公开(公告)号：US4396524A

公开(公告)日：1983-08-02

申请号：US218575

申请日：1980-12-22

申请人： Hans U. Hempel ,  Edmund Schmadel ,  Herbert Reuter ,  Gunther Vogt

发明人： Hans U. Hempel ,  Edmund Schmadel ,  Herbert Reuter ,  Gunther Vogt

IPC分类号： B01D19/04 ,  C08G77/00 ,  C08G77/42 ,  C08G77/44 ,  C08K3/36 ,  C08L83/04 ,  C08L83/10 ,  C11D3/00 ,  C11D3/37

CPC分类号： C11D3/373 ,  B01D19/0409 ,  C08G77/44 ,  C08K3/36 ,  C11D3/0026

摘要： This invention is directed to a method of preparing block copolymers useful as foam inhibitors, which method comprises the steps of:(1) mixing (a) from 100 parts by weight of a polydimethylsiloxane that is liquid at 20.degree. C., and (b) from about 2 to 20 parts by weight of a spatially cross-linked polysiloxane resin with a molecular weight of from about 1000 to 10,000;(2) heating said mixture in the presence of a catalyst until the viscosity is at least 200 mPa.s, as measured at 20.degree. C., to form a block polymer;(3) mixing said block polymer with (c) from about 0.5 to 15 parts by weight of a silicon dioxide aerogel; and(4) heating the mixture from step (3).

摘要翻译： 本发明涉及一种制备用作泡沫抑制剂的嵌段共聚物的方法，该方法包括以下步骤：（1）将（a）100重量份在20℃下为液体的聚二甲基硅氧烷和（b ）约2至20重量份的分子量为约1000至10,000的空间交联聚硅氧烷树脂; （2）在催化剂存在下加热所述混合物，直到在20℃下测得的粘度至少为200mPa.s以形成嵌段聚合物; （3）将所述嵌段聚合物与（c）约0.5-15重量份的二氧化硅气凝胶混合; 和（4）加热来自步骤（3）的混合物。

公开(公告)号：US4891154A

公开(公告)日：1990-01-02

申请号：US059170

申请日：1987-06-11

申请人： Holger Tesmann ,  Hans U. Hempel ,  Heinz Mueller ,  Margarete Gruenert ,  Adolf Asbeck

发明人： Holger Tesmann ,  Hans U. Hempel ,  Heinz Mueller ,  Margarete Gruenert ,  Adolf Asbeck

IPC分类号： B01D19/04 ,  C07F7/04 ,  C07F7/18

CPC分类号： C07F7/1824 ,  B01D19/0409 ,  C07F7/045 ,  Y10S516/01

摘要： Substantially water-insoluble silicic acid esters corresponding to the following general formula ##STR1## are used to foam inhibitors in foaming systems. In the above formula, X and Y represent the group --OR or a methyl group, R represents a polypropylene glycol ether group and, optionally, a polyethylene glycol ether group which may be substituted by alkoxyl, amino-alkyl, acyl, acylamino, dialkoxyl and oxyaminoalkyl groups containing from 4 to 24 carbon atoms. The total number of glycol ether groups amounts to between 1 and 100, the number of polypropylene glycol ether groups preferably being at least equal to or larger than the number of ethylene glycol ether groups.

摘要翻译： 对应于下列通式“IMAGE”的基本上不溶于水的硅酸酯用于发泡系统中的泡沫抑制剂。 在上式中，X和Y表示基团-OR或甲基，R表示聚丙二醇醚基团，任选地可以被烷氧基，氨基 - 烷基，酰基，酰氨基，二烷氧基 和含有4至24个碳原子的氧基氨基烷基。 二醇醚基团的总数为1至100，聚丙二醇醚基团的数目优选至少等于或大于乙二醇醚基团的数量。