POLYUREA FILM AND METHOD FOR PREPARING SAME
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United States of America Patent
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Issued Date -
May 13, 2010
app pub date -
Apr 1, 2008
filing date -
Apr 16, 2007
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Abstract
It is an object of the invention to prepare a polyurea film with excellent transparency, light resistance and mass-scale productivity on a substrate of a resin-molded article by a method of vacuum deposition polymerization. A polyurea film obtained by vacuum deposition polymerization of an aromatic alkyl-, alicyclic- or aliphatic diisocyanate monomer and an aromatic alkyl-, alicyclic- or aliphatic diamine monomer, where the diisocyanate monomer and the diamine monomer are selected from diisocyanate monomers and diamine monomers in a relation such that the difference in the activation energy required for the elimination from a substrate between these monomers is 10 kJ or less.
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