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US 9,540,542 B2Granted
Cycloaliphatic resin, method for obtaining the same and its application in a high resistance coating
AssigneeCentro De Investigacion En Polimeros S.A. De C.V.
InventorJaime Cordero-Basave
Life of this patent
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Abstract
There is provided a cycloaliphatic resin, from which it is possible to formulate anticorrosive coatings, using the cycloaliphatic resin alone or as hybrid with epoxy cycloaliphatic resins or hydroxy-functionalized resins; both mixed with amino or aminosilane hardeners. The obtained coatings have superior physical properties of weatherability, gloss retention, toughness and impact resistance.
Claims23
A cycloaliphatic resin obtained by an etherification reaction of a reaction mixture comprising:
- a) an epoxy functional silane with the formula
- where each R1 is independently selected from methyl, methoxy, ethoxy and propoxy, provided that at least one R1 is not methyl;
- “X” is epoxy-cyclohexyl or glycidoxy group;
- and “n” is an integer between 1 and 6;
- and
- b) a hydrogenated bisphenol with formula
- where R2 is methyl, ethyl or hydrogen;
- wherein the etherification reaction involves alcoholysis between a hydroxyl group of b) and a methoxy, ethoxy or propoxy group of a), providing an oxirane end group in the cycloaliphatic resin.
5 more elements
A method for obtaining a cycloaliphatic resin comprising the steps of:
- a) preparing a reaction mixture comprising:
- i) a hydrogenated bisphenol with formula
- where R2 is methyl, ethyl or hydrogen;
- and
- ii) an epoxy-functional silane with the general formula
- where each R1 is independently selected from methyl, methoxy, ethoxy and propoxy, provided that at least one R1 is not methyl;
- “X” is epoxy-cyclohexyl or a glycidoxy group;
- and “n” is an integer between 1 and 6;
- b) heating the blend in a range from 90° C. to 160° C.;
- c) adding an organometallic catalyst to cause an etherification reaction to occur, wherein the etherification reaction involves alcoholysis between a hydroxyl group of i) and a methoxy, ethoxy or propoxy group of ii);
- d) extracting alcohol produced by the etherification reaction;
- and
- e) obtaining a cycloaliphatic resin, wherein the cycloaliphatic resin comprises an oxirane end group.
10 more elements
Dependencies are inferred from the claim text.