| 摘要 |
PCT No. PCT/FR93/01223 Sec. 371 Date Jun. 19, 1995 Sec. 102(e) Date Jun. 19, 1995 PCT Filed Dec. 10, 1993 PCT Pub. No. WO94/13621 PCT Pub. Date Jun. 23, 1994 alpha -Amino-substituted acetic acids or acid salts of formula <IMAGE> where R represents a hydrogen atom or an alkyl or alkoxy group X represents a hydrogen atom, an alkali metal or alkaline-earth metal or an ammonium residue characterized in that they are totally free of haloacetic acid and alkali metal halide. They are capable of being obtained by reaction, under hot conditions, of glyoxal, or of a precursor of glyoxal, with a secondary amine or one of its salts of formula <IMAGE> where R represents a hydrogen atom or an alkyl or alkoxy group, optionally followed by hydrolysis. They may be used as amphoteric surface-active agents for the manufacture of cosmetic compositions.
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