The function of sodium abietate

Rosin acid is a natural product, and a series of surfactants synthesized from it generally have good ecological properties, meeting the requirements of "raw material greening" for "green" surfactants. Research on the synthesis of surfactants using rosin began as early as the 1920s in foreign countries, and in the 1960s, rosin ester sulfates, rosin amine polyoxyethylene ethers, and others were synthesized. After entering the 1990s, due to the lack of rosin resources abroad, research on the synthesis of new surfactants using rosin as raw material did not go deep, and focused more on the application research of rosin based surfactants. China has done a lot of research work in this area and synthesized many new surfactants.

Rosin acid alkali metal salts are one of the early surface active agents of rosin acid, which are prepared by neutralizing rosin acid with alkali. Sodium rosinate is widely used in the production of laundry soap. It has the function of improving the performance of soap foam and preventing fatty acid corruption. Due to the influence of price, its application in laundry soap has been reduced in recent years. Another important use of rosin soap is as a sizing agent for papermaking, especially potassium soap modified with rosin (such as adducts with maleic anhydride), which can be used as a reinforcing sizing agent. Rosin soap solution has other properties when compounded with other substances, such as being able to form metal surface cleaning agents with ethylene glycol, acetic acid, water, and ethyl acetate. It can also be used as a lubricant and pigment dispersant when combined with ethylene glycol and ethylenediamine.

Sodium Rosinate is a hydrophobic surfactant with significant surface activity at the solution air interface, which can significantly reduce surface tension. When stirring a liquid mixed with sodium abietate, it is easy for air to mix into the liquid, producing high concentration bubbles. Moreover, due to the good elastic effect of sodium abietate, its surface rheological properties are also good when the solution reaches a certain concentration; And its film thickness is also relatively stable. These factors result in bubbles with high stability.

1、 Sodium abietate is commonly used in mortar to improve its flowability and reduce bulk density. Sodium abietate, as an air entraining agent, can introduce a large number of discontinuous, small, and closed bubbles at an appropriate dosage, which can improve the workability of mortar to a certain extent, and improve the pore distribution during early freezing, resisting the frost heave stress caused by the freezing of unhydrated water. Its mechanism of action is mainly reflected in the following aspects:

At an appropriate dosage, sodium abietate can improve the pore size distribution of cement-based materials and reduce the porosity to below 20%. At the same time, it can reduce the proportion of harmful macropores, increase the proportion of micropores that are beneficial for improving early frost resistance, and reduce the number of pore sizes. This is beneficial for the impermeability and durability of cement-based materials.

When subjected to early freezing, a high amount of sodium abietate used as an air entraining agent can lead to a decrease in strength, which is related to the high porosity of the specimen. At the same time, the increased harmful pores have a greater anti freezing effect than the harmless pores.

The improvement of early frost resistance by sodium abietate is mainly due to its effect on the pore structure. When there is fly ash and activators present, it can promote the hydration process, while the improvement of hydration process for other cementitious materials such as cement is not significant.

2、 Sodium abietate can be used to prepare a highly stable protective lubricating oil, which is composed of mineral base oil, viscosity index improver, extreme pressure additive, antioxidant, friction moderator, and pour point depressant. The viscosity index improver is polyacrylate, the extreme pressure additive is chlorinated paraffin, the antioxidant is glutathione, the friction moderator is sodium abietate, and the pour point depressant is polyoxyethylene alkylamine. The present invention has the characteristics of high stability, good low-temperature fluidity, oxidation resistance, good wear resistance, and good lubricity.

3、 Used for preparing a slag composite activated grinding aid. The composition and mass ratio of the grinding aid are: 5-10% water glass, 5-10% sodium carbonate, 3-8% sodium abietate, 12-20% betaine mother liquor, 7-12% non-ionic surfactant, 2-10% molasses, 5-10% water-soluble polymer, and the remaining amount of water. The preparation method is to add water glass, sodium carbonate, betaine mother liquor, and nonionic surfactant to water at 40-65 ℃ in sequence according to the above mass ratio, and stir evenly; Then, sodium abietate, molasses, and water-soluble polymer are added and stirred evenly to obtain a liquid slag composite activated grinding aid product. The present invention reduces both production costs and environmental hazards, and has stable application performance. It has significant effects in activating slag for grinding and improving the physical properties of cement.

4、 Used for preparing a water-soluble pressure-sensitive adhesive. Including the following raw materials by weight: 10-15 parts of vinyl acetate butyl acrylate copolymer, 20-25 parts of sodium rosinate, 40-60 parts of vinyl acetate ethylene copolymer lotion, 10-20 parts of glycerol, 10-20 parts of ethanol and 10-15 parts of water; Using sodium rosinate as emulsifier, vinyl acetate butyl acrylate copolymer and vinyl acetate ethylene copolymer lotion as the main adhesive of pressure sensitive adhesive, supplemented by glycerin, ethanol and water, a water-soluble pressure sensitive adhesive is provided, which has good pressure sensitivity, water solubility and dispersion properties.

5、 Used for preparing a plastic packaging bag for antibacterial medicine. The antibacterial pharmaceutical plastic packaging bag is made of the following weight components: 50-60 parts of chlorosulfonated polyethylene, 15-25 parts of ethylene vinyl acetate resin, 6-13 parts of polyphosphate amine, 3-9 parts of ethylene octene copolymer, 2-5 parts of sodium abietate, 1-3 parts of moisture-proof and insect proof agent, 8-15 parts of triphenyl phosphate, 6-12 parts of oleic acid amide, 2-6 parts of isothiazolinone, 3-8 parts of nano alumina, 1-3 parts of titanium ester coupling agent, 8-14 parts of rosin glyceride, 5-11 parts of bamboo fiber, 6-14 parts of organic silicone oil, 4-8 parts of antibacterial color masterbatch, and 2-7 parts of toughening agent. Ingredients: 3-8 parts xanthan gum, 1-5 parts sodium borate. The antibacterial pharmaceutical plastic packaging bag in the present invention has good antibacterial effect and is thermodynamically stable