Patent GB-1103305-A (GB)
Title: Acetylenically unsaturated polymers
IPC: C08G64/16
Filed: 1965-02-10
Abstract: The invention comprises linear, normally solid, high molecular weight polyesters, polycarbonates and polyurethanes of acetylenic glycols of formula <FORM:1103305/C3/1> where R is a hydrogen atom or a hydrocarbon radical containing 1 to 10 carbon atoms (e.g. an alkyl, aryl or cycloalkyl radical). The polymers may be cross-linked by heating them.  Polyesters are made by condensing the acetylenic glycol with a di-acid halide of a dicarboxylic acid, possibly in the presence of a solvent (e.g. a hydrocarbon and/or a chlorinated hydrocarbon).  Specified dicarboxylic acids are adipic, azelaic, sebacic and tetramethyl succinic acids; cyclobutane, cyclopentane and cyclohexane dicarboxylic acids; and phthalic, isophthalic, terephthalic, diphenic and benzophenonedicarboxylic acids and their nitro-, halo-, cyano- and alkyl-substitution products. Examples describe the preparation of polyesters from (1) 2 - butyne - 1,4 - diol and isophthaloyl chloride; (2) 2 - butyne - 1,4 - diol and the di-acid chloride of 1,4-cis-cyclohexanedicarboxylic acid; (3) 3-hexyne-2,5-diol and terephthaloyl chloride.  Polycarbonates are made by the polycondensation of (a) a bis-haloformate of the acetylenic glycol with a bis-phenol, the bis-phenol having been purified by filtration through a column of magnesia-silica followed by fractional distillation or (b) the acetylenic glycol with a bishaloformate of a bis-phenol. Reaction may be effected in the presence of an organic solvent whilst sweeping out evolved hydrogen halide with argon, or in the presence of an organic solvent and pyridine, or by the normal interfacial process.  Examples describe the preparation of polycarbonates by reacting (5), (6), (7), (9) and (10) 2-butyne-1,4-diol bischloroformate and bisphenol-A, 1:3-bis-(p-hydroxyphenyl)-1 - ethylcyclohexane, 2:2 - bis - (2,3,4,6 - tetra-chloro - 4 - hydroxyphenyl) - propane, acetophenone bisphenol, cyclohexanone bisphenol, 2:2 - bis - (2,6 - dichloro - 4 - hydroxyphenyl)-propane, bis - (4 - hydroxyphenyl)sulphone, bisphenol of 1,4-dimethylene, cyclohexanol, bisphenol of a ,a 1-dichloro-p-xylene, bisphenol of di(chloromethyl)durene or one or more bisphenols obtained by reacting phenol with a -pinene; (8) 2-butyne-1,4-diol and bisphenol-A bischloroformate.  Polyurethanes are made by reacting a bishaloformate of the acetylenic diol with a secondary diamine (e.g. piperazine or 2,5-di-methylpiperazine) by the normal interfacial process. Example (11) describes the manufacture of a polyurethane from 2-butyne-1,4-diol bischloroformate and trans-2,5-dimethyl-piperazine.  Polycarbonateurethanes are obtained by including a bis-phenol in the above reaction. Examples (12)-(14) describe the manufacture of polycarbonateurethanes by reacting 2-butyne-1,4-diol bischloroformate, trans-2,5-di-methylpiperazine and bisphenol-A, 1,3-bis-(p-hydroxyphenyl) - 1 - ethylcyclohexane or a 60:40 mixture of <FORM:1103305/C3/2>  Uses.-Films, fibres, adhesives, mouldings, electrical insulation, protective coatings.ALSO:Bischloroformates of acetylenic glycols of formula <FORM:1103305/C2/1> where R is a hydrogen atom or a hydrocarbon group containing less than 10 carbon atoms (e.g. alkyl, cycloalkyl or aryl) are made by reacting the glycol with phosgene and thereafter purifying the resulting bischloroformate by filtering it through a column of magnesia-silica.  In Example (4), N,N-dimethylaniline dissolved in methylene chloride was added to a mixture of 2-butyne-1,4-diol and phosgene dissolved in methylene chloride.  The resulting bischloroformate was then extracted with ether, the extract filtered through diatomaceous earth, evaporated, the chloroformate residue dissolved in benzene and filtered through magnesia-silica. The bischloroformate remaining after evaporation was fractionally distilled.