Method of sealing by injecting a mixture based on acrylamide and

Details Method of sealing by injecting a mixture based on acrylamide and Method of sealing by injecting a mixture based on acrylamide and

1989-04-20

1990-07-17

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524829, C08K 529

Patent

active

049421999

ABSTRACT:
An aqueous solution of acrylamide is mixed with an aqueous solution containing a polymerization trigger. Firstly at least one of the solutions contains a color indicator having a given color in the solution based on acrylamide and a different color in the solution contained in the trigger, and whose color changeover zone corresponds to the optimum proportions of the reagents in solution. Secondly, during mixing, the respective quantities of the two solutions are adjusted to occupy the changeover zone of the color indicator such that the mixture takes up the color corresponding to the color of the indicator in the solution based on acrylamide. The mixture preferably contains acrylamide, methylenebisacrylamide, and triethanolamide glycol, using ammonium persulfate as the trigger and using bromophenol blue as the color indicator, with the color thereof disappearing after polymerization.

REFERENCES:
patent: 3847858 (1974-11-01), Eilers et al.
patent: 4361687 (1982-11-01), Arndt et al.
patent: 4366194 (1982-12-01), Pilny et al.
patent: 4438976 (1984-03-01), Baughman et al.
patent: 4521452 (1985-06-01), Highsmith
The Merck Index, 9th Ed., Merck & Co., Inc., Rahway, 1976, pp. 1448/7042.

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