Non-solvent PU system, an artificial leather comprising the same and a process for producing the artificial leather
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Solution Overview
Problem
Existing non-solvent polyurethane systems for artificial leather require high curing temperatures, typically above 110°C, and often use organotin catalysts, which are not eco-friendly.
Innovation Solution
A non-solvent polyurethane system incorporating a polyol composition with a non-tin metal compound, such as zinc, bismuth, or calcium, and an amine-based catalyst, allowing for curing at temperatures of 100°C or below, while maintaining good peeling strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If organotin catalysts and high curing temperatures (above 110°C) are used, then good curing property is achieved, but environmental friendliness deteriorates and energy consumption increases
Solution Approach 1:
The patent changes the chemical composition parameters of the catalyst system by replacing organotin compounds with non-tin metal compounds (zinc, bismuth, calcium) combined with amine-based catalysts. This parameter change enables effective curing at lower temperatures (60-100°C) while improving environmental compatibility by eliminating toxic organotin substances.
Solution Approach 2:
The patent employs a composite catalyst system combining non-tin metal compounds with amine-based catalysts. This composite approach synergistically enhances curing performance at lower temperatures while maintaining environmental friendliness, resolving the contradiction between effective curing and eco-friendly requirements.
2Reliability
If organotin catalysts and high curing temperatures (above 110°C) are used, then good curing property is achieved, but energy consumption increases
Solution Approach 1:
The patent modifies the catalyst system composition to enable curing at reduced temperatures (60-100°C compared to traditional 110-150°C). This parameter change in curing temperature directly reduces energy consumption while the enhanced catalyst system maintains adequate curing properties.
3Object-affected harmful factors
If non-tin metal compounds with amine-based catalysts are used, then environmental friendliness and lower curing temperature are achieved, but curing effectiveness may deteriorate
Solution Approach 1:
The patent creates a composite catalyst system where non-tin metal compounds work synergistically with amine-based catalysts. This composite approach compensates for the individually lower catalytic activity of non-tin metals, achieving effective curing properties while maintaining environmental friendliness.
Solution Approach 2:
The patent optimizes the composition ratios and types of non-tin metal compounds combined with specific amine-based catalysts to enhance the overall catalytic activity, ensuring adequate curing effectiveness is achieved despite using environmentally friendly catalysts at lower temperatures.
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 system achieves effective curing and peeling strength at lower temperatures, reducing energy consumption and environmental impact by eliminating the need for organotin catalysts.
Implementation Method 1
the polyol composition (B) comprises catalysts of at least a non-tin metal compound with an amine-based catalyst
Data Source
AI summary
Disclosed herein is a non-solvent polyurethane system, which includes catalysts of at least a non-tin metal compound with an amine-based catalyst. Further disclosed herein is an artificial leather including a top coat, a first polyurethane layer made from the non-solvent polyurethane system, optionally a further polyurethane layer and optionally a substrate layer. Additionally disclosed herein is a process for producing an artificial leather thereof.