Brush-form alternative copolymer and process for producing...

Synthetic resins or natural rubbers -- part of the class 520 ser – Polymer from ethylenic monomers only – having terminal...

Reexamination Certificate

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C525S911000, C526S072000

Reexamination Certificate

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07429633

ABSTRACT:
The invention is an alternating copolymer, and a method of producing the same, obtained by alternately copolymerizing a vinylbenzyl-terminated polyethylene oxide (or polydimethylsiloxane) and a (meth)acryloyl-terminated polydimethylsiloxane (or polyethylene oxide).The alternating copolymer is a novel amphiphilic brush-shaped alternating copolymer having a structure that is well-suited as an emulsifier or a dispersant for oil and silicone solvents commonly used in cosmetics and pharmaceuticals.

REFERENCES:
patent: 6103837 (2000-08-01), Hiiro et al.
patent: 6677422 (2004-01-01), Coca et al.
patent: 6686432 (2004-02-01), Coca et al.

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