Phenylphosphonate Nucleating Agent for Polyolefin Crystallization

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Solution Overview

Problem

Current thermoplastic materials, such as polyolefins, lack effective nucleating agents that enhance stiffness, heat deflection temperature, cycle time, shrinkage behavior, haze, clarity, strength, and impact resistance.

Innovation Solution

Incorporating a nucleating agent comprising a metal salt of phenylphosphonic acid with primary particles having a mean aspect ratio of about two or more, combined with an acid scavenger like metal salts of stearic acid, into thermoplastic compositions to improve processing and properties.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If conventional nucleating agents are used in thermoplastic materials, then processing is simplified, but mechanical properties such as stiffness, heat deflection temperature, strength, and impact resistance are insufficient

Engineering Contradiction:

Improvemechanical propertiesVSAvoidprocessing effectiveness

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

The patent changes the chemical composition parameters by introducing metal salts of phenylphosphonic acid as nucleating agents, which fundamentally alters the crystallization behavior and mechanical properties of thermoplastic materials, transforming them from conventional to enhanced performance materials

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates composite materials by combining thermoplastic base materials with metal salt nucleating agents (such as calcium phenylphosphonate, zinc phenylphosphonate, magnesium phenylphosphonate), resulting in synergistic materials that exhibit improved mechanical properties, heat resistance, and crystallization characteristics

Inventive Principle:

Principle #40Composite materials

2Productivity

If conventional nucleating agents are used, then manufacturing is straightforward, but cycle time is extended and productivity is reduced

Engineering Contradiction:

Improvecycle timeVSAvoidmanufacturing simplicity

Core Design Contradiction:

ProductivityVSEase of manufacture

Solution Approach 1:

The patent modifies the nucleation kinetics parameters through the use of metal salt phenylphosphonate compounds, which accelerate crystallization rates and reduce cycle times while maintaining ease of manufacture through simple mixing processes

Inventive Principle:

Principle #35Parameter changes

3Illumination intensity

If conventional nucleating agents are used, then processing is simple, but haze increases and clarity decreases

Engineering Contradiction:

Improvehaze and clarityVSAvoidprocessing complexity

Core Design Contradiction:

Illumination intensityVSEase of manufacture

Solution Approach 1:

The patent changes the optical properties parameters by controlling crystal size and distribution through metal salt nucleating agents, which reduce light scattering and minimize haze while maintaining processing simplicity

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent applies local quality control by ensuring uniform distribution of nucleating agent particles throughout the thermoplastic matrix, creating localized crystallization zones that optimize both optical clarity and mechanical properties

Inventive Principle:

Principle #3Local quality

4Strength

If conventional nucleating agents are used, then production is straightforward, but flexural moduli are insufficient

Engineering Contradiction:

Improveflexural moduliVSAvoidproduction simplicity

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

The patent develops composite materials combining thermoplastic polymers with metal salt phenylphosphonate nucleating agents, where the composite structure enhances flexural moduli and structural rigidity while maintaining straightforward production processes

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent modifies the mechanical property parameters by introducing nucleating agents that promote formation of larger, more stable crystals, thereby increasing flexural moduli and structural stiffness without complicating manufacturing

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 thermoplastic compositions exhibit improved mechanical properties, reduced haze, increased flexural moduli, and enhanced impact resistance, while allowing for faster processing with reduced cycle times.

Implementation Method 1

the nucleating agent can comprise a metal salt of a phenylphosphonic acid

Methodology Applied

Scientific EffectNucleation: Nucleation

Implementation Method 2

The acid scavenger can be selected from the group consisting of metal salts of stearic acid

Methodology Applied

Scientific EffectAcid scavenging: Absorption (physical)

Data Source

PatentUS8835542B2Nucleating agent and thermoplastic compositions comprising the same

Publication Date: 2014.09.16 MILLIKEN & CO

AI summary

A composition comprises a thermoplastic and a nucleating agent. The thermoplastic can be a polyolefin selected from the group consisting of polypropylene homopolymers, polypropylene copolymers, polyethylene, polyethylene copolymers, polybutylene, poly(4 methyl 1 pentene) and mixtures thereof. The nucleating agent can comprise a metal salt of a phenylphosphonic acid. The nucleating agent can comprise primary particles having a mean aspect ratio of about two or more. The composition can also comprise an acid scavenger, such as one or more metal salts of stearic acid. The composition can be used to produce thermoplastic articles using, for example, injection molding and thermoforming techniques.