http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1283066-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1e70c0aeade92d7571d955d3b90ea06e |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D01F6-605 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08K5-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L77-10 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D01F6-60 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K5-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L77-10 |
| filingDate | 1969-06-12^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c03e3ad54575e2995dba63935eea29ff |
| publicationDate | 1972-07-26^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1283066-A |
| titleOfInvention | Optically anisotropic dopes comprising wholly aromatic polyamides |
| abstract | 1283066 Aromatic polyamide anisotropic dopes E I DU PONT DE NEMOURS & CO 12 June 1969 [12 June 1968] 5815/72 Divided out of 1283064 Heading C3R An optically anisotropic dope comprises (I) a carbocyclic wholly aromatic homo- or copolyamide wherein at least 90% of the bonds linking each aromatic nucleus are coaxial or parallel and oppositely extended and having an inherent viscosity (at 0À5 g./100 ml. in H 2 SO 4 at 30‹ C.), (II) a liquid medium comprising at least one of N,N-dimethyl acet-, propion- or butyramide; N,N - dimethylmethoxyacetamide; N,N - diethylacetamide; N - methyl - pyrrolidone, -piperidone or -caprolactam; N-ethylpyrrolidone; N - acetyl - pyrrolidine or -piperidine; N,N<SP>1</SP> - dimethyl - ethylene or -propylene urea; N,N,N<SP>1</SP>,N<SP>1</SP> - tetramethyl urea; and hexamethylphosphoramide and (III) LiCl, CaCl 2 or HCl, the concentration of (I) being above the "Critical Concentration Point" (C.C.P.) at which there is a sharp discontinuity in the viscosity v. concentration curve. The dopes claimed in Specifications 1,198,081, 1,259,788 and 1,262,002 are disclaimed. Component (III) may be formed in situ, e.g. by using Li 2 CO 3 to neutralize HCl formed during polymer preparation. The dope may also contain dyes, fillers, delustrants, U-V stabilizers or antioxidants. Alternative techniques to "C.C.P." for detecting anisotropy are described and general reference is made to the phase diagrams of Specification 1,283,064 as illustrating the effect of various factors on anisotropy. Suitable polymers and preparatory processes therefore are extensively described. Reference is made to Specification 1,283,065 in respect of the use of the dopes to form fibres. Other Specifications referred to are 871,758 to 871,581, 1,198,082 and 1,198,083. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5442003-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/AU-671627-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0011785-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4308374-A |
| priorityDate | 1968-06-12^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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