Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2005-02-08
2005-02-08
Seidleck, James J. (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S078000, C525S080000, C525S087000, C525S310000
Reexamination Certificate
active
06852799
ABSTRACT:
Product, method and use of a copolymer AB as a compatibilizing agent between a polar thermoplastic polymer C and a polyolefine D. The method of making AB comprise the steps of: a) melting a copolymer (A) comprising a larger amount of methylmethacrylate units and a smaller amount of functional vinyl or (meth)acrylate units wherein functional moiety is selected in the group consisting of (a hydroxyl, a carboxylic, a glycidyl or an amine functional group); together with maleic anhydride grafted polypropylene (B) allowing condensation reaction to occur between the functions under “A” and the anhydride under “B”; b) the condensation copolymer obtained under a) is further melt together with the two polymers C and D to be homogenized, or melt processed as an interlayer between the two molten polymers.
REFERENCES:
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Polypropylene/Polar Polymer Blends, 2244 Research Disclosure, (1991), Oct., No. 330.
Creton et al, MACROMOLECULES, 25, 1992, pp. 3075-3088, Failure Mechanisms of Polymer Interfaces Reinforced with Block Polymers.
Anastasiadis et al, MACROMOLECULES, 22, 1989, pp. 1449-1453, Compatibilizing Effect of Block Copolymers Added to the . . .
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Baidak Alexandre
Brassine Christine
Liegeois Jean-Marie
Ouhadi Trazollah
Asinovsky Olga
Jacobson & Holman PLLC
Universite de Liege
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