Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Compositions to be polymerized by wave energy wherein said...
Patent
1996-05-06
1998-10-06
Berman, Susan W.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Compositions to be polymerized by wave energy wherein said...
522158, 522161, 525246, 525259, 525262, C08J 328, C08F25502, C08F25504, C08F25506
Patent
active
058177078
ABSTRACT:
A graft copolymer of a propylene polymer material is prepared by (1) making an oxidized propylene polymer material by (a) irradiating a porous particulate propylene polymer material in the substantial absence of oxygen, (b) exposing the irradiated propylene polymer material to a controlled amount of oxygen of greater than 0.004% but less than 15% by volume at a temperature of 40.degree. C. to 110.degree. C., and (c) heating the irradiated polymer material to a temperature of at least 110.degree. C. in the presence of a controlled amount of oxygen within the same range as is used in the previous step, (2) dispersing the resulting oxidized propylene polymer material in water in the presence of a surfactant at a temperature of 30.degree. C.-90.degree. C., (3) adding (a) a primary reducing agent, (b) a chelating agent, and (c) a secondary reducing agent, (4) adding at least one vinyl monomer, and (5) recovering the graft copolymer from the reaction mixture.
REFERENCES:
patent: Re29100 (1977-01-01), Patton
patent: 3458597 (1969-07-01), Jabloner
patent: 3949018 (1976-04-01), Agouri et al.
patent: 4443584 (1984-04-01), Michel
patent: 5001197 (1991-03-01), Hendewerk
patent: 5266607 (1993-11-01), Lucas et al.
patent: 5411994 (1995-05-01), Galli et al.
Mikulasova et al., "Role of Polypropylene Polyhydroperoxide in the Emulsion Polymerization of Styrene and Methyl Methacrylate", Chem, Zvesti, 27,263-267 (1973).
Milulasova et al., "Redox Polymerization Systems for the Preparation of Grafted Polypropylene. I. Grafting of Polypropylene with Styrene in the Presence of Triethylenetetramine Metal Chelates", Chem, Zvesti, 27,263-267 (1973).
Citovicky et al., "Redox Polymerization Systems for the Preparation of Grafted Polypropylene. II. Grafting of Polypropylene with Vinyl or Diene Monomers in the Presence of Fe.sup.2+ Chelates", Chem, Zvesti, 27 , 268-272(1973).
DeNicola, Jr. Anthony J.
Syed Abuzar
Berman Susan W.
Montell North America Inc.
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