Invention Grant
- Patent Title: Process for the elimination of residual mercaptans from nitrile rubbers
- Patent Title (中): 从丁腈橡胶中消除残余硫醇的方法
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Application No.: US12540791Application Date: 2009-08-13
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Publication No.: US08367778B2Publication Date: 2013-02-05
- Inventor: Gian Tommaso Viola , Davide De Santi , Romano Lima
- Applicant: Gian Tommaso Viola , Davide De Santi , Romano Lima
- Applicant Address: IT San Donato Milanese
- Assignee: Polimeri Europa S.p.A.
- Current Assignee: Polimeri Europa S.p.A.
- Current Assignee Address: IT San Donato Milanese
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: ITMI2008A1603 20080909
- Main IPC: C08F20/44
- IPC: C08F20/44 ; C08F2/26 ; C08F8/34 ; C08F36/00
Abstract:
Process for the elimination of residual mercaptans from nitrile rubbers, comprising: a. adding a colloidal emulsion of sulfur to a nitrile latex emulsion (NBR rubber latex) containing free mercaptan and with a pH of between 7 and 14, at a temperature ranging from 30 to 120° C.; b. coagulating the nitrile latex c. washing with demineralized water and drying the NBR rubber recovered after coagulation.
Public/Granted literature
- US20100063216A1 PROCESS FOR THE ELIMINATION OF RESIDUAL MERCAPTANS FROM NITRILE RUBBERS Public/Granted day:2010-03-11
Information query
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