Process for the preparation of polyurethane plastics using dianhydro-hexite diols
Abstract
Abstract A process for the preparation of homogeneous and cellular polyurethane plastics by the reaction of (a) organic polyisocyanates; (b) compounds containing at least 2 Zerewitinoff-active hydrogen atoms and having molecular weights of from 400 to 10,000; (c) chain extenders, and, optionally, additional (d) short-chained compounds containing at least 2 Zerewitinoff-active hydrogen atoms and having a molar mass of from 32 to 400, as well as, optionally, (e) catalysts, blowing agents and other known additives, is described, which is characterized in that 1,4-3,6-dianhydro-hexites, preferably 1,4-3,6-dianhydro-D-sorbitol and/or 1,4-3,6-dianhydro-D-mannitol, optionally mixed with lower molecular weight compounds, preferably with polyols having a molecular weight of from 62 to 400, particularly preferably butane diol-1,4 are used as the chain extenders. The new chain extenders produce high quality elastomers and foams.
Inventors
- 👤 Holger Meyborg
- 👤 Kuno Wagner
- 👤 James M. Barnes
- 👤 Herbert Salzburg
Bibliographic Details
Claims Analysis
Total Claims: 10References Cited (Backward Citations)
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