Free radical grafting of monomers onto polypropylene resins
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United States of America Patent
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Feb 22, 2000
Grant Date -
N/A
app pub date -
May 14, 1997
filing date -
Aug 26, 1994
priority date (Note) -
Expired
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Abstract
A method of free radical grafting of monomers onto a polypropylene resin includes: (i) mixing the polypropylene resin with an allylepoxy compound, a styrenic compound and a peroxide as an initiator, (ii) heating the mixture to a temperature which is higher than the melting point of the polypropylene resin and the decomposition temperature of the peroxide, at conditions of continuous mixing until a desired degree of grafting of the allylepoxy compound and the styrenic compound onto the polypropylene resin has been achieved, and (iii) cooling and comminuting the obtained composition. A grafted polypropylene composition provided by the method includes an amount of glycidyl methacrylate of 0 to 10% by weight and an amount of styrene of 0 to 10% by weight, calculated on the polypropylene resin. The composition may be used as a compatibilizer in the manufacturing of polymer blends, as a polymer adhesion promoter, and in articles which require an improved printability.
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