摘要:
The object of the present invention is polycarbonate molding compositions containing polycarbonates, stabilizers of the general formula (I) R.sub.1 --X--CZ--Y--R.sub.2 and optionally polypropylene glycols. The object of the present invention is also use of these molding compositions to produce items for medical applications.
摘要:
The present invention relates to polycarbonate molding compositions containing polycarbonates, stabilizers of general formula ##STR1## and optionally polypropylene glycols. The present invention also relates to the use of these molding compositions for the production of articles for medical applications.
摘要:
A thermoplastic molding composition comprising aromatic polycarbonate, saccharine and a compound having at least one ester group in its structure is disclosed. The inventive composition is characterized in its improved stability and hence suitable for the preparation of stable films, compact discs and sheets.
摘要:
New aromatic polycarbonates contain, in their bisphenol moiety, at least in part bisphenols of the type 1,1-bishydroxyphenylhexafluorodichlorocyclopentane, 1,1-bishydroxyphenylheptafluoromonochlorocyclopentane or 1,1-bishydroxyphenyloctafluorocyclopentane.
摘要:
The present invention provides polycarbonate moulding compositions containing polycarbonates, stabilisers of the general formula (I)R.sub.1 --X--(CHR.sub.4).sub.n --Y--R.sub.2and optionally polypropylene glycols.The present invention also provides use of these moulding compositions for preparing items for medical applications.
摘要:
The present invention provides polycarbonate moulding compositions containing polycarbonates, stabilisers of the general formula (I) R.sub.1 --X--(CHR.sub.4).sub.n --Y--R.sub.2, where X and Y, are either ##STR1## , and Y may also be --S--, and optionally polypropylene glycols. The present invention also provides use of these moulding compositions for preparing items for medical applications.
摘要:
An improvement to the phase interface process of preparing aromatic polycarbonate is disclosed. The process is characterized in that the phosgenation is carried out at 0 to 40° C., and in that the temperature of the reaction mixture at the time of addition of the catalyst at 10 to 40° C., and in that the molar ratio of aromatic dihydroxy compounds to phosgene at 1:1.05 to 1:1.20. The polycarbonate thus produced is characterized in its low content of carbamates, making it particularly suitable for the preparation of optical storage media.
摘要:
A polycarbonate resin comprising fluorescing particles that feature a particular size distribution is disclosed. The size distribution of these particles that fluoresce upon excitation at wavelengths of 400-440 nm, 50× magnification and illumination time of 40 msec per scan was found to be critical in determining the suitability of the resin for optical, particularly optical storage, applications.
摘要:
The invention relates to new, monomeric, perfluoroalkyl-substituted metal complexes, processes for their production, and their use in diagnosis and therapy.The compounds according to the invention are suitable especially as in vivo contrast media in nuclear spin tomography (MRT). They can preferably be used as blood-pool agents and as lymphographic agents.