Patent GB-572707-A (GB)
Title: Process for the stabilization of organic halogen compounds of high molecular weight
IPC: C08K5/06
Filed: 1941-08-27
Abstract: A process of stabilizing high molecular weight organic halogen compounds to heat and/or light comprises incorporating therewith a small proportion, not exceeding 5 per cent by weight, of at least one carbinol, ester or ether containing the group <FORM:0572707/IV/1> in which R1, R2, R3 are the same or different aromatic groups or heterocyclic groups which contain a 5- or 6-membered ring having respectively 2 or 3 conjugated double bonds.  The high molecular weight organic halogen compounds are aromatic aliphatic and cycloaliphatic compounds containing in the molecule atoms of one or more halogens and more than 8 carbon atoms, e.g. materials made by halogenation or hydrohalogenation of aliphatic and aromatic compounds containing more than 8 carbon atoms, polymers of polymerizable unsaturated organic halogen compounds and interpolymers thereof with other substances and the halogenated products of such polymers, halogenated paraffins, halogenated polythene, chlorinated polyisobutylene, and halogen derivatives and hydrohalides of derivatives of naphthalene, rubber, waxes and high fatty acids, i.e. naphthenic acids. Specified stabilizing agents are triphenyl carbinol and its derivatives such as esters, ethers and substitution products, e.g. triphenyl methyl ethyl ether, triphenyl methyl phenyl ether, tritolyl methyl acetic ester, triamino triphenyl methyl ethyl ether and their derivatives and substitution products; also trifuryl, trinaphthyl and trixenyl carbinols and their derivatives; and substances in which R1 and R2 are phenyl groups and R3 is a carbazole group.  These substances may be used with other stabilizers, phenyl salicylate is mentioned.  The incorporation may be done by grinding, mixing at a temperature above the softening point of the halogenic compound and by dissolving the stabilizers in a solution of the halogen compounds.  In examples, triphenyl methyl ethyl ether was used to stabilize (1) chlorinated polythene; (2) polyvinyl chloride; and (3) chlorinated paraffin wax.  In (4) rubber hydrochloride was stabilized with diphenyl carbazolyl methyl butyl ether and in (5) chlorinated polythene was mixed with triphenyl methyl acetate and phenyl salicylate.  Specifications 372,327 and 538,871 are referred to.ALSO:A process of stabilizing high molecular weight organic halogen compounds to heat and/or light comprises incorporating therewith a small proportion, not exceeding 5 per cent by weight, of at least one carbinol, ester or ether containing the group <FORM:0572707/V/1> in which R1, R2, R3 are the same or different aromatic groups or heterocyclic groups which contain a 5- or 6-membered ring having respectively 2 or 3 conjugated double bonds. The high molecular weight organic halogen compounds are aromatic aliphatic and cycloaliphatic compounds containing in the molecule atoms of one or more halogens and more than 8 carbon atoms, e.g. materials made by halogenation or hydrohalogenation of aliphatic and aromatic compounds containing more than 8 carbon atoms, polymers of polymerizable unsaturated organic halogen compounds and interpolymers thereof with other substances and the halogenated products of such polymers, and halogen derivatives and hydrohalides of derivatives of rubber.  Specified stabilizing agents are triphenyl carbinol and its derivatives such as esters, ethers and substitution products, e.g. triphenyl methyl ethyl ether, triphenyl methyl phenyl ether, tritolyl methyl acetic ester, triamino triphenyl methyl ethyl ether and their derivatives and substitution products; also trifuryl, trinaphthyl and trixenyl carbinols and their derivatives; and substances in which R1 and R2 are phenyl groups and R3 is a carbazole group. These substances may be used with other stabilizers, phenyl salicylate is mentioned.  The incorporation may be done by grinding, mixing at a temperature above the softening point of the halogenic compound and by dissolving the stabilizers in a solution of the halogen compounds. In an example, rubber hydrochloride was stabilized with diphenyl carbazolyl methyl butyl ether. Specifications 372,327 and 538,871, [Group IV], are referred to.