Patent GB-717973-A (GB)
Title: Improvements in or relating to organo-tin compounds and halogen containing syntheticresins
IPC: C07F9/06
Filed: 1952-03-18
Abstract: Resinous compositions comprise a polymer of vinyl chloride or vinylidene chloride and an organo-tin compound obtained by heating an organo-tin oxide of the general formula R1 R2 SnO, wherein R, and R2 represent hydrocarbon radicals, and a hydrocarbon ester of a carboxylic acid or an oxygen containing inorganic acid having at least one oxygen atom in the acid radical attached to a replaceable acid hydrogen atom (see Group IV (b)). Polymers mentioned are homopolymers of vinyl chloride and vinylidene chloride, copolymers of these chloroethylenes with each other and with other compounds such as vinyl acetate, vinyl bromide, vinyl chloroacetate, vinyl propionate, vinyl butyrate, vinylidene bromide, vinylidene chlorofluoride, dimethyl maleate, dimethyl fumarate, dibutyl maleate, methyl acrylate, methyl methacrylate, methyl ethacrylate, 2-ethylhexyl acrylate, n-octyl acrylate, isononyl acrylate, decyl acrylate and diethyl chloromaleate, the chloroethylene being preferably present as the predominant material, polymers derived from three or more polymerizable materials such as the tripolymer of vinyl or vinylidene chloride, preferably being present as the predominant material, polymerized with a higher acrylate such as n-octyl acrylate and with a monomer such as acrylonitrile, styrene, vinyl acetate, vinyl benzoate or isobutylene.  Fillers, colouring pigments and plasticizers such as tricresyl phosphate, dibutyl phthalate and dioctyl phthalate may also be present in the compositions.ALSO:The invention comprises the reaction product obtained by heating an organo-tin oxide of the formula R1R2SnO, where R1 and R2 represent monovalent hydrocarbon groups, with a hydrocarbon ester of a carboxylic acid or of an inorganic oxygen-containing acid having at least one oxygen atom in the acid radical attached to a replaceable hydrogen atom.  The groups R1 and R2 may both be alkyl or aryl groups, or one may be an alkyl group and the other an aryl group. Organo-tin oxides referred to are dimethyl, diethyl, dipropyl, dibutyl, diamyl, dioctyl, didecyl, dilauryl, dipropenyl, diphenyl, dinaphthyl, ditolyl, methyl ethyl and phenyl butyl tin oxides. Esters of inorganic acids containing at least one oxygen atom in the acid radical attached to a replaceable hydrogen atom may be derived from phosphorus, phosphoric, silicic, sulphurous, sulphuric, arsenous, arsenic, boric, perchloric, chlorous, periodic, iodous, iodic, chromous, chromic, hypochloric, nitrous, nitric, selenic, selenious, tellurous, telluric, titanic, bromous or bromic acid.  The hydrocarbon ester may be ethyl orthosilicate, triethyl arsenate, n-propyl nitrate, di-n-propyl sulphate, tributyl phosphate, n-octyl nitrate, di-n-dodecyl sulphate, tri-o-cresyl phosphate, tri-p-cresyl phosphate, amyl borate, methyl, ethyl, n-propyl, isopropyl, butyl, phenyl and m-cresyl acetate, methyl, n-butyl, sec.-butyl and ethylene propionate, ethyl, n-propyl, butyl, pentyl, ethylene and 2-propenyl butanoate, dibutyl sebacate, phenyl and ethylene laurate, 2-naphthyl lactate, dimethyl, diethyl, dioctyl, diphenyl and butylene glycol phthalate, diethyl m- and p-phthalate, ethyl, amyl and b -naphthyl benzoate, phenyl salicylate and dimethyl, diethyl, dipropyl, dibutyl, dioctyl, dilauryl, diphenyl, diethylene, di-2-propenyl and monoethyl maleate.  The organo-tin compound may be formed at a temperature from 100 DEG  to 225 DEG  C. Preferably, the organo-tin oxide and ester are reacted in equimolecular proportions although the organo-tin oxide can be used in excess.  In the examples organo-tin compounds are prepared by heating dibutyl tin oxide and diethyl phthalate, phenylbutyl tin oxide and dioctyl phthalate, dibutyl tin oxide and diethyl maleate, dibutyl tin oxide and tri-p-cresyl phosphate, and dibutyl tin oxide and ethyl orthosilicate.  The product obtained from dibutyl tin oxide and dioctyl phthalate is also referred to.