Biodegradable Nitrile Latex via Polyester Polyol Crosslinking
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Solution Overview
Problem
Conventional nitrile-based copolymer latex gloves cause allergic reactions due to the use of sulfur and vulcanizing accelerators, and they are not biodegradable, leading to environmental contamination.
Innovation Solution
A latex composition for dip-forming using a polyester polyol as a crosslinking agent without sulfur or vulcanizing accelerators, which provides excellent biodegradability and maintains mechanical properties such as tensile strength, elongation, and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If sulfur and vulcanizing accelerators are used in nitrile-based copolymer latex, then mechanical strength and durability are improved, but allergic reactions occur and biodegradability is lost
Solution Approach 1:
The patent removes sulfur and vulcanizing accelerators from the latex composition, extracting the harmful components while maintaining the essential mechanical properties through alternative crosslinking mechanisms that do not involve these harmful substances
Solution Approach 2:
The patent changes the chemical parameters of the latex composition by using alternative crosslinking agents and modifying the polymer structure, allowing the material to achieve mechanical strength without sulfur-based vulcanization, thus eliminating allergic reactions while maintaining durability
2Strength
If sulfur and vulcanizing accelerators are used in nitrile-based copolymer latex, then mechanical strength and durability are improved, but environmental contamination increases
Solution Approach 1:
The patent extracts and eliminates sulfur and vulcanizing accelerators from the latex composition, removing the sources of environmental contamination while preserving the mechanical durability through alternative crosslinking methods that are environmentally benign
Solution Approach 2:
The patent modifies the chemical composition parameters to use eco-friendly crosslinking agents and polymer structures that maintain durability without generating harmful environmental contaminants, enabling biodegradability while preserving mechanical properties
3Strength
If conventional nitrile-based copolymer latex is used, then mechanical strength is improved, but biodegradability is lost
Solution Approach 1:
The patent changes the chemical composition parameters by using biodegradable crosslinking agents and modifying the polymer structure to enable biological degradation while maintaining mechanical strength through alternative crosslinking mechanisms that do not compromise biodegradability
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 latex composition achieves biodegradability and maintains mechanical properties equivalent to conventional vulcanized articles, preventing allergic reactions and environmental harm.
Implementation Method 1
a polyester polyol as a crosslinking agent
Data Source
AI summary
A latex composition for dip-forming, comprises a copolymer latex obtained by polymerizing a monomer mixture of a conjugated diene-based monomer, an ethylenically unsaturated nitrile monomer and an ethylenically unsaturated acid monomer; and a polyester polyol. Further disclosed is a method for preparing a dip-formed article and a dip-formed article prepared therefrom.