Production method of polyoxymethylene copolymer
A technology of oxidized methylene copolymer and production method, which is applied in the field of polyoxymethylene resin production technology, can solve problems such as in-depth research on multi-stage reactions, and achieve the effect of avoiding solvent recovery and improving performance
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0028] Embodiment 1 production method of the present invention
[0029] First, the liquid paraformaldehyde and dioxolane are mixed according to the volume ratio of 100:3; the mixed monomer then enters the first-stage reactor at 100 ° C and is forwarded to the single-screw extruder. Under these conditions, the polymerization reaction is carried out at a temperature of 70°C, the polymerization time is 100min, and the reaction pressure is 1MPa; Continue to add liquid paraformaldehyde monomer and dioxolane (volume ratio of 100:3), the reaction temperature is 60°C, the reaction pressure is 1MPa, and the reaction time is 30min; when a certain conversion rate (over 65%) is reached, transport The device sends the reaction product to the three-stage reactor and forwardly conveys the single-screw extruder. In the three-stage reactor, add the composite treatment agent polyethylene glycol and methylal (the input material is 100 parts by weight, and the total consumption of the composite t...
Embodiment 2
[0030] Embodiment 2 production method of the present invention
[0031]First, the liquid paraformaldehyde and dioxane are mixed according to the volume ratio of 100:10; the mixed monomer then enters the first-stage reactor at 70°C and forwards the co-rotating twin-screw extruder. In the presence of a catalyst, the polymerization reaction is carried out at a temperature of 60 ° C, the polymerization time is 10 minutes, and the reaction pressure is 0.5 MPa; after the first-order reaction, it is sent to the second-stage reactor by the conveyor and forwarded to the co-rotating twin-screw extruder , and continue to add liquid paraformaldehyde monomer and dioxane (100:10 volume ratio) in the reactor, the reaction temperature is 100°C, the reaction pressure is 0.2MPa, and the reaction time is 5min; rate (more than 65%), the conveyor sends the reaction product to the third-stage reactor and forwards the co-rotating twin-screw extruder. In the third-stage reactor, add the compounding a...
Embodiment 3
[0032] Embodiment 3 production method of the present invention
[0033] First, the liquid paraformaldehyde and ethylene oxide are mixed according to the volume ratio of 100:6; the mixed monomer then enters the first-stage reactor at 70°C and forwards the co-rotating four-screw extruder. In the presence of a catalyst, the polymerization reaction is carried out at a temperature of 50 ° C, the polymerization time is 5 minutes, and the reaction pressure is 0.1 MPa; after the first-order reaction, it is sent to the second-stage reactor by the conveyor and forwarded to the co-rotating four-screw extruder , and continue to add liquid paraldehyde monomer and ethylene oxide (volume ratio of 100:6) into the reactor, the reaction temperature is 40°C, the reaction pressure is 0.3MPa, and the reaction time is 8min; rate (more than 65%), the conveyor sends the reaction product to the third-stage reactor and forwards the single-screw extruder. In the third-stage reactor, add the compounding ...
PUM
| Property | Measurement | Unit |
|---|---|---|
| density | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More