Korea Kumho Petrochemical Co., Ltd.

Kee Yoon Roh

Jung Hee Jang

Nam Hyun Cho

Je Young Park

Jin Eok Kim

Sang Hun Jang

Jung Hei Choi

Yun Cheol Park

Yuncheol Park

Hee Su Kim

Je-young Park

A method of preparing a thiomethylphenol derivative is disclosed, the method including: (a) carrying out a primary reaction of a phenol derivative represented by the following Chemical Formula 2, a mercaptan derivative represented by RSH, and paraformaldehyde at a reaction temperature Tunder conditions in which a heterocyclic base having 3 to 10 carbon atoms and an acid are simultaneously present; and (b) carrying out a secondary reaction at a reaction temperature Tto prepare a thiomethylphenol derivative represented by the following Chemical Formula 1, wherein T<Tis satisfied.

Method of preparing a thiomethylphenol derivative

An embodiment of the present invention provides a method for preparing a phthalonitrile-based compound, comprising: (a) feeding a mixture comprising a phthalic acid-based compound and a nitrile-based compound into a first reaction part to react; (b) transferring a resulting product of step (a) to a second reaction part connected to the first reaction part to react under the condition of 350 to 400° C.; and (c) obtaining a phthalonitrile-based compound at a discharge part connected to the second reaction part, wherein the second reaction part has a length in a fluid flow direction which is 10 times or more of a square root of an average cross-sectional area perpendicular to the fluid flow direction.

Method for preparing phthalonitrile-based compound

An embodiment of the present invention provides a method for preparing hydrogenated bisphenol A, comprising: (a) heating a reactor in which bisphenol A, a solvent, and a ruthenium supported catalyst are added; (b) supplying hydrogen into the reactor to react; and (c) blocking the supply of hydrogen to react.

Method for preparing hydrogenated bisphenol A

Provided is an epoxy reactive diluent, wherein the content of a compound represented by Formula 1 below is 85% by weight or more based on a total weight of an epoxy reactive diluent composition:  wherein n is 0, 2, 4 or 6.

Epoxy reactive diluent and manufacturing method therefor

An additive composition includes a specific amount of &#x3b1;-methylstyrenated phenol, can be mixed with a main material part or curing agent part for paint, and can suppress the occurrence of a discoloration issue.

Additive composition and method of preparing the same

A heavy-duty epoxy coating composition including an epoxy resin, as a main substance, and styrenated phenol represented by Formula 1: 

Heavy-duty epoxy coating composition including styrenated phenol and method of preparing the same

The present invention relates to styrenated phenol useful as a curing agent or a plasticizing agent for an epoxy resin. More particularly, it relates to use of styrenated phenol, which has viscosity and curing properties similar to those of nonylphenol and exhibits superior curing properties for an epoxy resin, as a curing agent or a plasticizing agent for an epoxy-cured paint.

Styrenated phenol useful as curing agent or plasticizing agent for epoxy resin

A styrenated phenol compound in which a hydrazine or a diaminoalkane compound binds to a styrenated phenol, and a method of preparing the same are provided. The styrenated phenol compound may have improved exterior quality and storage stability of a product by maintaining a hardening stimulation property and plasticity and preventing discoloration when mixed with a hardener for an epoxy paint.

Styrenated phenol compound and a method of preparing the same

Provided is a styrenated phenol compound represented by Formula 1 in which styrenated phenol and hydroxylamine bind to each other: In Formula 1, n is one of integers of 1 to 3, and Rand Rare each hydrogen or one of C1 to C4 alkyl groups. The styrenated phenol compound may maintain curing stimulation property and plasticity, and prevent discoloration when being mixed with a curing agent for an epoxy paint, thereby enhancing exterior quality and storage stability of a product.

Growing community of inventors

Daejeon, South Korea

Kee Yoon Roh