Herbert B.
Compositions
Leather or fur treating
166275, 166283, 166308, 252 85C, 252326, E21B 4326
Patent
active
039607364
ABSTRACT:
Viscous aqueous solutions are prepared which maintain a certain viscosity range over a predetermined period of time (i.e., induction period) and which thereafter break, i.e., decrease in viscosity over a very short period of time. The viscous aqueous solution comprises a polysaccharide having an ability to thicken water and dispersed or dissolved in the aqueous solution an effective quantity of an organic ester which, at a temperature at which it is desired to break the viscous solution, hydrolyzes over a delayed period of time to form an acid which degrades the polysaccharide, thus causing a splitting of the polysaccharide chain and a decrease in the viscosity of the solution.
REFERENCES:
patent: 2238671 (1941-04-01), Woodhouse
patent: 3024191 (1962-03-01), Jones
patent: 3634237 (1972-01-01), Crenshaw et al.
patent: 3779914 (1973-12-01), Nimerick
patent: 3828854 (1974-08-01), Templeton et al.
patent: 3868998 (1975-03-01), Lybarger et al.
Free Dustin L.
Krumel Karl L.
Snyder Travis C.
Guynn Herbert B.
Kanuch Bruce M.
The Dow Chemical Company
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