Process and composition for well dispersed, highly loaded color masterbatch
AssigneeChroma Color Corporation
InventorsJeffrey S. Smink, Ronald M. Harris
Life of this patent
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Abstract
A highly loaded and well-dispersed masterbatch composition and process for making thereof from a split stream process. The masterbatch composition includes a colorant, a thermoplastic carrier, a metallocene polymer processing aid, and optionally an additive. The split stream may be formed of a primary feed and a secondary feed. The primary and second feeds are combined by at least one of the following: supplying the secondary feed in either the same feed port as the primary feed, in a stream located upstream the primary feed, in a stream located downstream the primary feed, or a combination thereof.
Claims20
A process for making a masterbatch composition comprising:
- providing an additive mixture including a colorant and an optional additive component or components to a primary feed;
- melting a thermoplastic and providing the melted thermoplastic to a secondary feed that is physically separated from the primary feed;
- combining the secondary feed with the primary feed and extruding the resultant mixture to form a masterbatch composition having greater than 45 wt. % of the additive mixture;
- and
- wherein, upon combining the primary and secondary feeds, a weight ratio of primary to secondary feed is greater than 60:40.
A process for making a masterbatch composition from a split stream process comprising:
- a) mixing a colorant into a mixture in a primary feed;
- b) pre-melting a thermoplastic carrier in a secondary feed;
- c) combining the mixture of the primary feed and the secondary feed, including the melted thermoplastic carrier, at a ratio (by weight) of primary feed to secondary feed between 46:54 and 87:13;
- and
- d) extruding the combined mixture to form a masterbatch composition having between 15 to 80 wt. % of colorant.
Dependencies are inferred from the claim text.