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    • 22. 发明专利
      DE1494134B2  未知
    • DE1494134B2
    • 1971-10-14
    • DEI0021669
    • 1962-04-25
    • C07D277/70 , C07D277/74 , C08K5/00 , C08K5/45 , C08K5/47 , C08L21/00 , C08L23/02 , C08L27/00 , C09K15/30 , C08K1/56
    • The invention comprises phenols substituted in each of the 2, 4 and 6 positions by substituents of which one is a benzthiazylthioalkyl group of formula: where R and R1 are hydrogen atoms or alkyl groups and the nucleus A may be substituted by a chlorine atom or an alkyl, alkoxy or alkylamino group, the second is another such benzthiazylthioalkyl group or a tertiary alkyl or alkylcycloalkyl group, and the third is an alkyl group having up to 9 carbon atoms, an alkylene group joined to another phenol nucleus bearing a benzthiazylthioalkyl group, (which phenol nucleus is optionally substituted by a chlorine atom), or a cycloalkyl, alkylcycloalkyl, or aralkyl group, and their preparation by reaction of a mercaptobenzthiazole, an aldehyde or ketone and a phenol, in any order, and preferably in the presence of an acidic or basic catalyst. The compounds of the invention are used as anti-oxidants and antiozonants for natural and synthetic rubbers, rubber articles and latices, polymers and mineral oils.ALSO:Antioxidant and antiozonant stabilizers for natural and synthetic rubbers and other polymers comprise phenols substituted in each of the 2, 4 and 6 positions by substituents one of which is a benzthiazylthioalkyl group of formula: where R and R1 are hydrogen atoms or alkyl groups and the nucleus A may be substituted by a chlorine atom or an alkyl, alkoxy, or alkylamino-group, the second is another such benzthiazylthioalkyl group or a tertiary alkyl or alkylcycloalkyl group, and the third is an alkyl group having up to 9 carbon atoms, an alkylene group joined to another phenol nucleus having a benzthiazylthioalkyl substituent, (said phenol being optionally substituted by a chlorine atom), or a cycloalkyl, alkylcycloalkyl or aralkyl group (see Division C2). The substituted phenol is preferably used in proportions of 0.5 to 5.0% of the weight of the rubber or polymer. The substituted phenol may be mixed with rubber or rubber latex along with vulcanising and other ingredients such as anti-oxidants, pigments, fillers, plasticizers and blowing agents and the resulting mixes cured by heat treatment, or the mixture may be vulcanised by treatment with sulphur monochloride in the cold. Antiozonant effect is enhanced by the addition of paraffin or microcrystalline wax. When used for the preservation of polymers such as polyethylene or polypropylene, other antioxidants, e.g. an alkyl thiodipropionate may be added.ALSO:Antioxidant and antiozonant stabilizers for mineral oils, e.g lubricating oils and motor fuels, comprise phenols substituted in each of the 2, 4 and 6 positions by substituents one of which is a benzthiazylthioalkyl group of formula where R and R1 are hydrogen atoms or alkyl groups and the nucleus A may be substituted by a chlorine atom or an alkyl, alkoxy or alkylamino group, the second is another such benzthiazylthioalkyl group or a tertiary alkyl or alkylcycloalkyl group, and the third is an alkyl group having up to 9 carbon atoms, an alkylene group joined to another phenol nucleus having a benzthiazylthioalkyl substituent (said phenol being optionally substituted by a chlorine atom), or a cycloalkyl, alkylcycloalkyl or aralkyl group (see Division C2).
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Espacenet 法律信息 同族专利 专利引用
    • 25. 发明专利
      FR2172279B1  未知
    • FR2172279B1
    • 1976-04-23
    • FR7305349
    • 1973-02-15
    • DU PONT
    • C08L7/00 , C08F36/16 , C08L21/00 , C08L21/02 , C08D1/09 , C08D3/14 , C08D7/02 , C08K1/56
    • 1419135 Xanthogen-modified chloroprene polymers E I DU PONT DE NEMOURS & CO 16 Feb 1973 [18 Feb 1972] 7797/73 Heading C3P Xanthogen-modified chloroprene polymers are produced by polymerization by conventional aqueous emulsion techniques in the presence of a dialkyl xanthogen disulphide, and adding to the polymer latex at a time when the desired degree of polymerization has been reached at least 0À1 wt. per cent (based on monomer) of a compound of formula wherein R is hydrocarbyl, 2-thiazolyl optionally substituted by one or two hydrocarbon radicals, 2-benzothiazolyl or and R 1 , R 2 , R 3 and R 4 are each alkyl, cycloalkyl or aralkyl radicals any of which may contain substituents which do not detrimentally affect the polymer, or R 1 and R 2 or R 3 and R 4 together with the nitrogen atom to which they are attached can form a saturated ring. The preferred compound is 2-(morpholinothio)benzothiazole. In Example 1, polychloroprene and chloroprene/dichlorobutadiene copolymer are produced, and 2-(morpholinothio)benzothiazole added after short-stopping but before removal of excess monomer. In Example 2, sol. polychloroprene and gel polychloroprene (containing 3% ethylene glycol dimethacrylate co-monomer) are separately prepared, the short-stop added to the sol. polychloroprene including 2- (morpholinothio)benzothiazole, and the two latices are then mixed prior to removal of unreacted monomer. The products have an improved odour when vulcanized as compared with conventional products. The process of Specification 1,414,393 is disclaimed.
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Espacenet 法律信息 同族专利 专利引用
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