| 摘要 |
Chlorinated poly-(sulphonazides) of formula R(Cl)x(SO3N3)y where R is an aliphatic or cycloaliphatic radical containing at least 5 carbon atoms, e.g. polyethylene, polypropylene, polyisobutylene, and copolymers of ethylene and propylene, and X is an integer of at least one, and y an integer of at least two, are prepared by chlorinating and sulphochlorinating the hydrocarbon or mixtures thereof, and reacting the product with an alkali metal azide. The compounds are suitable as cross-linking agents for polypropylene, particularly during foam preparation, and as flame-proofing agents. Examples describe the use of the compounds prepared from hydrocarbon mixtures and mineral oil, as cross-linking agents for polyethylene and polypropylene, and the preparation of compounds using a copolymer of ethylene and propylene as the hydrocarbon to be treated. An example describes the preparation of a stereo-regular polypropylene foam using azo bis-(formamide) as blowing agent, with a chlorinated poly-(sulphonazide) prepared from a commercial mixture of hydrocarbons (11-12C) as cross-linking agent.ALSO:The invention comprises chlorinated poly-(sulphonazides) of formula R(Cl)x(SO2N3)y where R is an aliphatic or cycloaliphatic radical containing at least 5 carbon atoms and x is an integer of at least 1, and y an integer of at least 2, prepared by chlorinating and sulphochlorinating an aliphatic or cycloaliphatic hydrocarbon or a mixture thereof to at least one chlorine and two sulphochloro groups per molecule of hydrocarbon, and reacting the product with an alkali metal azide to convert the sulphochloro groups to sulphonazide groups. Examples are dichlorodecane bis-(sulphonylazide, heptachlorooctadecane tris-(sulphonyl azide), chlorocyclohexane bis-(sulphonylazide) and other straight chain and alicyclic hydrocarbons to be treated are mentioned. The chlorine and the sulphur dioxide are passed into liquid hydrocarbons (a solution or molten in the case of solid hydrocarbons) in the presence of ultra-violet light. The compounds are suitable as cross-linking agents for polyolefines, particularly during the preparation of foams, and also as flame-proofing agents. |
