An ethylene-alkyl acrylate copolymer rubber composition, which comprises 100 parts by weight of ethylene-alkyl acrylate copolymer rubber having an amine vulcanizable group, 0-60 parts by weight of EPDM, 5-40 parts by weight of a plsticizer, 0.5-4 parts by weight of an organic peroxide cross-linking agent, 0.5-4 parts by weight of an amine-based cross-linking agent, and preferably 0.1-0.5 parts by weight of a sulfur compound. Oil extended EPDM can be used in place of EPDM or EPDM and the plasticizer. Use of 1-30 parts by weight of α-olefin oligomer together with 5-50 parts by weight of EPDM can improve the processability (non-adhesion of product itself to a mold or prevention of bleed occurrence).
US7435778B2
申请人:——
公开号:US7435778B2
公开(公告)日:2008-10-14
Dipolar cyclization reactions in heterocyclic synthesis: a novel route to furanophanes
作者:Wolfgang Eberbach、Norbert Laber
DOI:10.1016/s0040-4039(00)77672-6
日期:1992.1
The multistep transformation of 2,3-bridged butenynyl oxiranes 8 into furanophanes 12 involving bridgehead olefins 11 as key intermediates is described. The two lower members of 12 undergo rapid air oxidation resulting in the formation of the dienediones 14a,b. 14b is converted by base into the bicyclo[6.3.0]undecadienone 15.