Liquid colorant/additive concentrate for incorporation into plastics
AssigneeFerro Corporation
InventorsNeil A. Burditt, Richard L. Abrams
Life of this patent
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Abstract
Liquid concentrates for incorporation into polymeric resins are described that are storage stable and resistant to settling or viscosity changes which comprise: (I) a vehicle comprising: (A) at least one organic rosin material; (B) at least one surfactant; and (II) at least one colrant or additive. The liquid concentrates of the present invention have a body or consistency that allow them to readily flow by gravity and are further characterized by a substantially uniform viscosity. The liquid color concentrates of the present invention also are compatible with a wide variety of plastics and facilitate a reduction in processing deficiencies such as screw-slippage, water carry-over and uneven flow to the pump inlet.
Claims16
A method for modifying a polymeric resin that comprises:
- (1) providing a polymeric resin;
- (2) providing a liquid concentrate comprising:
- (I) a substantially nonaqueous, rosin based vehicle comprising:
- (A) at least about 52 percent by weight of the vehicle of at least one non-polymeric organic rosin ester;
- (B) at least about 0.1 percent by weight of the total concentrate of at least one surfactant having a surfactant demand which is met by a concentration of no more than about 20 percent by weight of the total concentrate;
- and
- (II) up to about 85 percent by weight of the total concentrate of at least one colorant or additive;
- and
- (3) intimately blending a major amount of said polymeric resin with a minor property improving amount of said liquid concentrate;
- wherein said concentrate flows readily by gravity and is characterized by a viscosity at 25.degree. C. under a shear stress of 12.5 thousand dynes/cm.sup.2 of about 5 to about 1,500 poise.
Dependencies are inferred from the claim text.