Antistatic Polymer via Ester Bonding for Resin Compatibility
Solution Overview
Problem
Conventional antistatic agents for thermoplastic resins require large amounts to achieve sufficient antistatic performance, are not persistent, and can impair the intrinsic physical properties of resins, while also being prone to surface contamination and dust adhesion due to static electricity.
Innovation Solution
A polymer compound comprising a diol, aliphatic dicarboxylic acid, aromatic dicarboxylic acid, a compound with hydroxyl groups at both ends, and an epoxy compound bound via ester bonds, along with alkali metal salts or Group II element salts, is used to create an antistatic agent that provides excellent antistatic effects in small amounts with persistence and wiping resistance without compromising the resin's physical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional antistatic agents are added in large amounts to achieve sufficient antistatic performance, then the antistatic effect is improved, but the intrinsic physical properties of the resin are impaired
Solution Approach 1:
The invention changes the chemical structure parameters of the antistatic agent by introducing specific functional groups (carboxyl groups at both ends of block polymer, epoxy groups) that enable effective interaction with thermoplastic resins at low concentrations, thereby achieving sufficient antistatic performance without impairing resin properties
Solution Approach 2:
The invention creates a composite antistatic agent system combining block polymer (C) with epoxy compound (D) through ester bond formation, producing a new compound (E) that synergistically provides both antistatic functionality and compatibility with thermoplastic resins, allowing effective use at 0.1-10 parts by mass per 100 parts of resin
2Reliability
If conventional antistatic agents are used, then initial antistatic effect is achieved, but the antistatic effect is not persistent and is reduced by wiping
Solution Approach 1:
The invention performs preliminary chemical modification by forming ester bonds between carboxyl groups of block polymer (C) and epoxy groups of compound (D) before application to the resin, creating a stable compound (E) that ensures persistent antistatic effect resistant to wiping and environmental factors
Solution Approach 2:
The ester bond acts as a stable intermediary linkage between the hydrophilic block polymer and the epoxy compound, creating a chemically bonded compound (E) that maintains structural integrity during wiping and provides durable antistatic performance
3Reliability
If coating-type antistatic agents are coated on the surface of resin molded articles, then antistatic effect is provided, but the persistence is poor and surface contamination occurs
Solution Approach 1:
The invention extracts the persistence problem by transitioning from surface coating to bulk incorporation, integrating the antistatic agent compound (E) into the resin matrix during molding, thereby eliminating the persistence issue inherent in coating methods while maintaining effective antistatic performance
Solution Approach 2:
The invention creates a masterbatch or molded article with built-in antistatic properties, effectively copying the antistatic function into the resin structure itself, eliminating the need for separate coating applications and ensuring long-lasting effect
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 antistatic agent effectively reduces static electricity in thermoplastic resins, maintaining their physical properties and preventing surface contamination, even after wiping, thus enhancing the commercial value and performance of molded articles.
Implementation Method 1
a polymer compound (E) having a structure in which a block polymer (C) and an epoxy compound (D) are bound via an ester bond formed by a carboxyl group of said block polymer (C) and an epoxy group of said epoxy compound (D)
Data Source
AI summary
Provided are: an antistatic agent and an antistatic agent composition which are capable of providing excellent antistatic effect in a small amount and have sufficient persistence and wiping resistance without impairing the intrinsic physical properties of a resin; and an antistatic resin composition and a molded article using the same. The antistatic agent includes a polymer compound (E) having a structure in which a diol, an aliphatic dicarboxylic acid, an aromatic dicarboxylic acid, a compound (B) which comprises at least one group represented by the following Formula (1) and has hydroxyl groups at both ends, and an epoxy compound (D) having two or more epoxy groups are bound via ester bonds: