Graft Copolymer Composition for Rapid Curing Automotive Coatings
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Solution Overview
Problem
Current coating technologies for automotive refinishing lack rapid curing and high cross-linked density, which affects the film build and leveling of the coating film.
Innovation Solution
The development of graft copolymer compositions with a polymeric backbone derived from polymerizable ethylenically unsaturated monomers and polymeric arms, including condensation and random copolymer arms, which provide rapid curing and high cross-linked density through specific attachment points and monomer combinations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional coating technologies are used, then the coating can be applied, but rapid curing and high cross-linked density are not achieved, resulting in poor film build and leveling
Solution Approach 1:
The invention uses graft copolymer compositions that combine polymeric backbone derived from polymerizable ethylenically unsaturated monomers with polymeric arms including condensation and random copolymer arms. This composite structure achieves both rapid curing through the backbone and high cross-linked density through the multiple arm types, resolving the contradiction between curing performance and film quality.
Solution Approach 2:
The copolymer is segmented into distinct functional components: a polymeric backbone providing rapid curing capability and multiple polymeric arms (condensation and random copolymer arms) providing cross-linked density. Each segment performs its specific function, allowing the coating to achieve both fast curing and high film build quality simultaneously.
2Productivity
If fast-drying coating is achieved, then curing speed is improved, but cross-linked density and film build may be compromised
Solution Approach 1:
The graft copolymer segments curing function into the polymeric backbone (rapid curing) and cross-linking function into the polymeric arms (high cross-linked density). This segmentation allows fast-drying performance to be achieved without compromising cross-linked density, as both functions operate independently and synergistically.
Solution Approach 2:
The composite graft copolymer structure combines different polymer types (backbone from ethylenically unsaturated monomers, arms from condensation and random copolymers) to simultaneously deliver rapid curing speed and high cross-linked density, resolving the trade-off between productivity and reliability.
3Reliability
If complex polymeric structure with multiple arms is used, then cross-linked density is improved, but manufacturing complexity increases
Solution Approach 1:
The complex polymeric structure is segmented into modular components: a standardized backbone and interchangeable arm types (condensation and random copolymer arms). This modular segmentation simplifies manufacturing by allowing independent synthesis and controlled attachment of each segment, reducing overall complexity while maintaining high cross-linked density.
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 graft copolymer compositions enable rapid curing, high cross-linked density, and improved film build and leveling, making them suitable for fast-drying coatings in automotive refinishing applications.
Implementation Method 1
a polymeric backbone derived from a plurality of polymerizable ethylenically unsaturated monomers; and a plurality of polymeric arms each attached pendant to the polymeric backbone. In one such embodiment, each polymeric arm is attached pendant onto the polymeric backbone via an end group having a single terminal ethylenically unsaturated group
Data Source
AI summary
A graft copolymer composition including: a polymeric backbone derived from a plurality polymerizable ethylenically unsaturated monomers; and a plurality of polymeric arms attached pendant to the polymeric backbone. The polymeric arms include: (a) at least two different polymeric arms comprising: a condensation copolymer arm and a random copolymer arm, (b) a polymeric arm having segments of (i) a condensation copolymer segment and (ii) a random copolymer segment, wherein said condensation copolymer segment and random copolymer segment are linked to each other; (c) or combinations thereof.