Polymerizable Composition for Solvent-Resistant Printing Plates
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Solution Overview
Problem
Conventional development solutions for negative thermal sensitive imaging paste in CTP printing are costly and environmentally unfriendly, requiring strong alkaline or solvent-based development processes, and lack efficient methods for producing durable printing plates with high resolution and solvent resistance.
Innovation Solution
A polymerizable composition comprising an infrared absorber, polymerization initiator, polymerizable compound, and a particulate random copolymer binder derived from polyalkylene oxide-based and nitrogen-free non-polyalkylene oxide-based monomers, which allows for image development using a fountain solution, enhancing film formability, adhesion, and resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If strong alkaline or solvent-based development solutions are used for negative thermal sensitive imaging paste, then the development process can be performed, but the disposal cost increases and environmental friendliness deteriorates
Solution Approach 1:
The patent changes the chemical parameters of the development system by formulating a polymerizable composition with specific components (polymer binder, polymerizable compound, infrared absorber, polymerization initiator) that enables development with fountain solution instead of strong alkaline or solvent-based development solutions, reducing environmental impact and disposal costs
Solution Approach 2:
The patent replaces expensive and environmentally harmful strong alkaline or solvent-based development solutions with a cheaper and more environmentally friendly fountain solution, which is routinely used in printing operations anyway, thus reducing disposal costs and environmental impact
2Ease of manufacture
If conventional polymer binders are used in negative thermal sensitive imaging paste, then the paste can be formulated, but the adhesion, solvent resistance, and resolution of the produced printing plates are insufficient
Solution Approach 1:
The patent uses a composite polymer binder system comprising a polymer binder and a polymerizable compound that work together to provide improved adhesion, solvent resistance, and resolution. The polymer binder provides base film formation while the polymerizable compound enhances crosslinking and durability when exposed to infrared radiation and developed with fountain solution
Solution Approach 2:
The patent modifies the chemical composition parameters of the polymer binder by selecting specific types (polyvinyl alcohol, polyacrylic acid, polyacrylamide, or carboxymethyl cellulose) and combining them with polymerizable compounds in specific ratios, which fundamentally changes the performance characteristics of the imaging paste to achieve superior adhesion, solvent resistance, and resolution
3Object-affected harmful factors
If the imaging paste is designed for fountain solution development, then environmental impact is reduced, but achieving high resolution and solvent resistance becomes more difficult
Solution Approach 1:
The patent introduces a polymerizable compound as an intermediary that bridges the gap between fountain solution development and high performance requirements. This compound crosslinks upon infrared exposure to form a durable, high-resolution image structure that resists solvent attack while being compatible with fountain solution development
Solution Approach 2:
The patent creates a composite imaging system where the polymer binder provides film formation and the polymerizable compound provides crosslinking and durability enhancement, enabling fountain solution development to achieve both environmental benefits and high printing plate quality with excellent resolution and solvent resistance
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 polymerizable composition enables the production of durable printing plates with improved solvent resistance, adhesion, and high resolution, reducing printing costs and environmental impact by allowing direct development with a fountain solution, thus enhancing print run efficiency.
Implementation Method 1
an infrared absorber
Implementation Method 2
a polymerization initiator; a polymerizable compound
Data Source
AI summary
A polymerizable composition is provided, including an infrared absorber, a polymerization initiator, a polymerizable compound, and a polymer binder, wherein the polymer binder is a particulate random copolymer, and the polymer binder has structural units derived from a polymerizable polyalkylene oxide-based monomer and a polymerizable nitrogen-free non-polyalkylene oxide-based monomer. The polymerizable composition may be used in the production of imageable elements or printing plates.