Polyether-Polyester Antistatic Resin Composition for Durable Transparency

The patent uses a block copolymer composed of polyolefin blocks and hydrophilic polymer blocks. This composite structure allows the hydrophilic blocks to provide antistatic functionality while the polyolefin blocks ensure compatibility with synthetic resins. The synergistic combination resolves the contradiction by integrating both durability and effectiveness in a single material system.

The patent optimizes the molecular weight, block length, and hydrophilic block content of the block copolymer. By adjusting these parameters, the agent achieves sufficient antistatic performance at lower concentrations while maintaining durability. Specifically, controlling the hydrophilic block content between 5-50 wt% and molecular weight between 1,000-100,000 enables effective antistatic action without requiring large amounts.

The block copolymer concentrates hydrophilic groups in specific hydrophilic blocks rather than distributing them uniformly throughout the entire polymer chain. This local concentration of functionality allows effective antistatic performance at the surface while the bulk polymer maintains compatibility with synthetic resins, preserving transparency and avoiding excessive addition.

The patent optimizes the hydrophilic block content between 5-50 wt% and molecular weight between 1,000-100,000. These parameter adjustments enable the agent to achieve sufficient antistatic effectiveness at lower concentrations (0.1-10 parts by mass per 100 parts of resin), maintaining compatibility and transparency without requiring large amounts.

The block copolymer agent is incorporated into the synthetic resin during molding, creating an intrinsic antistatic property rather than requiring external coating applications. The hydrophilic blocks naturally migrate to the surface during processing, providing self-generated antistatic functionality without introducing external organic coatings that would cause contamination.

The patent extracts the hydrophilic functional groups into separate hydrophilic polymer blocks within the block copolymer structure. These extracted hydrophilic blocks concentrate at the resin surface during molding, providing antistatic functionality without requiring external coating materials, thereby eliminating surface contamination from applied coatings.

The block copolymer combines polyolefin blocks (ensuring durability and compatibility) with hydrophilic polymer blocks (providing antistatic functionality). This composite structure enables simultaneous achievement of sufficient antistaticity and durability in film applications, as the polyolefin blocks maintain structural integrity while hydrophilic blocks provide lasting surface antistatic properties.

The patent optimizes molecular weight (1,000-100,000), block length ratios, and hydrophilic block content (5-50 wt%) to achieve the right balance between antistaticity and durability. These parameter adjustments ensure the agent provides sufficient antistatic effect while maintaining long-term durability in film applications without requiring excessive amounts.