ROSIN ESTERS FOR NON-WOVEN APPLICATIONS, METHODS OF MAKING AND USING AND PRODUCTS THEREFROM
Rosin esters having suitable color, color stability and/or odor to make them useful for non-woven applications, to non-woven products made from and/or comprising rosin esters, and to methods of making and using such rosin esters and products.
1 . A method of producing a rosin ester, the method comprising:
(A) Contacting a rosin having PAN isomers with disproportionation agent to provide a rosin having a PAN number less than 45 providing a disproportionated rosin;
(B) Contacting the disproportionated rosin with an adduction agent to further reduce the PAN number to provide an adducted rosin;
(C) Contacting the adducted rosin with a polyhydric polyol to form a rosin ester.
2 . The method of claim 1 , wherein the disproportationation agent comprises at least one selected from among phenol sulfides, metals, iodine, iodides, and sulfides, and the adduction agent is selected to react with the PAN isomers of the rosin through a Diels-Alder reaction or an Ene reaction.
3 . The method of claim 1 wherein the disproportationation agent comprises at least one selected from 2,2′-thiobis phenols, 3,3′-thiobisphenols, 4,4′-thiobis(resorcinol) and t,t′-thiobis(pyrogallol), 4,4′-thiobis(6-t-butyl-m-cresol) and 4/4′-thiobis(6-t-butyl-o-cresol) thiobisnaphthols, 2,2′-thio-bis phenols, 3,3′-thio-bis phenols, palladium, nickel, platinum, iodine, iron iodide, iron sulfide.
4 . The method of claim 1 , wherein the adduction agent comprises at least one selected from fumaric acid, maleic anhydride, acrylic acid, unsaturated acids and anhydrides.
5 . The method of claim 1 , wherein the polyhydric polyol comprises less than 20 weight percent pentaerythritol.
6 . The method of claim 5 , wherein the polyhydric polyol comprises at least one selected from the group consisting of ethylene glycol, propylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, trimethylene glycol, glycerol, pentaerythritol, dipentaerythritol, tripentaerythritol, trimethylolethane, trimethylolpropane, mannitol and sorbitol.
7 . The method of claim 5 , wherein the polyhydric alcohol comprises at least one selected from the group consisting of glycerol and trimethylolpropane.
8 . The method of claim 1 , wherein the rosin ester has an odor intensity of less than 80% relative to comparison rosin ester made from 100% pentaerythritol.
9 . A method of producing a rosin ester, the method comprising:
(A) Contacting rosin having a PAN number less than 45 with an adduction agent to further reduce the PAN number to provide an adducted rosin;
(B) Contacting the adducted rosin with a polyhydric polyol to form a rosin ester.
10 . The method of claim 9 , wherein the adduction agent is selected to react with the PAN isomers of the rosin through a Diels-Alder reaction or an Ene reaction.
11 . The method of claim 9 , wherein the adduction agent comprises at least one selected from fumaric acid, maleic anhydride, acrylic acid, unsaturated acids and anhydrides.
12 . The method of claim 9 , wherein the polyhydric polyol comprises less than 20 weight percent pentaerythritol.
13 . The method of claim 12 , wherein the polyhydric polyol comprises at least one selected from the group consisting of ethylene glycol, propylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, trimethylene glycol, glycerol, pentaerythritol, dipentaerythritol, tripentaerythritol, trimethylolethane, trimethylolpropane, mannitol and sorbitol.
14 . The method of claim 12 , wherein the polyhydric alcohol comprises at least one selected from the group consisting of glycerol and trimethylolpropane.
15 . The method of claim 9 , wherein the rosin ester has an odor intensity of less than 80% relative to comparison rosin ester made from 100% pentaerythritol.
16 . A rosin ester composition having an odor intensity of less than 80% relative to comparison rosin ester made from 100% pentaerythritol.
17 . The composition of claim 16 having an odor intensity of less than 60% relative to comparison rosin ester made from 100% pentaerythritol.
18 . The composition of claim 16 having an odor intensity of less than 55% relative to comparison rosin ester made from 100% pentaerythritol.
19 . The composition of claim 16 having an odor intensity of less than 50% relative to comparison rosin ester made from 100% pentaerythritol.
20 . An adhesive comprising a rosin ester composition having an odor intensity of less than 80% relative to comparison rosin ester made from 100% pentaerythritol.
21 . The adhesive of claim 20 wherein the composition comprises an odor intensity of less than 60% relative to comparison rosin ester made from 100% pentaerythritol.
22 . The adhesive of claim 20 wherein the composition comprises an odor intensity of less than 55% relative to comparison rosin ester made from 100% pentaerythritol.
23 . The adhesive of claim 20 wherein the composition comprises an odor intensity of less than 50% relative to comparison rosin ester made from 100% pentaerythritol.
24 . A non-woven product comprising an adhesive comprising a rosin ester composition having an odor intensity of less than 80% relative to comparison rosin ester made from 100% pentaerythritol.
25 . The product of claim 24 wherein the odor intensity is less than 60% relative to comparison rosin ester made from 100% pentaerythritol.
27 . The product of claim 24 wherein the odor intensity is less than 55% relative to comparison rosin ester made from 100% pentaerythritol.
28 . The product of claim 24 wherein the odor intensity is less than 50% relative to comparison rosin ester made from 100% pentaerythritol.