1,6-Hexanediol Composition for Polymer Hydrolysis Resistance

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Solution Overview

Problem

Existing 1,6-hexanediol compositions do not adequately enhance the hydrolysis resistance of polymers such as polyesters and polyurethanes, which are used in applications like artificial leathers.

Innovation Solution

A 1,6-hexanediol composition containing specific amounts of an alkali metal element and having a controlled acid value, which when used as a reaction raw material, produces polymers with improved hydrolysis resistance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional 1,6-hexanediol composition is used for polymer production, then the production process is simple, but the hydrolysis resistance of the polymer is insufficient

Engineering Contradiction:

Improvehydrolysis resistanceVSAvoidproduction process complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The invention changes the chemical composition parameters of the 1,6-hexanediol by controlling the acid value to 0.001 to 1.0 mg KOH/g and alkali metal element content to 0.1 to 1000 ppm. This parameter optimization improves the hydrolysis resistance of resulting polymers without requiring complex additional production steps.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention performs preliminary purification and composition control during the 1,6-hexanediol production stage itself, rather than requiring subsequent treatment of the polymer. By controlling acid value and alkali metal content in the diol composition beforehand, the polymer inherently gains improved hydrolysis resistance.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If solid acid catalyst is used to produce polyester polyol with excellent hydrolysis resistance, then the hydrolysis resistance is improved, but the production process becomes more complex requiring special catalyst recovery

Engineering Contradiction:

Improvehydrolysis resistanceVSAvoidmanufacturing ease

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The invention extracts and controls specific composition parameters (acid value and alkali metal content) from the conventional 1,6-hexanediol production process. By isolating and optimizing these specific parameters, the invention achieves improved polymer hydrolysis resistance without requiring the addition of complex solid catalyst recovery systems.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Instead of using expensive solid acid catalysts that require recovery and regeneration systems, the invention uses a simple compositional adjustment of readily available 1,6-hexanediol materials. This approach achieves similar or better hydrolysis resistance without the need for complex catalyst management infrastructure.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Data Source

PatentEP4559892A11,6-hexanediol composition and polymer

Publication Date: 2025.05.28 DIC CORP

AI summary

[Problem] An object of the present invention is to provide a 1,6-hexanediol composition that can improve the hydrolysis resistance of a polymer obtained using a 1,6-hexanediol composition as a reaction raw material, and a polymer obtained by reacting the 1,6-hexanediol composition. [Means for Resolution] The invention relates to a 1,6-hexanediol composition containing either or both of 1,6-hexanediol and a 1,6-hexanediol derivative, and an alkali metal element, in which the total content of the alkali metal element with respect to the total amount of the composition is in the range of 0.1 to 1000 ppm by mass, and the composition has an acid value in the range of 0.001 to 1.0 mg KOH/g.