Masterbatches for delustring polyamides

Details Masterbatches for delustring polyamides Masterbatches for delustring polyamides

1986-06-09

1987-12-01

Hoke, Veronica P.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

523351, C08K 322, C08K 904

Patent

active

047105356

ABSTRACT:
The present invention relates to masterbatches for delustring processable polyamides.
They contain 50 to 90% of a copolyamide used as a binder and consisting of 30 to 100% of hexamethylene adipamide units and 0-70% of caproamide units and 10 to 50% by weight of anatase titanium dioxide coated with 0.01 to 1.5% of silica and 1 to 3% of alumina and treated with a polydimethylsiloxane oil present in a proportion of 0.2 to 10% by weight of TiO.sub.2.
They are obtained by adding TiO.sub.2 powder into the autoclave immediately after the pressure release stage, when the reaction mass is still at a high temperature and before vacuum is applied.
The masterbatches according to the invention may be introduced directly into the liquid stream of the polymer to be spun.

REFERENCES:
patent: 2689839 (1954-09-01), Heckert
patent: 2846332 (1958-08-01), Nesty
patent: 3321566 (1967-05-01), Whitman
patent: 3324071 (1967-06-01), Skoog
patent: 3505088 (1970-04-01), Luginsland et al.
patent: 3673147 (1972-06-01), Bor
patent: 4344799 (1982-08-01), Kohler et al.
patent: 4474681 (1984-10-01), Belde et al.

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