Chlorosulfonated Polyolefin Latex for Sodium-Alginate-Free Dip Molding
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Solution Overview
Problem
Existing methods for producing chlorosulfonated polyolefin gloves require the use of organic solvents and sodium alginate, which is undesirable from an environmental perspective, and there is a need for a method to produce dip-molded articles using a latex that does not contain sodium alginate for better viscosity control.
Innovation Solution
A chlorosulfonated polyolefin latex comprising specific surfactants with anionic and nonionic moieties, along with an aqueous dispersion medium, is used for dip molding without sodium alginate, utilizing a coagulant to form a coagulated film.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If sodium alginate is used in chlorosulfonated polyolefin latex for dip molding, then the latex can form a coagulated film, but the viscosity control becomes restricted and the production process becomes more complex
Solution Approach 1:
The invention extracts and removes sodium alginate from the latex composition, eliminating the thickening agent that restricted viscosity control. The patent achieves coagulated film formation without sodium alginate by using a simplified latex composition containing chlorosulfonated polyolefin, coagulant, and optional surfactants, thereby resolving the contradiction between manufacturing precision and device complexity
Solution Approach 2:
The invention changes the chemical composition parameters of the latex by replacing sodium alginate-based thickening with a coagulant-based film formation mechanism. This parameter change enables free viscosity control while maintaining the ability to form coagulated films, resolving the technical contradiction
2Productivity
If organic solvents are used in the production of chlorosulfonated polyolefin gloves, then the gloves can be produced effectively, but environmental protection is compromised
Solution Approach 1:
The invention changes the physical state parameter of the dispersion medium from organic solvent to aqueous solution. The latex composition uses water as the continuous phase instead of organic solvents, maintaining effective glove production while eliminating organic solvent pollution, thus resolving the contradiction between productivity and environmental protection
Solution Approach 2:
The invention converts the traditionally harmful organic solvent system into a beneficial aqueous system. By using water as the dispersion medium and coagulant-based film formation, the process transforms potential environmental harm into an environmentally friendly production method that maintains high productivity
3Strength
If coagulant treatment is applied to the mold surface, then rubber particles can adhere effectively, but the process requires additional steps
Solution Approach 1:
The invention merges the coagulant application step with the latex dipping step into a single combined operation. The mold is dipped directly into the latex composition containing the coagulant, allowing simultaneous adhesion and coagulation without separate coagulant treatment steps, thereby maintaining strong adhesion while reducing process complexity
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
This method allows for the production of dip-molded articles with enhanced strength and chemical resistance, free from sodium alginate, in a simple and solvent-free process.
Implementation Method 1
a surfactant having an anionic moiety and a nonionic moiety, the nonionic moiety containing a polyoxyalkylene chain, and the anionic moiety containing a carboxylic acid salt, a sulfonic acid salt, a carbonic acid ester salt, a sulfuric acid ester salt, or a phosphoric acid ester salt; and at least one surfactant selected from the group consisting of an amino acid-based surfactant, an alkyl aryl sulfonic acid-based surfactant, an alkyl sulfuric acid-based surfactant, and a sulfosuccinic acid-based surfactant
Implementation Method 2
adhering a coagulant to a surface of a mold having a desired shape; and dipping the mold with the coagulant adhered thereto into the composition for dip molding to form a coagulated film
Data Source
AI summary
Provided is a means for producing a dip-molded article comprising a chlorosulfonated polyolefin without using sodium alginate or the like. More specifically, provided is a chlorosulfonated polyolefin latex comprising: (A) a chlorosulfonated polyolefin; (B) a surfactant having an anionic moiety and a nonionic moiety, the nonionic moiety containing a polyoxyalkylene chain, and the anionic moiety containing a carboxylic acid salt, a sulfonic acid salt, a carbonic acid ester salt, a sulfuric acid ester salt, or a phosphoric acid ester salt; (C) at least one surfactant selected from the group consisting of an amino acid-based surfactant, an alkyl aryl sulfonic acid-based surfactant, an alkyl sulfuric acid-based surfactant, and a sulfosuccinic acid-based surfactant; and (D) an aqueous dispersion medium.