Block Polymer Antistatic Agent for Resin Composition
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional antistatic agents for thermoplastic resins require large amounts to achieve sufficient antistatic performance and have persistence issues, leading to surface contamination and dust adhesion problems.
Innovation Solution
A polymer compound with a block polymer structure, comprising a polyester with carboxyl groups at both ends and a polyhydric alcohol compound with multiple hydroxyl groups, bound via ester bonds, is used to create an antistatic agent that imparts excellent antistatic effects with persistence and wiping resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional antistatic agents are added in large amounts to achieve sufficient antistatic performance, then antistatic effect is improved, but surface contamination and dust adhesion occur
Solution Approach 1:
The invention changes the chemical structure parameters of the antistatic agent by introducing a specific block polymer architecture with polyether blocks and polyester blocks, along with polyhydric alcohol components. This structural modification enables achieving sufficient antistatic performance at lower concentrations (0.1-10 parts by mass per 100 parts resin) compared to conventional agents, thereby preventing surface contamination while maintaining reliable antistatic effects
Solution Approach 2:
The antistatic agent comprises a composite molecular structure combining polyether blocks (providing hydrophilicity and ion conduction), polyester blocks (providing structural framework and carboxyl groups), and polyhydric alcohol components. This composite structure at the molecular level synergistically delivers effective antistatic performance at low concentrations without causing surface contamination
2Reliability
If conventional antistatic agents are used to achieve antistatic effect, then electrical charge is reduced, but persistence and wiping resistance are insufficient
Solution Approach 1:
Instead of using small molecule antistatic agents that migrate and wear off easily, the invention inverts the approach by using a high molecular weight block polymer structure. The polymer chains with multiple hydroxyl groups and carboxyl groups form a persistent network within the resin matrix, providing long-lasting antistatic effects that resist washing and wiping while continuously dissipating electrical charge
Solution Approach 2:
The block polymer structure is pre-designed with multiple hydroxyl groups and carboxyl groups positioned along the polymer chains before incorporation into the resin. This preliminary structural arrangement ensures that the antistatic functional groups are optimally distributed and anchored within the resin matrix, providing persistent antistatic performance that maintains effectiveness over time and through cleaning operations
3Reliability
If thermoplastic resins are used for their excellent electrical insulation properties, then insulation performance is improved, but electrical charging by friction occurs
Solution Approach 1:
The invention applies local quality modification by incorporating the antistatic block polymer primarily at and near the surface region of the molded article. The hydrophilic polyether blocks and functional groups concentrate at the surface where they provide charge dissipation, while the bulk resin maintains its excellent insulation properties. This localized functional distribution allows the resin to simultaneously exhibit both good insulation in the bulk and antistatic properties at the surface
Solution Approach 2:
The invention changes the electrical parameters of the resin system by adding a controlled small amount (0.1-10 parts by mass per 100 parts resin) of the block polymer antistatic agent. This parameter modification introduces sufficient charge dissipation capability at the surface through the polymer's hydroxyl and carboxyl groups, while the overall electrical insulation properties of the thermoplastic resin bulk remain excellently preserved
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 provides effective antistatic performance in small amounts, maintaining resistance over time and preventing surface contamination and dust adhesion, thus enhancing the commercial value of thermoplastic resin molded articles.
Implementation Method 1
a block polymer (C) and a polyhydric alcohol compound (D) are bound via an ester bond formed by a carboxyl group of the block polymer (C) and a hydroxyl group of the polyhydric alcohol compound (D)
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 a polyhydric alcohol compound (D) are bound via an ester bond formed by a carboxyl group of the block polymer (C) and a hydroxyl group of the polyhydric alcohol 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 and hydroxyl groups, and the polyhydric alcohol compound (D) comprising three or more hydroxyl groups.