Curable Composition Film Hardness Antistatic Properties
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Solution Overview
Problem
Curable compositions used in industrial applications face a challenge in achieving both excellent film hardness and antistatic properties simultaneously, as increasing the content of quaternary cationic (meth)acrylamide-based monomers compromises film hardness, while increasing polyfunctional (meth)acrylate compounds compromises antistatic properties.
Innovation Solution
Incorporating an acrylamide-based polyfunctional compound with a specific structure and an ionic polymer having a specific repeating unit into the curable composition, with a mass ratio of polyfunctional compound to ionic polymer ranging from 90/10 to 99.8/0.2, to enhance compatibility and uniformity, thereby achieving both film hardness and antistatic properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the content of quaternary cationic (meth)acrylamide-based monomer is increased to improve antistatic properties, then antistatic properties are improved, but film hardness is noticeably lowered
Solution Approach 1:
The patent changes the chemical structure parameters of the monomer from conventional quaternary cationic (meth)acrylamide-based monomers to specific compounds with defined molecular weights (5,000-800,000) and structural characteristics (General Formula (III) with specific R1-R6 groups). This structural parameter change allows achieving antistatic properties without the severe hardness reduction caused by conventional monomers.
Solution Approach 2:
The patent creates a composite curable composition system combining the specific ionic polymer (from General Formula (III)) with polyfunctional (meth)acrylate compounds. This composite approach allows the ionic polymer to provide antistatic properties while the polyfunctional (meth)acrylate maintains film hardness, resolving the contradiction between these two properties.
2Strength
If the content of polyfunctional (meth)acrylate compound is increased to improve film hardness, then film hardness is improved, but antistatic properties are noticeably lowered
Solution Approach 1:
The patent adjusts the content ratio parameters within specific ranges: polyfunctional (meth)acrylate compound at 96.0-50.0 mass% and ionic polymer at 4.0-0.2 mass%. This precise parameter control ensures that film hardness is maintained through the polyfunctional (meth)acrylate while sufficient antistatic properties are preserved through the ionic polymer component.
3Reliability
If conventional curable composition is used, then basic film formation is achieved, but both film hardness and antistatic properties cannot be satisfied at the same time
Solution Approach 1:
The patent fundamentally changes the composition parameters by introducing ionic polymers with specific structural formulas (General Formula (III)) and controlling their content at 0.2-4.0 mass%. This parameter change enables simultaneous satisfaction of both film hardness (through polyfunctional (meth)acrylate) and antistatic properties (through ionic polymer), which conventional compositions cannot achieve.
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 proposed solution results in a cured film with excellent antistatic properties and film hardness, improving compatibility and uniformity, which was not achievable with previous compositions.
Implementation Method 1
curable composition which comprises: at least one polyfunctional compound selected from the group consisting of a compound represented by General Formula (I) and a compound represented by General Formula (II); and an ionic polymer including a repeating unit represented by General Formula (IV)
Implementation Method 2
an ionic polymer including a repeating unit represented by General Formula (IV)
Data Source
AI summary
A curable composition contains at least one polyfunctional compound selected from the group consisting of a compound represented by General Formula (I) and a compound represented by General Formula (II), and an ionic polymer including a repeating unit indicated by General Formula (IV).