Patent GB-919861-A (GB)
Title: Process for the production of cross-linked plastics from poly-n,n-ethylene ureas
IPC: C08G18/10
Filed: 1960-06-16
Abstract: A process for the production of plastics comprises reacting a polyisocyanate with an organic compound containing at least one hydroxyl group, the ratio and nature of the components being such that an intermediate results with at least two isocyanate groups, reacting the intermediate with an equivalent or smaller quantity of a 1:2-alkylene imine of the general formula <FORM:0919861/IV(a)/1> (in which the groups R1, R2, R3 and R4 which may be the same or different represent hydrogen atoms or alkyl, phenyl or aralkyl groups), and cross-linking the resultant poly-N:N-ethylene urea by heating at an elevated temperature or by the use of acid cross-linking accelerators at room temperature or above.  Specified hydroxyl group-containing compounds are monoand polyhydric alcohols; polyhdric phenols; alkylene oxide polymerization products; reaction products of alkylene oxides with polyols, amines, amino alcohols, polycarboxylic acids, hydroxycarboxylic acids, polycarboxylic acid amines and sulphoamides; polyacetals; polyesters and polyesteramides, many such compounds being listed.  Lists are also given of the polyisocyanates, alklene imines and crosslinking accelerators and hardening agents which may be used in the process of the invention.  The examples describe the preparation of polymers from ethylene imine and reaction products derived from:- (1) a linear polypropylene glycol ether and toluylene diisocyanate; a linear polypropylene glycol ether and (a) 4:41-diphenyl methane diisocyanate, (b) hexamethylene diisocyanate, (c) m-phenylene diisocyanate, (d) 1:3-diisopropyl-4:6-diisocyanate and (e) 1-methyl-3:5-diethyl-2:4-diisocyanate: (3) a polyethylene glycol ether and toluylene-2:4-diisocyanate; (4) castor oil and toluylene diisocyanate; (5) a propylene oxide-trimethylol propane reaction product and toluylene-2:4-diisocyanate; (6) a propoxyated-4:41-dihydroxy diphenyl dimethyl methane and toluylene diisocyanate; (7) a polybutylene glycol ether and toluylene diisocyanate; (8) triethylene glycol and toluylene diisocyanate; (9) octadec-1:10-ene-1:2-diol and hexamethylene diisocyanate; (10) benzyl alcohol and 1:3-xylene-2:4:6-triisocyanate; (11) 4:41-dihydroxy diphenyl methyl methane and toluylene-2:4-diisocyanate; (12) a polyisocyanate derived from trimethylol propane and toluene-2:4-diisocyanate and phenol; (13) hydroxyethylated-4:41-dihydroxy diphenyl methyl methane and p toluylene diisocyanate; (14) a polyester derived from adipic acid, diethylene glycol and trimethylol propane and toluylene-2:4-diisocyanate; (15) hexane-1:2:6-triol, stearyl isocyanate and toluylene-2:4-diisocyanate; (16) trimethylol propane, hexamethylene diisocyanate and butyl isocyanate; (17) polypropylene glycol ether and hexamethylene diisocyanate; (18) dehydrated polyethylene glycol and toluylene-diisocyanate; (19) hydroxyethylated butane-1:4-diol, benzoyl chloride and toluylene-2:4-diisocyanate and (20) and (21) dehydrated hydroxyethylated triethanolamine, benzoyl chloride and toluylene-2:4-diisocyanate.  Specifications 798,204 and 840,097 are referred to.