| 摘要 |
A novel cross-linkable liquid crystalline organosiloxane, useful for the production of pigments, is claimed. A cross-linkable liquid crystalline organosiloxane (I) contains units of formula (1) where the group, Mes is of formula (2) or (3) with the proviso that the combination of rings (A) with binding group (B) does not form a phenylester derivative of an aliphatic, aromatic or heteroaromatic carboxylic acid. Independent claims are included for: (i) a process for the production of (I) by reacting an organosilicon compound containing units of formula (4) with a compound of formula (5) and optionally (6). (ii) a process to crosslink (I) by means of a free radical to form a 3-dimensional network; and (iii) the resulting cross-linked product. (RbMescSiO(4-b-c)/z) (1) (CH2)p-(O)q-A-(B-A)r-E-F-VN (2) (CH2)m - (O)n - (A)t - Q - X (3) (RbHcSiO(4-b-c)/z) (4) CH2=CH-(CH2)p-2 - (O)q - A - (B-A)r - E - F - VN (5) CH2=CH-(CH2)m-2 - (O)n - (A)t - Q - X (6) b = 0-2; c = 0-4; b+c <= 4; A = a divalent group, preferably 1,4-cyclohexylene, 4,4'-bicyclohexylene, 1,4-phenylene, 2,6-napthylene, 2,7-napthylene, 2,5-(1,3-dioxarylene) or pyrimidinyl; Q = -COO-, -OCO-, -O-, a chemical bond or -O-(C=O)-O-; X = cholesteryl, dihydrocholesteryl, isosorbidyl, isomannidyl, cholic acid or 1,4-phenylene, 4,4'-biphenylyl, 1,4-cyclohexylene, 4,4'-bicyclohexylene, 4,4'-cyclohexylene phenylene, 2,5-(1,3-dioxarylene) or pyrimidinyl, optionally substituted by 1-5C alkoxy, alkyl, cyano, chlorine or nitro; B = a chemical bond, -O-CH2-, -CH2-O-, -CH2CH2, -CH=CH-, -COO- or -OCO-; E = a chemical bond, -O-, -COO-, -OCO- or -CH F = a chain of 0-11 CH2 groups optionally containing non-neighboring -O-; VN = -COO-CH=CH2, -COO-(CH3)=CH2, -O-CH=CH2, oxirane or -(CH2)n-OCH=CH2; u = 2-8; m,p = 3-7; n,q = 0 or 1; t = 1-3; r = 1-3. |
