EVOH Resin Composition Using Carbon-14 Polypropylene and Boron

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Solution Overview

Problem

EVOH resin compositions containing polypropylene for modification exhibit inferior thermal stability compared to those consisting solely of EVOH, necessitating further improvements.

Innovation Solution

Incorporating a carbon-14-containing polypropylene resin and a boron compound into the EVOH resin composition, with specific mass ratios and content ranges, to enhance thermal stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If polypropylene is incorporated into EVOH resin composition to improve physical properties, then flexibility and processability are improved, but thermal stability deteriorates

Engineering Contradiction:

ImproveflexibilityVSAvoidthermal stability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent changes the chemical composition parameter by incorporating carbon-14-containing polypropylene resin instead of conventional polypropylene, and adds boron compound to achieve both flexibility and thermal stability simultaneously

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite resin composition containing EVOH, carbon-14-containing polypropylene resin, and boron compound, where the synergistic effect of components resolves the contradiction between flexibility and thermal stability

Inventive Principle:

Principle #40Composite materials

2Reliability

If carbon-14-containing polypropylene resin and boron compound are incorporated into EVOH resin composition to improve thermal stability, then thermal stability is improved, but composition complexity increases

Engineering Contradiction:

Improvethermal stabilityVSAvoidcomposition complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent specifies precise content ranges (polypropylene resin: 1-90 mass%, boron compound: 1-10000 ppm) to optimize thermal stability while controlling composition complexity within manageable parameters

Inventive Principle:

Principle #35Parameter changes

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The resulting resin composition exhibits improved thermal stability due to the strong binding energy of carbon-14-containing polypropylene and the synergistic effect of the boron compound, slowing decomposition and suppressing thermal degradation.

Implementation Method 1

the carbon-14-containing polypropylene resin exhibits stronger binding energy due to the primary isotope effect, leading to slowed decomposition and increased thermal stability

Methodology Applied

Scientific EffectPrimary isotope effect:

Implementation Method 2

a synergistic effect exists between the carbon-14 containing polypropylene resin and the boron compound (C) which has an effect of suppressing thermal degradation

Methodology Applied

Scientific EffectThermal degradation suppression:

Data Source

PatentUS20250361394A1Resin composition, molded body, sheet, film, bottle, tube, container, multilayer structure, and method for producing resin composition

Publication Date: 2025.11.27 MITSUBISHI CHEM CORP

AI summary

Provided is a resin composition comprising an ethylene-vinyl alcohol copolymer and a polypropylene resin having excellent thermal stability. The resin composition comprises an ethylene-vinyl alcohol copolymer (A), a carbon-14-containing polypropylene resin (B), and a boron compound (C).