Base for artificial leather
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Solution Overview
Problem
Polyesters synthesized from biomass-derived glycol exhibit poor thermostability during melt molding, leading to reduced intrinsic viscosity and undesirable properties in applications like artificial leather, due to decomposition reactions at high temperatures.
Innovation Solution
Incorporating a specific amount of 1,2-propanediol (15-500 ppm) and copolymerizing with polyethylene glycol and 5-sulfoisophthalic acid salt to enhance the thermostability of the polyester, which acts as a bidentate ligand to metal catalysts, limiting thermal decomposition without suppressing polymerization activity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polyester is synthesized from biomass-derived glycol, then environmental sustainability is improved, but thermostability during melt molding deteriorates
Solution Approach 1:
The patent changes the chemical composition parameters of the polyester by incorporating specific copolymerization components (1,2-propanediol at 15-500 ppm, polyethylene glycol at 0.01-5 mass%, and 5-sulfoisophthalic acid salt at 0.1-10 mol%). These parameter adjustments maintain environmental sustainability while improving thermostability during melt molding by modifying the polymer structure to resist thermal decomposition.
2Reliability
If polyester is synthesized from biomass-derived glycol, then environmental sustainability is improved, but intrinsic viscosity retention during melt molding deteriorates
Solution Approach 1:
The patent modifies the compositional parameters of the polyester by incorporating 1,2-propanediol-derived components (15-500 ppm), polyethylene glycol (0.01-5 mass%), and 5-sulfoisophthalic acid salt (0.1-10 mol%). These parameter changes create a polymer structure that maintains higher intrinsic viscosity during melt molding while preserving the environmental benefits of biomass-derived glycol.
3Reliability
If polyester is synthesized from biomass-derived glycol, then environmental sustainability is improved, but abrasion resistance of the product deteriorates
Solution Approach 1:
The patent adjusts the chemical composition parameters by incorporating 1,2-propanediol (15-500 ppm), polyethylene glycol (0.01-5 mass%), and 5-sulfoisophthalic acid salt (0.1-10 mol%). These compositional modifications enhance the molecular structure to provide better abrasion resistance in the final product while maintaining environmental sustainability.
4Reliability
If polyester is synthesized from biomass-derived glycol, then environmental sustainability is improved, but decomposition resistance at high temperature deteriorates
Solution Approach 1:
The patent modifies the polyester composition by incorporating 1,2-propanediol-derived components (15-500 ppm), polyethylene glycol (0.01-5 mass%), and 5-sulfoisophthalic acid salt (0.1-10 mol%). These parameter changes create a more thermally stable polymer structure that resists decomposition at high temperatures during melt molding while preserving the environmental benefits of using biomass-derived glycol.
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 approach results in a polyester with improved thermostability during melt molding, maintaining intrinsic viscosity and providing excellent abrasion resistance, reducing machine soiling and foreign matter generation, and enhancing production efficiency.
Implementation Method 1
1,2-propanediol, an impurity present in biomass-derived glycol, provided the polyester with better thermostability during melt molding than a polymer obtained from fossil resource-based glycol-i.e. successfully limiting the reduction in its intrinsic viscosity during melt molding-when kept in a certain amount range rather than merely removed as an impurity
Data Source
AI summary
Provided is a base body for an artificial leather comprising a polyester excellent in thermostability during melt molding. That is, provided is a conjugated fiber comprising a polyester which exhibits only a small reduction in intrinsic viscosity during melt molding. The base body for an artificial leather comprises an intertwined fiber body mainly comprising an ultrafine fiber having a 0.01 to 10 µm fiber diameter and an elastic polymer, the ultrafine fiber comprising, as a constituent polymer, a polyester obtained from a dicarboxylic acid and/or an ester-forming derivative thereof, and a diol, the polyester containing 15 to 500 ppm of a 1,2-propanediol-derived component.