Environmental protection high temperature lubricant release agent latest application

In recent years, with the strengthening of environmental protection requirements throughout the country, the brand of stearic acid esters (PETS, tetraester PETS-4, triester PETS-3, monoester PETS-1, is white) Flaky or beaded, CAS No.: PETS-4 is 115-83-3; PETS-3 is 28188-24-1) because of its high efficiency lubricity, high temperature thermal stability, environmental protection and biodegradability. The domestic, South Korean and Japanese markets are getting more and more attention. This series of products is not only widely used in the fields of PVC plastics and engineering plastics, but also gradually recognized in the fields of rubber processing, cosmetics, and oil drilling chemicals.

Pentaerythritol stearate has properties such as emolliency, thickening, and lubricity; its thermal stability is excellent, and the thermogravimetric analysis shows that it begins to decompose at 400°C (a weight loss of about 7%). Currently, foreign brands sold in China are mainly Lonza Group, Italy Hairbase, Corning, Germany, and Japan Oils. Compared with domestic manufacturers, these brands have more outstanding thermal stability and are most effective for transparent PC products. However, the prices are indeed much higher. The domestic production is mainly concentrated in Shandong, Jiangsu, and Guangdong. Although the quality of PETS is still hard to say to the level of imported brands, the application of low transparency requires low prices. Standards still have a good market space. In particular, in recent years, the newly developed rubber pre-dispersed rubber masterbatch formulations have increasingly added lubricant dispersant PETS. Market feedback is quite good.

First of all, PETS has the most significant applications in the field of thermoplastic engineering and modified engineering plastics. It can be said that its advantages of lubricity and high temperature resistance are irreplaceable: Due to its high thermal decomposition temperature, PETS is widely used in many polymer compounds for extrusion and injection molding. Used as a high-performance lubricant and release agent in the body, this product has been proven to prevent thermoplastic engineering plastics from adhering to the mold and equipment, even in complex structures. In addition, due to the addition of processing aids, even in the feeding process, the melting of raw materials in the feeding zone can be well prevented (bridging phenomenon). For example, for injection molding processing, it can be particularly beneficial to increase the filling rate of the injection molding material, so that the injection molded product can obtain a soft surface and a high degree of smoothness. Commonly-used engineering plastics include PC, PA, PBT, PC/ABS, etc., and can improve the exposure of glass fiber products and the dispersion of fillers. Generally, it is recommended to add 0.1 to 1% of the amount; specific details are as follows:

1. PETS is generally used as an external lubricant in polymer systems such as polycarbonate PCs and rigid PVC. PETS is a highly efficient lubricant that can be used at lower concentrations than most conventional lubricants.

2. PETS is used on ABS for high temperature Vicat softening point, which can greatly improve the processing fluidity of ABS engineering plastics. Through testing, this model only minimizes the softening temperature of ABS at high temperature Vicat softening point, even if In the case of a year-on-year increase of 2%, it also has outstanding performance. Added amount recommended: 0.5-2%

3. PETS can be used as PBT, PET and other two-way stretch polyester film for environmental protection high temperature anti-blocking agent, excellent thermal stability, very little volatility, can reduce the friction between the film and film, fully improve the film's anti-blocking performance Its excellent thermal stability makes it impossible to worry about degradation at high temperatures. The amount of added recommendation: 0.2-1.0%

4. The amount of PETS used in PC/ABS flame retardant materials is 0.6-1%;

5. The amount of PETS used in the glass fiber demulsifier for PA or PC is 0.6%;

6. PETS is also used (flame-retardant enhancement, toughening enhancement, reinforcement, flame retardant products) modified PA6, PA66 products as a high-temperature lubricant inside and outside the balance (improved the flow of PA material resin), but also has to prevent The glass fiber is exposed to improve the appearance of the product (also known as the glass fiber exposed agent). When the addition amount is about 0.5%, the test result shows that the glass fiber reinforced nylon made of it has a bright appearance and no glass fiber is exposed.

