TECHNOLOGY FOCUS - POLYMERS - Preferred Process: The ployisocyanate is produced by using an ester group-containing hydroxyl-functional component in a medium, and has functionality and hydroxyl predictable molecular weight of 134-3000, and an average hydroxyl functionality of 1.8-4. The polyisocyanate components are produced by using a ring opening polymerization of epsilon -caprolactone to obtain polyester diol. The polyisocyanate components are produced by reaction of 1,6-diisocyanatohexane with an ester group containing hydroxyl functional component in compliance with an equivalent ratio of isocyanate groups to hydroxyl groups of 4:1 to 50:1. The low monomer polyisocyanate components are produced by using zinc carboxylates as catalyst. The polyisocyante monomer is obtained by using zinc(II)-n-octanoate, zinc(II)-2-ethyl-1-hexanoate, and/or zinc(II)-stearate as a catalyst. The polyisocyanate is produced using quaternary ammonium carboxylate, quaternary ammonium hydroxide and/or quaternary ammonium or phosphonium hydrogen polyfluoride as catalysts. The polyisocyanate monomer components are produced by using N,N,N-trimethyl-N-(2-hydroxyethyl)-ammonium hydroxide, N,N,N-trimethyl-N-(2-hydroxypropyl)-ammonium hydroxide, N,N,N-trimethyl-N-(2-hydroxybutyl)-ammonium hydroxide and/or N,N,N-trimethyl-N-benzylammonium hydroxide as catalysts. The polyisocyanate monomer components are prepared using tertiary phosphines as catalysts. The polyisocyanate monomer component is prepared using tributylphosphine, trioctylphosphine and/or dicyclopentylbutylphosphine as a catalyst. The production of low-monomer polyisocyanate component comprises reaction of 1,6-diisocyanatohexane with ester groups containing hydroxyl -functional component terminated at a desired degree of conversion by addition of a terminator. In the production of polyisocyanate components, the unreacted monomeric 1,6-diisocyanatohexane is separated by extraction or thin-film distillation from the reaction product. The reaction of reaction partners is carried out at a temperature of 160 degrees C under a pressure of 300 bar. Preferred Components: The reaction partners are hydroxy-, amino- and/or mercapto compounds, having an average molecular weight of 62-12000. The reaction partners are polyether polyols, polyester polyols, polycarbonate polyols and/or aminopolyethers, having an average molecular weight of 500-12000 and/or the hydroxy-and/or amino-functional components have an average molecular weight of 62-500. The auxiliary agent and additives are water as a propellant. EXAMPLE - In a nitrogen boilers, epsilon -caprolactone (5730 g), 1,6-hexanediol (1270 g) and tin (II)-2-ethylhexanoate were added with stirring for 4 hours, heated to 160 degrees C, and cooled to room temperature to obtain polyesterdiol having a viscosity of 330 mPas at 23 degrees C, hydroxyl (OH) value of 172.4 mg potassium hydroxide, acid value of 0.6 mg potassium hydroxide, and average molecular weight of 650 g/mol. Hexamethylene diisocyanate (1596 g) and polyester diol (650 g) were added at a temperature of 90-100 degrees C under dry nitrogen for three hours in stirred until to obtain isocyanate content of 31.8%. After cooling the reaction mixture at 65 degrees C, allophanatization/trimerization was carried out by continuous addition of 0.75% solution of N, N, N trimethyl-N benzyl ammonium hydroxide (15 ml) in 1:1 mixture of 2-ethylhexanol and 2-ethylhexane-1,3-diol for a period of 90 minutes. The isocyanate content of the reaction mixture was 22.8%. The catalyst was deactivated by adding 10% dibutylphosphate solution (0.5 g) in the hexamethylene diisocyanate at a temperature of 130 degrees C and a pressure of 0.1 bar and worked up to obtain polyisocyanate.