Preparation and application of tricresyl phosphate_industrial additives

Background and overview^[1][2]

Tricresyl phosphate is a colorless to light yellow transparent oily liquid, odorless, slightly fluorescent, stable, non-volatile, and flame retardant. It is a standard flame retardant plasticizer for synthetic rubber, polyester, and polyvinyl chloride. It can give polymers good wear resistance, weather resistance, mildew resistance, radiation resistance, and electrical properties. It can also be used as a gasoline additive. , lubricating oil additives and hydraulic oil.

Preparation^[1]

1. Add 17.8g mixed cresol and 0.37g catalyst TiSiW₁₂O₄₀/TiO₂ into the three-necked flask, stir and heat to 60°C, add 5 ml of phosphorus oxychloride dropwise, complete the dropwise addition within 1 hour, raise the temperature to 100°C, and react for 8 hours;

2. Filter out the catalyst and distill under reduced pressure. The resulting fraction is tricresyl phosphate.

Content detection^[3]

A method for detecting the content of tricresyl phosphate flame retardants in electronic and electrical rubber parts, including the following steps: (1) sample preparation; (2) extraction of tricresyl phosphate flame retardants: in the sample Add heavy metal powder, mix evenly and perform accelerated solvent extraction, and obtain the extract after extraction; (3) Extract purification: add the internal standard to the extract, mix well, and transfer the anti-aging agent to the solid-phase extraction cartridge, and then Elute with a mixed solvent, collect the eluate and concentrate to obtain a purified extract; (4) Determination of tricresyl phosphate flame retardants: Combine the purified extract and tricresyl phosphate containing internal standard The mixed standard solution was measured on a gas chromatography-mass spectrometer. After data processing and quantitative analysis, the content of tricresyl phosphate flame retardant was obtained. This method can effectively remove interfering impurities in rubber, fully extract tricresyl phosphate, have a high degree of purification, high detection sensitivity, and low sample cost.

Apply^[4-6]

A tricresyl phosphate modified low-smoke halogen-free flame-retardant cable material. The cable material consists of the following components by weight: 100 parts of polyolefin, 1 to 5 parts of tricresyl phosphate, and nanographene powder 2 to 8 parts of ferrocene, 5 to 8 parts of ferrocene, and 0.5 to 1.5 parts of dibutyltin dilaurate are prepared by mixing, stirring, kneading, extrusion and granulation. This flame-retardant cable material does not contain halogen elements, does not release toxic gases when burned, and is environmentally friendly. The oxygen index of the modified cable material can reach 36, and the UL94 flame retardant level reaches V-0, with flame smoke. The maximum density does not exceed 50 and the toxicity index does not exceed 2.0. It has low smoke, halogen-free, environmental protection and good flame retardant effect.

A solvent-free tricresyl phosphate modified epoxy heavy-duty anti-corrosion coating, the total amount of component A is: E44 epoxy resin 5~10%, NPPN-631 epoxy resin 5~10%, tricresyl phosphate Toluene ester 1~7.5%, oxyindene resin 1~7.5%, reactive diluent 1~5%, BYK defoaming agent 0.1~0.5%, HX leveling agent 0.1~0.5%, multi-functional rheological agent 1~4% , aluminum tripolyphosphate 5~10%, wollastonite powder 5~10%, talc 10~20%, activated silica 5~1%, other pigments and fillers 5~10%; Group B is: cardanol modified Neutral amine 10~30%, modified silane coupling agent 0.1~0.5%. Organic bentonite rheology additive This coating can be sprayed with one-component or two-component high-pressure airless spraying. It has strong adhesion, good corrosion resistance, low viscosity, and long pot life. It can be painted up to 300~μm in one time without sagging. Safe to use, energy saving and environmentally friendly.

An aviation-grade high-pressure resistant fuel with tricresyl phosphate as the base oil and a production method thereof. The ingredients are as follows: tricresyl phosphate T306: di(tert-butylphenyl)phenyl phosphate according to the weight ratio = 3.5~ 4.5:1.5~3, the percentage of other ingredients in the total weight is as follows: epoxy soybean oil octyl ester 0.3-0.5wt%, antioxidant TH-10100.5-0.6wt%, benzotriazole 0.8-1.1wt%, dibenzotriazole Methyl silicone oil 0.4-0.5wt%. This high-pressure resistant oil has the characteristics of low chlorine content, low acid value, high auto-ignition point and boiling point, and has the advantages of good lubricity, anti-wear, anti-aging, anti-foam, flame resistance and thermal stability.