http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-718921-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_416a5ce204339d89f1973a13c4f6ab55 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01B3-42 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01B3-42 |
| filingDate | 1952-05-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1954-11-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-718921-A |
| titleOfInvention | Improvements in or relating to coated magnet wire |
| abstract | A composition for coating magnet wire comprises a solution of a resin prepared by reacting (1) glycerine or pentaerythritol by heating with (2) terephthalic, isophthalic, a diphenic, a tolane dicarboxylic or a dibenzyl dicarboxylic acid, the structure of the monocyclic aryl acids being such that the carboxyl groups are not ortho to each other, (1) and (2) being employed in amounts such that the ratio of OH to COOH radicals is from 4:1 to 1.001 to 1, removing the water formed by the reaction, and reacting the reacting mass with (3) a silane or siloxane of the average general formula <FORM:0718921/IV (a)/1> where each R is an alkyl, monocyclic aryl, alkoxy or aryloxy radical m has a value from 0 to 3, n has a value from 0.05 to 4, the sum of m + n being not greater than 4, and X is alkoxy, aryloxy, hydroxy, chlorine or bromine, the silane or siloxane being present in amount of 0.1 to 85 per cent. by weight of the total reactants and the reaction being effected in the present, as solvent, of an ester of a fatty acid, a diether, diester or ester-ether of ethylene- or polyethylene-glycol, a tertiary amine, a ketone, a dialkyl substituted amide, or a cresol, the solvent having a boiling point above 190 DEG C. and being present in amount sufficient to prevent gelation of the resin. The resin may be modified by incorporating in the reaction mixture of (1) and (2) an aliphatic dicarboxylic acid or anhydride thereof, e.g. adipic, succinic, sebacic, fumaric or azelaic acid or anhydride, and in amount e.g. of 0.1 to 35 per cent. by weight of (1) and (2). Specified solvents are: quinoline, isoquinoline, tributylamine, tri-isobutylamine, triamylamine, isophorone, acetophenone, acetonylacetone, dimethylformamide, diethylformamide, dimethylacetamide, 2-ethylhexyl acetate, lauryl acetate, 2-ethyl-hexyl butyrate, butyl carbitol acetate, butyl cellosolve acetate, amyl carbitol acetate, diethylene glycol dipropionate, phenoxyethylene glycol acetate, diethyl carbitol and cresol. Lower boiling solvents, e.g., toluene and xylene may also be present in the preparation of the resin and/or in the coating solution. Air drying varnishes may be made by spray drying the resins and redissolving in volatile solvents such as acetone, butyl acetate and other low boiling ketones, esters and tertiary amines. The organosilicon compounds include silanes, partially hydrolyzed silanes (i.e. siloxanes still containing hydrolysable substituents of the original silanes), partially condensed siloxanes (i.e. siloxanes containing free OH groups), siloxanes and co-polymers thereof. Examples are given. Specification 715,231 is referred to. |
| priorityDate | 1951-05-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 90.