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Elastomeric nanocomposites, nanocomposite compositions, and methods of manufacture

A technology of nanocomposite materials and elastomers, which can be used in transportation and packaging, vehicle parts, wheels, etc., and can solve problems such as clay dispersion or peeling difficulties

Active Publication Date: 2014-02-19
EXXONMOBIL CHEM PAT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, in the production of elastomeric nanocomposites, the incompatibility between hydrophobic polyolefin elastomers and hydrophilic inorganic clays can make it very difficult to achieve good clay dispersion or exfoliation within the elastomers.

Method used

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  • Elastomeric nanocomposites, nanocomposite compositions, and methods of manufacture
  • Elastomeric nanocomposites, nanocomposite compositions, and methods of manufacture

Examples

Experimental program
Comparison scheme
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Embodiment

[0106] The following examples were performed to determine the properties of nanocomposites prepared in accordance with the disclosed invention.

[0107] Nanocomposite 1: 10.2 g of organoclay (nanoclay with dimethyl ditallow ammonium surfactant—treated to remove free modifier—from Southern Clay Products, Gonzales, TX USA) was added to 400 mL of isohexane middle. The clay slurry was added to 490 grams of BIMSM cement (copolymer: 10wt% PMS and 0.85mol% BrPMS / 20.4wt% in hexane). The clay slurry and rubber cement were mixed under high shear conditions at ambient temperature for 60 minutes. The product was precipitated by adding 2000 mL of isopropanol to the mixture and then dried.

[0108] Nanocomposite 2: To a 378.5 liter glass-lined reactor was added 29.4 kg BIMSM (copolymer: 10 wt% PMS and 0.85 mol% BrPMS / 22.0 wt% in hexane) and 45.1 liters of isohexane. After adding 3000 g of organoclay (nanoclay with dimethyl ditallow ammonium surfactant—treated to remove free modifier—from...

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Abstract

A nanocomposite comprising at least one elastomer and at least one nanofiller. The elastomer comprises units derived from isoolefins having from 4 to 7 carbon atoms and at least one multiolefin. The nanofiller comprise a layered filler and an amine modifier wherein the nanofiller is substantially free of any unassociated amines. By eliminating unassociated amines in the nanofiller, prior to contact with the elastomer, the nanocomposite has improved processability characteristics while maintaining desired impermeability characteristics.

Description

[0001] Cross References to Applications [0002] This application claims the benefit of U.S.S.N. 12 / 771,775, filed April 30, 2010, the disclosure of which is incorporated herein by reference in its entirety. field of invention [0003] The present invention relates to elastomeric nanocomposites, compositions comprising said elastomeric compositions, methods of producing nanocomposites, and the use of said nanocomposites in articles. More specifically, the present invention relates to halogenated C4-C7 isoolefin-based nanocomposites with improved properties and blending characteristics. Background of the invention [0004] Rubbery polymers containing a majority of isobutylene units are known for their low gas permeability, unique damping properties, and low surface energy; these properties make such copolymers particularly useful in applications such as tire innerliners. hopefully. At least one unsaturated comonomer and / or comonomer containing reactive functionality is intr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/04
CPCC08K9/04Y10T152/10495Y02T10/86
Inventor 翁卫青M·B·罗德格尔斯J·P·索森M·W·约翰斯顿R·N·韦布
Owner EXXONMOBIL CHEM PAT INC