Preparation of polymers of hydroxamic functions

Details Preparation of polymers of hydroxamic functions Preparation of polymers of hydroxamic functions

1983-08-24

1986-05-06

Schofer, Joseph L.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

5253294, 525380, C08F 832

Patent

active

045873062

ABSTRACT:
Improvements in the preparation of polymers of hydroxamic functions that consist in heating a polyacrylamide aqueous solution with a hydroxylamine salt at temperatures of from about 50.degree. to 85.degree. C.
The polymers obtained are used as adjuvants of soil drilling muds, especially in petroleum drilling.
The invention concerns itself with improvements in the preparation of polymers of hydroxamic functions, the resulting novel polymers, and applications thereof. The invention provides for the obtention of such polymers having a desired number of hydroxamic groups without noticeable formation of objectionable secondary products; it makes possible, in addition, the preparation of derivatives wherein the chain of the polymer and/or the hydroxamic groups contain different substituents.

REFERENCES:
patent: 4012366 (1977-03-01), Naarmann et al.
patent: 4015062 (1977-03-01), Eilingsfeld et al.
patent: 4021397 (1977-05-01), Shab
patent: 4081516 (1978-03-01), Scholten et al.
patent: 4397996 (1983-08-01), Chiklis et al.

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