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  1. h. ulrich, chemistry and technology of isocyanates, wiley, 1998.
  2. j. h. saunders, k. c. frisch, polyurethanes: chemistry and technology, part i & ii, interscience publishers, 1962.
  3. m. szycher, szycher’s handbook of polyurethanes, crc press, 2nd edition, 2016.
  4. g. oertel, polyurethane handbook, hanser gardner publications, 2nd edition, 1994.

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