Concept

Nitrile rubber

Related publications (34)

Asymmetric synthesis. 29. Preparation of 1,8-diazaspiro[5.5]undecane derivatives

From 2-cyano-6-phenyloxazolopiperidine, two highly efficient routes have been developed for the asym. synthesis of the spiropiperidine system: 1,8-diazaspiro[5.5]undecane. The key step was generation of the imine salts from the functionalized alpha -amino ...

1993

Asymmetric synthesis. XX. Preparation of a novel spiropiperidine system by the CN(R,S) method

Jieping Zhu

A novel spiropiperidine system I i.e. an aza structural analog of histrionicotoxin was constructed from 2-cyano-6-phenyloxazolopiperidine synthon II. The suitable quaternary carbon was created by alkylation at the position alpha to the nitrile followed by ...

1989

Removing solids suspended in an aqueous medium

Jutta Christine Wandrey

Suspended org. and inorg. solids are removed from aq. soln. by adding an improved water-sol. acryloguanamine copolymer flocculant with mol. wt. >2000 and contg. 0-1000 units each of acrylamide, vinyl guanamine, acrylic acid, trimerized acrylonitrile struct ...

(Institut fuer Wasserwirtschaft, Ger. Dem. Rep.).1985

Coagulation of rubber latexes

Jutta Christine Wandrey

Coagulated SBR or nitrile rubber latexes with low salt contents, suitable for processing in belt or bar driers, are prepd. by adding mixts. of NaCl and quaternary ammonium polymers to the latexes. Thus, an 18%-solids nitrile rubber latex contg. 0.4 phr pol ...

1980

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