Ionomers of ethylene acid copolymers with enhanced creep resistance

A technology of ethylene acid copolymers and ionomers, which is applied in the field of ionomers and can solve problems such as restricted use

Pending Publication Date: 2021-02-26
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although ionomers can be used in many applications, ionomers have a limited service temperature, which limits the use of ionomers in applications requiring creep resistance at temperatures above 60 °C

Method used

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  • Ionomers of ethylene acid copolymers with enhanced creep resistance

Examples

Experimental program
Comparison scheme
Effect test

example

[0058] test program

[0059] Melt index (MI) is measured using ASTM D-1238 with a 2160 gram weight.

[0060] Melting points (Tm) are measured using Differential Scanning Calorimetry (DSC). Differential scanning calorimetry (DSC) measurements were performed on a TA Instruments Q1000 DSC equipped with an RCS cooling accessory and an autosampler. The melting point (Tm) of the samples was measured according to ASTM D3418.

[0061] The composition of the ionomer was determined using Perkin Elmer Fourier Transform Infrared Spectroscopy (FTIR). Compression molded films of 5 mil thickness were used for FTIR analysis.

[0062] The following examples are provided to illustrate various embodiments, but are not intended to limit the scope of the claims. All parts and percentages are by weight unless otherwise indicated. Approximate properties, characteristics, parameters, etc. are provided below with respect to various working examples, comparative examples and materials used in the ...

example 1

[0069] Example 1 - Creep Resistance of Ethylene Acid Copolymers Containing Dicarboxylic Acid Monomers

[0070] The results, as summarized in Table 1, include data derived from Inventive Example 1 and Comparative Example C1, the composition of which was previously described.

[0071] The copolymer composition in Example 1 was a blend of a first ethylene acid copolymer, a second ethylene acid copolymer, and an aliphatic monofunctional organic acid. Example 1 is a blend of 80% by weight of the first ethylene acid copolymer and (b) 20% by weight of the second ethylene acid copolymer. First ethylene acid copolymer, comparative example C1. The second ethylene acid copolymer, the E / iBA / MAME terpolymer, included 10% by weight isobutyl acrylate and 12% by weight MAME. The E / iBA / MAME terpolymer had a melt index (MI) of 95 g / 10 minutes according to ASTM D1238 using 2160 g and measured at 190°C.

[0072] Example 1 was prepared in a Haake Rheocord 90 melt mixer at a temperature of about...

example 2

[0077] Example 2 - Creep Resistance of Ethylene Acid Copolymers Containing Aliphatic Monofunctional Organic Acids

[0078] The results, as summarized in Table 2, include data derived from Example 2 of the present invention. Example 2 is a blend of a first ethylene acid copolymer and a second ethylene acid copolymer. Example 2 includes 70 wt.% of the first ethylene acid copolymer (Comparative Example C1) and (b) 30 wt.% of the second ethylene acid copolymer, E / iBA / MAME terpolymer comprising 10 wt.% iBA and 12 wt.% MAME, and the MI of the terpolymer was 95 g / 10 min as measured at 190°C.

[0079] Example 2 was prepared in a Haake Rheocord 90 melt mixer at a temperature of about 210° C. at 150 rpm for 6 minutes. The melt index of Example 2 was 0.9 grams / 10 minutes as measured according to ASTM D1238 using 2160 g and measured at 210°C.

[0080] Table 2: Dimensional change (%) when the static load is 110 grams

[0081] Comparative example C3 Comparative example C4 ...

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Abstract

According to one embodiment, an ionomer includes a neutralized blend of an ethylene acid copolymer and an aliphatic, mono-functional organic acid. The blend includes from 60 to 95 wt.%, based on the total wt.% of the blend, and from 5 to 40 wt.% of the aliphatic, mono-functional organic acid based on the total wt.% of the blend. The ethylene acid copolymer being the polymerized reaction product of: ethylene, alkyl acrylate; optionally monocarboxylic acid monomer; and unsaturated dicarboxylic acid monomer. At least 30 mole percent of total acid units of the blend are neutralized with a magnesium cation of the magnesium neutralizing salt.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Provisional Patent Application No. 62 / 712,591, filed July 31, 2018, the entire disclosure of which is hereby incorporated by reference. technical field [0003] Embodiments of the present disclosure relate generally to ionomer resins, and in particular to ionomers comprising ethylene, monocarboxylic acid monomers, unsaturated dicarboxylic acid monomers, alkyl acrylate monomers, aliphatic Polymerized reaction products of monofunctional organic acids and combinations thereof which are at least partially neutralized with magnesium cations. Background technique [0004] Ionomers are commonly used materials in various applications due to their higher tensile strength, higher clarity, better abrasion resistance and higher stiffness than the precursor acid copolymers. For example, ionomers of ethylene acid copolymers have found use in many applications, such as food packaging, foamed...

Claims

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Application Information

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IPC IPC(8): C08L23/08
CPCC08L23/0876C08F220/1804C08F220/1802C08F220/06C08F220/14C08F222/06C08K3/22C08K5/098C08K2003/2203C08K2003/2224C08K2003/2296C08L2205/025
InventorR·T·H·周
OwnerDOW GLOBAL TECH LLC