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US 2007/0179277 A1Published application
Rosin ester with low color and process for preparing same
OwnerAnthony Dallaviainventor
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Abstract
A process for producing light color rosins ester resin, preferably based on tall rosin, is described. The process is conducted in the presence of less than 10 weight % of an acid functional organic compound and avoids the need for use of a stoichiometric excess of rosin acid, or a stoichiometric excess of polyol hydroxyl groups. The process allows for the use of lower colored or darker tall oil rosin in the production of low color rosin esters.
Claims22
A process to produce of a rosin ester resin comprising the steps of:
- (a) contacting a molten rosin with a polyol having hydroxyl functionality to form a first reactant mixture;
- and
- (b) contacting the first reactant mixture with an amount of 0.5 to 10 weight %, by weight of all reactants, of an acid functional organic compound selected from the group consisting of aromatic monofunctional acids, aromatic polyfimctional acid, aliphatic monofunctional, aliphatic polyfunctional acids, natural fatty acids, synthetic fatty acids, polymerized rosin, rosin resin, and combinations thereof, to form a final reactant mixture,
- wherein the final reactant mixture does not contain a stoichiometric excess of hydroxyl functionality.
1 more element
A process to produce of a rosin ester resin comprising:
- (a) contacting a molten rosin with an alpha,-beta unsaturated carboxylic acid to form a first reactant mixture;
- (b) contacting the first reactant mixture with a polyol having hydroxyl functionality to form a second reactant mixture;
- and
- (c) contacting the second reactant mixture with an amount 0.5 to 10 weight %, by weight of all reactants, of an acid functional organic compound selected from the group consisting of aromatic monofunctional acids, aromatic polyfunctional acid, aliphatic monofunctional, aliphatic polyfunctional acids, natural fatty acids, synthetic fatty acids, polymerized rosin, rosin resin, and combinations thereof to form a final reactant mixture;
- wherein the final reaction mixture does not contain a stoichiometric excess of hydroxyl functionality.
2 more elements
Dependencies are inferred from the claim text.