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Additive compositions and polymer compositions containing the same

a technology of additive compositions and polymer compositions, applied in the field of additive compositions, can solve the problems of ineffective nucleating agents in increasing the stiffness inconsistent shrinkage of the molded part produced,

Inactive Publication Date: 2018-02-15
MILLIKEN & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes an additive composition for nucleating polyolefins, specifically polypropylene polymers. The composition includes specific anions and cations in a specific ratio to each other. The anions include phosphate ester anions, aromatic carboxylate anions, aluminum (III) cations, sodium cations, lithium cations, and zinc (II) cations. The cations may be present in the form of individual or mixed salts. The composition may also contain fatty acid salts. The technical effect of the additive composition is to improve the nucleation process for polyolefins, resulting in faster and more efficient polymerization.

Problems solved by technology

For example, a particular nucleating agent may be very effective at increasing the peak polymer recrystallization temperature of a thermoplastic polymer, but the rapid rate of crystallization induced by such a nucleating agent may cause inconsistent shrinkage of a molded part produced from a thermoplastic polymer composition containing the nucleating agent.
Such a nucleating agent may also be ineffective in increasing the stiffness of the molded part to a desirable degree.

Method used

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  • Additive compositions and polymer compositions containing the same
  • Additive compositions and polymer compositions containing the same
  • Additive compositions and polymer compositions containing the same

Examples

Experimental program
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Effect test

example 1

[0072]The following examples demonstrates the production of polymer compositions according to the invention. The example further describes certain physical properties exhibited by the polymer compositions.

[0073]Fourteen polymer compositions (Samples 1A-1N) were produced with additive compositions as described in Table 1 below. The polymer compositions were produced by individually adding the necessary salts to the polymer. In the table, “PE” denotes the 2,2′-methylene-bis-(4,6-di-tert-butylphenyl) phosphate anion, and “AC” denotes the benzoate anion, except for Sample 1J in which the anion is the 4-tert-butylbenzoate anion. The mole percentage (mol. %) of anions reported in the table is the mole percentage of the total amount of phosphate ester anions and aromatic carboxylate anions present in the additive composition. The mole percentage (mol. %) of cations reported in the table is the mole percentage of the total amount of sodium cations, aluminum (III) cations, lithium cations, a...

example 2

[0076]The following examples demonstrates the production of polymer compositions according to the invention. The example further describes certain physical properties exhibited by the polymer compositions.

[0077]Ten polymer compositions (Samples 2A-2J) were produced with additive compositions as described in Table 3 below. The polymer compositions were produced by individually adding the necessary salts to the polymer. In the table, “PE” denotes the 2,2′-methylene-bis-(4,6-di-tert-butylphenyl) phosphate anion, and “AC” denotes the benzoate anion, except for Sample 2J in which the anion is the 4-tert-butylbenzoate anion. The mole percentage (mol. %) of anions reported in the table is the mole percentage of the total amount of phosphate ester anions and aromatic carboxylate anions present in the additive composition. The mole percentage (mol. %) of cations reported in the table is the mole percentage of the total amount of sodium cations, aluminum (III) cations, lithium cations, and zi...

example 3

[0079]The following examples demonstrates the production of polymer compositions according to the invention. The example further describes certain physical properties exhibited by the polymer compositions.

[0080]Twelve polymer compositions (Samples 3A-3L) were produced with additive compositions as described in Table 5 below. The polymer compositions were produced by individually adding the necessary salts to the polymer. In the table, “PE” denotes the 2,2′-methylene-bis-(4,6-di-tert-butylphenyl) phosphate anion, “CD” denotes the cis-endo-bicyclo[2.2.1]heptane-2,3-dicarboxylate anion for Samples 3A and 3B and the cis-hexahydrophthalate anion for Sample 3C, and “AC” denotes the benzoate anion, except for Sample 31 in which the anion is the 4-tert-butylbenzoate anion. The mole percentage (mol. %) of anions reported in the table is the mole percentage of the total amount of phosphate ester anions, cycloaliphatic dicarboxylate anions, and aromatic carboxylate anions present in the additi...

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Abstract

An additive composition comprises phosphate ester anions conforming to a specified structure, aromatic carboxylate anions, optionally cycloaliphatic dicarboxylate anions, aluminum (III) cations, sodium cations, optionally calcium cations, optionally lithium cations, and optionally zinc (II) cations. The anions are present in the additive composition in specified molar percentages. The cations are also present in the additive composition in specified molar percentages.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims, pursuant to 35 U.S.C. §119(e), priority to and the benefit of the filing date of U.S. Patent Application No. 62 / 373,703, which was filed on Aug. 11, 2016.TECHNICAL FIELD OF THE INVENTION[0002]This application and the invention described herein is generally directed to additive compositions suitable for use in polymers. In one embodiment, the additive composition is a nucleating agent for polyolefins, such as polypropylene polymers.BACKGROUND[0003]Several nucleating agents for thermoplastic polymers are known in the art. These nucleating agents generally function by forming nuclei or providing sites for the formation and / or growth of crystals in the thermoplastic polymer as it solidifies from a molten state. The nuclei or sites provided by the nucleating agent allow the crystals to form within the cooling polymer at a higher temperature and / or at a more rapid rate than the crystals will form in the virgin, non-nucl...

Claims

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Application Information

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IPC IPC(8): C08K5/098C08K5/527
CPCC08K5/527C08K5/098C08K5/0083C08K5/521C08L23/12C08K5/00C08L23/10C08L101/00C08J3/20C08J2323/12
Inventor TSAI, CHI-CHUNWAYBRIGHT, SHANE M.KELLER, KEITH A.
Owner MILLIKEN & CO
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