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1.发明授权Production of spinnable polyamides exhibiting a high regularity and a high dyeability by acidic dyestuffs 失效通过酸性脱水剂生产显示出高常规性和高可变性的可旋转聚酰胺
公开(公告)号：US3632558A
公开(公告)日：1972-01-04
申请号：US3632558D
申请日：1968-07-23
Applicant: SNIA VISCOSA
Inventor： SICLARI FRANCESCO , MADERNO CESANO , PORAZZONI PIERLUIGI , MILANESE PALAZZOLO , SIVESTRONI PIERGIORGIO
Abstract: OR (R1, R2, R3)-N-R4-COO-, WHERE THE SUBSTITUENTS INDICATED BY THE R''S CAN BE SELECTED WITHIN A WIDE, BUT NEVERTHELESS STRICTLY DEFINED RANGE.
R-NH-R''
A METHOD IS DISCLOSED FOR IMPROVING THE DYEABILITY OF POLYMIDE FIBRES BY ACIDIC DYES, SAID METHOD COMPRISING AS AN ESSENTIAL STEP THE ADOPTION OF A NITROGENOUS COMPOUND, WHICH CAN BE BROADLY DEFINED AS BELONGING TO THE CLASS OF BETAINES OR BETAINE-LIKE COMPOUNDS. MANY EXAMPLES ARE GIVEN, WHICH SHOW THE CRITICALLY OF THE SELECTION OF THE SUBSTITUENTS IN THE GENERAL FORMULA
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