Block polymers and cosmetic compositions and processes...

Details Block polymers and cosmetic compositions and processes... Block polymers and cosmetic compositions and processes...

2011-03-29

2011-03-29

Cheung, William K (Department: 1762)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S294000, C525S296000, C525S301000, C525S302000, C525S308000, C526S201000, C526S307600, C526S307700, C526S328000, C526S328500, C526S330000

Reexamination Certificate

active

07915347

ABSTRACT:
The present invention relates to novel block polymers comprising at least one first block and at least one second block that are incompatible with each other, have different glass transition temperatures (Tg), and are linked together via an intermediate segment comprising at least one constituent monomer of the at least one first block and at least one constituent monomer of the at least one second block. The block polymer has a polydispersity index I of greater than 2. The invention also relates to cosmetic compositions comprising the block polymers and processes for their use.

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