| 摘要 |
<p>FLAME RETARDANT FLEXIBLE URETHANE The discoloration occurring during commercial production of large buns or slabs of low density, flexible and semiflexible polyetherurethane foams containing chlorinecontaining polymers such as polyvinyl chloride, zinc oxide and antimony oxide, in which optionally part of the chlorine-containing polymer can be replaced with a chlorinated paraffin provided a proportionate reduction is made in the amount of the zinc oxide employed, is reduced or prevented by using a small amount of a zinc salt selected from the group consisting of and the Rs being the same or different, where R is -R', -OR', -halogen, -hydrogen, or a -nitro group, R' being a Cl to C10 alkyl, cycloalkyl, aralkyl, alkaryl or aryl group, preferably said zinc salt has the formula: .</p> |
