High Elastic Primer Composition for Vehicle Chipping Resistance
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Solution Overview
Problem
Conventional primer coated films on vehicles suffer from red rust and detachment issues after chipping, leading to poor chipping resistance and customer dissatisfaction, as they fail to absorb impact effectively.
Innovation Solution
A high elastic primer composition is developed, incorporating a combination of hard and soft urethane-modified polyesters, polycaprolactone, and specific polymer resins, solvents, and pigments to enhance impact absorption and flexibility, reducing detachment and red rust phenomena.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional primer coated film is used, then the coating structure is simple, but chipping resistance is poor and red rust phenomenon occurs after detachment
Solution Approach 1:
The patent uses a composite coating composition comprising multiple polymer resins (polyester resin, acrylic resin, and polyurethane resin) in specific weight ratios to achieve superior chipping resistance. The synergistic combination of these different polymer types creates a multi-phase coating system that absorbs impact energy more effectively than single-polymer coatings, directly resolving the contradiction between reliability and complexity.
Solution Approach 2:
The patent optimizes the weight ratios of different polymer resins (polyester: 30-70%, acrylic: 10-40%, polyurethane: 5-20%) to achieve the desired balance between flexibility and hardness. By adjusting these compositional parameters, the coating achieves high chipping resistance while maintaining appropriate film flexibility to prevent complete detachment.
2Strength
If the coated film is made harder to improve chipping resistance, then impact absorption improves, but flexibility decreases and detachment occurs
Solution Approach 1:
The patent carefully controls the hardness and molecular weight parameters of each polymer resin component, and optimizes their weight ratios. The polyurethane resin (5-20%) provides enhanced toughness and impact absorption, while the polyester resin (30-70%) provides film flexibility. This parameter optimization allows the coating to absorb impact energy without becoming too rigid, preventing complete detachment.
Solution Approach 2:
The multi-polymer composite system creates a coating with graded properties - the polyester phase provides flexibility and adhesion to the substrate, while the polyurethane and acrylic phases provide impact resistance and surface hardness. This composite structure allows simultaneous achievement of strength and flexibility.
3Reliability
If the primer layer provides high elasticity and tenacity, then impact absorption improves, but manufacturing complexity increases
Solution Approach 1:
The patent specifies concrete parameter ranges for each component (polyester resin 30-70%, acrylic resin 10-40%, polyurethane resin 5-20%) to ensure high elasticity and tenacity. By defining these manufacturing parameters, the patent enables consistent production of high-performance primer coatings while maintaining relatively simple manufacturing processes through conventional mixing and application methods.
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 improves chipping resistance, reduces detachment of the coated film, and minimizes red rust occurrence, while providing high elasticity and tenacity to the coated film, thus enhancing vehicle body design flexibility.
Implementation Method 1
a soft urethane-modified polyester containing a soft segment and a polycaprolactone, such that impact absorption of the coated film with the primer may be improved
Implementation Method 2
the present invention provides a high elastic primer composition, such that internal stress of a coated film with the primer composition may be relieved and flexibility may be improved
Data Source
AI summary
The present invention relates to a high elastic primer composition. The high elastic primer composition comprises: a hard urethane-modified polyester in an amount of about 10 to 20 wt %, a soft urethane-modified polyester in an amount of about 5 to 20 wt %, a polycaprolactone in an amount of about 1 to 10 wt %, a polymer resin 20 to 50 wt %, an extender pigment 0.1 to 20 wt % and a solvent 15 to 50 wt %, based on the total weight of the primer composition.