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    3.
    发明专利
    未知

    公开(公告)号：DE1223156B

    公开(公告)日：1966-08-18

    申请号：DEF0034033

    申请日：1961-05-27

    Applicant: HOECHST AG

    Inventor： ORTHNER DR LUDWIG ,  HORST DR KARL ,  WELLENS DR HEINO

    IPC: C08G8/28 ,  C08G59/14 ,  C08G59/40 ,  C08G63/91 ,  C08G75/14 ,  C08G75/16

    Abstract: Water-insoluble condensation products containing polysulphide bridges are prepared by reacting (a) a product prepared by reacting a novolac with epihalohydrin, a halogen carboxylic acid or formaldehyde and hydrogen halide with (b) a water-soluble inorganic thiosulphate to form a thiosulphate which is then treated with an alkaline condensing agent, if desired together with a reducing agent, e.g. an alkali metal sulphite or dithionate. In a modification, intermediate (a) is the hydroxyl-free condensate of formaldehyde with an aromatic hydrocarbon (e.g. xylene or naphthalene) into which CH2X groups have been introduced by reaction with formaldehyde and hydrogen halide (HX). Intermediates (a) contain 3-25 groups reacting with thiosulphate, e.g. -OCH2X, OCH2CH(OH)CH2X, OC(O)(CH2)nX, wherein X is a halogen atom and n an integer from 1 to 4. Preferably alkali metal or ammonium thiosulphate is used. Reaction between (a) and (b) may be in water, a water-miscible organic solvent or a mixture of solvents. In examples:-(1) A novolac from phenol, p-cresol, p-hexylphenol and formaldehyde was reacted with epichlorhydrin, and the product, dissolved in methanol, was reacted with aqueous sodium thiosulphate, and heating with caustic soda and then with aqueous sodium carbonate yielded a hard, insoluble, transparent plastic. (2) A novolac from p-cresol, 4,41-dihydroxydiphenyldimethyl methane, p-hexyl-phenol and formaldehyde was reacted with epihalohydrins and the product with sodium thiosulphate. Heating the product with sodium carbonate or caustic soda yielded a hard, insoluble plastic. (3) A novolac from phenol, p-octadecyl-phenol and formaldehyde was reacted with epichlorhydrin and then with ammonium thiosulphate. The product heated with sodium sulphide yielded a plastic kneadable mass. (4) A novolac from p-tert.-butylphenol, 2-naphthol and formaldehyde was reacted with epihalohydrins and thiosulphate, and converted to the product containing polysulphide bridges by boiling with morpholine. (5) A novolac was esterified with chloracetic acid and reacted with sodium thiosulphate. The "Bunto" polysalt was then treated with sodium sulphide solution. (6) A novolac was treated with paraformaldehyde and hydrogen chloride and the resulting oily resin treated with sodium thiosulphate. The product treated with potassium hydrogen sulphide gave a hard, insoluble, synthetic resin. Specification 666,557 is referred to.

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