阅读说明：本技术 聚醚酯弹性体的制备方法 (Preparation method of polyether ester elastomer ) 是由 F·普里索克 E·波瑟尔特 M·舍默 F·普赫 D·肯普弗特 于 2019-03-14 设计创作，主要内容包括：本发明涉及一种制备嵌段共聚物的方法,其包括在大于160℃的温度下使至少一种熔点为160℃至350℃的芳族聚酯与至少一种选自二胺和二醇的化合物转化以制备混合物(G-a)；并将所述混合物(G-a)在0℃至300℃的温度下热处理1至240小时以制备嵌段共聚物,其中在步骤(a)中,所述化合物选自二胺和二醇并且其用量为0.02至0.3摩尔/摩尔聚酯中的酯键。本发明还涉及通过所述方法获得或可获得的嵌段共聚物,并且涉及所述嵌段共聚物用于制备以下产品的用途：挤出制品、注塑制品和压制制品以及泡沫、泡沫颗粒、鞋底、电缆护套、软管、型材、传动皮带、纤维、非织造布、膜、模制品、插头、外壳、用于电气工业、汽车工业、机械工程、3D打印的阻尼元件、药品和消费品。(The present invention relates to a process for preparing a block copolymer comprising converting at least one aromatic polyester having a melting point of from 160 ℃ to 350 ℃ with at least one compound selected from diamines and diols at a temperature of more than 160 ℃ to prepare a mixture (G-a); and heat-treating the mixture (G-a) at a temperature of 0 to 300 ℃ for 1 to 240 hours to prepare a block copolymer, wherein in step (a), the compound is selected from diamines and diols and is used in an amount of 0.02 to 0.3 mole per mole of ester bonds in the polyester. The invention also relates to a block copolymer obtained or obtainable by said process and to the use of said block copolymer for the preparation of: extruded, injection molded and pressed articles as well as foams, foam pellets, shoe soles, cable jackets, hoses, profiles, drive belts, fibers, nonwovens, films, moldings, plugs, housings, damping elements for the electrical industry, the automotive industry, mechanical engineering, 3D printing, pharmaceuticals and consumer products.)

1. A method of preparing a block copolymer comprising the steps of:

(a) reacting at least one aromatic polyester having a melting point of from 160 ℃ to 350 ℃ with at least one compound (V1) selected from diamines and diols at a temperature greater than 160 ℃ to obtain a mixture (G-a);

(b) heat-treating the mixture (G-a) at a temperature of 100 ℃ to 300 ℃ for 1 to 240 hours to obtain a block copolymer,

wherein in step (a), the compound (V1) selected from the group consisting of diamines and diols is used in an amount of 0.02 to 0.3 mole per mole of ester bonds in the polyester.

2. The process of claim 1, wherein the reaction of step (a) is carried out in a continuous manner.

3. The process according to claim 1 or 2, wherein the reaction of step (a) is carried out in a stirred tank, reactor, extruder or kneader.

4. The process according to any one of claims 1 to 3, wherein the compound (V1) selected from diamines and diols has an average molecular weight Mn of from 200 to 2000 g/mol.

5. The method according to any one of claims 1 to 4, wherein the aromatic polyester is selected from polybutylene terephthalate (PBT), polyethylene terephthalate (PET) and polyethylene naphthalate (PEN).

6. The process according to any one of claims 1 to 5, wherein the compound (V1) selected from diamines and diols is a polymeric diamine or a polymeric diol.

7. The process according to any one of claims 1 to 6, wherein the compound (V1) selected from diamines and diols is a polyether diol.

8. The process according to any one of claims 1 to 7, wherein the compound (V1) selected from diamines and diols is polytetrahydrofuran.

9. A block copolymer obtained or obtainable by the process of any one of claims 1 to 8.

10. Use of a block copolymer according to claim 9 or obtained or obtainable by the process of any one of claims 1 to 8 for the preparation of: extruded, injection molded and pressed articles as well as foams, foam pellets, shoe soles, cable jackets, hoses, profiles, drive belts, fibers, nonwovens, films, moldings, plugs, housings, damping elements for the electrical industry, the automotive industry, mechanical engineering, 3D printing, pharmaceuticals and consumer products.

Examples

1. The following raw materials were used:

polyol 1: polybutylene terephthalate (PBT) with weight average molecular weight of 60000g/mol

Polyol 2: polyether polyol having an OH number of 453.4, a weight-average molecular weight of 248g/mol and having only primary OH groups (functionality: 2, based on tetrahydrofuran)

Polyol 3: polyether polyol having an OH number of 112.2, a weight-average molecular weight of 1000g/mol and having only primary OH groups (functionality: 2, based on tetrahydrofuran)

2. Reaction and Heat treatment examples

The polyester (polyol 1) was melted in a DSM mini-extruder at 260 ℃ and reacted with another polyol (polyol 2 or 3) for 10 minutes (table 1). The mixture was discharged and subsequently heat treated in an oven at 170 ℃ for 32 hours under a nitrogen atmosphere.