POLYESTER POLYOL RESINS COMPOSITIONS
A composition of polyester polyol resins comprising a mixture of α,α-branched alkane carboxylic glycidyl esters derived from butene oligomers characterized in that the sum of the concentration of the blocked and of the highly branched isomers is maximum 55%, preferably below 40%, and most preferably below 30% weight on total composition.
1 . A polyester polyol resin composition comprising a mixture of α,α-branched alkane carboxylic glycidyl esters wherein a sum of a concentration of blocked and of highly branched isomers is a maximum amount of 55 wt % based on the total weight of the mixture.
2 . The composition of claim 1 wherein the mixture of α,α-branched alkane carboxylic glycidyl esters is based on a neononanoic (C9) acid mixture wherein the sum of the concentration of the blocked isomers and of the highly branched isomers is a maximum amount of 55 wt % based on the total weight of the mixture.
3 . The composition of claim 2 wherein the mixture of α,α-branched alkane carboxylic glycidyl esters comprises 2,2-dimethyl heptanoic acid glycidyl ester, or 2-methyl 2-ethyl hexanoic acid glycidyl ester or 2-methyl 2-ethyl 3-methyl pentanoic acid glycidyl esters.
4 . The composition of claim 2 wherein the mixture of α,α-branched alkane carboxylic glycidyl esters comprises 2-methyl 2-ethyl 3-methyl pentanoic acid glycidyl ester stereoisomers in an amount below 40 wt % based on the total weight of the mixture.
5 . The composition of claim 2 wherein the mixture of α,α-branched alkane carboxylic glycidyl esters comprises 2-methyl 2-ethyl hexanoic acid glycidyl ester in an amount above 10 wt % based on the total weight of the mixture.
6 . The composition of claim 2 wherein the mixture of α,α-branched alkane carboxylic glycidyl esters comprises 2,2-dimethyl heptanoic acid glycidyl ester, 2-methyl 2-ethyl hexanoic acid glycidyl ester and 2-methyl 2-ethyl 3-methyl pentanoic acid glycidyl ester stereoisomers in an amount above 40 wt % based on the total weight of the mixture.
7 . The composition of claim 2 wherein the mixture of α,α-branched alkane carboxylic glycidyl esters comprises 2,2-dimethyl heptanoic acid glycidyl ester in an amount of 1 to 15 wt %, 2 methyl 2-ethyl hexanoic acid glycidyl ester in an amount of 40 to 70 wt % and 2-methyl 2-ethyl 3-methyl pentanoic acid glycidyl ester stereoisomers in an amount of 8 to 32 wt % based on the total weight of the mixture.
8 . The composition of claim 2 wherein the mixture of α,α-branched alkane carboxylic glycidyl esters comprises 2,2-dimethyl heptanoic acid glycidyl ester in an amount of 2 to 10 wt %, 2-methyl 2-ethyl hexanoic acid glycidyl ester in an amount of 47 to 61 wt % and 2-methyl 2-ethyl 3-methyl pentanoic acid glycidyl ester stereoisomers in an amount of 10 to 25 wt % based on the total weight of the mixture.
9 . The A process to prepare the polyester polyol resin composition of claim 1 comprising reacting a polycarboxylic acid compound and the mixture of the α,α-branched alkane carboxylic glycidyl esters, wherein the polycarboxylic acid compound is obtained by a polycondensation reaction of one or more multifunctional polyol with one or more anhydride or acid anhydride.
10 . The process of claim 9 wherein the polyester polyol resin composition has an acid value lower than 20 mg KOH/g on solids.
11 . The process of claim 9 wherein the polyester polyol resin composition has a number average molecular weight (Mn) between 500 and 7000 Dalton according polystyrene standard or has an hydroxyl value between 40 and 320 mg KOH/g on solids.
12 . A binder composition useful for a coating composition comprising the polyester polyol resin composition of claim 1 .
13 . A metal or plastic substrate coated with a coating composition comprising the binder composition of claim 12 .
14 . The binder composition of claim 12 wherein the coating composition comprises 10 to 40 weight % of aliphatic isocyanate, 5-25 weight % of the polyester polyol resin composition of claim 1 , and 65-40 weight % acrylic polyol, all weight % based on solid material after evaporation of the solvents.
15 . The polyester polyol resin composition of claim 1 prepared in presence of an acrylic polyol.
16 . A reaction product of a secondary alcohol and maleic anhydride which has been subsequently reacted with the polyester polyol resin composition of claim 1 .
17 . A polyester-ether resin comprising a reaction product of the polyester polyol resin composition of claim 1 and dimethylol propionic acid.
18 . A polyester based powder coatings composition comprising 1-20 wt % of the polyester polyol resin composition of claim 1 .
19 . The composition of claim 1 wherein the sum of the concentration of the blocked isomers and of the highly branched isomers is below 40 wt % based on the total weight of the mixture.
20 . The composition of claim 1 wherein the sum of the concentration of the blocked isomers and of the highly branched isomers is below 30 wt % based on the weight of the mixture.
21 . The composition of claim 2 wherein the sum of the concentration of the blocked isomers and of the highly branched isomers is below 40 wt % based on the total weight of the mixture.
22 . The composition of claim 2 wherein the sum of the concentration of the blocked isomers and of the highly branched isomers is below 30 wt % based on the total weight of the mixture.
23 . The composition of claim 4 wherein the mixture of α,α-branched alkane carboxylic glycidyl esters comprises 2-methyl 2-ethyl 3-methyl pentanoic acid glycidyl ester stereoisomers in an amount below 30 wt % based on the total weight of the mixture.
24 . The composition of claim 4 wherein the mixture of α,α-branched alkane carboxylic glycidyl esters comprises 2-methyl 2-ethyl 3-methyl pentanoic acid glycidyl ester stereoisomers in an amount below or equal to 25 wt % based on the total weight of the mixture.
25 . The composition of claim 5 wherein the mixture of α,α-branched alkane carboxylic glycidyl esters comprises 2-methyl 2-ethyl hexanoic acid glycidyl ester in an amount above 30 wt % based on the total weight of the mixture.
26 . The composition of claim 5 wherein the mixture of α,α-branched alkane carboxylic glycidyl esters comprises 2-methyl 2-ethyl hexanoic acid glycidyl ester in an amount above 45 wt % based on the total weight of the mixture.
27 . The composition of claim 6 wherein the mixture of α,α-branched alkane carboxylic glycidyl esters comprises 2,2-dimethyl heptanoic acid glycidyl ester, 2-methyl 2-ethyl hexanoic acid glycidyl ester and 2-methyl 2-ethyl 3-methyl pentanoic acid glycidyl ester stereoisomers in an amount above 55 wt % based on the total weight of the mixture.
28 . The composition of claim 6 wherein the mixture of α,α-branched alkane carboxylic glycidyl esters comprises 2,2-dimethyl heptanoic acid glycidyl ester, 2-methyl 2-ethyl hexanoic acid glycidyl ester and 2-methyl 2-ethyl 3-methyl pentanoic acid glycidyl ester stereoisomers in an amount above 65 wt % based on the total weight of the mixture.
29 . The composition of claim 1 wherein the mixture of α,α-branched alkane carboxylic glycidyl esters is derived from butene oligomers.