摘要 |
S-Triazine prepolymers with aromatic cyanate groups are obtained by condensation of aromatic di- or polyhydroxy compounds with 0.01 to 0.5 mol of 4,6-dichloro-s-triazine per one hydroxy group. Subsequently the condensation products are reacted with cyanogen halide in the presence of a base. s-Triazine prepolymers may be polymerized to form hard plastics with resistance to high temperature.
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