http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-993122-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5d9f3ca41550d315642580237250c5b0 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S526-909 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-60 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-199 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G63-80 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-199 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-60 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G63-80 |
| filingDate | 1961-05-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_49dbd60172e00b9bee6c469917822388 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1ad968ed50554b2d85e9d908a07fae41 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a9b46325522f50f93c5b4fcb4b12798d |
| publicationDate | 1965-05-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-993122-A |
| titleOfInvention | Linear block-type copolyesters |
| abstract | A process for the solid phase polymerization of initial prepolymer copolyester particles having sizes substantially passing a 20 U.S. mesh screen with less than 25% passing a 200 mesh screen and having an inherent viscosity not exceeding 0.5, comprises (I) heating the particles at 170 DEG to 300 DEG C. for at least 1 1/2 hours to produce a product having an inherent viscosity not more than 0.1 units higher than the initial prepolymer, and (II) heating this product at a temperature of at least 20 DEG C. below the melting-point of the final product until a copolyester is produced having a melting point at least 10 DEG C. higher than the same copolyester produced by a single-stage process. The process is stated to produce block-type copolyesters. The copolyester is that of (a) at least one glycol at least 75 mole per cent of which is the cis- or trans-isomer of 1: 4-cyclohexanedimethanol, (b) at least one dibasic acid of which at least 60 mole per cent is a dicarboxylic acid in which each carboxyl group is attached to a single carboxylic nucleus or different carbocyclic nuclei. The modifying glycol may be ethylene glycol, 1: 5-pentandiol, 1: 10-decanediol, diethylene glycol, triethylene glycol, 2: 2-dimethyl - 1: 3 - propanediol, 2 - methyl - 1: 5 - pentanediol or 1: 4-di(hydroxyethyl)benzene. The carboxylic dicarboxylic acid may be terephthalic, trans-hexahydroterephthalic, p: p1-sulphonyldibenzoic, 4: 41-diphenic, 4: 41-benzophenonedicarboxylic or 1: 4- or 1: 5-naphthalene dicarboxylic acids, or may be 1: 2-di(p-carboxyphenyl)ethane, 1: 2-di(p-carboxyphenoxy)-ethane or 4: 41-dicarboxydiphenyl ether. Up to 40 mole per cent of these acids may be replaced by carbonic, oxalic, succinic, adipic, sebacic, azelaic, alpha, ethylsuberic, alpha, alpha-diethyladipic, dimethylmalonic, orthophthalic, itaphthalic or hexahydro-orthophthalic acids or by dicarboxyl diethyl ether. The polyesters may also be modified by hydroxypivalic, hydroxybutyric or hydroxycaproic acid. Both stages of the solid phase polymerization may be effected in a horizontal or vertical polymerization zone and in a vacuum or a current of an inert gas. The particles may be stirred or a fluidized technique may be used. Examples describe the solid phase polymerization of polyesters of: (1)-(11) and (15) terephthalic acid, succinic acid or glutaric acid or sebacic acid or azelaic acid, and a mixture of trans- and cis-cyclohexane -1: 4-dimethanol; (12) terephthalic acid, glutaric acid, succinic acid, and a mixture of trans- and cis-cyclohexane-1: 4-dimethanol; (13) terephthalic acid, and a mixture of trans- and cis-cyclohexane-1: 4-dimethanol. Uses.-Fibres and films. Specifications 818,157 and 993,121 are referred to. |
| priorityDate | 1959-03-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 47.