Preparation method of nano calcium carbonate for polyurethane adhesive
A technology of nano-calcium carbonate and polyurethane glue, which is applied in the direction of calcium carbonate/strontium/barium, polyurea/polyurethane adhesive, nanotechnology for materials and surface science, etc., which can solve the difficulty in meeting the requirements of different working conditions , can not be modified by wet method of nano-calcium carbonate, and the modification effect of nano-calcium carbonate is not obvious, so as to achieve the effect of good dispersion, small particle size and excellent mechanical properties
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0011] Using the mixture of sodium tripolyphosphate, sodium dimer acid, zinc sulfate and sucrose as crystal form control agent, rosin amine, tin stearate and titanate as modifier, it is prepared by carbonization, surface modification and depolymerization Polyurethane glue uses nano-calcium carbonate, the specific process is: the refined Ca(OH) 2 The slurry was aged for 24 hours, and the slag was removed through vibrating screens and hydrocyclones. After adjusting the mass concentration to 12% and the temperature to 25°C, add Ca(OH) 2 1.5% of the mass of the crystal form control agent, stirred and mixed evenly, and then introduced CO with a volume concentration of 30% 2 The gas is bubbled and carbonized until the pH of the slurry is 7, and the carbonization end point is obtained to obtain cooked pulp with a mass concentration of 12%. After removing the slag from the cooked pulp, heat up while stirring, and add Ca(OH) after the temperature reaches 85°C 2 6% of the mass modifier...
Embodiment 2
[0013] Using the mixture of sodium tripolyphosphate, sodium dimer acid, zinc sulfate and sucrose as crystal form control agent, rosin amine, tin stearate and titanate as modifier, it is prepared by carbonization, surface modification and depolymerization Polyurethane glue uses nano-calcium carbonate, the specific process is: the refined Ca(OH) 2 The slurry was aged for 20 hours, and the slag was removed by vibrating screen and hydrocyclone at 6 stages. After adjusting the mass concentration to 15% and the temperature to 25°C, add Ca(OH) 2 1.2% of the mass of the crystal form control agent, stirred and mixed evenly, and then passed into CO with a volume concentration of 40% 2 The gas is bubbled and carbonized until the pH of the slurry is 7 and the carbonization end point is obtained to obtain cooked pulp with a mass concentration of 15%. After removing the slag from the cooked pulp, heat up while stirring, and add Ca(OH) after the temperature reaches 80°C 2 5% modifier by mas...
Embodiment 3
[0015] Polyurethane sealant formula: 50 parts of polyoxypropylene glycol, 50 parts of polyoxypropylene triol, 25 parts of toluene isocyanate, 30 parts of dioctyl phthalate, 1 part of stannous octoate, 50 parts of nanometer calcium carbonate in Example 1 2 parts, chain extender (ADR-4400) 2 parts. The polyurethane sealant was subjected to a lap shear strength test. The surface drying time was 35 minutes and the curing speed was 3.5mm / 24h. After testing, the tensile strength was 23.12MPa, the elongation at break was 687%, and the tear strength was 53N / mm.
PUM
| Property | Measurement | Unit |
|---|---|---|
| specific surface area | aaaaa | aaaaa |
| particle diameter | aaaaa | aaaaa |
| specific surface area | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More