Die Telomerisation wird in wäßriger Phase so durchgeführt, daß man praktisch wasserunlösliche Telogene durch Zusatz von solchen Mengen an oberflächenaktiven Verbindungen, die eine hydrotrope Wirkung entfalten, solubilisiert und anschließend telomerisiert. Das Verfahren läßt sich mit wasserlöslichen Acrylverbindungen durchführen. Telogene sind 1 bis 4 Mercaptogruppen sowie 1 bis 2 Hydroxylgruppen/Mol enthaltende Verbindungen mit 3 bis 30 Kohlenstoffatomen. Als oberflächenaktive Verbindungen sind ethoxylierte nichtionische Tenside bevorzugt, weiter sulfatierte Addukte von 2 bis 40 Mol Ethylenoxid an primäre oder sekundäre Fettalkohole oder Alkyl (C6 bis C9)-phenole beziehungsweise deren wasserlösliche Salze, ferner quaternäre Alkylammoniumverbindungen. Die Reaktionsprodukte können direkt als Dispergiermittel in wäßrigen Phasen verwendet werden.
Process for producing polythiobisphenols and process for producing mercaptophenols by the hydrogenolysis of the same
申请人:SUMITOMO SEIKA CHEMICALS CO., LTD.
公开号:EP0200212A2
公开(公告)日:1986-11-05
A process for producing polythiobisphenols which comprises: reacting a phenol having the general formula
or
wherein each R independently represents a hydrogen, a halogen or an alkyl, with sulfur monochloride in a polar organic solvent in the presence of a nitrogen-containing organic compound as a catalyst which is selected from the group consisting of tertiary amines, quaternary ammonium, alkylated acid amides and heteroaromatic compounds, in amounts of about 1-30 % by weight based on the amount of the phenol used. As a catalyst, bromine or an alkali metal halide is also usable.
A novel process for producing mercaptophenols by the hydrogenolysis of polythiobisphenols in the presence of a nickel catalyst is also disclosed. Raney nickel catalyst which is in advance poisoned with an organosulfur compound in which the sulfur atom has unshared electron pairs is especially effective as a catalyst.
一种生产聚硫双酚的工艺,包括: 使通式为
或
其中每个 R 独立地代表氢、卤素或烷基,在极性有机溶剂中与一氯化硫反应,催化剂为含氮有机化合物,选自叔胺、季铵、烷基化酸酰胺和杂芳烃化合物组成的组,用量约为苯酚用量的 1-30%(重量百分比)。溴或碱金属卤化物也可用作催化剂。
此外,还公开了一种在镍催化剂存在下通过氢解多硫二酚生产巯基苯酚的新工艺。雷尼镍催化剂是一种特别有效的催化剂,这种催化剂事先用有机硫化合物毒化,其中的硫原子具有未共享的电子对。
Polyvinyl ester macromonomer and its uses
申请人:KURARAY CO., LTD.
公开号:EP0421296A2
公开(公告)日:1991-04-10
Provided are polyvinyl ester macromonomers (A) having excellent polymerizability and highly controlled composition, structure and distribution of polymerization degree.
Also provided are polyvinyl alcohol macromonomers (B) obtained by solvolysis of the above polyvinyl ester macromonomers (A) and having excellent polymerizability and highly controlled composition, structure and distribution of polymerization degree.
Further provided are polymers (C) obtained by polymerization of the above polyvinyl ester macromonomers (A) and containing units from polyvinyl ester macromonomers having highly controlled composition, structure and distribution of polymerization degree. These polymers (C) are useful as compatibility improving agents, surface improving agents and like agents.
Still further provided are polymers (D) obtained by solvolysis of the above polymers (C) or by polymerization or copolymerization of the above polyvinyl alcohol macromonomers (B) and containing units from polyvinyl alcohol macromonomers having highly controlled composition, structure and distribution of polymerization degree. These polymers (D) are useful for decreasing viscosity of aqueous solutions of polymers at high concentrations, improving surface, preventing static charge and the like.
The present invention relates to a process for preparing hydroxylated rubber by reacting (a) a rubber having from about 5 to about 75 percent of a 1,2-double bond content with (b) a mercaptan of the formula:
wherein n is an integer of from 3 to 19; and wherein the reaction is conducted in the solid state and is catalyzed by a free radical catalyst.
本发明涉及一种制备羟基化橡胶的工艺,该工艺是将(a)1,2-双键含量为 5%至 75%的橡胶与(b)式硫醇反应:
其中 n 为 3 至 19 的整数;反应在固态下进行,并由自由基催化剂催化。
Process for producing mercaptophenols by the hydrogenolysis of polythiobisphenols
申请人:SUMITOMO SEIKA CHEMICALS CO., LTD.
公开号:EP0474259A2
公开(公告)日:1992-03-11
A novel process for producing mercaptophenols by the hydrogenolysis of polythiobisphenols in the presence of a nickel catalyst is disclosed. Raney nickel catalyst which is in advance poisoned with an organosulfur compound in which the sulfur atom has unshared electron pairs is especially effective as a catalyst.
A process for producing polythiobisphenols which comprises: reacting a phenol having the general formula
wherein each R independently represents a hydrogen, a halogen or an alkyl, with sulfur monochloride in a polar organic solvent in the presence of a nitrogen-containing organic compound as a catalyst which is selected from the group consisting of tertiary amines, quaternary ammoniums, alkylated acid amides and heteroaromatic compounds, in amounts of about 1-30 % by weight based on the amount of the phenol used. As a catalyst, bromine or an alkali metal halide is also usable.
本发明公开了一种在镍催化剂存在下通过氢解多硫二酚生产巯基苯酚的新工艺。事先用硫原子具有未共享电子对的有机硫化合物毒化的雷尼镍催化剂作为催化剂特别有效。
一种生产聚硫双酚的工艺包括:使通式为
其中每个 R 独立地代表氢、卤素或烷基,与一氯化硫在极性有机溶剂中,在含氮有机 化合物存在下作为催化剂进行反应,该有机化合物选自由叔胺、季铵、烷基化酸酰胺和杂 芳化合物组成的组,其用量为苯酚用量的约 1-30%(重量百分比)。溴或碱金属卤化物也可用作催化剂。