Hydroxy aromatic oligomers containing triazine and oxazoline groups and epoxy resins prepared therefrom
AssigneeThe Dow Chemical Company
InventorRobert E. Hefner, Jr.
Life of this patent
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Abstract
The subject oligomers are prepared by reacting a diphenol with a cyanogen halide in the presence of an alkaline agent. The resultant product is then reacted with an epoxy resin thereby producing a hydroxy aromatic oligomers containing triazine and oxazoline groups. An epoxy resin is then prepared by reacting the previously formed oligomers with an epihalohydrin followed by dehydrohalogenation of the resultant product.
Claims18
Hydroxyaromatic oligomer compositions containing both triazine and oxazoline groups prepared by reacting (A) at least one material having an average of more than one aromatic hydroxyl group per molecule with (B) at least 0.01 but not more than 0.95 moles of cyanogen halide or mixture of cyanogen halides per aromatic hydroxyl group in the presence of (C) a suitable base in a quantity of from about 0.01 to about 1.1 moles per aromatic hydroxyl group at a temperature and time sufficient to essentially complete the reaction and thereafter recovering the resultant cyanate mixture;
- (II) co-oligomerizing the product resulting from (I) with (D) an epoxy resin wherein the mole ratio of epoxy groups to cyanate groups is about 1:1 to about 1:100 in the presence of a suitable co-oligomerization catalyst at a temperature and time to essentially complete the co-oligomerization reaction.
An epoxy-containing composition having an average of more than one epoxy group per molecule prepared by dehydrohalogenating the reaction product resulting from reacting an epihalohydrin with a hydroxy aromatic oligomer composition containing both triazine and oxazoline groups prepared by reacting (A) at least one material having an average of more than one aromatic hydroxyl group per molecule with (B) at least 0.01 but not more than 0.95 moles of cyanogen halide or mixture of cyanogen halides per aromatic hydroxyl group in the presence of (C) a suitable base in a quantity of from about 0.01 to about 1.1 moles per aromatic hydroxyl group at a temperature and time sufficient to essentially complete the reaction and thereafter recovering the resultant cyanate mixture;
- (II) co-oligomerizing the product resulting from (I) with (D) an epoxy resin wherein the mole ratio of epoxy groups to cyanate groups is about 1:10 to about 1:100 in the presence of a suitable co-oligomerization catalyst at a temperature and time to essentially complete to co-oligomerization reaction.
Dependencies are inferred from the claim text.