Abstract:
An etheramine mixture comprising of at least one amine selected from the group consisting of amine of Formula (I) and amine of Formula (II) wherein R 1 -R 12 are independently selected from H, alkyl, cycloalkyi, aryl, alkylaryl, or arylalkyi, wherein at least one of R 1 -R 6 and at least one of R 7 -R 12 is different from H, and wherein Z 1 -Z 3 are linear CH 2 CH 2 CH 2 N H 2 .
Abstract:
Methods for controlling the cure time of curable epoxy compositions include selecting an aromatic carboxylic acid accelerator that has a log P value in the range of from -0.5 to 4.0, where P is the partition coefficient. The curable epoxy compositions are essentially free of water and include an aromatic epoxy resin, an amine curing agent and the accelerator. When the amine curing agent is an aliphatic or cycloaliphatic amine, the curable composition cures in less than 1 hour at room temperature. When the amine curing agent is an aromatic amine, heat is applied to effect curing.
Abstract:
A curable resin composition containing: (a) at least one resin; and (b) curative selected from the group consisting of (i) a mixture of at least one low temperature curative and at least one high temperature curative or (ii) a curative that has a low temperature curative part and a high temperature curative part wherein the amount of the low temperature curative is sufficient to cause enough resin-curative addition reaction to effect B-staging in the full resin-curative formulation, the amount of the high temperature curative is sufficient to cause the resin to cure catalytically but insufficient to cause resin-curative addition reaction in the final cure, and the ratio of the resin (a) to the curative (b) is greater than or equal to about 5. The present composition may be used to make prepregs for automotive or aerospace application.
Abstract:
Provided are epoxy compositions comprising a cucurbituril in complex with a curative, and methods for curing the epoxy composition. The curative is reactive with an epoxy compound, and the curative may be a cure accelerator or a cure hardener. The invention also provides cured resins obtained or obtainable from the epoxy compositions. Also provided are complexes of a cucurbituril with a curative.
Abstract:
Epoxy compounds that are bisanhydrohexitol derivatives (i.e., isosorbide derivatives, isomannide derivatives, isoidide derivatives, or mixtures thereof) having two terminal oxirane groups are provided. Additionally, curable compositions that include these epoxy compounds, cured compositions prepared from the curable compositions, and articles containing the cured compositions are described. The cured compositions can be used, for example, as a structural adhesive or as a coating.
Abstract:
Disclosed herein are compositions including (a) a first component comprising (1) an epoxy-adduct that is the reaction product of reactants comprising a first epoxy compound, a polyol, and an anhydride and/or a diacid and (2) a second epoxy compound; (b) rubber particles having a core/shell structure and/or graphenic carbon particles; and (c) a second component that chemically reacts with the first component at ambient or slightly thermal conditions. Also disclosed herein are compositions including (a) an epoxy-capped flexibilizer; (b) a heat-activated latent curing agent; and optionally (c) rubber particles having a core/shell structure and/or graphenic carbon particles; (d) an epoxy/CTBN adduct; and/or (e) an epoxy/dimer acid adduct.
Abstract:
The present invention relates to an etheramine mixture containing a monoether diamine and its method of production by alkoxylating an initiator with an alkylene oxide to produce a precursor polyol and reductively aminating the precursor polyol to form the etheramine mixture. The etheramine mixture may be used in variety of applications including as a curing agent for an epoxy resin or as a reactant in the production of polyurea.
Abstract:
Polymers having dual functionalities, where one functionality imparts the polymer with the ability to crosslink with a crosslinking agent and the other functionality imparts at least one beneficial property to the polymer. In one embodiment, the two functionalities are epoxy and hydroxy-functionalities.