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Semi-crystalline polyolefin composition, method of producing the same, and articles made therefrom

A polyolefin, semi-crystalline technology, applied in chemical instruments and methods, synthetic resin layered products, layered products, etc., can solve problems such as expensive clarifier additives, polypropylene profits under pressure, and lack of competition

Inactive Publication Date: 2013-01-30
DOW GLOBAL TECH LLC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, clarifier additives are expensive and lack competition, which puts clarified polypropylene (cPP) margins under pressure

Method used

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  • Semi-crystalline polyolefin composition, method of producing the same, and articles made therefrom
  • Semi-crystalline polyolefin composition, method of producing the same, and articles made therefrom
  • Semi-crystalline polyolefin composition, method of producing the same, and articles made therefrom

Examples

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Embodiment

[0088] The following examples illustrate the invention but are not intended to limit the scope of the invention.

[0089] All test materials used as clarifiers were dried prior to use and compounded with the polypropylene random copolymer. All examples were compounded using an APV Baker MP19TC extruder available from Baker Perkins Group, Ltd. (Peterborough, UK). For all examples, N 2 flow into the hopper, the O 2 The concentration is adjusted to the standard value ± 4% O 2 . The barrel temperature for each zone of the extruder was the same for all examples as follows: 170°C for zone 1; 190°C for zone 2; 210°C for zone 3; 225°C for zone 4; Zone 5 was 240°C; Zone 6 was 250°C; Zone 7 was at 250°C; and the die temperature was 250°C. These settings resulted in a melting temperature of the polymer of about 256°C. The extruder was set at 400 RPM for all examples. Melting temperature, oxygen # (measured percent oxygen remaining) and output (about 3 kg / hr) were similar for Compa...

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Abstract

A semi-crystalline polyolefin composition comprising: a thermoplastic crystallizable polyolefin; and one or more di-alkyl bis-oxalamide compounds having the formula: wherein R1 is a spacer group and each R2 is a peripheral group and wherein each of R1 and R2a and R2b is an independently selected hydrocarbyl group is provided. Also provided are a method for producing the semi-crystalline polyolefin composition and articles made therefrom.

Description

technical field [0001] The present invention relates to a semicrystalline polyolefin composition, a process for its preparation, articles prepared therefrom and a method for preparing said articles. Background technique [0002] In polypropylene and some other semi-crystalline polymers, the use of nucleating agents to enhance the crystallization process is well established. There are several commercially available nucleating agents such as sodium benzoate, talc, sodium phosphate salts (e.g. Na-11, Na-21), N,N-dicyclohexyl-2,6-naphthalene dicarboxamide, and bicyclo [2,2,1] Heptane dicarboxylate (HPN-68). These typical inorganic and organic salt nucleating agent additives have high melting points and do not melt or dissolve in polypropylene at typical processing temperatures, thereby serving as external nuclei for crystallization. [0003] "Melt-sensitive" nucleating agents (based on modified sorbitol) which not only increase crystallization but also affect crystallite size ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/00C08L23/12C08L23/14C08L53/00C08K5/20B32B27/32B32B27/18
CPCC08L23/142C08K5/0083C08K5/20C08L23/00C08K5/16C08J5/18
Inventor M.J.M.范希林根M.C.T.范特维斯坦德D.克拉森J-Y.乔Y.圣-杰勒德
Owner DOW GLOBAL TECH LLC