发明名称 |
Acetal group-containing organopolysiloxane used as gas extraction and antifoaming agents in organic systems has units having three different hydrocarbon-based groups in them |
摘要 |
Acetal group-containing organopolysiloxane contains units having three different hydrocarbon-based groups in them, giving good solubility in low polarity media. Acetal group-containing organopolysiloxane contains units of formula (I): RaAbSiO4-a-b/2 (I) R = 1-18C hydrocarbon; A = group of formula (II); R<1> = 1-6C hydrocarbon; R<2> = 2-4C hydrocarbon; R<3> and R<4> = H or R; R<5> = R or R<4> and R<5> form a group R<6> together; R<6> = 2-10C hydrocarbon; v and w = 0 or an integer; where v+w = 1-16 s and t = 0 or 1 and s + t = 1 or 2; y = 0 or 1 and x + y = 1 or 2; a-0 or 1-3; b = 0, 1 or 2; and a+3 = at most 3 and at least one group A is present. An Independent claim is included for the preparation of the above organopolysiloxane by reacting compounds of formula (III) with organopolysiloxanes with units of formula (IV) and with linear ethers of formula (Va) or cyclic ethers of formula (Vb) in the presence of the addition of Si-bound H to aliphatic multiple bond-forming catalyst and an acid catalyst:
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申请公布号 |
DE19836832(A1) |
申请公布日期 |
2000.05.25 |
申请号 |
DE19981036832 |
申请日期 |
1998.08.13 |
申请人 |
WACKER-CHEMIE GMBH |
发明人 |
HERZIG, CHRISTIAN;BURGER, WILLIBALD |
分类号 |
B01D19/04;C08G77/38;C08G77/46;C09D7/06;C10L1/28;(IPC1-7):C08G77/38;C08G77/14;C10L1/08 |
主分类号 |
B01D19/04 |
代理机构 |
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