从乙烯基碳酸乙烯酯和双磺酰甲烷开始,已经完成了一种用于合成高度官能化的环戊烯醇的有效的一锅法。该协议通过顺序钯催化脱羧烯丙基化和氧化环化以操作简单的方式进行。广泛的底物可以很好地适应各种环戊烯醇,以中等至良好的产率和优异的选择性。进一步的对照实验表明,可分离的 ( Z )-烯丙醇(高达Z / E = >19:1)的选择性形成是后续级联氧化环化成功的基础。
A diazodisulfone of the formula: ##STR1## wherein R.sup.1 is a C.sub.3-8 branched or cyclic alkyl group, and R.sup.2 is a C.sub.1-8 straight-chain, branched or cyclic alkyl group, is effective as a photoacid generator when used in a photoresist material for light of 300 nm or less.
A positive photoresist composition comprising the components of: (a) a resin which decomposes by the action of an acid, thereby having an increased solubility in an alkali developer; and (b) a compound which is represented by the formula (1) and generates an acid by exposure to active rays or radiation, and a compound which is represented by the formula (2) and generates an acid by exposure to active rays or radiation.
The present invention has its object to provide a crosslinkable silyl group-terminated vinyl polymer-containing curable composition which secures a sufficiently long pot life and, at the same time, can be cured rapidly on the occasion of need and can give cured products excellent in thermal stability, oil resistance, weathering resistance, mechanical properties and adhesiveness, among others.
The present invention provides a curable composition containing (I) and (II) mentioned in the following: a vinyl polymer (I) having, on an average, at least one crosslinkable silyl group at its termini, and a photo acid generator (II).
The vinyl polymer (I) according to the present invention is preferably a (meth)acrylic polymer.
POLYHEDRAL POLYSILOXANE MODIFIED PRODUCT AND COMPOSITION USING THE MODIFIED PRODUCT
申请人:Kaneka Corporation
公开号:EP2151443A1
公开(公告)日:2010-02-10
The present invention has its object to provide a liquid-form modified product of polyhedral polysiloxane which is excellent in moldability and transparency, and a composition produced using the modified product. In addition, the present invention can provide an easy-to-handle modified product and composition. The present invention provides a modified product of polyhedral polysiloxane which is obtainable by modifying a polyhedral polysiloxane compound (a) with a compound (b), and a composition containing the modified product. The polyhedral polysiloxane compound (a) has an alkenyl group and/or a hydrosilyl group, and the compound (b) has a hydrosilyl group and/or an alkenyl group each capable of hydrosilylation with the component (a).