One-Component Paint Composition with Carbamate Resins for Scratch Resistance
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Solution Overview
Problem
Conventional one-component type clear paints using a melamine curing agent exhibit inferior elasticity, flexibility, and scratch resistance, limiting their physical properties and scratch restoring capabilities.
Innovation Solution
A one-component paint composition comprising 30 to 60 wt% carbamate group-containing acrylic polyol resin, 10 to 25 wt% hyperbranched structure carbamate group-containing polyester polyol resin, and 5 to 25 wt% hydroxyl group-containing long-chain acrylic polyol resin, along with a melamine curing agent and curing catalyst, to achieve superior scratch resistance and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a melamine curing agent is used in a one-component type clear paint, then the coating provides good hardness and clarity, but the coated film exhibits inferior elasticity, flexibility, and scratch resistance
Solution Approach 1:
The patent uses a composite resin system combining carbamate group-containing acrylic polyol resin (30-60 wt%) and hydroxyl group-containing long-chain acrylic polyol resin (5-25 wt%) with melamine curing agent. This composite material approach allows the coating to simultaneously achieve hardness from the melamine crosslinking and scratch resistance plus flexibility from the carbamate groups and long-chain polyol structure, resolving the contradiction between hardness and scratch resistance.
Solution Approach 2:
The patent modifies the chemical structure parameters of the resin by introducing carbamate functional groups and using long-chain acrylic polyol with specific molecular weight ranges. These parameter changes in the resin composition enable the coating to maintain hardness while improving elasticity, flexibility, and scratch resistance, thus resolving the performance limitations of conventional melamine-based coatings.
2Ease of manufacture
If conventional one-component type paint composition is used, then the formulation is simple and easy to manufacture, but the coated film shows poor acid resistance and inferior scratch restoring properties
Solution Approach 1:
The patent changes the chemical composition parameters by incorporating carbamate group-containing acrylic polyol resin and long-chain acrylic polyol resin in specific proportions. These parameter modifications enhance acid resistance and scratch restoring properties while maintaining the one-component type formulation simplicity and ease of manufacture, as no separate catalyst or additional components are needed.
3Reliability
If the resin composition is optimized for scratch resistance, then flexibility and elasticity improve, but achieving balanced hardness and other physical properties becomes difficult
Solution Approach 1:
The patent optimizes the weight ratio parameters of different resin components: carbamate group-containing acrylic polyol resin (30-60 wt%), hydroxyl group-containing long-chain acrylic polyol resin (5-25 wt%), and melamine curing agent (5-25 wt%). This parameter optimization achieves a balance where the carbamate groups provide flexibility and scratch resistance, while the melamine crosslinking maintains hardness, resolving the contradiction between flexibility and hardness.
Solution Approach 2:
The patent creates a composite resin system that combines multiple resin types with complementary properties. The carbamate group-containing acrylic polyol contributes flexibility and scratch resistance, while the melamine curing agent provides hardness through crosslinking. This composite material approach allows simultaneous achievement of flexibility and hardness that neither component could achieve alone.
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 demonstrates enhanced acid resistance, scratch resistance, and scratch restoring performance while maintaining excellent elasticity and flexibility, outperforming conventional one-component type paints in physical properties such as hardness, adhesiveness, water resistance, and acid resistance.
Implementation Method 1
a curing coating system of a resin including a hydroxyl functional group and aminoplast
Implementation Method 2
a carbamate curing structure having a crosslinking structure formed by a reaction between a hydroxyl functional group and an isocyanate group
Implementation Method 3
secures excellent elasticity, flexibility and scratch resistance
Implementation Method 4
a curing coating system of a resin including a hydroxyl functional group and aminoplast
Data Source
AI summary
The present invention relates to a one-component type paint composition with superior scratch resistance, which has excellent acid resistance and scratch resistance and secures excellent scratch restoring performance by including a carbamate group-containing acrylic polyol resin, a hyperbranched structure carbamate group-containing polyester polyol resin, a curing agent and a curing catalyst. Particularly, excellent elasticity, flexibility and scratch resistance may be secured even when applied as a one-component type paint to form a coated film and then cured.