Back to results
US 8,461,351 B2Granted
Sterically bulky stabilizers
AssigneesXerox Corporation, National Research Council of Canada
InventorsRina Carlini, Darren Andrew Makeiff
Life of this patent
Estimating the term…
Abstract
A sterically bulky stabilizer that includes an alkylated-benzimidazolone compound, where the sterically bulky stabilizer is associated non-covalently with a benzimidazolone pigment, and the presence of the sterically bulky stabilizer limits the extent of particle growth and aggregation, to afford nanoscale pigment particles.
Claims3
A sterically bulky stabilizer of the formula:
- wherein each of Ra and Rb independently represent H or substituted or unsubstituted alkyl groups, provided that at least one of Ra and Rb on each benzimidazolone group represents H, and Rc represents a group selected from the group consisting of:
- —X—(CH2)nX—;
- —[(XCH2CH2)n]X—;
- —[(C═O)—(CH2)n—(C═O)]—;
- —X—[(C═O)—(CH2)n—(C═O)]—X—;
- —X—[(C═O)—X—(CH2)n—X—(C═O)]—X—;
- —[(C═O)—X—(CH2)n—X—(C═O)]—;
- wherein X, X1, and X2 independently represent O, S, or NH, and n is an integer of 1 to 50.
5 more elements
A sterically bulky stabilizer comprising an alkylated-benzimidazolone selected from the group consisting of the following compounds:
- Position 5
- functional
- Sterically Bulky Group(s)
- moiety
- X
- R1
- R2
- R3
- NH
- (CH2)nCH3 n = 2, 11, 17
- —
- —
- NH
- —
- —
- NH
- —
- —
- NH
- —
- —
- X1 = X2 = NH
- (CH2)nCH3 n = 11, 17
- —
- —
- X1 = O X2 = NH
- (CH2)nCH3 n = 11, 17
- —
- —
- N
- H
- (CH2)nCH3 n = 1, 17
- —
- N
- H
- —
- N
- (CH2)nCH3 n = 3, 11, 17
- (CH2)nCH3 n = 3, 11, 17
- —
- N
- —
- N
- —
- N
- (CH2)nCH3 n = 1, 17
- (CH2)nCH3 n = 1, 17
- (CH2)nCH3 n = 1, 17
- N
- N
- Position 5
- functional
- moiety
- R1
- R2
- R3
- X1 = X2 = NH
- H
- H
- X1 = O X2 = NH
- H
- H
- X1 = NH
- H
- H
- X1 = O
- H
- H
- X1 = O
- H
- H
- X1 = NH
- H
- H
- —
- H
- —(CH2)nCH3 n = 1, 17
- —
- —
- —(CH2)nCH3 n = 1, 17
- H
- —
- —
- H
- H
- —
- —
- H
- H
- —
- Group X
- Rc
- wherein DCn represents a diazo moiety.
90 more elements
Dependencies are inferred from the claim text.