Polyolefin Resin Modifier Copolymer Wettability Strength
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Solution Overview
Problem
Polyolefin resins exhibit poor wettability and adhesiveness due to their non-polar nature, leading to issues with aqueous coating applications and mechanical strength degradation when surfactants are used to improve wettability.
Innovation Solution
A modifier for polyolefin resin comprising a copolymer with a polyolefin and unsaturated dicarboxylic acid anhydride, which imparts excellent wettability without compromising mechanical strength, achieved through specific copolymerization and molecular weight control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If surfactant is added to polyolefin resin composition to improve wettability, then wettability is improved, but mechanical strength is impaired and surfactant bleed out occurs
Solution Approach 1:
The patent uses a specific copolymer as an intermediary substance between the polyolefin resin and water. This copolymer contains both hydrophobic polyolefin segments and hydrophilic carboxyl groups, allowing it to act as a mediator that improves wettability without requiring external surfactants that would compromise mechanical strength or cause bleed out.
Solution Approach 2:
The invention creates a composite material system by incorporating a copolymer with specific composition (polyolefin and carboxyl-containing monomer) into the polyolefin resin. This composite approach combines the hydrophobic properties of polyolefin with the hydrophilic properties of carboxyl groups, achieving improved wettability while maintaining the mechanical integrity of the base resin.
2Ease of operation
If corona treatment or plasma treatment is applied to polyolefin resin surface to improve wettability, then wettability is improved, but wettability decreases over time
Solution Approach 1:
The patent applies preliminary action by incorporating the hydrophilic copolymer into the resin composition before molding. This ensures that the wettability-imparting components are already present and uniformly distributed in the material, providing immediate and lasting wettability improvement without requiring subsequent surface treatments that would otherwise be needed.
Solution Approach 2:
The copolymer-containing resin composition is self-sufficient in providing wettability. The hydrophilic carboxyl groups within the copolymer structure inherently provide the wettability function, eliminating the need for external surface treatments like corona or plasma treatment, and this effect is permanently built into the material structure.
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 modified polyolefin resin exhibits enhanced water wettability and durability while maintaining original mechanical strength, suitable for various applications including coatings and wood-plastic composites.
Implementation Method 1
a copolymer (X) having a polyolefin (A) and an unsaturated dicarboxylic acid (anhydride) (B) as a constitutional unit
Implementation Method 2
the polyolefin resin is a high-molecular substance that has no polar group in its molecule, so-called non-polar... the modifier imparts excellent wettability for water to a polyolefin resin substrate
Data Source
AI summary
Provided are a modifier for polyolefin resin which imparts excellent wettability for water, etc. to a polyolefin resin substrate without decreasing the resin property of the polyolefin resin substrate composed of polyolefin resin, and a polyolefin resin composition containing the modifier and a polyolefin resin. The present invention relates to a modifier for polyolefin resin (K) containing a copolymer (X) having a polyolefin (A) and an unsaturated dicarboxylic acid (anhydride) (B) as a constitutional unit and having an acid value of 50 to 250 mg KOH/g.