摘要:
Process for the treatment of ground polyolefin material originating from scrap dairy product containers with at least one agent chosen from hydrogen peroxide, steam and sodium hydroxide in a quantity which is effective for deodorizing the polyolefin. Ground material obtained by this process and exhibiting an imperceptible level of residual odour of aged milk. Use of the deodorized ground material obtained by this process for the production of shaped objects.
摘要:
The compositions contain, as heat stabilizer, an effective amount of bismuth carboxylate chosen from bismuth succinate, acrylate and terephthalate and their mixtures. In general, this amount is at least 0.05 part and does not exceed 5 parts per 100 parts by weight of vinylidene fluoride polymer. The heat stabilizers according to the invention are suitable both for the thermal stabilization of virgin polymers and for the stabilization/decoloration of thermally degraded waste polymers.