http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4941931-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2a6a9431aa1fe5109ca95ad4e332231b |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C06B23-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C06B45-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C06B23-007 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C06B23-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C06B45-10 |
| filingDate | 1983-08-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1990-07-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d47e195b65dc7d5968d5ad7131a4d4e2 |
| publicationDate | 1990-07-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-4941931-A |
| titleOfInvention | Gas-generated expandable beads as burning rate accelerators |
| abstract | Mechanical enhancement of the burning rate of solid propellants is achieved by the incorporation of limited percentages of gas-generated-expandable beads into the solid propellant composition during propellant mixing and which are chemically crosslinked during propellant curing to a solid propellant grain. When the flame front reaches an individual bead during propellant grain burning, the bead which contains a blowing agent selected from 4-toluenesulfonyl hydrazide and 4,4'-oxybis(benzenesulfonyl hydrazide) and coated with a bead forming material consisting of about 95 parts by weight hydroxyl-terminated polybutadiene prepolymer, of about 5 parts by weight of trimethylolpropane, and of about 6 parts by weight of isophorone diisocyanate expands to several times its volume and ruptures. Bead expansion or rupture causes a disruption of the propellant's surface, and the flame can penetrate into the propellant. The penetration results in a major increase in burning rate. An increase in propellant density and an improvement in mechanical properties are achieved as a result of the beads being chemically crosslinked during propellant curing after being first physically dispersed in the propellant composition during propellant mixing. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5368662-A |
| priorityDate | 1983-08-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 63.