Patent GB-987354-A (GB)
Title: Poly(hydroxyalkyl) hydrazine compounds
IPC: C08G18/50
Filed: 1963-05-23
Abstract: The Specification describes compounds of formula <FORM:0987354/C2/1> wherein R is an alkyl radical or H(OR111)m-(OR11)n, R11 is an at least C3 alkylene radical, R111 is an at least C2 alkylene radical, n is an integer of at least 1 and m is O or an integer. These compounds are produced by reacting hydrazine or a monoalkyl hydrazine with an at least C3 alkylene oxide and optionally reacting the polyhydroxyalkylhydrazine so formed with further alkylene oxide. In examples, m is O and (a) R11 is propylene, R is H(OC3H7)n and the four " n " total 6.75, 6.8, 7.0, 11.0 or 4; (b) R11 is butylene, R is HOC4H9, and each n is 1.  Specifications 769,682, 798,209, 840,097, 843,703,  U.S.A.  Specifications 1,922,459, and 2,950,307 are referred to.ALSO:The Specification describes compounds of formula <FORM:0987354/C3/1> wherein R is an alkyl radical or H(OR111)m (OR11)n, R11 is an at least C3 alkylene radical, R111 is an at least C2 alkylene radical, n is an integer of at least 1 and e.g. up to 30 and m is O or an integer.  Those compounds of M.W. 1500-3500 and wherein R11O is oxypropylene are preferred.  These compounds are produced by reacting hydrazine or a monoalkyl hydrazine with on at least C3 alkylene oxide and optionally reacting the polyhydroxyalkylhydrazine so formed with further alkylene oxide.  A process for preparing cellular polyurethanes comprises reacting, in presence of a blowing agent, an organic polyisocyanate with a compound of the above formula and preferably also another polyhydroxy compound.  The latter may be a polyhydric polyester, polyester amide, polyether, polythioether or polyacetal.  Suitable polyisocyanates are 2,4- and 2,6-toluylene, m-and p-phenylene, 4,41-diphenylmethane, 4,41-diphenylene, 1,5-naphthalene, hexamethylene and decamethylene diisocyanates and triphenylmethane triisocyanate, including crude mixtures, as well as polyisocyanate/polyol products containing -NCO groups and triazine derivatives of such isocyanates. Blowing agents may be water and/or halohydrocarbons, e.g. CCl2F2, CCl3F, CCl2F2 and C2Cl2F4. Suitable catalysts are tertiary amines and organometallic compounds including salts.  Other additives such as castor oil, castor-oil-sulphuric acid esters or salts, addition products of alkylene oxides with hydroxyl or amino compounds, paraffin oils and silicone oils may also be present.  In examples, fine-pored rigid foams were prepared from mixtures containing (1) compounds of the above general formula, wherein m is O and (a) R11 is propylene, R is H(OC3H7)n and the four "n" total 6.75, 6.8, 7.0, 11.0 or 4, (b) R11 is butylene, R is HOC4H9 and each n is 1; (2) 4,41-diphenylmethane diisocyanate; (3) polysiloxane polyalkylene glycolate; (4) optional ingredients selected from (i) 1,1,1-trimethylol propane/propylene oxide polyether, (ii) adipic acid/phthalic anhydride/oleic acid/1,1,1-trimethylolpropane, (iii) permethylated aminoethylpiperazine, (iv) dimethylbenzylamine, (v) sodium-castor oil sulphate (50% H2O), (vi) CCl3F.  Specifications 769,682, 798,209, 840,097, 843,703 and U.S.A. Specifications 1,922,459 and 2,950,307 are referred to.