Patent ID: 6673759
Filing Date: 2004-01-06
Classification: B29C,B29K

Abstract:
A cleaning composition for apparatus for processing thermoplastic melts, which composition comprises discrete particles capable of plastic deformation and made from a thermoplastic (A) with a melting point above 250Â° C. and with a crystallinity of not more than 50%, and comprises an amorphous or semicrystalline thermoplastic (B) with a processing temperature below the melting point of the thermoplastic (A), where the proportion of the thermoplastic (A) is from 1 to 95% by weight and that of the thermoplastic (B) is from 5 to 95% by weight, and the total of the percentage proportions by weight of (A) and (B) is always 100% or less, wherein thermoplastic (A) is selected from the group consisting of partially aromatic polyamides, polysulfonates, polyether sulfonates, polyaryl ether ketones, polyether ether ketones, polyphenylene ethers and mixtures of these.