Antistatic Polymer Block Copolymer for Resin Wiping Resistance
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Solution Overview
Problem
Conventional antistatic agents for thermoplastic resins require large amounts to achieve sufficient antistatic performance and have persistence issues, with surface wiping reducing their effectiveness, leading to potential static-related contamination and operational problems in electronic devices.
Innovation Solution
A polymer compound with a block polymer structure comprising carboxyl groups at both ends, alternately bound with a hydroxyl-containing block and an epoxy compound, providing excellent antistatic properties in small quantities and maintaining effectiveness even after surface wiping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large amount of conventional antistatic agent is added to achieve sufficient antistatic performance, then the antistatic effect is improved, but the persistence and wiping resistance are reduced
Solution Approach 1:
The invention changes the chemical structure parameters of the antistatic agent by introducing a specific block copolymer architecture with polyolefin and hydrophilic polymer blocks. This structural modification enables the agent to achieve both high antistatic performance and improved persistence without requiring large amounts of additive.
Solution Approach 2:
The antistatic agent is designed as a composite block copolymer combining hydrophobic polyolefin blocks (for compatibility with thermoplastic resins) and hydrophilic polymer blocks (for antistatic functionality). This composite structure allows the material to simultaneously achieve good dispersion, strong adhesion, and persistent antistatic effect.
2Reliability
If a large amount of conventional antistatic agent is added to achieve sufficient antistatic performance, then the antistatic effect is improved, but the amount of substance required increases
Solution Approach 1:
The block copolymer structure changes the efficiency parameters of the antistatic agent, enabling it to achieve sufficient antistatic performance at lower concentrations. The hydrophilic blocks provide effective charge dissipation while the polyolefin blocks ensure compatibility, reducing the overall quantity needed.
Solution Approach 2:
The amphiphilic block copolymer structure enables the antistatic agent to self-assemble and self-position at the resin surface, with hydrophilic blocks orienting outward to provide antistatic function. This self-organizing behavior increases efficiency and reduces the total amount of substance required.
3Ease of manufacture
If the surface of resin molded article is wiped, then cleanliness is improved, but the antistatic effect is reduced
Solution Approach 1:
The block copolymer structure enables continuous antistatic action that persists through wiping. The strong adhesion of polyolefin blocks to the resin surface and the persistent hydrophilic nature of the hydrophilic blocks ensure that the antistatic effect is continuously maintained even after surface cleaning operations.
Solution Approach 2:
The invention creates an antistatic agent that resists being removed by wiping, effectively making the antistatic function long-lasting rather than disposable. The block copolymer structure ensures the agent remains on the surface through normal cleaning operations, eliminating the need for frequent reapplication.
4Ease of operation
If coating-type antistatic agent is used to achieve antistatic effect, then the application is simple, but the persistence is poor
Solution Approach 1:
The invention merges the advantages of coating-type agents (ease of application) with kneading-type agents (persistence) by designing a block copolymer that can be simply added to the resin and then achieves strong adhesion and persistent antistatic effect through its amphiphilic structure and self-assembly behavior.
Solution Approach 2:
The block copolymer performs self-service by automatically orienting and adhering to the resin surface through its amphiphilic structure, eliminating the need for complex coating processes while achieving persistent antistatic protection. The hydrophilic blocks naturally migrate to the surface to provide continuous antistatic function.
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 solution provides excellent antistatic performance with persistence and wiping resistance, preventing static-related contamination and maintaining effectiveness over time, thus enhancing the commercial value of thermoplastic resin products.
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 the block polymer (C) and an epoxy group of the epoxy compound (D)
Implementation Method 2
a block constituted by a polyester (A) having carboxyl groups at both ends and a block constituted by a compound (B) having hydroxyl groups at both ends are repeatedly and alternately bound via ester bonds formed by the carboxyl group and the hydroxyl group
Data Source
AI summary
Provided are: an antistatic agent which is capable of imparting excellent antistatic effect in a small amount and has sufficient persistence and wiping resistance; an antistatic agent composition; an antistatic resin composition; and a molded article. The antistatic agent comprises 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 the block polymer (C) and an epoxy group of the epoxy compound (D), the block polymer (C) having a structure comprising carboxyl groups at both ends, in which structure a block constituted by a polyester (A) having carboxyl groups at both ends and a block constituted by a compound (B) having hydroxyl groups at both ends are repeatedly and alternately bound via ester bonds formed by the carboxyl groups and the hydroxyl groups, and the epoxy compound (D) comprising two or more epoxy groups.