Surface Treatment Liquid Adhesion via Block Copolymer Structure

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Solution Overview

Problem

Conventional surface treatment agents lack sufficient adhesiveness to the treated object's surface, leading to inconsistent or decreased surface treatment effects due to peeling of the resin.

Innovation Solution

A surface treatment liquid comprising a resin with constituent units derived from compounds having hydrophilic groups and ethylenic double bonds, along with a nitrogen-containing heterocyclic group, enhancing adhesion and maintaining desired hydrophilicity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional surface treatment agents are used, then surface treatment effect is achieved, but adhesiveness to the surface is insufficient causing peeling

Engineering Contradiction:

Improvesurface treatment effectVSAvoidadhesiveness

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The patent uses a block copolymer consisting of a polyvinyl alcohol resin block having mercapto group and a polyanionic resin block, creating a composite material structure where the polyvinyl alcohol block provides adhesion through mercapto groups and the polyanionic block provides surface treatment functionality, thereby achieving both strong adhesiveness and effective surface treatment

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The invention applies different functional blocks at different locations within the polymer structure: the polyvinyl alcohol resin block with mercapto groups is positioned to provide adhesion to the substrate, while the polyanionic resin block is positioned to provide the surface treatment effect, allowing each part to perform its specific function optimally

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If resin is applied to achieve surface treatment, then hydrophilicity is adjusted, but resin peels from surface causing effect to decrease

Engineering Contradiction:

Improvehydrophilicity adjustmentVSAvoidsurface treatment durability

Core Design Contradiction:

Adaptability or versatilityVSDuration of action of stationary object

Solution Approach 1:

The block copolymer structure combines polyvinyl alcohol resin block with mercapto groups for strong adhesion and polyanionic resin block for hydrophilicity adjustment, ensuring both the surface treatment effect and its durability by preventing peeling through the adhesive polyvinyl alcohol block

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent changes the chemical structure parameters of the polymer by introducing mercapto groups in the polyvinyl alcohol block and using polyanionic blocks with specific charge densities, which enhances both adhesion strength and the stability of the surface treatment effect over time

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20230295457A1Surface treatment liquid and surface treatment method

Publication Date: 2023.09.21 TOKYO OHKA KOGYO CO LTD

AI summary

A surface treatment liquid which adhesiveness of a component that achieves a surface treatment effect is good, and a desired surface treatment effect is easily obtained, and a surface treatment method using the surface treatment liquid are provided.A surface treatment liquid including a resin (A) and a solvent (S), in which the resin (A) includes a constituent unit (a1) derived form a compound having a hydrophilic group and an ethylenic double bond and a constituent unit (a2) derived from a compound a nitrogen-containing heterocyclic group, an ethylenic double bond, and a specific type of polar group is used.