Patent GB-628521-A (GB)
Title: New resinous compositions of matter
IPC: C08G16/02
Filed: 1947-07-16
Abstract: A heat-resinifiable composition is made by reacting formaldehyde with a sulphone compound containing the grouping -CH2-SO2-Ar, where Ar is an aryl or chlor-substituted aryl radicle, in the presence of an inert diluent (such as water, or methyl, ethyl or isopropyl alcohol, ethylene or diethylene glycol or a carbitol) under alkaline conditions at a temperature between room temperature and boiling point of the mixture.  From 1 to 6 moles. of formaldehyde (which may be an aqueous solution or paraformaldehyde) per mole. of sulphone compound may be employed.  Such sulphone compounds include those containing the grouping R-CH2 -SO2-Ar where R is hydrogen, alkyl, alkenyl or aryl radicle (including chlorsubstituted alkyl or aryl radicle) and an exemplary list of specific compounds is given.  A list of other suitable compounds of the type exemplified by ethylene bis phenyl sulphone, Ar-SO2-CH2-CH2-SO2-Ar, is also given. The product may be resinified by heating in a mould or by stoving a film poured from a solution in diethylene glycol, methanol, isopropanol, ethylene glycol or a carbitol, at about 130 DEG  to 200 DEG  C.  In examples, solutions in ethanol or methylated spirits containing some potassium hydroxide of (1) and (3) benzyl phenyl sulphone, (2) benzyl chlorphenyl sulphone, and (4) phenyl methyl sulphone, are reacted with aqueous formaldehyde or paraformaldehyde.  In the last example, the brown product is extracted with methylated spirits to give a white powder which is recrystallized from water and in which 1.75 moles of formaldehyde have reacted with 1 mole. of the sulphone.  The Provisional Specification describes also the reaction of formaldehyde with sulphones containing the group -CH2-SO2- and excludes from the invention those falling within the scope of the parent Specification.ALSO:IV (a) A heat resinifiable composition is made by reacting formaldehyde with a sulphone com pound containing the grouping -CH2-SO2- Ar, where Ar is an aryl or chlor-substituted aryl radical, in the presence of an inert diluent (such as water, methyl-, ethyl- or isopropylalcohol, ethylene- or diethylene-glycol or a carbitol) under alkaline conditions at a tem perature between room temperature and the boiling point of the mixture.  From 1 to 6 moles. of formaldehyde (which may be an aqueous solution or para formaldehyde) per mole. of sulphone, may be employed.  Such sulphone compounds include those containing the grouping R-CH2-SO2-Ar, where Ar is hydrogen, alkyl, alkenyl, or aryl radical (in cluding chlor-substituted alkyl or aryl radical) and an exemplary list of such compounds is given.  A list of other suitable compounds, of the type exemplified by ethylene-bis-phenyl sulphone Ar-SO2-CH2-CH2-SO2-Ar, is also given.  In examples: solutions of (1) and (3) benzyl phenyl sulphone; (2) benzyl chlor phenyl sulphone; (4) phenyl methyl sulphone, containing some potassium hydroxide, are reacted with aqueous formaldehyde or paraformaldehyde.  In the last example, the brown product is extracted with methylated spirits to give a white powder which is recrystallized from water and in which 1.75 moles. of formaldehyde have reacted with 1 mole. of the sulphone.  The Provisional Specification describes also the reaction of formaldehyde with sulphones containing the group -CH2-SO2- and ex cludes from the invention those falling within the scope of the parent Specification.