Optical fiber

A light guide including a core of polycarbonate and a coating containing a polymer which contains repeating units derived from the monomers

• A) one or more different compounds of the formula (I)
• 12
• in which
• m represents 2, 3 or 4,
• D represents the m-valent group from an aliphatic or aromatic hydrocarbon,
• R1 is hydrogen or methyl,
• Z1, Z2 and Z3, independently, represent oxygen, sulfur, the —N(R) group (in which R is hydrogen or unsubstituted or substituted alkyl, aralkyl or aryl) or a divalent group of the formula (II)
• 13
• in which
• Z represents oxygen, sulfur or the —N(R) group, and
• A represents an unsubstituted or substituted divalent group from an aliphatic, cycloaliphatic, araliphatic or aromatic hydrocarbon,
• Z4 represents oxygen, the divalent group of the formula (II) or one of the following divalent groups
• 14
• A1, A2, A3 and A4, independently, represent an unsubstituted or substituted divalent group from an aliphatic, cycloaliphatic, aromatic-aliphatic or aromatic hydrocarbon,
• n is zero or an integer from 1 to 20,
• p, q and r, independently, may take on the value zero or 1 and
• l has a numerical value such that the weight average of the molecular weight of the compound of the formula (I) is 450 to 5000, and
• B) one or more different compounds of the formula (III)
• 15
• in which
• R2 is hydrogen or methyl,
• A5 represents an unsubstituted or substituted divalent group from an aliphatic or cycloaliphatic hydrocarbon,
• Z5 and Z6, independently, represent oxygen, sulfur or the —N(R′) groups, in which R′ is hydrogen or unsubstituted or substituted alkyl, aralkyl or aryl, and
• R3 is an unsubstituted or substituted alkyl, cycloalkyl or aralkyl group,
• wherein the coating contains one or more different stabilisers chosen from the group consisting of organic phosphites and organic sulfides.