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AssigneeMilliken & Company
InventorsK. David Lake, Jr., Nathan A. Mehl, Christopher Thomas Kochanowicz
Estimating the term…
A specific combination of two different polyolefin clarifying and nucleating agents, namely 3,4-dimethyldibenzylidene sorbitol and p-methyldibenzylidene sorbitol is provided. Such a combination surprisingly provides improved clarification and crystallization temperatures to polypropylene articles and formulations, better than bis-p-methyldibenzylidene sorbitol alone and equivalent or better than 3,4-dimethyldibenzylidene sorbitol. Such a combination of compounds thus permits the utilization of a new additive for the purpose of modifying polyolefin properties, such as polypropylene clarification and nucleation. The inventive combination may be introduced within any polyolefin composition, again preferably polypropylene, which may then be molded into any shape or form. A method of producing a polyolefin plastic utilizing the inventive combination of compounds is also provided.
A polyolefin additive composition comprising a combination of two compounds, wherein said combination consists of from 10 to 88.5% by weight of the total combination of bis(3,4-dimethylbenzylidene) sorbitol and from 12.5 to 90% by weight of the total combination of bis(p-methylbenzylidene) sorbitol.
A polyolefin nucleator composition comprising at least 1000 ppm of a mixture of compounds, wherein said compounds are bis(3,4-dimethylbenzylidene) sorbitol and bis(p-methylbenzylidene) sorbitol, wherein said polyolefin nucleator composition provides a crystallization onset temperature within a target polyolefin article formulation above the crystallization onset temperature provided for a comparative polyolefin article comprising the same polyolefin formulation but comprising bis(p-methylbenzylidene) sorbitol as its sole polyolefin nucleator component, wherein the concentration of said sole polyolefin nucleator component within said comparative polyolefin article is equivalent to the total concentration of the polyolefin nucleator mixture within said target polyolefin article.
A polyolefin nucleator composition comprising at least 1000 ppm of a combination of compounds, wherein said compounds are bis(3,4-dimethylbenzylidene) sorbitol and bis(p-methylbenzylidene) sorbitol, wherein said polyolefin nucleator composition provides a peak crystallization temperature within a target polyolefin article formulation above the peak crystallization temperature provided for a comparative polyolefin article formulation comprising the same polyolefin article formulation but comprising bis(p-methylbenzylidene) sorbitol as its sole polyolefin nucleator component, wherein the concentration of said sole polyolefin nucleator component within said comparative polyolefin article is equivalent to the total concentration of the polyolefin nucleator mixture within said target polyolefin article.
A polyolefin clarifier composition comprising at least 1000 ppm of a combination of nucleator compounds, wherein said compounds are at least bis(3,4-dimethylbenzylidene) sorbitol and bis(p-methylbenzylidene) sorbitol, wherein said polyolefin clarifier composition provides a haze measurement within a target polyolefin article formulation below the haze measurement provided for a comparative polyolefin article comprising the same polyolefin formulation but comprising bis(p-methylbenzylidene) sorbitol as its sole polyolefin clarifier component, wherein such haze measurements are made in accordance with ASTM Standard Test Method D1003-61, and wherein the concentration of said sole polyolefin nucleator component within said comparative polyolefin article is equivalent to the total concentration of the polyolefin nucleator mixture within said target polyolefin article.
A method of nucleating a polyolefin comprising the steps of:
Dependencies are inferred from the claim text.