Polymer compositions comprising nucleating or clarifying agents

A kind of composition, nucleating agent technology, applied in the field of polymer composition

Inactive Publication Date: 2008-09-17
MILLIKEN & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Polymer compositions comprising nucleating or clarifying agents
  • Polymer compositions comprising nucleating or clarifying agents
  • Polymer compositions comprising nucleating or clarifying agents

Examples

Experimental program
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Effect test

Embodiment 1

[0064] This example demonstrates the changes in thermal and optical properties exhibited by the polymer compositions described herein. Four samples (1A-1D) were prepared using four commercially available polyethylene resins compounded with about 2.0 wt% (based on the total weight of the polymer composition) of a masterbatch containing about 10 wt% (based on the masterbatch The commercially available 1,3:2,4-bis(3,4-dimethylbenzylidene) sorbitol nucleating agent (the total weight of the feed) ( 3988, available from Milliken Chemical) and approximately 90% by weight (based on the total weight of the masterbatch) of random copolymer polypropylene. Therefore, each compounded polymer composition included 0.2 wt% 1,3:2,4-bis(3,4-dimethylbenzylidene)sorbitol nucleating agent and 1.8 wt% random copolymer propylene.

[0065] Compounded samples were injection molded into 50 mil plaques using an Arburg 40-ton injection molding machine. After storing the molded sheets for at least 12 ...

Embodiment 2

[0073] manufacture of cups

[0074] A series of cups with an average weight of approximately 20 g and a nominal wall thickness of 25 mils (0.025 inches) were produced using a Husky S-90 injection molding machine. The polymer composition used to produce the samples contained approximately 2% by weight (based on the total weight of the composition) of the masterbatch described in Example 1 and 2% by weight of the masterbatch described in Example 9.

Embodiment 3

[0076] A third set of cups (Samples 3A-3B) was produced by the same method as in Example 2. The polymer composition used to produce the cups included a control (sample 3A), which included a commercially available HDPE resin, and a polymer resin according to the invention (sample 3B), which included the same HDPE resin and 2.5 wt % (based on the total weight of the polymer composition) of a masterbatch comprising 4 wt% (based on the total weight of the masterbatch) of commercially available bicyclo[2.2.1]heptane-2,3-dicarboxylate Disodium acid nucleating agent ( HPN-68L, available from Milliken Chemical) and 96 wt% homopolypropylene.

[0077] After storage for at least 12 hours, the samples were evaluated using the BYK Gardner Haze-Gard Plus to determine haze and clarity.

[0078] Table 4. Optical Properties of Samples 3A-3B.

[0079] sample

[0080] As can be seen from the data shown in Table 4, the cups produced using the polymer composition of the present inven...

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Abstract

A polymer composition comprises a polyolefin and a nucleating or clarifying agent dispersed or dissolved in the polyolefin. Methods for producing the polymer composition and method for producing articles from the polymer composition are also described. Molded polymer articles and polymer film may be manufactured using the compositions of the invention.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Provisional Patent Application No. 60 / 717,645, filed September 16, 2005; and U.S. Provisional Patent Application No. 60 / 731,224, filed October 28, 2005. technical field [0003] The present invention relates to polymer compositions comprising nucleating or clarifying agents. The invention further provides methods of making and using the polymer composition. Background technique [0004] There is a need in the industry for improved polyolefins, including polyethylene among others. Polyethylene is used in the manufacture of a variety of articles, including molded articles, films, and other structures. Improved polymeric articles can provide certain desirable optical properties, such as reduced haze or higher clarity. These articles are prepared by applying nucleating or clarifying agents, and possibly additional additives, to the polymer prior to the manufacture of the article ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/00C08L23/06
Inventor R・W・J・M・汉森M・B・巴克N・A・梅尔W・S・沃尔特斯
Owner MILLIKEN & CO
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