Method for aqueous-phase synthesis of polyamide-imide resin
A technology of imide resin and polyamide, which is applied in the field of polymer material synthesis, can solve the problems of difficult removal of high-boiling point organic solvents, large environmental pollution, and high reaction cost, so as to reduce labor costs and time costs, and be environmentally friendly , low-cost effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0030] The method for synthesizing polyamide-imide resin in aqueous phase comprises the steps:
[0031]
[0032] (1) Weigh the raw material monomer teremellitic acid (210g) and diphenyl ether diamine (220g) required for the reaction, and carry out particle size refinement treatment to particle size≤20μm respectively; particle size refinement treatment is to adopt air flow The pulverizer is used for micronization in a solid state, and the condition is to pass in compressed nitrogen and treat it at room temperature for 20 minutes; the reduction in the size of the raw material monomer is the result of high-speed collisions between its own particles under the action of high-speed airflow;
[0033](2) take by weighing the amount of water required in the reaction process according to the monomer total mass after weighing, according to the monomer total mass: the ratio of water quality=1:10 takes by weighing the amount of water (4300g);
[0034] Put the teremellitic acid and diphe...
Embodiment 2
[0043] The method for synthesizing polyamide-imide resin in aqueous phase comprises the steps:
[0044] The polyamide-imide resin structure of the present embodiment is as shown in formula II:
[0045]
[0046] (1) Weigh the raw material monomers teremellitic acid (210g) and p-phenylenediamine (120g) required for the reaction, and carry out particle size refinement treatment to a particle size≤10 μm; the particle size refinement treatment is pulverized by jet mill Machine feeds compressed nitrogen gas and processes at normal temperature for 20min to carry out the micronization under the solid state, then takes the amount of water required in the reaction process (see step 2) and mixes with micronized teremellitic acid and p-phenylenediamine , placed in an emulsifier for emulsification to obtain an emulsified mixture;
[0047] (2) take the amount of water needed in the reaction process according to the monomer total mass after weighing, according to the monomer total mass: ...
Embodiment 3
[0057] The preparation process of the polyamide-imide resin of this embodiment is the same as that of Example 1, except that the diamine compound is m-phenylenediamine, and the temperature of the second temperature-programmed reaction in the process of step (2) is 270°C, the reaction time is 10h, and after the second temperature-programmed reaction is completed, the product can be separated from water, and dried at 120°C for 3h to obtain the product polyamide-imide resin.
[0058] The yield of the polyamide-imide resin in this example was 97.4 wt%.
[0059] The polyamide-imide resin of the present embodiment is tested for intrinsic viscosity, and the intrinsic viscosity of the product of the present embodiment is measured to be 0.4dL / g; the polyamide-imide resin of the present embodiment is subjected to differential scanning calorimetry Analysis (DSC) showed a glass transition temperature of 250°C.
[0060] The intrinsic viscosity of the polyamide-imide resins prepared accord...
PUM
| Property | Measurement | Unit |
|---|---|---|
| Intrinsic viscosity | aaaaa | aaaaa |
| Glass transition temperature | aaaaa | aaaaa |
| Intrinsic viscosity | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More