Use Of Poly(Oxyalkylene)Oxy- And/Or Poly(Oxyalkylene)Aminoalkyltrialkoxysilanes As Dispersants

摘要

Poly(oxyalkylene)oxy- and/or poly(oxyalkylene)aminoalkyltrialkoxysilanes are of the general formula (I);;where
—X— is —O— or —N(R4)2-a—;—Y— is —CH2—;—Z— is —O—(CH2)d—C(R5)2-c—;a is 1 if —X—═—O—, and is 1 or 2 if —X—═—N(R4)2-a—;b is 0 or 1;c is 0, 1 or 2;d is 0 or 1;m is independently from an integer from 1 to 6;p is a number from 7 to 200;R1 is independently methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, or phenyl;R2 is H or methyl;R3, R4, and R5 are independently H or linear or branched C1-C6-alkyl;R6 is independently H, methyl or ethyl; andR7 is H, linear or branched C1-C6-alkyl, linear or branched C1-C10-alkanoyl, or C6-C10-aryloyl;

as dispersants for aqueous suspensions composed of aggregates and hydraulic binders, and to aqueous suspensions. Also provided: a process for preparing the alkyltrialkoxysilanes.

主权项

1. A poly(oxyalkylene)oxy- and/or poly(oxyalkylene)aminoalkyltrialkoxysilane of the general formula (I) as dispersant for aqueous suspensions composed of an aggregate and a hydraulic binder, where the symbols and indices in the formula (I) have the following definitions: —X— is —O— or —N(R4)2-a—; —Y— is —CH2—; —Z— is —O—(CH2)d—C(R5)2-c—; a is 1 if —X—═—O—, and is 1 or 2 if —X—═—N(R4)2-a—; b is 0 or 1; c is 0, 1 or 2; d is 0 or 1; m is selected independently from an integer from 1 to 6; p is a number from 7 to 200; R1 is identical or different and selected from the group consisting of methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, and phenyl; R2is H or methyl; R3, R4, and R5 are each identical or different and selected independently from the group consisting of H and linear or branched C1-C6-alkyl; R6is identical or different and selected independently from the group consisting of H, methyl and ethyl; and R7is selected from the group consisting of H, linear or branched C1-C6-alkyl, linear or branched C1-C10-alkanoyl, and C6-C10-aryloyl.