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Phenol-formaldehyde resins, as a group, are formed by a step-growth polymerization reaction that can be either acid- or base-catalysed.Since formaldehyde exists predominantly in solution as a dynamic equilibrium of methylene glycol oligomers, the concentration of the reactive form of formaldehyde depends on temperature and pH.
Para tertiary butylphenol formaldehyde resin, also known as p-tert-butylphenol-formaldehyde resin (PTBP-FR), is a thermoplastic phenol-formaldehyde resin found in commercial adhesives, particularly glues used to bond leather and rubber. It has broad usage in a large variety of industries and can be found in many household textile products and ...
Another method entails methylation of phenol with methanol over a solid acid catalyst, often comprising magnesium oxide or alumina. Temperatures above 300 °C are typical. Anisole converts to cresols under these conditions. [5] [6] Another isomer of cresol is called Benzyl alcohol, or alpha-cresol (α-cresol).
Phenol-formaldehyde resins (PF) were the first commercially relevant impregnation resins, made by reacting phenol and formaldehyde, creating a polymer network inside of the wood upon curing. [7] Phenol can react with formaldehyde at the ortho and para positions, generating mono, di, and trimethylolphenol as the reaction products. [6]
Kumho P&B Chemicals provides BPA (bisphenol A), MIBK (methyl isobutyl ketone), epoxy resin, phenol, and acetone. In terms of production capacity, it is 5th BPA maker and 9th phenol maker in the world. (founded in 1976) Kumho Polychem provides EPDM(ethylene propylene diene monomer) with 4th largest production capacity in the world. (founded in 1985)
Hexion Inc. or Hexion (previously Momentive Specialty Chemicals) [2] is a chemical company based in Columbus, Ohio.It produces thermoset resins and related technologies and specialty products.
A common method for hydroxymethylation involves the reaction of formaldehyde with active C-H and N-H bonds: R 3 C-H + CH 2 O → R 3 C-CH 2 OH R 2 N-H + CH 2 O → R 2 N-CH 2 OH. A typical active C-H bond is provided by a terminal acetylene [1] or the alpha protons of an aldehyde. [2]