Milliken + Co

Kemper David Lake, Jr

Keith Alan Keller

Joseph J Peterson

Christopher Thomas Kochanowicz

Clifford S Bynum

Jiang Li

Jiannong Xu

Xiaodong Edward Zhao

Bhavesh Chandrakant Gandhi

Jason Dean Sprinkle

Brian Michael Burkhart

Weihua Sonya Wolters

Benjamin W Bolt

Keith Allen Keller

A process for extruding polypropylene comprising extruding a composition comprising a polypropylene and a second acid scavenger and less than about 10 ppm of a nucleating agent.

Process for extruding polypropylene

It is possible to improve significantly the optical performance of diacetal or DBS-based nucleating or clarifying agents using a co-additive. Haze is a measure of the lack of clarity in a thermoplastic or plastic material. A low level of haze is usually quite desirable, and nucleating/clarifying agents are designed to reduce the degree of haze in a plastic or thermoplastic material. A co-additive may be used in connection with a nucleating/clarifying agents in a polymer or copolymer to achieve even greater results in terms of improved clarity (reduced haze), or in terms of a higher crystallization temperature (Tc) of the polymer. A method for reducing haze in polymer articles using a co-additive composition in addition to nucleating and clarifying agents is disclosed.

Co-additive compositions and methods for applying co-additive compositions into nucleated polymer compounds

Clarified polyolefins such as polypropylene are used widely to make polymer articles, containers, and the like. Such articles may be manufactured by the injection of molten polymer into a mold or forming device in manufacturing processes at high rates. A clarified composition is provided to achieve optimized clarity and organoleptic performance at lower processing temperatures and/or within a polypropylene resin having a higher melt flow rate.

Polyolefin composition

Compositions comprising hexahydrophthalate (HHPA) metal salts may be useful as nucleating agents in polyolefins. Masterbatch compositions containing such salts and silica and/or hydrotalcite are particularly useful in reducing haze and improving properties of manufactured polyolefin articles or film. Such compositions may be dispersed effectively and efficiently into resin during manufacturing operations in the form of a masterbatch, thereby providing excellent polymer crystallization temperatures, improved polymer physical properties, improved dimensional stability, and improved transparency.

Compositions comprising metal salts of hexahydrophthalic acid and methods of employing such compositions in polyolefin resins

Addictive composition and articles containing the same

Concentrates (also known as masterbatches) of certain bicyclic dicarboxylate salt thermoplastic nucleating additives in order to facilitate use thereof in typical thermoplastic manufacturing procedures are provided. Such nucleating additives have been found to impart high peak crystallization temperatures to thermoplastics (such as polypropylene, as one example); however, when combined in masterbatch form in the past such a nucleation property was sacrificed due to unforeseen problems associated with polymer-containing concentrates (i.e., pellets, for example) of such additives. Thus, improvements in masterbatching of these bicyclic dicarboxylate salt thermoplastic nucleators has been accomplished to the level necessary to allow for concentrate use with concomitant effective nucleation effects at the same level (if not in excess thereof) of the utilization of such a nucleator added in powder form. Thermoplastic additive compositions and methods of producing thermoplastics with such nucleator additive concentrates are also contemplated within this invention.

Concentrates of saturated bicyclic dicarboxylate salts to facilitate use thereof as polymer nucleation additives

Concentrates (also known as masterbatches) of certain bicyclic dicarboxylate salt thermoplastic nucleating additives in order to facilitate use thereof in typical thermoplastic manufacturing procedures are provided. Such nucleating additives have been found to impart high peak crystallization temperatures to thermoplastics (such as polypropylene, as one example); however, when combined in masterbatch form in the past such a nucleation property was sacrificed to a certain extent due to unforeseen problems associated with polymer-containing concentrates (i.e., pellets, for example) of such additives. Thus, improvements in masterbatching of these bicyclic dicarboxylate salt thermoplastic nucleators have been accomplished to the level necessary to allow for concentrate use with concomitant effective nucleation effects at the same level (if not in excess thereof) of the utilization of such a nucleator mixed prior to melt-compounding with a target or resin or added directly into a molten resin (i.e., at-level, or not in concentrate form). Methods of producing thermoplastics with such nucleator additive concentrates and thermoplastic articles made therefrom are also contemplated within this invention.

Growing community of inventors

Spartanburg, SC, United States of America

Kemper David Lake, Jr