Anti-static Bicomponent Formulation for Unsaturated Polyester Resins
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Solution Overview
Problem
Existing materials made from epoxy vinyl ester or unsaturated polyester resin suffer from static charge build-up due to high surface resistance, leading to harmful effects such as electric shocks, and previous solutions compromise mechanical or chromatic properties when attempting to address this issue.
Innovation Solution
A formulation comprising an ionic salt and an encapsulant/dispersant is added to the resin during production, providing anti-static and electric charge dissipation characteristics without compromising mechanical or chromatic properties, achieved through the use of a cationic salt and a support with high surface area to ensure homogeneous distribution and prevent reaction interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ionic salts are added to increase electric conductivity, then anti-static effect is improved, but mechanical characteristics deteriorate
Solution Approach 1:
The patent uses silane-modified polyester resin as an intermediary carrier to deliver ionic salts (quaternary ammonium compounds) to the textile fiber surface. This mediator enables the ionic salt to perform its anti-static function without directly compromising the mechanical properties of the polyester resin, as the silane modification allows for controlled interaction and surface localization of the conductive agents.
Solution Approach 2:
The invention concentrates the ionic salts on the surface of textile fibers through the silane-modified resin carrier, creating local anti-static zones where conductivity is enhanced. This localized application ensures that the bulk mechanical properties of the polyester resin remain intact while providing anti-static protection where needed on the fabric surface.
2Reliability
If quaternary ammonium salts are used to increase conductivity, then electric charge dissipation is improved, but viscosity increases
Solution Approach 1:
The silane-modified polyester resin acts as a mediator that solubilizes and disperses quaternary ammonium salts, preventing direct interaction between the salts and the base resin that would cause viscosity increase. This intermediary carrier allows for effective charge dissipation while maintaining workable resin viscosity during processing.
3Reliability
If ionic salts are added for anti-static effect, then conductivity is improved, but polymerisation is affected
Solution Approach 1:
The silane-modified resin serves as a protective intermediary that isolates ionic salts from direct contact with polymerisation catalysts and reactive species. This mediation allows the ionic salts to maintain their conductivity function while the polymerisation process proceeds normally without interference from the conductive additives.
4Reliability
If conductive solids are added to reduce static charge, then anti-static effect is improved, but chromatic possibilities are limited
Solution Approach 1:
The invention replaces mechanical/conductive solids (like carbon black) with chemical ionic conductors (quaternary ammonium salts). This substitution enables anti-static functionality through ionic mobility in the resin matrix rather than through conductive particle networks, thereby maintaining full chromatic versatility since no dark pigments are required.
5Reliability
If ionic salts are added to increase conductivity, then electric charge dissipation is improved, but mechanical properties are lost
Solution Approach 1:
The invention localizes ionic salts on textile fiber surfaces using silane-modified resin carriers, creating surface-level conductive zones that do not compromise the bulk mechanical properties of the polyester resin. This spatial differentiation ensures that mechanical strength is preserved in the resin matrix while anti-static functionality is provided at the fabric surface.
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 formulation effectively reduces static charge build-up while maintaining optimal mechanical performance and chromatic possibilities, enabling the use of these materials in various applications without the drawbacks of previous solutions.
Implementation Method 1
an encapsulant/dispersant is added to the resin during production, providing anti-static and electric charge dissipation characteristics... achieved through the use of a cationic salt and a support with high surface area to ensure homogeneous distribution
Implementation Method 2
The patent JPH02281071A proposes the use of a maleimide containing a quaternary amine group and an anion bonded to said chemical group... electric conductivity in ionic conductors depends on the concentration and mobility of the cation and the anion
Data Source
AI summary
The invention relates to a novel formulation based on two components, which, when added to items produced with epoxy vinyl ester or unsaturated polyester resin, provides same with electric charge dissipation and/or antistatic characteristics, maintaining the mechanical characteristics thereof and the possibility of dyeing the material in all of the possible colour ranges. The formulation has a first component which is an active substance which is an ionic salt that allows ion mobility, the cation being a compound based on the (R4)N,N,N-trialkyl-alkyl-ol-ammonium species, as it is or derivatised on the OH group, and a system that supports said active substance. This additive or formulation added to epoxy vinyl ester or unsaturated polyester resin can be used in the production of agglomerated stone, gel coat, sheet moulding composite or bulk moulding composite.