Continuous production of a ppg-based tpu

2:

• The thermoplastic polyurethane according to claim 1, wherein no storage or containerizing of the second polyol composition takes place between the reacting according to step (i) and the reacting according to step (ii).

3:

• The thermoplastic polyurethane according to claim 1, wherein the process is run as a continuous process.

4:

• The thermoplastic polyurethane according to claim 1, wherein in the reacting according to step (i) at least 30% of the secondary terminal OH groups of the polypropylene glycol are converted.

5:

• The thermoplastic polyurethane according to claim 1, wherein the polypropylene glycol has a polydispersity Pd of less than 1.5.

6:

• The thermoplastic polyurethane according to claim 1, wherein the polypropylene glycol has a number-average molecular weight Mn in g range from 1200 g/mol to 1750 g/mol and a polydispersity Pd of less than 1.5.

7:

• The thermoplastic polyurethane according to claim 1, wherein the reacting according to step (i) is carried out in a static mixer, reactive extruder or stirred tank (continuous stirred tank reactor, CSTR) or combinations thereof.

8:

• The thermoplastic polyurethane according to claim 1, wherein at least one polyol selected from the group consisting of polyether diols, polyester diols, and poly carbonates, and polycarbonate diols is added to the second polyol composition in the reacting according to step (ii).

9:

• The thermoplastic polyurethane according to claim 1, wherein no further polyol is added to the second polyol composition in the reacting according to step (ii).

10:

• The thermoplastic polyurethane according to claim 1, wherein the second polyisocyanate is selected from the group consisting of methylenediphenyl diisocyanate (MDI), hexamethylene 1,6-diisocyanate (HDI), 1,5-naphthylene diisocyanate (NDI), 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, 3,3′-dimethyl-4,4′-diisocyanatodiphenyl (TODI), p-phenylene diisocyanate (PDI), 1-isocyanato-3,3,5-trimethyl-5-isocyanatomethylcyclohexane (isophorone diisocyanate, IPDI), 4,4′-methylenedicyclohexyl diisocyanate, 2,4′-methylenedicyclohexyl diisocyanate, and 2,2′-methylenedicyclohexyl diisocyanate.

11:

• The thermoplastic polyurethane according to claim 1, wherein a molar ratio of a sum of functionalities of components of the second polyol composition and the chain extender to a sum of functionalities of the polyisocyanate composition is in a range from 1:0.8 to 1:1.3.

12:

• The thermoplastic polyurethane according to claim 1, wherein an index in the reacting according to step (ii) is in a range from 965 to 1100.

13:

• The thermoplastic polyurethane according to claim 1, wherein the thermoplastic polyurethane has a Shore hardness in a range from 50 A to 80 D determined according to DIN 53505.

14:

• The thermoplastic polyurethane according to claim 1, wherein the thermoplastic polyurethane is opaque to transparent.

16:

• A process of obtaining a thermoplastic polyurethane article, the process comprising:
• producing the article with the thermoplastic polyurethane according to claim 1,
• wherein the article is selected from the group consisting of extruded, injection molded and pressed articles, foams, shoe soles, cable sheathings, hoses, profiles, drive belts, fibers, nonwovens, films, moldings, plugs, housings, damping elements for the electricals industry, automotive industry, mechanical engineering, 3-D printing, medicine and consumer goods.

17:

• A shaped article comprising the thermoplastic polyurethane according to claim 1.

18:

• The thermoplastic polyurethane according to claim 1, wherein the first polyisocyanate and the second polyisocyanate are the same.

19:

• The process according to claim 15, wherein the first polyisocyanate and the second polyisocyanate are the same.