| 摘要 |
Improved heat stability of halogen containing polymers is obtained by applying as stabilizer a synergistic mixture of A. An organotinstabilizer of the formula RxSnZ(4-x) and B. A second organotinstabilizer having one of the following formulae YY R-Sn--Y--XR2-Sn ANGLE X YY YY R2+L{13 Sn ANGLE ANGLE X ANGLE ANGLE Sn-R2 YY YY R-Sn ANGLE XR-Sn ANGLE ANGLE X ¦¦ ¦Y¦Y Y--------X--Y where x may be 1, 2 or 3, X represents the residue of a polyol containing from 2 to 6 hydroxylgroups; Y represents oxygen or sulphur; Z represents one of the following anions: -S(CH2)nCOOR* where n=1 or 2, -OCCH=CHCOR*, -OC-R, PARALLEL PARALLEL PARALLEL OOO -SR and >S and in addition when x=2 -OCCH=CHCO- PARALLEL PARALLEL OO and -S(CH2)nCOO-; R represents an alkyl group containing 1-18 carbon atoms, a cycloalkyl group, an aryl group, an aralkyl or alkaryl group and R* represents the groups represented by R or the residue of a polyol containing from 2 to 6 hydroxylgroups. |
