Aminoalkyl-containing guar derivatives
View Patent ↗A process for producing aminoalkyl-containing guar derivative is disclosed. The process entails a) dispersing a member selected from the group consisting of guar and guar derivative in a mixture of a water-miscible aprotic solvent and water and b) alkalizing the member with a base to obtain a mixture containing an alkalized member and c) etherifying the mixture with an amino-containing reagent to obtained an etherified mixture and d) optionally neutralizing the etherified mixture to obtain a material system containing a reaction product and e) optionally filtering the material system to obtain the reaction product and f) optionally washing the reaction product and g) optionally drying the reaction product referred to in f) and h) optionally grinding the reaction product. The product thus obtained is suitable for producing hair conditioners and flocculation aids.
1. An aminoalkyl-containing guar ether, wherein the guar ether has:
a viscosity of at least 20,000 mPa·s in a 2% solution by weight in water at a shear gradient of 2.55 s −1 ;
a DS(N)>0.3; and
at least one aminoalkyl ether group of the formula:
O—(CH 2 ) n —NR 1 R 2
wherein:
n is an integer greater than 1, and
R 1 and R 2 , independently of one another are H, a C 1-24 radical, or cooperate together with the nitrogen to which they are attached to form a pyrrolidine, piperidine or morpholine ring or a hydrochloride thereof.
2. A quaternized aminoalkyl-containing guar ether of claim 1 , wherein at least one of said aminoalkyl ether group is quaternized and of the formula:
O—(CH 2 ) n —N′(R 1 )(R 2 )—(CH 2 ) n —NR 1 ′R 2 ′
wherein:
n is, at each occurrence, an integer greater than 1, and
R 1 and R 2 , independently of one another are H or a C 1-24 radical, and
R 1 ′ and R 2 ′, independently of one another are H, a C 1-24 radical, or cooperate together with the nitrogen to which they are attached to form a pyrrolidine, piperidine or morpholine ring or a hydrochloride thereof.