Method, composition and product produced by delayed gelation in the polymerization of cycloolefins
AssigneeHercules Incorporated
InventorDouglas R. Leach
Life of this patent
Estimating the term…
Abstract
A composition and method for polymerization of cycloolefins using a feed stream including dialkylaluminum iodide and the cross-linked polymer produced. The polymer product may be formed by polymerization in an intricately shaped mold and/or be of ultra-low density. A trialkylaluminum compound or a dialkylaluminum chloride are preferably included with dialkylaluminum iodide.
Claims53
A low solvent feed composition for polymerization of cyclic olefin having less than one percent of noncycloolefin solvent on a molar basis, comprising:
- (a) at least one cyclic olefin;
- and
- (b) an activator mixture comprising a dialkylaluminum iodide.
A method of making substantially cross-linked polymerized cyclic olefin, comprising:
- (a) providing a polymerization mixture comprising
- (i) at least one cyclic olefin,
- (ii) a catalyst,
- (iii) an activator mixture comprising dialkylaluminum iodide, and
- (b) polymerizing said polymerization mixture to form substantially cross-linked polymerized cyclic olefin.
A substantially cross-linked thermoset polymeric composition comprising:
- (a) substantially cross-linked polymerized units of at least one cyclic olefin, and
- (b) a dialkylaluminum iodide.
A cross-linked thermoset polymerized dicyclopentadiene foam composition having a density of 0.18 g/ml or less comprising polymerized units of dicyclopentadiene.
A method of mold filling for polymerization of cyclic olefin to form cross-linked cyclic olefin comprising:
- (a) providing a polymerization mixture comprising
- (i) cyclic olefin;
- (ii) activator comprising dialkylaluminum iodide;
- and
- (b) conveying said polymerization mixture to mold means, and allowing said mixture to polymerize to form a molded product.
A low solvent metathesis catalysis activator composition comprising:
- (a) two molar percent of less solvent;
- and
- (b) an activator said activator comprising a dialkylaluminum iodide and a trialkylaluminum or a dialkylaluminum chloride and a polycyclo-olefin and not more than 3% by weight of non-cycloolefin solvent.
Dependencies are inferred from the claim text.