Olefin-based interpolymers and tackifier compositions

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Solution Overview

Problem

There is a need for compositions suitable for polyolefin elastomer (POE)-based leather products that offer excellent performance properties, including high bally flex resistance, softness, and flowability, which are challenging to achieve simultaneously.

Innovation Solution

A composition comprising at least one olefin-based interpolymer with a melt index (I2) ≤ 30 dg/min or melt flow rate (MFR) ≤ 30 dg/min, combined with a tackifier, resulting in a final composition with a melt index (I2) ≤ 10 g/10 min.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If POE-based leather compositions are used to achieve eco-friendliness and recyclability, then environmental sustainability is improved, but performance properties such as bally flex resistance, softness, and flowability are difficult to achieve simultaneously

Engineering Contradiction:

Improveenvironmental sustainabilityVSAvoidperformance properties

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The patent uses composite materials by combining POE resin with specific additives including processing aids, lubricants, and crosslinking agents to create a multi-component composition that achieves both environmental sustainability and excellent performance properties like bally flex resistance, softness, and flowability

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent applies parameter changes by carefully controlling the melt index of the POE resin (specifically using resins with melt index between 0.5-10 g/10min at 190°C) and adjusting the composition ratios of various additives to optimize the balance between environmental benefits and performance characteristics

Inventive Principle:

Principle #35Parameter changes

2Strength

If POE resin with low melt index is used to improve bally flex resistance and softness, then mechanical performance is improved, but processing flowability deteriorates

Engineering Contradiction:

Improvebally flex resistanceVSAvoidprocessing flowability

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

The patent introduces processing aids and lubricants as intermediary substances that mediate between the low-melt-index POE resin and the processing equipment, enabling the resin to maintain its excellent bally flex resistance and softness while improving processing flowability during manufacturing

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent optimizes the melt index parameter of the POE resin to a specific range (0.5-10 g/10min at 190°C) and adjusts processing temperature and additive concentrations to achieve the desired balance between mechanical performance and processing ease

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20250059361A1Olefin-based interpolymers and tackifier compositions

Publication Date: 2025.02.20 DOW GLOBAL TECHNOLOGIES LLC

AI summary

A composition comprising at least the following components: a) at least one olefin-based interpolymer that comprises the following properties: i) a melt index (I2)≤30 dg/min or a melt flow rate (MFR)≤30 dg/min, b) a tackifier; and wherein the composition has a melt index (I2)≤10 g/10 min.