Polycarbonate Flame Retardant Composition Using Perfluoroalkyl Sulfonate

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Solution Overview

Problem

Current polycarbonate films used in electrical and electronic insulation applications require high flame retardancy, especially bromine and chlorine-free alternatives that meet V0 or VTM0 ratings at specific thicknesses, due to stricter environmental regulations and performance demands.

Innovation Solution

A thermoplastic composition comprising polycarbonate, mineral filler, inorganic acid or acid salt, anti-drip agent, and a flame retardant featuring perfluoroalkyl sulfonate salt or a combination of aromatic phosphate ester and polycarbonate-siloxane block copolymer, which enhances flame retardance and mechanical properties.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If brominated flame retardants are used to achieve V0/VTM0 flame retardant rating, then flame retardant performance is improved, but environmental protection and regulatory compliance deteriorate due to bromine and chlorine restrictions

Engineering Contradiction:

Improveflame retardant performanceVSAvoidenvironmental harm from bromine and chlorine

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent changes the chemical composition parameters by replacing brominated flame retardants with chlorine-free alternatives including perfluoroalkyl sulfonate salts, aromatic phosphate esters, and polycarbonate-siloxane block copolymers. This parameter change achieves the same V0/VTM0 flame retardant rating while eliminating harmful bromine and chlorine content, thus resolving the contradiction between flame retardant performance and environmental protection

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs composite flame retardant systems combining multiple components: perfluoroalkyl sulfonate salts, aromatic phosphate esters, and polycarbonate-siloxane block copolymers. This composite approach synergistically achieves high flame retardant performance (V0/VTM0 rating) while maintaining chlorine-free and bromine-free composition, thereby satisfying both performance requirements and environmental regulations

Inventive Principle:

Principle #40Composite materials

2Reliability

If flame retardant additives are incorporated to achieve V0/VTM0 rating, then flame retardant performance is improved, but mechanical properties and degradation resistance may deteriorate

Engineering Contradiction:

Improveflame retardant ratingVSAvoidmechanical properties

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The patent optimizes the concentration parameters of flame retardant additives, using perfluoroalkyl sulfonate salts at 0.01-5 wt%, aromatic phosphate esters at 0.01-5 wt%, and polycarbonate-siloxane block copolymers at 0.01-5 wt%. These optimized parameter ranges achieve V0/VTM0 flame retardant ratings while minimizing negative impacts on mechanical properties and degradation resistance through controlled additive levels

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent develops a composite flame retardant system where perfluoroalkyl sulfonate salts, aromatic phosphate esters, and polycarbonate-siloxane block copolymers work synergistically. This composite formulation achieves high flame retardant performance (V0/VTM0) while the specific combination and concentration ranges preserve mechanical properties and reduce degradation, resolving the contradiction between flame retardancy and material integrity

Inventive Principle:

Principle #40Composite materials

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 composition achieves V0 or VTM0 ratings at specified thicknesses, maintains mechanical integrity, and exhibits reduced degradation, outperforming compositions without these additives or using different flame retardants.

Implementation Method 1

a flame retardant comprising a perfluoroalkyl sulfonate salt or a combination of an aromatic phosphate ester and a polycarbonate-siloxane block copolymer

Methodology Applied

Scientific EffectFlame retardancy:

Data Source

PatentUS9458315B2Flame retardant thermoplastic polycarbonate compositions and films made therefrom

Publication Date: 2016.10.04 SABIC GLOBAL TECHNOLOGIES BV

AI summary

Described herein is a thermoplastic composition comprising a polycarbonate, a mineral filler, inorganic acid or acid salt, an anti-drip agent, and a flame retardant comprising a perfluoroalkyl sulfonate salt or a combination of an aromatic phosphate ester and a polycarbonate-siloxane block copolymer.