| 摘要 |
Curable compositions, cured compositions, and articles that include the cured compositions are described. The curable composition contains a) an epoxy resin, b) a curing agent, c) a reactive liquid modifier, and d) a toughening agent. The reactive liquid modifier is an acetoacetate ester of a polyol that is a vegetable oil, that is prepared from a vegetable oil, or that is a mixture thereof. The cured compositions can be used as adhesives such as structural adhesives or as polymeric coatings. |
| 主权项 |
1. A curable composition having a first part and a second part, the curable composition comprising:
a) an epoxy resin, wherein the epoxy resin is in the first part of the curable composition; b) a curing agent having at least two groups of formula —NR1H where R1 is selected from hydrogen, alkyl, aryl, or alkylaryl, wherein the curing agent is in the second part of the curable composition; c) a toughening agent, wherein the toughening agent is in the first part, in the second part, or in both the first part and the second part of the curable composition and wherein the toughening agent is a core-shell polymer, a butadiene-nitrile rubber, acrylic polymer or copolymer, an adduct of an amino-terminated material and an epoxy resin, or an adduct of a carboxy-terminated material and an epoxy resin; and d) a reactive liquid modifier that is in the first part of the curable composition, the reactive liquid modifier comprising an acetoacetate ester of a polyol that is a vegetable oil, that is prepared from a vegetable oil, or that is a mixture thereof, wherein the polyol comprises a triglyceride having at least two hydroxyl groups and wherein the acetoacetate ester has at least two acetoacetoxy groups. |
