Acrylic Paint-Protective Coating for Removable, Non-Marking Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing paint-protective coatings face challenges in efficiently protecting non-flat objects with complex shapes, as they either suffer from improper application leading to peeling or lack sufficient removability and non-marking properties when applied as liquid compositions.
Innovation Solution
A paint-protective coating material formed from a liquid coating composition, comprising a polymerization product of acrylic monomers, with specific storage moduli and glass transition temperatures, ensuring good removability and non-marking properties across a broad temperature range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a paint-protective sheet is applied to protect paint layers, then protection is provided, but improper application leads to wrinkles and peeling
Solution Approach 1:
The patent uses a liquid coating composition that is applied and dried to form a protective coating, eliminating the need for mechanical sheet application. This liquid application method avoids wrinkles and peeling issues associated with sheet-based protection, especially on complex three-dimensional shapes.
Solution Approach 2:
The patent specifies precise storage modulus parameters at different temperatures (G′(70) = 0.40-1.30 MPa, G′(23) = 250-800 MPa, G′(−30) ≤ 2300 MPa) to ensure the coating material has appropriate flexibility and adhesion across varying temperatures, preventing peeling while maintaining protection.
2Ease of operation
If a liquid protective coating composition is applied directly to the paint layer, then the protective coat is free of substrate and can be removed, but it lacks sufficient removability and causes marking
Solution Approach 1:
The patent carefully controls the storage modulus parameters to create a coating that is soft enough to remove without marking (G′(70) ≤ 1.30 MPa) but maintains sufficient structural integrity during application and protection (G′(23) ≥ 250 MPa). This parameter optimization resolves the contradiction between removability and non-marking properties.
Solution Approach 2:
The coating uses a copolymer composed of multiple monomer units (acrylic monomer, carboxylic acid monomer, hydroxyl group-containing monomer, and amine group-containing monomer) to achieve balanced properties: adhesion to paint layer, flexibility for removal, and protection functionality, eliminating the need for substrate support.
3Ease of operation
If the protective coating is made softer to improve removability, then removal becomes easier, but protection effectiveness decreases
Solution Approach 1:
The patent specifies storage modulus at different temperatures to achieve temperature-dependent behavior: the coating is softer at high temperatures (G′(70) ≤ 1.30 MPa) for easy removal, but maintains sufficient strength at room temperature (G′(23) ≥ 250 MPa) for effective protection, resolving the contradiction between removability and protection strength.
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 coating material provides balanced removability and non-marking properties, effectively protecting paint layers on complex-shaped objects without leaving traces, even at varying temperatures.
Implementation Method 1
The paint-protective coating material has a storage modulus at 70° C. of 0.40 MPa or higher and 1.30 MPa or lower, has a storage modulus at 23° C. of 250 MPa or higher and 800 MPa or lower, and preferably has a storage modulus at −30° C. of 2300 MPa or less
Data Source
AI summary
Provided is a paint-protective coating material formed from a liquid coating composition. The coating composition comprises, as its base polymer, a polymer (A) that is a polymerization product of monomers comprising an acrylic monomer. The paint-protective coating material has a storage modulus at 70° C. of 0.40 MPa or higher and 1.30 or lower, a storage modulus at 23° C. of 250 MPa or higher and 800 MPa or lower, and a storage modulus at −30° C. of 2300 MPa or less.