Patent GB-956008-A (GB)
Title: Resinous compositions
IPC: C08G73/02
Filed: 1961-01-20
Abstract: Poly-1:2-alkylene carbamates of the general formula: <FORM:0956008/C2/1> where R1 is hydrogen or an alkyl radical having from 1 to 8 carbon atoms, n is an integer greater than 1 and R is an n-valent organic radical are made by reacting 1:2-alkylene imines with chlorocarbonates of polyhydric phenols or alcohols preferably in the presence of a hydrogen chloride acceptor. Examples describe the preparation of:  (a) N:N1-bis-1:2-ethylene (1:4-butanediol) carbamate; (b) N:N-bis-1:2-ethylene (triethylene glycol) carbamate; (e) N:N1-bis-ethylene [1:11-isopropyl-iodene bis (p-phenyleneoxy)-di-2-propanol] carbamate and (h) N:N1-bis-1:2 ethylene resorcinol carbamate from ethylene imine and bis-chlorocarbonates.  Specification 956,007 is referred to.ALSO:A process for making a polymer comprises admixing a carboxyl group-containing prepolymer being substantially liquid at about 25 DEG  to 50 DEG C. when devoid of volatiles (i.e. having a maximum viscosity of the order of 10,000 poises), having an acid content ranging from about 0.1 to about 3 milliequivalents per gram and containing an average of more than 2 carboxyl groups with a poly-1,2-alkylene carbamate of the general formula: <FORM:0956008/C3/1> where R1 is hydrogen or an alkyl radical having from one to eight carbon atoms, n is an integer greater than one and R is an n-valent organic radical.  Specified pre-polymers are:-(I) branched polyesters, (II) dianhydride extended polyesters, (III) anhydride extended polyether glycols and (IV) acrylic addition copolymers, many examples being listed.  The Specification describes the preparation of carboxyl-containing prepolymers from:-(IA] adipic acid, diethylene glycol and trimethylol propane; (IB] adipic acid, diethylene glycol and glycerol; [IC] sebacic acid, neopentyl glycol and trimethylol propane; [ID] azelaic acid, oxypropylated bis-phenol-A and trimethylol propane; (IE] isosebacic acid, neopentyl glycol and trimethylol propane; [IF] trimesic acid, diethylene glycol and adipic acid; [IG] b -methyl-e -caprolactone and benzene tetracarboxylic acid; [IIA] pyromellitic dianhydride and a glycol terminated polyester derived from diethylene glycol and adipic acid; [IIIA] a hydroxy terminated polyether of butylene glycol and pyromellitic dianhydride; [IIIB] a glycerine, ethylene oxide and propylene oxide reaction product and succinic anhydride; [IIIC] an ethylene oxide, propylene oxide and ethylene diamine reaction product and succinic anhydride; [IVA] methoxyethylacrylate and acrylic acid and [IVb] butadiene and acrylic acid.  Many poly-1:2-alkylene carbamates are listed and their preparation exemplified.  Examples are given of the preparation of the polymers of the invention. Specification 956,007 is referred to.ALSO:In Example 15, an impregnated polyester fabric is made by immersing the fabric in a solution comprising chloroform, N:N1\h3-bis-1:2-ethylene (1:11-isopropylidene-bis-phenylene) carbamate and a carboxyl-containing polyester made from adipic acid, trimethylol propane and diethylene glycol, the impregnated fabric being dried and heat cured at 180 DEG C.  Specification 956,007 is referred to.