http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1123395-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c7ad58d3c0b071069a8ee0cb8c8ba2e8 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-3823 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-3842 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-0804 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-38 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-10 |
| filingDate | 1966-06-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_de388687871a89135c817dbb1d7350c5 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b8d4300af640fff947627d1c6800cd3f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a50cbe2c68839d6d45373342ff63d881 |
| publicationDate | 1968-08-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1123395-A |
| titleOfInvention | Production of cross-linked polyurethanes |
| abstract | Cross-linked polyurethanes are prepared by reacting a polyhydroxyl compound having reactive hydrogen atoms and a molecular weight of 300 to 20,000, a polyisocyanate and a compound having at least one reactive hydrogen atom and at least one N-alkoxymethyl group, and if desired a chain extending agent, and allowing the cross-linking to occur by drying and/or curing the polyurethane. Conventional polyisocyanates and polyhydroxyl compounds may be used. The compounds containing at least one reactive hydrogen atom and at least one N-alkoxymethyl group which may be used are N-alkoxymethyl-ureas, urethanes, amides, thioureas, guanidines, melamines and tetrahydropyrimidinones especially adducts of alkoxymethyl isocyanates with diethanolamine, diisopropanolamine, diethylenetriamine, pentaerythritol, alkylene bis - (N - alkoxymethyl-hydroxyethylurethane) and the adducts of alkoxymethyl - (meth)acrylamide and (meth)acrylic acid hydroxypropyl ester methoxymethylurethane with diethanolamine. Chain extending agents which are diols, triols, diamines, aminoalcohols, hydrazines or water may also be added to the reaction mixture. The N-alkoxymethyl compounds may be reacted with polyisocyanate together with the polyhydroxyl compound but it is preferred to first form a prepolymer from the polyhydroxyl compound and the polyisocyanate and then to react this with the N-alkoxymethyl compound. In order that cross-linking does not take place during the preparation of the polyurethane the reaction is carried out (a) at low temperatures e.g. below 100 DEG C.; or (b) in the presence of an inert solvent; or (c) in neutral or slightly basic conditions. The polyurethanes which are modified with the N-alkoxymethyl compound preferably also contain anionic or cationic groups. Such groups may be introduced by including in the reaction mixture e.g. (1) a glycol or diamine and carrying out the salt-formation with alkylating agents or acids; (2) a reactive halogen diol followed by reaction with a tert.-amine or a sulphide; (3) taurine salts, carboxylic acids and anhydrides thereof, hydroxy- and amino-carboxylic acids, sulphonic acids, lactones, sultones or cyclic sulphates with aliphatic or aromatic diamines or aminodiols or alternatively the polyurethane containing N-alkoxymethyl groups may subsequently be reacted with compounds imparting a salt-type character e.g. with b -chloroethyl isocyanate and pyridine. |
| priorityDate | 1965-06-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 47.