Patent GB-666644-A (GB)
Title: A process for the application of substances, particularly colouring matters and stabilisers, in or on reaction products of high molecular weight
IPC: D06P1/92
Filed: 1948-09-10
Abstract: The reaction products of sulphur dioxide with polymers and copolymers of conjugated dienes having a molecular weight greater than 5000 are treated with colouring matters or textile assistants while the reaction products are in the swollen state.  The textile assistants are defined as stabilizers, or compounds which improve moisture absorption, render the product water-repellent, reduce combustibility, or affect the gloss or the handle of the reaction product.  The polymerized substances may be polymers of butadiene p and pentadiene, methyl butadiene, dimethyl butadiene, and chloro-prene, and copolymers of these substances with isobutylene, styrene, vinyl chloride, vinyl esters, acrylic acid, methacrylic acid, acrylonitrile, or methacrylonitrile.  The polymerized substances may be reacted with sulphur dioxide in the presence of a low molecular weight unsaturated compound such as butadiene, 1,5-hexadiene, allyl alcohol, allyl chloride, allyl acetate, allyl capronate, allyl isothiocyanate, allyl oleate, o-diallyl phthalate or diallyl adipate.  Swelling is preferably effected by reacting the sulphur dioxide and polymerized material in solvents such as ethanol and a mixture of benzene and toluene respectively, alternatively, after reaction, swelling may be effected to a lesser extent with the aid of dichloroethane or chloroform, or by sulphuric acid, phosphoric acid or a solution of caustic soda. Specification 666,640, [Group V], is referred to.ALSO:The reaction products of sulphur dioxide with polymers and copolymers of conjugated dienes having a molecular weight greater than 5000 are treated with colouring matters or textile assistants while the reaction products are in the swollen state.  The textile assistants are defined as stabilizers, or compounds which improve moisture absorption, render the product water-repellent, reduce combustibility, or affect the gloss or the handle of the reaction product.  The polymerized substances may be natural rubber, polymers of butadiene and pentadiene, methyl butadiene, dimethyl butadiene, and chloroprene, and copolymers of these substances with isobutylene, styrene, vinyl chloride, vinyl esters, acrylic acid, methacrylic acid, acrylonitrile, or methacrylonitrile.  The polymerized substances may be reacted with sulphur dioxide in the presence of a low molecular weight unsaturated compound such as butadiene, 1,5-hexadiene, allyl alcohol, allyl chloride, allyl acetate, allyl capronate, allyl isothiocyanate, allyl oleate, O-diallyl phthalate or diallyl adipate.  Swelling is preferably effected by reacting the sulphur dioxide and polymerized material in solvents such as ethanol and a mixture of benzene and toluene respectively, alternatively after reaction swelling may be effected to a lesser extent with the aid of dichloroethane or chloroform, or by sulphuric acid, phosphoric acid or a solution of caustic soda.  In examples a swollen thread was produced by spinning by extrusion at -5 DEG  C., the reaction product of a solution of rubber and tetraline peroxide in benzene and toluene, and sulphur dioxide in alcohol, and this thread was then soaked in a bath containing either "Supraminrot B" or "Noir acetoquinone N.BN" or Congo Red in water, or "Oil Orange N" in benzene, or in N, N1 diphenyl thiourea in ethanol.  Specification 666,640, [Group V], is referred to.