| 摘要 |
<p>Producing polyurethane-coated conducting element, comprises (i) mixing (a) a mixture of aromatic and aliphatic polyisocyanate, with (b) at least one polymeric compound, (c) chain extenders, (d) catalyst and (e) optionally additional auxiliary agent and/or additives to form a reaction mixture, (ii) applying the reaction mixture to a conducting element and (iii) reacting with a polyurethane layer or (ia) carrying out the step (i), (iia) providing the reaction mixture into a mold and hardening into a molded part, and (iiia) removing the molded part and applying to the conducting element. Producing polyurethane-coated conducting element, comprises (i) mixing (a) a mixture of aromatic and aliphatic polyisocyanate, with (b) at least one polymeric compound comprising at least two isocyanate-reactive hydrogen atoms, (c) chain extenders, (d) catalyst and (e) optionally additional auxiliary agent and/or additives to form a reaction mixture, (ii) applying the reaction mixture to a conducting element and (iii) reacting with a polyurethane layer or (ia) carrying out the step (i), (iia) providing the reaction mixture into a mold and hardening into a molded part, and (iiia) removing the molded part and applying to the conducting element. The chain extender ratio (KV) of isocyanates (a) and all isocyanate-reactive compounds of the components (b) to (e) is 1:100. The chain extender ratio (KV) is equal to ((wt.% of aromatic isocyanate, based on the sum of the total weight of the used isocyanate and isocyanate-reactive compounds of the component (b) to (e))x wt.% of isocyanate content of the aromatic isocyanatex 56100)/(( wt.% of chain extender, based on the sum of the total weight of the used isocyanate and isocyanate-reactive compounds of the component (b) to (e))x wt.% of hydroxy number of chain extender)x 4200)x 100). An independent claim is also included for the polyurethane-coated conducting element, which is obtained by the above mentioned method.</p> |
