C - Chemistry – Metallurgy – 08 – K
Patent
C - Chemistry, Metallurgy
08
K
C08K 5/1565 (2006.01) C08L 69/00 (2006.01)
Patent
CA 2377717
A thermoplastic polycarbonate molding composition having improved resistance to gamma radiation-induced yellowing is disclosed. Paricularly suitable for the manufacture of devices geared for medical applications, the composition contains an additive amount of a stabilizing cyclic acetal of a glycerol monoester comforming structurally to formula (I) where R1 denotes a C1-30- alkyl group and R2 denotes an aryl radical.
L'invention concerne une composition de moulage de polycarbonate thermoplastique présentant une meilleure résistance au jaunissement induit par les rayons gamma. Particulièrement adaptée à la production de dispositifs destinés à des applications médicales, la composition contient une quantité ajoutée d'un acétal cyclique stabilisant d'un monoester de glycérol se conformant structurellement à la formule (I) dans laquelle R¿1? représente un groupe alkyle C¿1-30? et R¿2? représente un radical aryle.
Bolton Daniel H.
Derikart David M.
Johnson James B.
Krishnan Sivaram
Corporation Bayer
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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