http://rdf.ncbi.nlm.nih.gov/pubchem/patent/TW-200535196-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2c75de165cb9ebb01bc20b9669fa55fd http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_93e2a26aee0e94ddfd69fb4ee5a360ec http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d74c50b5d33dc237761cda4de2a14004 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B67-46 |
| filingDate | 2004-04-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f7958106242ed80012e6293d50fb689f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a3f9e9e9eb87d3f34c6e5958f92a9dfd http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d0aa97299d1edcfd2440e61657654f33 |
| publicationDate | 2005-11-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | TW-200535196-A |
| titleOfInvention | A method for preparing ultra fine aqueous polyurethane dispersions |
| abstract | Disclosed is a method for preparing ultra fine aqueous polyurethane dispersions derived from carboxylic polycaprolactonediols by a prepolymer process followed by a dispersing procedure and then chain extended wherein a modified dispersing procedure is involved. First, a polyurethane prepolymer solution is prepared by reacting a diisocyanate, a carboxylic polycaprolactonediol, a dihydroxy methylalkanoic acid and a tertiary amine as the neutralizing agent in the presence of a catalyst in a volatile polar solvent. The polyurethane prepolymer solution is mixed with a small amount of water step by step before dispersing. Then, enough amount of water was added to obtain a prepolymer dispersion. The prepolymer dispersion is chain extended with an aqueous diamine solution. The volatile polar solvent is then removed to obtain an aqueous polyurethane dispersion. The aqueous polyurethane dispersions prepared by this method exhibit higher molecular weight and higher tensile strength as compared with those prepared by the conventional method. Particularly, the aqueous polyurethane dispersions prepared by this method with a carboxylic polycaprolactonediol as the source of soft segments exhibit ultra fine particles. |
| priorityDate | 2004-04-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 52.