Gel concentrate and method for increasing polymer load of a gel mineral oil without increasing viscosity beyond useful levels
This invention is a hydrocarbon gel concentrate containing a high polymer load and a polar compound. The method of the present invention allows for increasing polymer load of a mineral oil gel through the addition of a polar compound as a processing aid during gel formation such that the viscosity of the resulting hydrocarbon gel concentrate is mixable at processing temperature, thereby allowing dilution of the hydrocarbon gel concentrate with additional hydrocarbon oil.
1 . A concentrated gelled composition comprising:
a first component comprising about 0 to 99 weight percent of one or more liquid hydrocarbons;
a second component comprising about 10 to 20 weight percent of one or more gelling agents;
and a third component comprising about 1 to 80 weight percent of one or more polar hydrocarbons.
2 . The composition of claim 1 , wherein the gelling agents are comprised of one or more polymers.
3 . The composition of claim 2 , wherein the polymers are composed of at least one styrenic block copolymer.
4 . The composition of claim 3 , wherein the styrenic block polymers are a combination of diblock and triblock copolymers.
5 . The composition of claim 1 wherein the liquid hydrocarbons are aliphatic or alicyclic.
6 . The composition of claim 5 , wherein the liquid aliphatic or alicyclic hydrocarbons are mineral oil.
7 . The composition of claim 1 , wherein the one or more polar hydrocarbons are selected from a list of amides, acids, alcohols, keytones, aldehydes, amines, esters, ethers, and mixtures thereof.
8 . The composition of claim 7 , wherein the one or more polar hydrocarbons are selected from a list including isopropyl palmitate, cetyl ester, and hexyl amine.
9 . The composition of claim 1 , further including an antioxidant.
10 . A method for reducing the viscosity of a gel containing a high concentration of gellant polymers, wherein a polar hydrocarbon is added to the gellant polymers and an effective amount of one or more liquid aliphatic or alicyclic hydrocarbons is added to allow further dilution with additional liquid aliphatic or alicyclic hydrocarbons to a desired final concentration.
11 . The method of claim 10 , including the step of adding additional liquid alicyclic or aliphatic hydrocarbons to the gel containing a high concentration of gellant polymers at an effective processing temperature.
12 . The method of claim 11 , wherein the preferred processing temperature is about 25° C. to 125° C., depending on environmental conditions and specific composition of the hydrocarbon gel.
13 . The method of claim 12 , including a means for removing the polar hydrocarbons from the desired final concentration.
14 . A method comprising combining a hydrocarbon gel oil with at least one gellant, said gellant being in sufficient concentration that the resulting hydrocarbon gel would be too stiff to be mixable; and adding an effective amount of at least one polar component to the hydrocarbon oil and gellant while the gel is forming, whereby the resulting hydrocarbon gel concentrate is mixable at normal processing temperatures.