A New Method of Photocatalytic Degradation of PVC Plastics

【Patent Type】 Invention Patent 【Patent Name】 A New Method of Photocatalytic Degradation of PVC Plastics 【Applicant】 Beijing University of Chemical Technology [Inventor] Zhang Kaihua; Cao Weiliang [Main Applicant Address] 100029 Beisanhuan East Road, Chaoyang District, Beijing 100029 Number 15 [application number] 200410039398.6
【 Application Date 】 2004.02.17
【 Validation Announcement Number 】 1560127
【 Validation announcement date 】 2005.01.05
【 Main Category 】 C08L27/06
[Category] C08L27/06 C08K3/24
【Sovereignty Items】 1 A new method for waste disposal of PVC plastics, which is characterized by the addition of photocatalyst heteropoly compounds to PVC plastics, uniform film formation and light irradiation, utilizing the unique oxidation-reduction properties of heteropoly compounds. Rapid Photocatalytic Oxidative Degradation of PVC.
[Instructions CD-ROM] D0501
[Abstract] The present invention relates to a new method of waste disposal of PVC plastics, in particular to providing a new method that is simple, practical and capable of rapidly photocatalytically degrading waste PVC without affecting the transparency of the PVC product. The invention is characterized in that a photocatalyst heteropoly compound is added into the PVC plastic, the film is evenly formed, and under the irradiation of light, the unique oxidation-reduction property of the heteropoly compound is used to achieve rapid photocatalytic oxidation degradation of the PVC. The advantages of the present invention are mainly two points: (1) Most of the heteropoly compounds are non-toxic and colorless, and meet the conditions of being a PVC transparent packaging material additive. (2) Heteropoly compounds can rapidly and efficiently photocatalytically degrade PVC. Its photocatalytic efficiency is higher than that of TiO#-[2], a semiconductor nanomaterial with excellent performance. (3) Heteropoly compounds have a variety of different structures and compositions, which determine their different catalytic activities in photocatalytic degradation of plastics, which helps to control the degradation time of photodegradable plastics.