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US 4,049,750 AGranted
One component shelf stable low shrinkage structural adhesive systems
OwnerWalter Brennerinventor
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OwnerWalter Brennerinventor
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Novel one component shelf stable low shrinkage structural adhesive systems having controlled viscosity which cure at ambient temperatures in the absence of oxygen and at elevated temperature in the presence or absence of oxygen, with minimal dimensional change are disclosed. These adhesive systems comprise polymerizable vinyl ester polymers prepared by vinyl ester termination of certain polymerizable epoxy resins with methacrylic or acrylic acids, and also polyesters, a chemically compatible ethylenically unsaturated organic liquid monomer particularly styrene, and a catalyst/inhibitor system containing a peroxide type polymerization initiator, accelerators and inhibitors as well as, optionally, thixotropic agents, thickeners, dyes, pigments and other additives which will impart specifically desirable use properties. They are also of value as sealants where high performance is required.
A liquid one component structural adhesive composition having controlled viscosity which is stable at ambient temperatures for an extended time period in the presence of oxygen but cures at ambient temperatures in the absence of oxygen or at elevated temperatures in the presence or absence of oxygen to the solid state with low shrinkage said composition comprising a polyester based on the reaction of bisphenol A with fumaric acid having typically the chemical formula configuration ##STR2## said polymerizable polyester amounting to between 70 - 98% of the adhesive composition, a chemically compatible ethylenically unsaturated organic liquid monomer, a catalyst/inhibitor system containing a peroxide type initiator, accelerators and inhibitors as well as, optionally, thixotropic agents, thickeners, dyes, pigments and other additives which will impart desirable use properties.
Dependencies are inferred from the claim text.