Diamino-alcohol compounds, their manufacture and use in high solids mineral slurries
View Patent ↗A new class of compounds, namely diamino alcohols, is described, along with a process for their production and their use as rheology modifiers in high solids mineral slurries, such as, kaolin clay slurries.
1. A mineral slurry comprising:
(a) 40 to 55% by weight water;
(b) 45 to 58% by weight of a solid particulate clay material; and
(c) present in an effective amount to stabilize at up to 2% by weight of a diamino alcohol compound having the formula:
wherein R is independently hydrogen, alkyl, aryl, or —CH 2 OH; R 1 is independently hydrogen, alkyl, or —CH 2 OH; alternatively, R and R 1 may be linked together to form a cycloalkyl; R 2 is independently hydrogen, methyl, alkyl, phenyl R 3 is independently hydrogen, alkyl, phenyl phenyl, or —CH 2 OH; R 4 is independently hydrogen, alkyl, or —CH 2 OH; and alternatively, R 3 and R 4 may be linked together to form a cycloalkyl; and
wherein all weight percents are based on the total weight of the mineral slurry.
2. The mineral slurry according to claim 1 , wherein the clay comprises kaolin clay.
3. The mineral slurry according to claim 1 , wherein R, R 1 , R 2 , R 3 and R 4 are each methyl.
4. The mineral slurry according to claim 1 , wherein R, R 1 , R 3 and R 4 are each methyl, R 2 is phenyl.
5. A method for preparing a mineral slurry having greater than 50% by weight solids content, based on the total weight of the mineral slurry, said method comprising combining:
(a) 40 to 55% by weight water;
(b) 45 to 58% by weight of a solid particulate clay material; and
(c) present in an effective amount to stabilize at up to 2% by weight of a diamino alcohol compound having the formula:
wherein R is independently hydrogen, alkyl, aryl, or —CH 2 OH; R 1 is independently hydrogen, alkyl, or —CH 2 OH; alternatively, R and R 1 may be linked together to form a cycloalkyl; R 2 is independently hydrogen, methyl, alkyl, phenyl R 3 is independently hydrogen, alkyl, phenyl phenyl, or —CH 2 OH; R 4 is independently hydrogen, alkyl, or —CH 2 OH; and alternatively, R 3 and R 4 may be linked together to form a cycloalkyl; and
wherein all weight percents are based on the total weight of the mineral slurry.
6. The method according to claim 5 , wherein R, R 1 , R 3 and R 4 are each methyl and R 2 is hydrogen.
7. The method according to claim 5 , wherein R, R 1 , R 3 and R 4 are each methyl, R 2 is phenyl.