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o-phenylphenol application - haihang industry

Jun. 13, 2019

o-phenylphenol(2-Hydroxybiphenyl) is an important fine chemical product with a wide range of uses. Mainly used in the production of bactericidal preservatives, flame retardants, vegetable and fruit preservatives, can also be used in printing and dyeing auxiliaries, pharmaceuticals and dye intermediates.

The following is a detailed introduction to the application of o-phenylphenol


O-phenylphenol can be used as a raw material for the production of antiseptic bactericides. It is a good preservative because of its broad-spectrum sterilization and mold-removing ability, and its low toxicity and tastelessness. In the mold and preservation of fruits and vegetables, the citrus mold, the treatment of lemon, pineapple, melon, fruit, pear, peach, tomato, cucumber, etc., can reduce the rot to a minimum. The United Kingdom, the United States, Canada and other countries allow a wider range of fruits, including apples.

O-phenylphenol can also be used as an antiseptic and bactericide in cosmetics, wood, leather, fiber and paper, and is generally used at a concentration of 0.15% to 1.5%. The United States Environmental Protection Agency (EPA) allows nearly 200 kinds of bactericidal soaps, bactericidal deodorant lotions, and antiseptic preservatives with o-phenylphenol or its sodium salt as the main component, and it is considered to be non-toxic. The annual use of o-phenylphenol in this field alone exceeds 1 million pounds.

Synthesis of new phosphorus-containing flame retardant materials

Since the polymeric material containing the organic phosphorus compound forms a graphite-like carbonized film on the surface of the material during combustion, the polymer is isolated from the air and has good flame retardant properties. The advantages are high flame retardant efficiency, low volatility, good oil and hydrolysis resistance. Polymeric materials containing organic phosphorus compounds are becoming more widely used and will gradually replace the inorganic and halogen-containing flame retardant materials used today. Using o-phenylphenol as raw material, a new type of phosphorus-containing flame retardant intermediate DOPO can be synthesized, which mainly has the following applications:

(1) Synthetic flame retardant polyester

DOPO is a raw material reacted with itaconic acid to form an intermediate ODOP-BDA, which can partially replace ethylene glycol to obtain a novel phosphorus-containing flame retardant polyester. Studies have shown that when the phosphorus content in PET and PEN reaches 0.75% and 0.5%, respectively, the polyester exhibits a good flame retardant effect. Calculated in 10,000 tons of polyester, if 5% of them are phosphorus-containing flame retardant polyesters, o-phenylphenol should be used for more than 50 tons.

(2) Synthetic flame retardant epoxy resin

Epoxy resin has good bonding properties and electrical insulation properties. It is widely used in adhesives, electronic instruments, aerospace, coatings and advanced composite materials. In 2004, the world's epoxy resin consumption has reached more than 200,000. Tons per year. DOPO reacts with phenylhydrazine to form ODOPB, partially replacing bisphenol A to form a new epoxy resin with flame retardant properties. Studies have shown that the newly synthesized phosphorus-containing flame retardant epoxy resin has better flame retardant effect than the 17.26% Br flame retardant epoxy resin when the P content is 2.1%, and does not produce smoke, and the thermal stability is also lower than that. The flame retardant epoxy resin is good.

(3) Enhance the organic solubility of the polymer

Using DOPO as raw material, 2DOPO-A is synthesized to replace the monomeric DABP of synthetic polyamide. The new polyamide is soluble in solvents such as NMP, DMAc, DMF, and DMSO, and its thermal stability and resistance at high temperatures. The flammability has also improved significantly.

(4) Intermediates for synthesizing antioxidants

The Taiwan patent reported the use of DOPO to synthesize phosphorus-containing antioxidants, antioxidants for unsaturated polyesters, phenols and greases, used in copper-based sheets of computers, and has good thermal stability.

(5) Stabilizer for synthetic polymer materials

The Japanese patent reported a stabilizer for a polymer material synthesized by DOPO, which is added during processing of polyethylene, polypropylene, and polyvinyl chloride to improve the stability of the polymer compound during hot working.

(6) Synthetic luminescent precursor

Organic light-emitting diodes are important optoelectronic materials. Sun et al. use DOPO derivatives as monomers to synthesize polymers with luminescent properties. DOPO derivatives act as a group and emit blue light with a wavelength of 325-350 nm. Organic light emitting diodes.

As a monomer for synthesizing new polymers

Phenolic resin has the advantages of high mechanical strength, good electrical insulation performance, excellent heat resistance and flame retardancy, and is widely used in the preparation of FRP, molding compound, paint, adhesive, etc. However, phenolic resin also has disadvantages such as heat resistance. Poor, etc., replacing phenol with o-phenylphenol to synthesize a new phenolic resin. This resin has high thermal stability and low water absorption and can be used to prepare paints with excellent water and alkali stability.

Synthetic application

Synthetic new drugs

According to reports, o-phenylphenol is synthesized for use in cholesterol ester hydrolysis inhibitors, antispasmodic drugs, anti-inflammatory drugs and analgesics, and certain dermatological drugs.

Synthetic fiber dye carrier

O-phenylphenol and its water-soluble sodium salt can be used as a dye carrier for polyester fibers, and can also be used as a carrier for hydrophobic synthetic fibers such as polyvinyl chloride or polyester.

other application

O-phenylphenol can also be synthesized as a developer for the synthesis of pressure-sensitive and heat-sensitive papers, and o-phenylphenol can be reacted with BCl3 to obtain an antioxidant and an anti-fatigue agent for lubricating oils. The compound obtained by reacting o-phenylphenol with glycerin can be used for fiber modification, stabilizer for chlorine-containing organic compounds, synthetic resin reactive diluent and modifier, and also a reaction intermediate.

The above is the main use of o-phenylphenol in haihang industry. If you are interested in o-phenylphenol, please contact us. Email: info@haihangchem.com

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