| 摘要 |
<p>Products obtained by reacting polymers or copolymers of conjugated dienes with sulphur dioxide are stabilized with cyanates or thiocyanates, alkali metal or ammonium cyanates or thiocyanates being preferred. Other stabilizers such as hexamethylene tetramine may be incorporated. The conjugated diene may be butadiene, methyl butadiene, dimethyl butadiene or chloroprene, which substances may be copolymerized with each other or with isobutylene, styrene, vinyl chloride, vinyl esters, acrylic acid, methacrylic acid, acrylonitrile or methacrylonitrile. The reaction products to be stabilized may also comprise products obtained by the reaction of the polymers or copolymers and unsaturated compounds of low molecular weight with sulphur dioxide, suitable low molecular weight compounds being butadiene, 1,5-hexadiene, allyl alcohol, chloride, acetate, capronate, isothiocyanate, and oleate, diallyl phthalate and diallyl adipate. The stabilized polymers may be used in the preparation of threads, fibres, fabrics, tapes and films. Specification 666,644, [Group V], is referred to.</p> |
