Dispersion

Details Dispersion Dispersion

2007-04-10

2007-04-10

Smith, Duane (Department: 1724)

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C524S804000, C524S808000, C524S818000, C522S006000, C526S263000, C526S265000, C526S313000, C526S315000

Reexamination Certificate

active

10515589

ABSTRACT:
A method of preparing a dispersion which includes the step of contacting a first phase, a first material immiscible therewith, a first polymeric material and a second polymeric material wherein: (a) (i) said first polymeric material has a repeat unit of the formula (I), wherein A and B are the same or different, are selected from optionally-substituted aromatic and thereoaromatic groups and at least one comprises a relatively polar atom or group and R1and R2independently comprise relatively non-polar atoms or groups; (ii) said first polymeric material is prepared or preparable by providing a compound of general formula (I), wherein A, B, R1and R2are as described above, in an aqueous solvent and causing the groups C═C in said compound to react with one another to form said first polymeric material; (b) said second polymeric material includes a functional group which is able to react with said first polymeric material so that covalent bonds are formed between said first and second polymeric materials; (c) the ratio of the weight of said first polymeric material to the weight of said first phase is equal to or less than 0.0025; and (d) the ratio of the weight of said second polymeric material to the weight of said first phase is equal to or less than 0.035.

REFERENCES:
patent: 1 251 240 (2002-10-01), None
patent: 1 251 240 (2003-03-01), None
patent: WO 98/12239 (1998-03-01), None
patent: WO 98 12239 (1998-03-01), None

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