C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/216, 260/322
C08F 22/40 (2006.01)
Patent
CA 1305488
64693-4051 ABSTRACT Thermoset products are prepared by polymerizing (A) at least one thermosettable compound which contains simultaneously in the same molecule only one maleimide or substituted maleimide group which groups are represented by the formula Image wherein each R and R1 is independently hydrogen or a hydrocarbyl group having from 1 to 3 carbon atoms; and only one cyanate group such as 3-(2,5-dihydro-2,5-dioxo- 34,329-F 1H-pyrrol-1-yl) phenyl cyanate, and optionally (B) at least one of (1) at least one aromatic polycyanate such as bisphenol A dicyanate; (2) at least one polymaleimide such as N,N'-(methylenedi-p-phenylene)bismaleimide; (3) at least one material having an average of more than one vicinal epoxide group per molecule such as a diglycidyl ether of bisphenol A; (4) at least one polymerizable ethylenically unsaturated material such as styrene; or (5) a mixture of any two or more of components 1-4 in any combination. Thermosettable compositions containing (A) and optionally (B) are useful, for example, for preparing castings, laminates and coatings. Many of the compositions of the present invention possess improved mechanical properties, improved moisture resistance and improved processability.
538136
Smart & Biggar
The Dow Chemical Company
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