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
2005-12-09
2008-12-30
Mullis, Jeffrey C (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S271000
Reexamination Certificate
active
07470746
ABSTRACT:
Mixtures comprising linear block copolymers composed of vinylaromatic monomers and dienes of the structure (I) S1-B1-S2and (II) B2-S3, where S1is a block composed of vinylaromatic monomers whose number-average molar mass Mnis in the range from 40 000 to 100 000 g/mol, each of S2and S3is a block composed of vinylaromatic monomers whose number-average molar mass Mnis in the range from 5000 to 20 000 g/mol, each of B1and B2is one or more blocks composed of dienes or is copolymer blocks composed of dienes and vinylaromatic monomers whose number-average molar mass Mnis in the range from 15 000 to 100 000 g/mol, and the ratio of block copolymers (I)/(II) is in the range from 0.5 to 10, and their use for impact-modification of blends using polystyrene.
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Knoll Konrad
Koch Jürgen
Merkel Peter
Wagner Daniel
BASF SE
Connolly Bove & Lodge & Hutz LLP
Mullis Jeffrey C
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