| 摘要 |
<p>The invention relates to a process for the ozone protection of an imagewise exposed and developed photopolymer flexographic printing plate, having an elastomeric, thermoplastic polymeric binder, which comprises applying to the exposed and developed surface of the flexographic printing plate at least one known liquid polyether of the formulas:
<Chemistry id="chema01" num="0001"><Image id="ia01" he="3" wi="43" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry><Chemistry id="chema02" num="0002"><Image id="ia02" he="4" wi="43" file="IMGA0002.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>(c) a block copolymer of the formula
<Chemistry id="chema03" num="0003"><Image id="ia03" he="7" wi="67" file="IMGA0003.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>(d) a random copolymer of the formula
<Chemistry id="chema04" num="0004"><Image id="ia04" he="6" wi="68" file="IMGA0004.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry><Chemistry id="chema05" num="0005"><Image id="ia05" he="16" wi="38" file="IMGA0005.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein R, = H, or methyl R<Sub>2</Sub> = H, alkyl or alkylene with C<Sub>12</Sub>-C<Sub>18</Sub>, and saturated and unsaturated fatty acid radicals with C<Sub>12</Sub>-C<Sub>18</Sub>. p = 1-4 and wherein n, m and m, and x, y, and z are so selected that the molecular weight (<Image id="ia06" he="6" wi="3" file="IMGA0006.TIF" imgContent="character" imgFormat="TIFF" inline="yes" /><Sub>n</Sub>) of the molecule is about 500 to 5000.</p> |
