Ethylene Polymer with Carbon Monoxide Units for Melt Strength

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Solution Overview

Problem

Conventional low density polyethylene (LDPE) lacks improved melt strength and adhesion to substrates such as cellulosic materials and metalized films, limiting its effectiveness in film and extrusion coating applications.

Innovation Solution

An ethylene-based polymer composition incorporating units derived from Carbon Monoxide (CO) and Rheology Modifying Agents, specifically designed to enhance melt strength and adhesion by adjusting the molecular structure and distribution of carbonyl groups and comonomers during polymerization.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If conventional low density polyethylene (LDPE) is used, then processability is good, but melt strength is insufficient

Engineering Contradiction:

Improvemelt strengthVSAvoidprocessability

Core Design Contradiction:

StrengthVSEase of operation

Solution Approach 1:

The patent changes the chemical composition parameters by incorporating carbon monoxide units (0.1-10 wt%) and rheology modifying agents (0.01-5 wt%) into the ethylene-based polymer, thereby improving melt strength while maintaining processability through controlled compositional modification

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite polymer system by combining ethylene-based polymer chains with carbon monoxide-derived units and rheology modifying agent units, forming a multi-component material that exhibits both improved melt strength and retained processability

Inventive Principle:

Principle #40Composite materials

2Reliability

If conventional low density polyethylene (LDPE) is used, then processability is good, but adhesion to substrates is insufficient

Engineering Contradiction:

Improveadhesion to substratesVSAvoidprocessability

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent modifies the chemical composition by incorporating carbon monoxide units and rheology modifying agents that introduce polar groups and functional moieties, thereby enhancing adhesion to substrates while maintaining extrusion processability through controlled compositional adjustment

Inventive Principle:

Principle #35Parameter changes

3Strength

If high molecular weight polymers are produced, then polymer performance is improved, but melt index control becomes restricted

Engineering Contradiction:

Improvepolymer performanceVSAvoidmelt index control

Core Design Contradiction:

StrengthVSProductivity

Solution Approach 1:

The patent introduces rheology modifying agents as intermediary components that mediate between high molecular weight polymer chains and the processing requirements, enabling both high polymer performance and adequate melt index control through the modifying agent's rheological influence

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS10654955B2Ethylene-based polymers comprising units derived from carbon monoxide and a rheology modifying agent

Publication Date: 2020.05.19 DOW GLOBAL TECHNOLOGIES LLC

AI summary

The invention provides a composition comprising an ethylene-based polymer, comprising at least the following: A) a unit derived from Carbon Monoxide (CO); and B) a unit derived from at least one Rheology Modifying Agent (RMA) selected from the following RMA1, RMA2, RMA3, RMA4, RMA5, each as described herein, or a combination thereof.