Polyhydroxy-diamines as multi-functional additives for paints, coatings and epoxies
View Patent ↗Provided are polyhydroxy-diamine compounds of the formula I: or salt thereof, wherein R 1 , R 2 , and R 3 are as defined herein. The compounds are useful as low additives for paints, coatings and epoxy formulations.
1. A method for enhancing the freeze thaw stability of an aqueous based paint or coating, the method comprising including in the paint or coating:
(a) an effective amount of a compound of formula I:
wherein R 1 and R 2 are independently at each occurrence H, CH 2 OH, C 1 -C 6 alkyl; and R 3 is independently at each occurrence H or C 1 -C 6 alkyl; and
(b) an effective amount of a compound of formula A:
wherein n is 6-60.
2. The method of claim 1 wherein R 1 and R 2 are independently at each occurrence C 1 -C 6 alkyl; and R 3 is independently at each occurrence H or C 1 -C 6 alkyl.
3. The method of claim 1 wherein R 1 at each occurrence is C 1 -C 3 alkyl.
4. The method of claim 1 wherein R 2 at each occurrence is C 1 -C 3 alkyl.
5. The method of claim 1 wherein R 3 at each occurrence is H.
6. The method of claim 1 wherein the compound of formula I is: 2,2′-((2-hydroxytrimethylene)-diimino)bis(2-methyl-1-propanol), 2,2′-(2-hydroxypropane-1,3-diyl)bis(azanediyl)bis(2-methylpropane-1,3-diol), or 2,2′-(2-hydroxypropane-1,3-diyl)bis(azanediyl)dipropane-1,3-diol.