Synthesis of linear polyoxazolidinones using uretdiones as diisocyanate component

3:

• The process of claim 2, wherein the at least one uretdione diisocyanate (a-i) is selected from the group consisting of isophorone diisocyanate uretdione (IPDI-U), toluene diisocyanate uretdion (TDI-U), methylene diisocyanate uretdione (MDI-U), and a mixture of two or more thereof.

5:

• The process of claim 1, wherein at least 98 weight-% of the epoxide composition (b) consists of the at least one diepoxide (b-i), relative to an overall weight of the epoxide composition (b).

6:

• The process of claim 1, wherein the catalyst composition (c) comprises at least BMPM-Cl.

7:

• The process of claim 1, wherein reacting the isocyanate composition (a) and the epoxide composition (b) in the presence of the catalyst composition (c) is done at a temperature in a range of from 100 to 300° C.;
• and/or
• wherein reacting the isocyanate composition (a) and the epoxide composition, (b) in the presence of the catalyst composition (c) is done at a pressure in a range of from 900 to 1500 mbar.

8:

• The process of claim 4, wherein a molar ratio of the at least one diepoxide (b-i) to the at least one uretdione diisocyanate (a-i) is in a range of from 1.0:0.5 to 0.5:1.0;
• and/or
• wherein a molar ratio of the at least one uretdione diisocyanate (a-i) added in i) to the at least one monoisocyanate (ai-iii) added in ii) is in a range of from 99.9:0.02 to 99.8:0.04.

9:

• The process of claim 1, wherein a catalyst concentration is in a range of from 0.05 Mol-% to 5 Mol-%, relative to epoxide groups of the at least one diepoxide (b-i).

10:

• The process of claim 1, wherein the epoxide composition (h) and the catalyst composition (c) are initially mixed to obtain a pre-mixture (h+c), and wherein the isocyanate composition (a) is added to the pre-mixture (b+c).

11:

• The process of claim 1,
• wherein the process is a bulk process, or
• wherein reacting the isocyanate composition (a) and the epoxide composition (b) in the presence of the catalyst composition (c) is done in a solvent.

12:

• The thermoplastic polymer, obtained from the process according to claim 1.

14:

• A method, comprising:
• forming a fibre or molded article comprising the thermoplastic polymer obtained from the process according to claim 1, by injection molding, calendering, powder sintering, laser sintering, melt pressing, or extrusion.

15:

• The process of claim 3, wherein the at least one uretdione diisocyanate (a-i) comprises TID-U.

16:

• The process of claim 4, wherein the at least one monoisocyanate (ai-iii) is added in an amount in a range of from 0.01 to 0.5 mol-%, in relation to 100 mol-% of the at least one diepoxide (b-i).

17:

• The process of claim 4, wherein the at least one monoisocyanate (ai-iii) is selected from the group consisting of n-hexylisocyanate, cyclohexyl isocyanate, omega-chlorohexamethylene isocyanate, 2-ethyl hexyl isocyanate, n-octyl isocyanate, dodecyl isocyanate, stearyl isocyanate, methyl isocyanate, ethyl isocyanate, butyl isocyanate, isopropyl isocyanate, octadecyl isocyanate, 6-chloro-hexyl isocyanate, cyclohexyl isocyanate, 2,3,4-trimethylcyclohexyl isocyanate, 3,3,5-trimethylcyclohexyl isocyanate, 2-norbornyl methyl isocyanate, decyl isocyanate, dodecyl isocyanate, tetradecyl isocyanate, hexadecyl isocyanate, octadecyl isocyanate, 3-butoxypropyl isocyanate, 3-(2-ethylhexyloxy)-propyl isocyanate, (trimethylsilyl)isocyanate, phenyl isocyanate, ortho-, meta-, para-tolyl isocyanate, chlorophenyl isocyanate, dichlorophenyl isocyanate, 4-nitrophenyl isocyanate, 3-trifluoro methyl phenyl isocyanate, benzyl isocyanate, 2,6-dimethylphenylisocyanate, 3,4-dimethylphenylisocyanate, 3,6-dimethylphenylisocyanate, 4-dodecylphenylisocyanat, 4-cyclohexyl-phenyl isocyanate, 4-pentylphenyl isocyanate, 4-tert-butyl phenyl isocyanate, 1-naphthyl isocyanate, and a mixture of two or more thereof.

18:

• The process of claim 5, wherein the at least one diepoxide (b-i) comprises bisphenol-A-diglycidylether.

19:

• The process of claim 11, wherein the solvent comprises one or more polar aprotic solvents.