Patent GB-839186-A (GB)
Title: Improvements in or relating to the manufacture of polymeric materials
IPC: C08G18/18
Filed: 1955-12-01
Abstract: N - (2 - Diethylaminoethyl) - acetamide is prepared by reacting b -diethylaminoethylamine with acetic anhydride.  Similarly prepared is N - (3 - diethylaminopropyl) - acetamide.  N - (2 - Diethylaminoethyl) - benzamide is prepared by adding phosphorus oxychloride to a refluxing mixture of benzoic acid and b -diethylaminoethylamine.  b  - Diethylaminopropionamide is prepared by reacting diethylamine and acrylamide.ALSO:A process for the manufacture of cellular polymeric materials by the catalysed reaction of polyesters with organic polyisocyanates is characterized in that there is used as catalyst a tertiary amine containing an amido or mono-substituted amido group.  Preferably the tertiary nitrogen atom in the catalyst is linked to three carbon atoms, none of which carries a double bond, for example to three aliphatic or cycloaliphatic radicals. Examples of suitable amines are N-(2-diethylaminoethyl)-benzamide, N - (2 - diethylaminoethyl) - acetamide, N - (3-diethylaminopropyl) - acetamide and b  - diethylamino - propionamide.  The polyesters may advantageously be those described in Specification 790,420.  Fillers and flame-proofing agents may be added to the reaction mixture as dry powder or as premixed pastes with the polyester, the polyisocyanate tricresyl phosphate or water.  In a typical example (1) a cellular material is prepared by reacting a polyester (from diethylene glycol, pentaerythritol and adipic acid) with toluene-2 : 4- and 2 : 6-diisocyanates and a mixture of N-(2-diethylaminoethyl) - benzamide, an emulsifying agent (from diethylamine and oleic acid) and water. Further examples relate to the use of a diethylene glycol/pentaerythritol glutorate copolymer of other catalysts mentioned and of other emulsifying agents.  Examples in which the catalyst is extracted from the final product with benzene are also given.  The Provisional Specification specifies as the catalyst a tertiary amine containing groups which are reactive to isocyanates, there being mentioned (in addition to amido) hydroxyl, primary and secondary amino groups and ureido groups.  Additional catalysts specified are 2-diethylaminoethylamine, 2-diethylaminothanol, triethanolamine, bis - (diethylaminoethyl) amine and 2 : 4 : 6-tris-(dimethylaminomethyl) phenol and examples of their use are given.  Specifications 553,733 and 839,183 are also referred to.ALSO:A process for the manufacture of cellular polymeric materials by the catalysed reaction of polyesters with organic polyisocyanates is characterised in that there is used as catalyst a tertiary amine containing an amido or mono-substituted amido group.  Preferably the tertiary nitrogen atom in the catalyst is linked to three carbon atoms none of which carries a double bond. Examples of suitable amines are N-(2-diethylaminoethyl)-benzamide, N-(2-diethylaminoethyl)-acetamide, N-(3-diethylaminopropyl-acetamide and b -diethylamino-propionamide.  The polyester may be those described in Specification 790,420.  Fillers and flame-proofing agents may be added to the reaction mixture as dry powder or as premixed pastes with the polyester, the polyisocyanate, tricresyl phosphate or water.  In a typical example (1) a cellular material is prepared by reacting a polyester (from diethylene glycol, pentaerythritol and adipic acid) with toluene 2 : 4 and 2 : 6 diisocyanates and an mixture of N-(2-diethylamino-ethyl)-benzamide, a emulsifying agent (from diethylamine and oleic acid) and water. Further examples relate to the use of a diethylene glycol/pentaerythritol glutorate copolymer, of the other catalysts and of other emulsifying agents. Examples in which the catalyst is extracted with benzene from the final product are also given.  The Provisional Specification specifies as the catalyst a tertiary amine containing groups which are reactive to isocyanate, there being mentioned (in addition to amido) hydroxyl, primary and secondary amino and ureido groups. Additional catalysts specified are 2-diethylaminoethylamine, 2-diethylaminoethylethanol, triethanolamine, bis-(diethylaminoethyl) amine and 2 : 4 : 6-tris (dimethylaminomethyl) phenol, and examples of their use are given. Specifications 553,733, 839,183 and French Specification 805,377 also are referred to.