Active Energy Ray-Curable Coating Composition for Automotive Parts
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional active energy ray-curable coating compositions for automotive parts face challenges in achieving high impact resistance and weatherability due to the absorption of active energy rays by pigments, leading to reduced curability and durability of the coating film.
Innovation Solution
A specific active energy ray-curable coating composition comprising poly[(meth)acryloyloxyalkyl] isocyanurate, polyfunctional (meth)acrylate, acrylic resin, and at least one pigment, with optimized component ratios and molecular weights to enhance curability and physical properties, including the use of urethane (meth)acrylate and di(meth)acrylate with saturated hydrocarbon groups, to form a coating film with improved hiding subsurface property and smoothness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If pigments are added to active energy ray-curable coating compositions to improve appearance and hiding properties, then the coating film achieves better aesthetic properties, but the pigments absorb active energy rays and reduce curability and weatherability
Solution Approach 1:
The patent changes the chemical composition parameters of the coating system by introducing specific resin components (poly[(meth)acryloyloxyalkyl] isocyanurate, polyfunctional (meth)acrylate, and acrylic resin with controlled molecular weight and solubility parameter) that modify the energy absorption characteristics and curing behavior, allowing the coating to maintain both pigment-induced hiding properties and adequate curability despite pigment presence
Solution Approach 2:
The patent creates a composite coating system combining multiple resin components with specific functions: poly[(meth)acryloyloxyalkyl] isocyanurate provides crosslinking and durability, polyfunctional (meth)acrylate provides crosslinking density for weatherability, and acrylic resin provides flexibility and adhesion. This composite resin system works synergistically with pigments to achieve both aesthetic and durability requirements
2Productivity
If conventional active energy ray-curable coating compositions are used to achieve fast curing and high production efficiency, then the coating film forms quickly, but the composition lacks sufficient impact resistance and weatherability
Solution Approach 1:
The patent optimizes the molecular weight parameter of the acrylic resin (5,000-30,000) and its solubility parameter (9.0-11.5) to control the balance between curing speed and final film properties. This parameter optimization enables the coating to cure quickly while achieving adequate impact resistance and weatherability
Solution Approach 2:
The patent employs a composite resin system where poly[(meth)acryloyloxyalkyl] isocyanurate provides crosslinking for durability, polyfunctional (meth)acrylate provides high crosslinking density for weatherability, and acrylic resin provides flexibility and adhesion. This composite approach maintains fast curing while improving overall film performance
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 composition achieves superior active energy ray curability, impact resistance, and weatherability, ensuring a durable and aesthetically pleasing coating film suitable for automotive applications.
Implementation Method 1
an active energy ray-curable coating composition comprising a poly[(meth)acryloyloxyalkyl] isocyanurate (A), a polyfunctional (meth)acrylate (B) having 4 or more (meth)acrylate groups, an acrylic resin (C)... the active energy ray-curable coating composition includes the component (A) in an amount of 40 to 80 parts by mass, the component (B) in an amount of 10 to 40 parts by mass, and the component (C) in an amount of 10 to 40 parts by mass per 100 parts by mass of the total amount of the components (A), (B) and (C)
Data Source
AI summary
An object of the present invention is to provide an active energy ray-curable coating composition including a specific resin component and at least one pigment (D) selected from the group consisting of a coloring pigment and a glitter pigment. The present invention provides an active energy ray-curable coating composition including a poly[(meth)acryloyloxyalkyl] isocyanurate (A); a polyfunctional (meth)acrylate (B) having 4 or more (meth)acrylate groups; an acrylic resin (C); and at least one pigment (D) selected from the group consisting of a coloring pigment and a glitter pigment, wherein the acrylic resin (C) has a weight-average molecular weight in the range of 5,000 to 30,000 and a solubility parameter in the range of 9.0 to 11.5.