Titanate coupling agent manufacturers come to learn about the application of organic titanium coupling agents
Titanate coupling agent manufacturers have learned that the application of organic titanium coupling agents improves the compatibility of inorganic fillers and resins, improves processing flow, increases filling amount, improves physical and mechanical properties of products, improves product surface smoothness, and reduces production costs. Wait.
Usage of organic titanium coupling agent:
Pretreatment method: First, mix the titanate coupling agent with the filler to make the active filler (add it by spraying or dripping to avoid one-time concentrated addition. The stirring time is 10-15 minutes, and the temperature is appropriately increased (100-120) The coupling reaction can be accelerated to complete the reaction. The reactive filler is then mixed with resin and other additives for processing
Direct addition method: All ingredients are mixed with resin for processing. However, the temperature of the material should be controlled to be lower than the decomposition temperature of the coupling agent, and attention should be paid to the order of addition. Avoid the reaction of other auxiliaries with the coupling agent and reduce the coupling effect.
The titanate coupling agent manufacturer said that the priming method (for coating and bonding): the organic titanium coupling agent itself is not a binder, but in most cases it is used as a binder additive, but sometimes It can also improve the adhesion of some polymers (such as polyolefins, PET, rubber, etc.). ) to metals, glass, ceramics, etc. The coupling agent can be diluted to 5-10% with organic solvents such as alcohol and benzene, and then the solution is coated on the substrate to be treated. The substrate should be baked at 120°C for 5-10 minutes. Adhesives should be applied to the treated substrate for bonding, or directly heated to bond with the polymer. In this application, some organofunctional silanes (ie, silane coupling agents) can be added to the formulation for better coupling and adhesion promotion.
Within the general reasonable range (0.1-2.0%), the performance of the organometallic ester coupling agent improves with the increase of the dosage, but the dosage exceeding the reasonable range may be counterproductive. The finer the particle size of the pigment and filler, the more pores, the larger the surface area, and the more coupling agent dosage.
Manufacturers of titanate coupling agents remind everyone of the precautions for the function of organic titanium coupling agents:
1. The titanate coupling agent is easy to be hydrolyzed, so avoid water. Therefore, the filler needs to be dried or stirred in a high mixer for a few minutes before adding to increase the temperature to remove excessive separation, and then added again to prevent the coupling agent from being added prematurely and reacting with excess moisture on the filler to hydrolyze, thereby failing or reduce its effect.
2. After the filler is pretreated, the active ingredients in the ingredients need to be added to avoid first reacting with titanate and reducing the coupling efficiency.
3. Titanate coupling agent is easily exchanged with polyester and ester plasticizers to varying degrees, so try to avoid simultaneous use. (At this time, the filler should be treated by the pretreatment method)
4. The titanate coupling agent and the silane coupling agent have a synergistic effect. To prevent them from taking protons first, the organosilane should be added first, followed by the titanate coupling agent.
5. During storage, it should be protected from light, heat insulation and moisture, and it should be kept at room temperature for one year.