UV-Curable Organopolysiloxane Composition for High Dimensional Accuracy
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Solution Overview
Problem
Conventional UV-curable silicone resins face challenges in achieving high dimensional accuracy and stability due to oxygen inhibition and thermal expansion issues, limiting their effectiveness in nanoimprinting, curved surface printing, and 3D printing applications.
Innovation Solution
A UV-curable organopolysiloxane composition comprising a linear alkenyl group-containing organopolysiloxane, an organohydrogenpolysiloxane, and a photoactive platinum complex catalyst, which undergoes rapid curing under UV exposure, minimizing thermal expansion and ensuring high dimensional accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional UV-curable silicone resins are used, then curing can be achieved, but oxygen inhibition causes unstable crosslinking and poor dimensional accuracy
Solution Approach 1:
The patent changes the chemical composition parameters of the silicone resin by incorporating specific compounds (silicone-modified polyether, silicone-modified polyester, or silicone-modified polyurethane) in controlled amounts (0.1-10 parts by weight per 100 parts of base silicone resin). This parameter change modifies the resin's chemical structure to reduce oxygen permeability and inhibition, enabling stable UV curing and high dimensional accuracy without sacrificing cure reliability.
2Manufacturing precision
If heat-curing is used for silicone rubber compositions, then curing can be achieved, but thermal expansion and shrinkage occur, reducing pattern transfer accuracy
Solution Approach 1:
The patent replaces the thermal curing mechanism with a UV-light-based curing mechanism. By using UV irradiation to activate the curing reaction instead of heat, the process eliminates thermal expansion and shrinkage that occur during heat-curing. This substitution enables high-precision pattern transfer while avoiding the temperature-induced dimensional changes that would compromise accuracy.
3Ease of operation
If addition-curable liquid silicone rubber is used, then good flow properties and pattern inversion ability are achieved, but reliance on matrix material and dimensional accuracy limits scalability
Solution Approach 1:
The patent modifies the composition parameters of the silicone rubber by adding specific compounds (silicone-modified polyether, silicone-modified polyester, or silicone-modified polyurethane) in controlled amounts. This changes the material's properties to improve both flow characteristics and dimensional reproducibility simultaneously, resolving the contradiction between ease of operation and manufacturing precision.
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 achieves high strength and dimensional accuracy, suppressing heat-induced expansion and shrinkage, enabling precise pattern transfer and printing in nanoimprinting, curved surface printing, and 3D printing applications.
Implementation Method 1
A UV-curable organopolysiloxane composition comprising a linear alkenyl group-containing organopolysiloxane, an organohydrogenpolysiloxane, and a photoactive platinum complex catalyst, which undergoes rapid curing under UV exposure
Data Source
AI summary
The present invention pertains to an ultraviolet-ray-curable organopolysiloxane composition containing: (A) (A-1) a straight-chain organopolysiloxane containing an alkenyl group, and (A-2) a three-dimensional-network-shaped organopolysiloxane resin containing an R12R2SiO1/2 unit, an R13SiO1/2 unit, an SiO2 unit, and an alkenyl group; (B) an organohydrogenpolysiloxane; (C) a photoactive platinum complex curing catalyst; and (D) an organopolysiloxane oligomer containing an R12R2SiO1/2 unit or the R12R2SiO1/2 unit and an R13R2SiO1/2 unit, also containing an R1SiO3/2 unit, not containing an SiO2 unit, and also containing an alkenyl group. As a result, this ultraviolet-ray-curable organopolysiloxane composition retains high strength and does extremely well suppressing heat-induced expansion or contraction; hence, it is possible to transfer a pattern and print with high dimensional accuracy.