阅读说明：本技术 用于包埋在过滤元件制备中的中空纤维的储存稳定的聚氨酯包封化合物 (Storage-stable polyurethane encapsulation compounds for hollow fibers embedded in filter element preparation ) 是由 P·博尔策 A·卡姆 T·马修 R·弗里茨 G·卢卡特 于 2018-04-27 设计创作，主要内容包括：本发明涉及用于包埋过滤元件的中空纤维的聚氨酯包封化合物,其可通过下述过程获得：使多元醇组分(A)和包含至少一种芳族异氰酸酯的异氰酸酯组分(B)混合,以形成反应混合物,并使该混合物反应,以形成聚氨酯包封化合物,其中多元醇组分(A)包含至少一种羟值大于50至小于500mg KOH/g且官能度为2至6的基于脂肪酸的多元醇(a1),和至少一种铋催化剂(a2),其可通过使羧酸铋(a2-I)与具有至少一个叔氮原子和至少一个对异氰酸酯呈反应性的氢原子的胺化合物(a2-II)混合获得,其中铋与胺化合物(a2-II)的摩尔比为1:0.5至1:50。本发明还涉及一种使用所述聚氨酯包封化合物来制备过滤元件的方法,以及涉及所述聚氨酯包封化合物用于包埋中空纤维的用途。(The invention relates to a polyurethane encapsulation compound for embedding hollow fibers of a filter element, which can be obtained by the following process: mixing a polyol component (a) and an isocyanate component (B) comprising at least one aromatic isocyanate to form a reaction mixture and reacting the mixture to form a polyurethane encapsulating compound, wherein the polyol component (a) comprises at least one fatty acid based polyol (a1) having a hydroxyl number of greater than 50 to less than 500mg KOH/g and a functionality of 2 to 6, and at least one bismuth catalyst (a2) obtainable by mixing a bismuth carboxylate (a2-I) with an amine compound (a2-II) having at least one tertiary nitrogen atom and at least one hydrogen atom reactive with isocyanate, wherein the molar ratio of bismuth to the amine compound (a2-II) is from 1:0.5 to 1: 50. The invention also relates to a method for producing a filter element using said polyurethane encapsulation compound, and to the use of said polyurethane encapsulation compound for embedding hollow fibers.)

1. A polyurethane encapsulating compound for embedding hollow fibers of a filter element obtainable by the process of:

Mixing a polyol component (A) and an isocyanate component (B) comprising at least one aromatic isocyanate to obtain a reaction mixture and allowing the mixture to react to completion to obtain a polyurethane encapsulating compound, wherein the polyol component (A) comprises

(a1) At least one fatty acid-based polyol (a1) having a hydroxyl number of greater than 50 to less than 500mg KOH/g and a functionality of 2 to 6, and

(a2) At least one bismuth catalyst obtainable by mixing a bismuth carboxylate (a2-I) with an amine compound (a2-II), said amine compound (a2-II) having at least one tertiary nitrogen atom and at least one isocyanate-reactive hydrogen atom, wherein the molar ratio of bismuth to amine compound (a2-II) is from 1:0.5 to 1: 50.

2. The polyurethane encapsulating compound according to claim 1, wherein the amine compound (a2-11) has at least three isocyanate-reactive hydrogen atoms.

3. The polyurethane encapsulating compound according to claim 1 or 2, wherein the amine compound (a2-11) is an alkoxylated amine having a hydroxyl number of 500 to 1200mg KOH/g and 3 to 6 hydrogen atoms reactive with isocyanate groups.

4. The polyurethane encapsulating compound of claim 3 wherein the amine compound (a2-11) is a diamine-initiated propylene oxide having a nominal functionality of 3 to 6 and a hydroxyl number of 500 to 900mg KOH/g.

5. The polyurethane encapsulating compound according to any one of claims 1 to 4, wherein the fat-based polyol (a1) comprises castor oil or an alkoxylation product of castor oil.

6. The polyurethane encapsulating compound according to any one of claims 1 to 5, wherein the polyol component (A) comprises at least one at least difunctional polyol (a3) having a functionality of 2 to 8 and a hydroxyl number of 600 to 1350mg KOH/g and being free of tertiary nitrogen atoms.

7. The polyurethane encapsulation compound according to any one of claims 1 to 6, wherein the proportion of polyol (a1) based on fatty acid is 60 to 98 wt.%, the proportion of bismuth catalyst (a2) is 0.001 to 1.0 wt.%, and the proportion of polyol (a3) is 0 to 25 wt.%, each based on the total weight of components (a1) to (a 3).

8. the polyurethane encapsulating compound according to any one of claims 1 to 7, wherein isocyanate component (B) comprises a prepolymer of isomers and/or homologues of diphenylmethane diisocyanate.

9. A method of manufacturing a filter element, wherein a bundle of hollow fibers is embedded at the end thereof and cured in the polyurethane encapsulating compound according to any one of claims 1 to 8.

10. The method of claim 9, wherein the filter element is a filter element used in medicine.

11. The method of claim 10, wherein the filter element is a diafiltration filter element.

12. The method of claim 9, wherein the filter element is a water filter element.

13. Use of a polyurethane encapsulating compound according to any one of claims 1 to 8 for the partial embedding of hollow fibers.

Examples E1 to E4 show that storage-stable mixtures with oleyl ester chemical polyols can be obtained by using catalysts based on bismuth carboxylates and alkanolamines.

In addition to N, N, N ', N' -tetrakis (2-hydroxypropyl) ethylenediamine and N, N, N ', N' -tetrakis (2-hydroxyethyl) ethylenediamine, other alkanolamines may also be used to prepare the stable bismuth catalyst. This will be illustrated by the following examples.