Rubber vulcanizates having improved ageing properties
申请人:——
公开号:US20010031836A1
公开(公告)日:2001-10-18
The invention relates to a vulcanizable rubber composition comprising a rubber, sulfur or a sulfur donor, a vulcanization accelerator, a protective agent and 0.1 phr or more of an N,N′-disubstituted p-phenylenediamine protective agent is present in the form of a salt with an acid, and the composition does not comprise an elastomeric copolymer having glycidyl groups. The invention also relates to a vulcanization process comprising mixing and heating said rubber composition and to an article of manufacture comprising the rubber vulcanizate obtained by said process. Preferably, the acid is a C
1
-C
24
monocarboxylic acid or a C
2
-C
24
dicarboxylic acid, more preferably a C
12
-C
20
fatty acid such as stearic acid. Most preferably, the protective agent is 6PPD.
本发明涉及一种可硫化橡胶组合物,该组合物包含橡胶、硫磺或硫磺供体、硫化促进剂、保护剂和 0.1 phr 或更多的 N,N′-二取代对苯二胺保护剂,保护剂以酸盐形式存在,且该组合物不包含具有缩水甘油基团的弹性共聚物。本发明还涉及一种硫化工艺,包括混合和加热所述橡胶组合物,并涉及一种由通过所述工艺获得的橡胶硫化胶组成的制造品。酸最好是 C
1
-C
24
单羧酸或 C
2
-C
24
二羧酸,更优选 C
12
-C
20
脂肪酸,如硬脂酸。最优选的保护剂是 6PPD。
RUBBER VULCANIZATES HAVING IMPROVED AGEING PROPERTIES
申请人:Flexsys B.V.
公开号:EP1263861A1
公开(公告)日:2002-12-11
US6444759B2
申请人:——
公开号:US6444759B2
公开(公告)日:2002-09-03
[EN] RUBBER VULCANIZATES HAVING IMPROVED AGEING PROPERTIES<br/>[FR] VULCANISATS A BASE DE CAOUTCHOUC POSSEDANT DES PROPRIETES DE VIEILLISSEMENT AMELIOREES
申请人:FLEXSYS BV
公开号:WO2001068761A1
公开(公告)日:2001-09-20
The invention relates to a vulcanizable rubber composition comprising a rubber, sulfur or a sulfur donor, a vulcanization accelerator, and a protective agent and is characterized in that 0.1 phr or more of an N,N'-disubstituted p-phenylenediamine protective agent is present in the form of a salt with an acid, and the composition does not comprise an elastomeric copolymer having glycidyl groups. The invention also relates to a vulcanization process comprising mixing and heating said rubber composition and to an article of manufacture comprising the rubber vulcanizate obtained by said process. Preferably, the acid is a C1-C24 monocarboxylic acid or a C2-C24 dicarboxylic acid, more preferably a C12-C20 fatty acid such as stearic acid. Most preferably, the protective agent is 6PPD.
Electrochemical Conversion of Phthaldianilides to Phthalazin-1,4-diones by Dehydrogenative N−N Bond Formation
作者:Anton Kehl、Tile Gieshoff、Dieter Schollmeyer、Siegfried R. Waldvogel
DOI:10.1002/chem.201705578
日期:2018.1.12
The electrochemical synthesis of 6‐membered rings via anodic dianilide N−N coupling is challenging due to concurring benzoxazole co‐formation. The rigidity of the a phthalic acid backbone allows a novel access to phthalazin‐1,4‐diones by N−Nbondformation using anodically generated amidyl radicals. Since conventional synthetic routes to phthalazin‐1,4‐diones require the use of toxic N,N′‐diarylhydrazines