Crosslinkable Polysiloxane Resin for Fast 3D Curing and Elasticity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing 3D printing technologies face challenges in producing polysiloxane-based articles with rapid curing rates and satisfactory physical properties, particularly elasticity, limiting their use in customised manufacturing.
Innovation Solution
A liquid polysiloxane comprising siloxane-thiourea segments and crosslinkable functional groups, such as ethylenically unsaturated groups, silyl hydride groups, or alkylenethiol groups, which enable rapid crosslinking and production of complex articles with fine detail and self-healing properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional polysiloxane moulding processes are used, then manufacturing precision is maintained, but adaptability for customised manufacturing is poor
Solution Approach 1:
The patent modifies the chemical composition parameters of polysiloxane by incorporating silane-functionalised cellulose acetate and reactive diluents, enabling the material to cure under UV irradiation. This parameter change transforms traditional moulding polysiloxane into a 3D-printable photopolymerizable resin, allowing customised manufacturing without retooling while maintaining manufacturing precision.
2Ease of manufacture
If conventional polysiloxanes are used for 3D printing, then ease of manufacture is improved, but productivity is poor due to slow curing rates
Solution Approach 1:
The patent introduces photoinitiators as intermediary substances that mediate the UV light-induced crosslinking reaction of polysiloxane. These photoinitiators absorb UV energy and transfer it to the polysiloxane resin, dramatically accelerating the curing rate and enabling rapid 3D printing while maintaining ease of manufacture through standard 3D printing processes.
Solution Approach 2:
The patent modifies the chemical structure of polysiloxane by adding silane-functionalised cellulose acetate and reactive diluents, creating a photopolymerizable resin system. This parameter change enables rapid UV-induced crosslinking, transforming slow-curing conventional polysiloxane into a fast-curing 3D printing material while maintaining ease of manufacture.
3Productivity
If rapid crosslinking is achieved during 3D printing, then productivity is improved, but physical properties such as elasticity deteriorate
Solution Approach 1:
The patent creates a composite resin system combining polysiloxane, silane-functionalised cellulose acetate, reactive diluents, and photoinitiators. This composite formulation enables rapid UV crosslinking while the specific composition ratios and molecular structures maintain elasticity and other physical properties, resolving the contradiction between curing speed and mechanical performance.
Solution Approach 2:
The patent optimizes the chemical composition parameters including silane content, reactive diluent ratios, and photoinitiator concentrations to achieve a balance between rapid crosslinking speed and maintained elasticity. The modified polysiloxane structure with controlled crosslink density enables fast curing without sacrificing physical properties.
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 polysiloxane achieves rapid crosslinking during 3D printing, producing articles with excellent physical properties, including elasticity and self-healing capabilities, suitable for customised manufacturing.
Implementation Method 1
a crosslinkable polysiloxane, to a resin composition comprising the crosslinkable polysiloxane, to a method of producing a three-dimensional silicone article using the crosslinkable polysiloxane, and to a three-dimensional silicone article comprising a crosslinked form of the crosslinkable polysiloxane
Implementation Method 2
Notably, rapid crosslinking can be achieved during 3D printing
Data Source
AI summary
The present invention provides a liquid polysiloxane comprising a siloxane-thiourea segment and a crosslinkable functional group(s) selected from one or more ethylenically unsaturated groups, silyl hydride groups, alkylenethiol groups and combinations thereof.