Prepn. of pigmented curable moulding materials - comprising unsatd. polyester, comonomer and thermoplastic polymer contg. dispersed pigment

摘要

The prepn. of pigmented, curable moulding materials by mixing (a) 100 pts. wt. of an unsatd. polyester; (b) 30-150 pts. wt. of a monomer copolymerisable with (a); (c) 1-100 pts. wt. of a thermoplastic polymer; and (d) 0.1-15 pts. wt. of a colour pigment; and opt. (e) the usual additives. The pigment is dispersed in at least one part of the thermoplastic polymer using an extruder at temps. in the range of the m.pt. of the thermoplastics. Pref. the dispersion process lasts no more than 5 mins.. USE/ADVANTAGE - The moulding materials can be used to form coloured moulded prods.. No pigment sepn. occurs due to the use of two polymers, and the components can be mixed in the usual mixing devices.