Polyamide Composition for Warm Water Oxidation Resistance

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional polyamides have poor resistance to oxidizing agents and release substances in warm water applications, making them unsuitable for warm drinking water applications without exceeding health and quality standards.

Innovation Solution

A polyamide composition comprising aliphatic or semiaromatic polyamides with a C/CONH ratio greater than 6, combined with polyolefins and/or phenyl ether polymers, along with compatibilizers and thermal stabilizers, to reduce substance release and enhance resistance to oxidizing agents.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional polyamide granules are used to ensure good processability and surface quality, then injection molding can proceed smoothly, but bacterial contamination occurs during storage before processing

Engineering Contradiction:

Improvesurface qualityVSAvoidbacterial contamination

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

An antibacterial master batch containing antibacterial agents is introduced as an intermediary substance. This master batch is mixed with the polyamide granules to create a composite material that maintains good processability and surface quality while providing continuous antibacterial protection during storage and processing

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent creates a composite material by combining polyamide granules with antibacterial agents in a master batch system. This composite approach allows the material to simultaneously exhibit good injection molding properties and antibacterial activity, resolving the contradiction between surface quality and bacterial contamination prevention

Inventive Principle:

Principle #40Composite materials

2Reliability

If antibacterial master batch is mixed with polyamide granules, then bacterial contamination is prevented, but the mixing process becomes more complex

Engineering Contradiction:

Improveantibacterial effectVSAvoidmixing process

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The antibacterial agents are pre-mixed into a master batch before being combined with the polyamide granules. This preliminary action concentrates the antibacterial components in a manageable form, simplifying the subsequent mixing process and ensuring uniform distribution without requiring complex mixing equipment or procedures

Inventive Principle:

Principle #10Preliminary action

3Ease of manufacture

If polyamide granules are stored in bags, then storage is convenient, but condensation occurs during storage

Engineering Contradiction:

Improvestorage convenienceVSAvoidcondensation

Core Design Contradiction:

Ease of manufactureVSTemperature

Solution Approach 1:

Silica gel packets are introduced as intermediary desiccants placed within the storage bags. These packets absorb excess moisture and prevent condensation on the polyamide granules during storage, maintaining a dry environment while preserving the convenience of bag storage

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

Silica gel, a porous material with high surface area, is used to absorb moisture from the storage environment. The porous structure provides numerous absorption sites for water molecules, effectively preventing condensation while maintaining storage convenience

Inventive Principle:

Principle #31Porous materials

Data Source

PatentEP4048734B1Polyamide composition

Publication Date: 2026.05.20 BASF SE

AI summary

The present invention relates to polyamide compositions having decreased release of substances in warm water and increase resistance to oxidizing agents and which therefore are suitable for warm water applications, in particular for warm drinking water applications.