7. PETS can be used as a pigment dispersant for high-melting plastics in the production of plastic chemical masterbatches. For example, in the formulation of concentrated filled masterbatch, masterbatch, and flame retardant masterbatch, uniform dispersion of pigments, fillers, or flame retardants can be promoted; glass fiber reinforced engineering plastics can promote the dispersion of glass fiber in the resin and Combination, reduce exposure, improve product gloss. The outstanding thermal stability of PETS allows it to be used for high temperature processing of such systems without fear of degradation during processing.

8. PETS has excellent nucleating effect on partially crystalline engineering plastics, so it can significantly improve its transparency and surface finish.

Remarks: This product is a low melting point type product. It is recommended to use it after dehumidifying the base material.

Secondly, pentaerythritol stearate series products are being used more and more as raw materials for the production of rubber chemicals. Before PETS, they were mainly used for plastic solution and lubrication in the process of rubber plastication. They can be used directly as environmentally friendly and efficient rubber lubricants. Dispersants, which are now more commonly used in the production of pre-dispersed rubber masterbatch, have gradually become an essential dispersant component (currently a number of rubber pre-dispersed rubber masterbatch Are in procurement). Specifically, when the rubber industry is used as a dispersed lubricant component for rubber auxiliaries predispersed rubber masterbatch, the PETS-4 and PETS-3 have the effect of internal and external lubrication. PETS-4 focuses on external slip, PETS -3 focuses on internal slippage. (The processing aids for highly dispersible predispersed masterbatch often contain SRPW, stearic acid, PETS, fatty acid zinc, etc., because the processing temperature of pre-dispersed masterbatch generally does not exceed 80°C. When the material is discharged at 60°C, the main processing aid of the pre-dispersed masterbatch is changed to PETS or stearic acid, taking into account the melting point factor, and the addition amount is 3-5 phr.In the conventional EPDM, SBR, BR In weakly polar carriers such as stearic acid as internal lubricant and PETS as external lubricant, stearic acid will affect the speed, generally not recommended, but in some places stearic acid viscosity reduction effect can be considered; PETS not Will affect the * speed, and significant dispersion of the lubrication effect).

Remarks: In addition to considering internal and external lubrication, the influence on kneading and granulation should also be considered. During the kneading process, the external lubrication is too much, the mechanical force can not be effectively converted into shear force, which will lead to poor dispersion; internal lubrication should not be too much, too much The internal lubrication will precipitate on the surface of the polymer and powder, thereby reducing the friction with the mechanical surface, but instead play an external lubrication effect. Therefore, when determining the specific dosage, it is better to try several points according to the designed formula.

In addition, pentaerythritol stearate has been used as an auxiliary thermal stabilizer, high-efficiency lubricant, plasticizer, etc. for environmentally-friendly powder-composite polyvinyl chloride thermal stabilizers. When the lubricant composition is used, the amount to be added is 8-12%. Compared to the case where only **** or only stearic acid or PE wax is used, it has high thermal stability, good compatibility, and low added amount. , outstanding lubricating effect, inhibition of zinc burning and other advantages, belong to the organic auxiliary heat stabilizer. Because this product is environmentally friendly and non-toxic, it has excellent compatibility with PVC and can be directly used as a high-efficiency lubricant and auxiliary heat stabilizer in 105°C grade or other heat-resistant grades of PVC cable material, without precipitation, which can significantly increase the cable The extrusion speed of the material and the brightness of the processed product. PETS-3 focuses on internal sliding and PETS-4 focuses on external sliding. After the manufacturer's confirmation and **** combination effect compared to only **** or stearic acid, PE wax, etc. with better thermal stability, product surface smooth, consistent color benefits. Addition amount: 0.2-1.0 parts, especially PETS-3, the effect is more obvious.

In addition, major domestic oilfield chemical service providers are also using PETS-4 as an environmentally friendly raw material in the field of oilfield chemicals. The most outstanding advantages are their excellent thermal stability, lubricity, and flowability. Due to its biodegradability, low volatility, good aging resistance, resistance to extraction and electrical insulation, it can be added as an excellent lubricant component in oilfield drilling fluids.

In addition, pentaerythritol stearate is also used as emollients, thickeners and brighteners, etc., for cosmetic cosmetics, textile and leather processing, lubricant cutting oils, rust inhibitors, plasticizers and lamination In the industrial field.