The invention describes a process for stabilizing an organic material against oxidative, thermal or light-induced degradation, which comprises incorporating therein or applying thereto at least a compound of the formula (I) wherein the general symbols are as defined in claim
1
. The compounds of the formula I are especially useful as processing stabilizers for synthetic polymers.
Synthesis and reactivity of compounds with cyclobutane ring(s). 19. Intramolecular thermal cyclization reactions of N,N-diacryloylamines
作者:Alex Alder、Daniel Bellus
DOI:10.1021/ja00360a028
日期:1983.10
Les reactions sont realisees dans le dichloro-1,3 benzene. L'orientation depend beaucoup des substituants portes par la double liaison acrylique. Pour la premiere fois on observe un mode tete-tete pour la cycloaddition thermique [2+2] de 2 unites acryliques
Les 反应 sont 意识到 dans le dichloro-1,3 苯。L'orientation 取决于 beaucoup des substituants portes par la double liaison acrylique。Pour la Premiere fois on observe un mode tete-tete pour la cycloaddition thermique [2+2] de 2 unites acryliques
Development of <i>C</i><sub>2</sub>-Symmetric Chiral Diphosphine Ligands for Highly Enantioselective Hydrogenation Assisted by Ion Pairing
A new series of C2-symmetrical chiral ferrocene-based diphosphino-ethane ligands termed as f-DPE were developed. Assisted by the ion pairing interaction with the ligand, a wide scope of 2-substituted acrylic acids was hydrogenated to obtain chiral propanoic acids with high yields and enantioselectivities. The well-known anti-inflammatory drugs ibuprofen, naproxen, and flurbiprofen could be synthesized
An ionomer resin having a weight-average molecular weight of at least 5,000 and containing three specific repeating units as the primary components, said units being arranged randomly and linearly with the total proportion of the two units being 0.001 to 45 mol%, is obtained by copolymerizing ethylene with an unsaturated carboxylic acid in the presence of a Lewis acid, using as a catalyst a chromium compound and a compound of a metal of Groups I to V in the periodic table and permitting a compound of a metal of Group I, II, III, IVA or VIII in the periodic table to react with the resulting copolymer. When an unsaturated carboxylic ester is used, the resulting copolymer is hydrolyzed or thermally decomposed.
一种离子聚合物树脂,其重量平均分子量至少为 5000,含有三个特定的重复单元作为主要成分,所述单元随机线性排列,两个单元的总比例为 0.001 至 45 摩尔%的乙烯与不饱和羧酸在路易斯酸存在下共聚,使用铬化合物和元素周期表第 I 至 V 族金属化合物作为催化剂,并允许元素周期表第 I、II、III、IVA 或 VIII 族金属化合物与所得共聚物反应。当使用不饱和羧酸酯时,所得共聚物会水解或热分解。
Process for production of stretched moldings
申请人:IDEMITSU KOSAN COMPANY LIMITED
公开号:EP0356692A2
公开(公告)日:1990-03-07
The present invention relates to a process for producing a stretched molding which comprises stretching a straight chain random copolymer having:
a repeating unit (A) represented by the formula:
CH₂-CH₂
and a repeating unit (B) represented by the formula:
the proportion of said repeating unit (B) being 0.01 to 10 mol%; and
an intrinsic viscosity [η] as measured at 135°C in decalin of at least 5 dℓ/g.
A stretched molding obtained by the present invention has mechanical properties equivalent or superior to those of the conventional super high molecular weight polyethylene stretched molding and is excellent in adhesive properties, dyeability, printability and so on, and thus is greatly useful as an industrial material required to have high strength and further good adhesive properties and printability.