Cardanol based dimers and uses therefor
AssigneeCardolite Corporation
InventorsZhisheng Dai, Adarsh Dalal, Donald C. Lawson, III, Jinbao He
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Abstract
Cardanol based dimers are provided. The cardanol dimers are formed by hydrosylylation with silanes. Cardanol based dimers may be further reacted to form epoxy curing agents and epoxies which can be used as anti-fouling coatings on ship hulls and marine structures. The cardanol dimers may also be used to produce friction particles or phenolic resins. Methods of synthesizing the cardanol based dimers, the epoxy curing agents and the epoxies are also provided.
Claims12
A compound for use as a curing agent for an epoxy having a formula selected from the group consisting of:
- where n is between 5 and 200, and R is any saturated, unsaturated, branched, unbranched or aromatic carbon.
A process for producing a cardanol dimer based epoxy curing agent comprising the steps of:
- (a) combining cardanol and acetic anhydride in a reactor and maintaining the reactor at a temperature of between about 120° C. to 125° C. for a period of between about 3 and 4 hours;
- (b) combining the reaction product from step (a) with tetramethyldisiloxane and a catalyst in a reactor and maintaining the temperature at between about 120° C. and about 160° C. for a period of about 20 hours;
- (c) hydrolizing the reaction product from step (b) with an acid solution to produce a silane crosslinked cardanol dimer;
- (d) combining the product from step (c) with paraformaldehyde and an amine in a reactor and maintaining the temperature between about 70° C. and about 80° C. for a period of about 4 to about 6 hours.
Dependencies are inferred from the claim text.