Patent ID: 11926701
Assignee: COVESTRO DEUTSCHLAND AG
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 14:
15. A polyurethane elastomer or polyurethaneurea elastomer obtained by reacting an NCO prepolymer as claimed in claim 9 with
(i) at least one aliphatic diol having primary hydroxyl groups and a number-average molecular weight of 62 to 202 and in amounts of 0-10 wt %, based on the at least one aliphatic diol, compounds from the group consisting of short-chain polyols having functionalities >2 to 4, polyols of higher molecular weight having a functionality of 2, and polycarbonate polyols as claimed in claim 1, optionally in the presence of water, and optionally further auxiliaries and adjuvants, and/or
(ii) at least one aromatic diaminic chain extender selected from the group consisting of 4,4′-methylenebis(2-chloro aniline) (MB OCA), 3,3′,5,5′-tetraisopropyl-4,4′-diaminodiphenylmethane, 3,5-dimethyl-3 ‘,5’-diisopropyl-4,4′-diaminophenylmethane, 3,5-diethyl-2,4-tolylenediamine, 3,5-diethyl-2,6-tolylenediamine (DETDA), 4,4 -methylenebis(3-chloro-2,6-diethylaniline), 3,5-dimethylthio-2,4-tolylenediamine, 3,5-dimethylthio-2,6-tolylenediamine, isobutyl 3,5-diamino-4-chlorobenzoate, and mixtures thereof, optionally in the presence of water, and optionally further auxiliaries and adjuvants.