http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102850243-B
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6875d7e2aadcd89466367124232eed2f |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C281-20 |
| filingDate | 2012-09-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2013-12-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_202366d8987c9568cfa45e411fa06772 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_428f389a1194a29d73bf035938909a70 |
| publicationDate | 2013-12-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-102850243-B |
| titleOfInvention | Preparation method of ADC (azodicarbonamide) foaming agent with uniform grain diameter |
| abstract | The invention provides a preparation method of ADC (azodicarbonamide) foaming agent with uniform grain diameter, which comprises the following steps: (1) preparing superfine ADC foaming agent powder with the average grain diameter of 3-6 microns; (2) adding biurea into water to prepare suspension containing 8-32wt% of biurea, adding inorganic acid to control the acidity to be 2-8N, adding potassium bromide or sodium bromide catalyst, controlling the concentration of the catalyst to be 1-5g/l, stirring and heating up to 20-65 degrees centigrade, and then adding the superfine ADC foaming agent powder which is 5-100% of the mass of biurea to serve as seed crystals; (3) adding an oxidant to carry out oxidization reaction to prepare the ADC foaming agent with uniform grain diameter, wherein the reaction temperature is 20-65 degrees centigrade. The preparation method provided by the invention has advantages as follows: the ADC foaming agent with uniform grain diameter can be directly prepared in a process of oxidizing biurea to prepare the ADC foaming agent; the foaming agent is capable of effectively avoiding a difficult foaming process caused by over wide grain diameter distribution of the foaming agent, and is particularly suitable for the foaming production having a higher requirement on the granularity distribution of the foaming agent, such as process for continuously foaming crosslinked polyethylene foaming sheets (XPE and IXPE). |
| priorityDate | 2012-09-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 33.