Laminate Resin Layer with Siloxane-Bonded Inorganic Particles
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing protective films for transparent plastic materials, used in applications like automobiles and building exteriors, face challenges with abrasion resistance, yellowing due to UV light, and inadequate adhesion, which affects their durability and weather resistance.
Innovation Solution
A layered body comprising a resin layer with a fine inorganic particle composite, where the composite resin includes a polysiloxane segment bonded to a vinyl-based polymer segment, and fine inorganic particles are bonded to the composite resin through a siloxane bond, enhancing adhesion and resistance properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cured coating layer formed of a specific active energy ray-curable primer composition is used, then initial adhesion and weather resistance are improved, but adhesion to the resin substrate remains insufficient when only silsesquioxane compound and photopolymerization initiator are used
Solution Approach 1:
The patent uses a composite resin composition containing both silsesquoxane compound (for weather resistance) and polysiloxane compound with specific structural units (for adhesion). This composite approach combines the strengths of different materials to achieve both improved weather resistance and sufficient adhesion to the resin substrate, resolving the contradiction between these two properties.
2Strength
If no silsesquoxane compound is contained, then adhesion to inorganic material layer is improved, but adhesion to the inorganic material layer is not at a sufficient level
Solution Approach 1:
The patent formulates a composite resin composition containing both silsesquoxane compound (which provides weather resistance and contributes to adhesion) and polysiloxane compound with specific structural units (which enhances adhesion to inorganic material layers). This composite formulation achieves sufficient adhesion to inorganic material layers while maintaining weather resistance.
3Weight of moving object
If transparent plastic materials are used as alternatives to glass, then weight is reduced and recyclability is improved, but abrasion resistance and resistance to yellowing deteriorate
Solution Approach 1:
The patent applies a composite resin composition containing silsesquoxane compound and polysiloxane compound with specific structural units as a coating layer on transparent plastic materials. This coating provides enhanced abrasion resistance and resistance to yellowing, allowing the plastic substrate to maintain its lightweight and recyclable properties while gaining the durability normally associated with glass.
Solution Approach 2:
The patent modifies the surface properties of transparent plastic materials by applying a coating with specific chemical composition and structure. The coating changes the surface parameters (hardness, chemical resistance, UV resistance) while maintaining the bulk properties (lightweight, recyclability) of the plastic substrate.
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 layered body exhibits improved abrasion resistance, long-term weather resistance, heat-resistant adhesion, and water-resistant adhesion, making it suitable for various protective applications including automotive and building materials.
Implementation Method 1
fine inorganic particles (m) that are each bonded to the composite resin (A) at the polysiloxane segment (a1) through a siloxane bond
Implementation Method 2
a compound resin (A) in which a polysiloxane segment (a1) having a structural unit represented by general formula (1) and/or general formula (2) and a silanol group and/or a hydrolyzable silyl group is bonded to a vinyl-based polymer segment (a2) through a bond represented by general formula (3), the bond being formed as a result of a dehydration condensation reaction
Data Source
AI summary
There is provided a layered body including a resin layer (I) and a second layer (II) that are stacked on one another. The resin layer (I) is formed of a resin composition containing a fine inorganic particle composite (M) that includes: a composite resin (A) in which a polysiloxane segment (a1) having a structural unit represented by general formula (1) and/or general formula (2) and further having a silanol group and/or a hydrolyzable silyl group is bonded to a vinyl-based polymer segment (a2) through a bond represented by general formula (4); and fine inorganic particles (m) that are each bonded to the composite resin (A) at the polysiloxane segment (a1) through a siloxane bond.