Ceramic photoresin formulation
A technology of photoresin and preparation, which is applied in the direction of ceramic forming machines, casting molds, metal processing equipment, etc., and can solve the problems of fragile ceramic products, strong deep light penetration, yellowing, etc.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
example 1A
[0089] Example 1A: General procedure for preparing ceramic photoresin compositions. To produce the resin composition, monomers and oligomers are introduced into a mixing vessel. Dispersants, rheology modifiers and / or UV absorbing compounds, if present, are also added to the mixing vessel. Place the mixture in the oven and heat to 30°C to 35°C with slow stirring. Next, a free radical photoinitiator is added to the composition, followed by gradual addition of individual proportions of ceramic powder (e.g., preferably, 10-15% of the total ceramic powder is added per individual proportion to provide a homogeneous blend) . After adding the first portion of the ceramic powder, the mixture is allowed to mix well until the mixer torque is reduced and equilibrium is reached (approximately 10 minutes or more). Add each portion of the ceramic powder in the same stepwise fashion until all the ceramic powder has been added. The formulation was then mixed for 1 to 2 hours while monitori...
example 1B
[0090] Example 1B: General Procedure for Determining the Cure Depth of a Ceramic Photoresin Composition. Using a 3D printer Prodways L5000, measure the thickness of the cured 3D printed object (C d ), and calculate the curing depth (D p ). D. p Values can vary based on UV irradiation wavelength, exposure time, and the amount of UV absorber present in the ceramic photoresin composition. D. p Larger values are generally due to a combination of deep light penetration, absorption by photoinitiators, absorption by UV absorbing additives, and / or scattering of light on the ceramic particles. Unless otherwise stated, E is measured under 365 nm illumination c and D p values and were independently verified using a 365nm light source.
[0091]
[0092] in:
[0093] C d is the measured curing depth (mm)
[0094] D. p is the calculated penetration depth (mm)
[0095] E is the controlled irradiation intensity (mJ / cm 2 or mW / cm 2 )
[0096] E. c is the calculated cri...
example 1C
[0097] Example 1C: General procedure for determining rheology and viscosity. Unless otherwise stated, rheological measurements were performed with a TA Instruments DHR-2 rheometer set at 25°C using a 50 mm stainless steel parallel plate upper geometry and a Peltier plate lower geometry. Unless otherwise stated, the viscosity was measured as a function of shear rate, where the shear rate was swept from 100 1 / s to 0.01 1 / s in 10 minutes. Each sample was measured in duplicate following a mixing protocol that ensured reproducible results. Typically, there is less than 10 minutes between each measurement, as longer time periods between measurements can lead to inconsistent measurements, shifting towards increased viscosity.
PUM
| Property | Measurement | Unit |
|---|---|---|
| Diameter | aaaaa | aaaaa |
| Diameter | aaaaa | aaaaa |
| Diameter | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More