Polycyclic ring-opened polymers
OwnerWilliam J. Baileyinventor
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Abstract
This invention relates to the process and the product by process of the polymers formed by the polymerization of polycyclic ring-opening monomers. More particularly, this invention relates to the novel process and product by process of polymers that are produced with near zero shrinkage or expansion during polymerization and are immediately useful for production of strain-free composites, high strength adhesives, precision castings, binders for propellants and as additives to other monomer mixtures to produce a mixture that controls the amount of shrinkage or expansion upon polymerization.
Claims20
A method of preparing a polymerizate from a monomer which undergoes essentially zero shrinkage or expansion during the formation of said polymerizate which comprises reacting a monomer characterized by two ring nuclei both of which open to form only one new polymer bond, said nuclei being composed solely of carbon and oxygen atoms, in the presence of a polymerization catalyst under polymerization conditions for a period of time sufficient to produce said polymerizate.
In a process for producing a polymerizate by the condensation polymerization or addition polymerization of monomer or prepolymer reactant in the presence of a polymerization catalyst therefor, said reactant having the characteristic to undergo shrinkage during the formation of said polymerizate, the improvement which comprises admixing a cyclic monomer with said reactant to form a polymerizate containing said reactant and said cyclic monomer as chemically combined constituents thereof, said polymerizate being characterized by a decrease in the amount of shrinkage during its formation, said cyclic monomer possessing two ring nuclei both of which open during the polymerization reaction to form only one new polymer bond, said nuclei being composed solely of carbon and oxygen atoms.
Dependencies are inferred from the claim text.