Dispersions containing polyether dispersants

Details Dispersions containing polyether dispersants Dispersions containing polyether dispersants

2005-04-26

2005-04-26

Klemanski, Helene (Department: 1755)

Compositions: coating or plastic

Coating or plastic compositions

Marking

C106S031860, C106S170460, C106S170470, C106S191100, C106S192100, C106S287220

Reexamination Certificate

active

06884286

ABSTRACT:
A dispersion comprising a particulate solid, a polar organic liquid and a dispersant of formula (1) wherein R is optionally substituted C4-50-hydrocarbyl; X is —O—, —S— or —NR2—; R1is hydrogen or C1-6, -alkyl which may be linear or branched; R2is hydrogen or C1-6, alkyl which may be linear or branched or a group —(C2H4O)n(AO)p—R1; AO is alkyleneoxy containing 3 or more carbon atoms; n is 0 to 30; p is 4 to 100; and p>n; and a is from 1 to 3. Preferred compounds are where R1is hydrogen, X is —O— and a is 1 and R is the residue of 2-naphthol.

REFERENCES:
patent: 4923515 (1990-05-01), Koike et al.
patent: 5494511 (1996-02-01), Holbrook
patent: 5663224 (1997-09-01), Emmons et al.
patent: 5785894 (1998-07-01), Schofield et al.
patent: 6440207 (2002-08-01), Schulz
patent: 20020013494 (2002-01-01), Carpenter et al.
patent: 0 343 503 (1989-11-01), None
patent: WO 9844022 (1998-10-01), None

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