制备有机聚硅氧烷凝胶的方法

文档序号:1525072 发布日期:2020-02-11 浏览:28次 >En<

阅读说明:本技术 制备有机聚硅氧烷凝胶的方法 (Process for preparing organopolysiloxane gels ) 是由 F·桑德迈尔 C·朔塞尔 于 2017-06-12 设计创作,主要内容包括:本发明描述了一种制备有机聚硅氧烷凝胶的方法,其中使用(1a)由式SiO&lt;Sub&gt;2&lt;/Sub&gt;(Q单元)和R&lt;Sub&gt;3&lt;/Sub&gt;SiO&lt;Sub&gt;1/2&lt;/Sub&gt;和R&lt;Sub&gt;2&lt;/Sub&gt;R&lt;Sup&gt;1&lt;/Sup&gt;SiO&lt;Sub&gt;1/2&lt;/Sub&gt;(M单元)组成的不饱和有机聚硅氧烷树脂,其中,R和R&lt;Sup&gt;1&lt;/Sup&gt;是具有权利要求1中所限定的定义,以及任选存在的(1b)具有极性有机基团和可氢化硅烷化端基的化合物,与(2)两种具有不同的平均链长和下式(R&lt;Sup&gt;2&lt;/Sup&gt;&lt;Sub&gt;3-x&lt;/Sub&gt;H&lt;Sub&gt;x&lt;/Sub&gt;SiO&lt;Sub&gt;1/2&lt;/Sub&gt;)(R&lt;Sup&gt;2&lt;/Sup&gt;&lt;Sub&gt;2&lt;/Sub&gt;SiO&lt;Sub&gt;2/2&lt;/Sub&gt;)&lt;Sub&gt;a&lt;/Sub&gt;(R&lt;Sup&gt;2&lt;/Sup&gt;HSiO&lt;Sub&gt;2/2&lt;/Sub&gt;)&lt;Sub&gt;b&lt;/Sub&gt;(R&lt;Sup&gt;2&lt;/Sup&gt;&lt;Sub&gt;3-x&lt;/Sub&gt;H&lt;Sub&gt;x&lt;/Sub&gt;SiO&lt;Sub&gt;1/2&lt;/Sub&gt;)(I)的含Si-H的有机聚硅氧烷的混合物在(3)促进Si-键合氢加成到脂族多键的催化剂的存在下进行反应,其中R&lt;Sup&gt;2&lt;/Sup&gt;具有权利要求1中所限定的定义,x是0或1,a和b各自为≥0的整数,条件是总和a+b≥30,所述有机聚硅氧烷平均含有至少2个Si-键合的氢原子,优选至少3个Si-键合的氢原子,并且所述两种有机聚硅氧烷的长链的链长(a+b)是短链有机聚硅氧烷的链长(a+b)的至少3倍,其中(1a),任选存在的(1b)和(2)分散在(4)稀释剂中,并且该反应在加入(5)用作催化剂毒物的终止剂化合物而终止。(The invention relates to a method for producing organopolysiloxane gels, wherein (1a) is used 2 (Q unit) and R 3 SiO 1/2 And R 2 R 1 SiO 1/2 (M units) of an unsaturated organopolysiloxane resin of which R and R 1 Is a compound having the definition as defined in claim 1, and optionally present (1b) a compound having a polar organic group and a hydrosilylatable end group, and (2) two compounds having different average chain lengths and the formula (R) 2 3‑x H x SiO 1/2 )(R 2 2 SiO 2/2 ) a (R 2 HSiO 2/2 ) b (R 2 3‑x H x SiO 1/2 ) (ii) a mixture of Si-H containing organopolysiloxanes of formula (I) in which R is reacted in the presence of (3) a catalyst which promotes the addition of Si-bonded hydrogen to aliphatic multiple bonds 2 Having the definitions defined in claim 1X is 0 or 1, a and b are each integers &gt; 0, with the proviso that the sum a &#43; b &gt; 30, the organopolysiloxanes containing on average at least 2 Si-bonded hydrogen atoms, preferably at least 3 Si-bonded hydrogen atoms, and the chain length of the long chains (a &#43; b) of the two organopolysiloxanes being at least 3 times the chain length (a &#43; b) of the short-chain organopolysiloxanes, wherein (1a), optionally (1b) and (2) are dispersed in (4) diluents and the reaction is terminated by addition of (5) terminator compounds which act as catalyst poisons.)

19页详细技术资料下载
上一篇:一种医用注射器针头装配设备
下一篇:具有塑料基体的片状半成品

网友询问留言

已有0条留言

还没有人留言评论。精彩留言会获得点赞!

精彩留言,会给你点赞!