阅读说明：本技术 用于制备聚氨酯泡沫的不含硅酮的泡沫稳定剂 (Silicone-free foam stabilizers for producing polyurethane foams ) 是由 Z·托莫维奇 S·克罗尼格 K·穆勒 C·哈根 M·苏索夫 于 2019-07-17 设计创作，主要内容包括：本发明涉及制备聚氨酯泡沫的方法,其中将(a)多异氰酸酯、(b)具有对异氰酸酯呈反应性的基团的聚合化合物、(c)不含硅酮的稳定剂、(d)任选地扩链剂和/或交联剂、(e)催化剂、(f)发泡剂和(g)任选地助剂和添加剂混合以形成反应混合物,并使反应混合物完全反应以形成聚氨酯,其中不含硅酮的稳定剂(c)可通过用环氧烷将1至8官能的起始物分子烷氧基化获得,其中所用环氧烷的0重量％至9重量％为环氧乙烷,所用环氧烷的0重量％至50重量％为1,2-环氧丙烷,并且所用环氧烷的至少50重量％包括至少4个碳原子,并且不含硅酮的稳定剂(c)的数均分子量为500至20000g/mol,并且其中基于硅酮的泡沫稳定剂的浓度为少于0.3重量％,基于化合物(b)、(c)、(d)、(e)和(f)的总重量计。本发明还涉及包括不含硅酮的稳定剂(c)的多元醇组分,涉及由本发明方法可获得的聚氨酯泡沫,并涉及本发明的聚氨酯泡沫在封闭空间或在车辆内部的用途。(The invention relates to a process for preparing a polyurethane foam, wherein (a) polyisocyanates, (b) polymeric compounds having groups reactive toward isocyanates, (c) silicone-free stabilizers, (d) optionally chain extenders and/or crosslinkers, (e) catalysts, (f) blowing agents and (g) optionally auxiliaries and additives are mixed to form a reaction mixture and the reaction mixture is reacted to form the polyurethane to completion, wherein the silicone-free stabilizers (c) are obtainable by alkoxylation of 1 to 8-functional starter molecules with alkylene oxides, wherein 0 to 9% by weight of the alkylene oxides used are ethylene oxide, 0 to 50% by weight of the alkylene oxides used are 1, 2-propylene oxide and at least 50% by weight of the alkylene oxides used comprise at least 4 carbon atoms and the number-average molecular weight of the silicone-free stabilizers (c) is from 500 to 20000g/mol, and wherein the concentration of the silicone-based foam stabilizer is less than 0.3% by weight, based on the total weight of the compounds (b), (c), (d), (e) and (f). The invention also relates to a polyol component comprising a silicone-free stabilizer (c), to a polyurethane foam obtainable by the inventive method, and to the use of the inventive polyurethane foam in enclosed spaces or in vehicle interiors.)

1. a method of preparing a polyurethane foam comprising mixing

(a) A polyisocyanate,

(b) a polymeric compound having groups reactive with isocyanates,

(c) a stabilizing agent which does not contain silicone,

(d) optionally a chain extender and/or a cross-linker,

(e) a catalyst,

(f) a blowing agent,

(g) optionally an auxiliary agent and an additive,

to obtain a reaction mixture and reacting said reaction mixture to obtain a polyurethane,

wherein the silicone-free stabilizer (c) is obtainable by alkoxylation of 1 to 8 functional starter molecules with alkylene oxides, wherein 0 to 9 wt.% of the alkylene oxides used are ethylene oxide, 0 to 50 wt.% of the alkylene oxides used are 1, 2-propylene oxide, and at least 50 wt.% of the alkylene oxides used comprise at least 4 carbon atoms, and the number average molecular weight of the silicone-free stabilizer (c) is from 500 to 20000g/mol, and wherein the content of silicone-based foam stabilizer is less than 0.3 wt.%, based on the total weight of compounds (b), (c), (d), (e) and (f).

2. The process according to claim 1, wherein at least 90% by weight of the alkylene oxide used in the preparation of the silicone-free stabilizer (c) comprises at least 4 carbon atoms.

3. The process according to claim 1 or 2, wherein the alkylene oxide comprising at least 4 carbon atoms used in the preparation of the silicone-free stabilizer (c) is selected from the group consisting of 1, 2-butylene oxide, 1, 2-pentylene oxide and mixtures thereof.

4. The process according to any one of claims 1 to 3, wherein the average functionality of the starter molecules used for preparing the silicone-free stabilizer (c) is from 1 to 3.

5. The process according to any one of claims 1 to 4, wherein some or all of the remaining OH groups of the silicone-free stabilizer (c) are blocked after alkoxylation.

6. The process according to any one of claims 1 to 5, wherein the polymeric compound having groups reactive toward isocyanates comprises a polyether alcohol (b1), said polyether alcohol (b1) being obtainable by addition of ethylene oxide, propylene oxide or mixtures thereof to starter molecules, wherein at least 90 mol% of the alkylene oxides used for preparing the polyether alcohol (b1) are selected from ethylene oxide, 1, 2-propylene oxide and mixtures thereof.

7. The process according to claim 6, wherein the proportion of silicone-free foam stabilizer (c) is preferably from 0.01 to 10% by weight, based on the total weight of compounds (b), (c), (d), (e) and (f).

8. The method of any one of claims 1 to 7, wherein no silicone-based foam stabilizer is used.

9. The method of any one of claims 1 to 8, wherein the polyurethane foam is a flexible polyurethane foam having a compressive stress at 10% compression of 15kPa or less and a density of 10 to 100g/L according to DIN 53421/DIN EN ISO 604.

10. The process of any one of claims 1 to 9, wherein the catalyst (e) comprises a combinable amine catalyst.

11. A polyol mixture comprising

(b) A polymeric compound having groups reactive with isocyanates,

(c) a stabilizing agent which does not contain silicone,

(d) optionally a chain extender and/or a cross-linker,

(e) a catalyst,

(f) a blowing agent, and

(g) optionally an auxiliary agent and an additive,

wherein the silicone-free stabilizer (c) is obtainable by alkoxylation of 1 to 8 functional starter molecules with alkylene oxides, wherein 0 to 9 wt.% of the alkylene oxides used are ethylene oxide, 0 to 50 wt.% of the alkylene oxides used are 1, 2-propylene oxide, and at least 50 wt.% of the alkylene oxides used comprise at least 4 carbon atoms, and the number-average molecular weight of the silicone-free stabilizer (c) is from 500 to 20000g/mol, and wherein the content of silicone-based foam stabilizer is less than 0.3 wt.%, based on the total weight of compounds (b), (c), (d), (e) and (f).

12. Polyurethane obtainable by the process of any one of claims 1 to 10.

13. Use of the polyurethane according to claim 12 in enclosed spaces or in vehicle interiors.

14. Use according to claim 13 for the production of mattresses or seat cushions or head cushions in vehicles.

15. Silicone-free stabilizers (c) obtainable by alkoxylation of 1 to 8-functional starter molecules with 1, 2-butylene oxide and/or 1, 2-pentylene oxide, wherein at least 50% by weight of the alkylene oxides used are 1, 2-butylene oxide and/or 1, 2-pentylene oxide and the number-average molecular weight of the silicone-free stabilizers (c) is from 500 to 20000 g/mol.