Biosourced alkyd resin and method for manufacturing such an alkyd resin
First Claim
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1. An alkyd resin resulting from the polycondensation:
- of at least one polyacid or acid anhydride thereof, wherein the at least one polyacid is chosen from succinic acid, adipic acid, itaconic acid, azelaic acid, sebacic acid, tartaric acid, citric acid, malic acid, or a combination thereof;
of at least one oil or corresponding fatty acid, wherein the at least one oil is chosen from soya oil, sunflower oil, flax oil, tung oil, castor oil, tall oil, or a mixture thereof;
of at least one polyol comprising at least one 1,4;
3,6-dianhydrohexitol unit; and
of a rosin or rosin derivative, wherein the rosin or rosin derivative is chosen from Portuguese gem rosin, abietic acid, or dehydroabietic acid;
wherein the at least one polyacid comprises succinic acid or succinic acid anhydride;
and wherein the percentage by dry weight of the rosin or rosin derivative based on the total dry weight of the succinic acid or succinic acid anhydride and the rosin or rosin derivative is between about 10% and about 80%.
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Abstract
The present invention relates to an alkyd resin as well as to a method for preparing such a resin, said alkyd resin resulting from the polycondensation:
- of at least one polyacid, preferably biosourced, or its acid anhydride preferably biosourced,
- of at least one component based on oil, preferably biosourced, or its corresponding fatty acid, preferably biosourced,
- of at least one polyol, preferably biosourced, having at least two hydroxyl groups, selected from polyols comprising at least one 1,4:3,6-dianhydrohexitol unit,
- of rosin or of at least one of its derivatives,
- wherein at least one polyacid is succinic acid, preferably biosourced, or its anhydride, preferably biosourced;
- and wherein the percentage by dry weight of rosin or its derivatives based on the total dry weight of succinic acid and of its anhydride and of rosin or its derivatives is comprised between about 10% and about 80%.
4 Citations
23 Claims
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1. An alkyd resin resulting from the polycondensation:
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of at least one polyacid or acid anhydride thereof, wherein the at least one polyacid is chosen from succinic acid, adipic acid, itaconic acid, azelaic acid, sebacic acid, tartaric acid, citric acid, malic acid, or a combination thereof; of at least one oil or corresponding fatty acid, wherein the at least one oil is chosen from soya oil, sunflower oil, flax oil, tung oil, castor oil, tall oil, or a mixture thereof; of at least one polyol comprising at least one 1,4;
3,6-dianhydrohexitol unit; andof a rosin or rosin derivative, wherein the rosin or rosin derivative is chosen from Portuguese gem rosin, abietic acid, or dehydroabietic acid; wherein the at least one polyacid comprises succinic acid or succinic acid anhydride; and wherein the percentage by dry weight of the rosin or rosin derivative based on the total dry weight of the succinic acid or succinic acid anhydride and the rosin or rosin derivative is between about 10% and about 80%. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An alkyd resin resulting from the polycondensation of:
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succinic acid or succinic acid anhydride; at least one oil or corresponding fatty acid, wherein the at least one oil comprises soya oil, sunflower oil, flax oil, tung oil, castor oil, tall oil, or a mixture thereof; 1,4;
3,6-dianhydro-D-sorbitol (isosorbide), 1,4;
3,6-dianhydro-D-mannitol (isomannide), or 1,4;
3,6-dianhydro-L-iditol (isoidide); andPortuguese gem rosin or a rosin derivative chosen from abietic acid or dehydroabietic acid; wherein the Portuguese gem rosin or rosin derivative comprises from about 10% to about 80% by dry weight of the total of succinic acid or succinic acid anhydride and Portuguese gem rosin or rosin derivative.
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Specification