1966

The invention comprises compounds of the formula <1048906><1048906><1048906><1048906><1048906><1048906><1048906>

LE PROPRIETATES IMPERMEABILISATORI DE 2-CYANOACRYLATO METHYLIC USATE COMO AGENTE ADHESIVE IN LE DENTISTERIA.—Le proprietates impermeabilisatori de adhesive 2-cyanoacrylato methylic esseva comparate con illos de varie materiales de cementation que es currentemente usate in le dentisteria. 2-cyanoacrylato methylic, cemento a phosphato de zinc, cemento a oxydo de zinc e eugenol, e cemento Grip esseva usate in cementar applicatos plastic a platte superficies de 36 extrahite dentes human.

In order to study structure-tissue reactivity relationships and ultimately develop a less necrotizing adhesive, this laboratory undertook a study of the synthesis and degradation of the homologous series of α-cyanoacrylate monomers and polymers. A method for synthesizing high purity cyanoacrylates and some of their chemical and physical properties and presented. In vitro kinetics studies under heterotgeneous and homogeneous conditions indicate that cyanoacrylate polymers degrade by hydrolytic scission of the polymer chain.

This invention relates to alpha-cyanoacrylate adhesive compositions and bonds formed therefrom. More particularly, our invention is concerned with adhesive formulations comprising monomeric esters of alpha-cyanoacrylic acid and vinyl aromatic compounds for bonding metallic or non-metallic surfaces to themselves or to each other and otherwise providing a superior bonded article.

Propellant performance is a fucntion of propellant density. The importance of propellant density with its effect on the range and payload is exemplified by various volume limited missiles. The direction of past efforts to obtain such high density systems has been through the replacement of the oxidizer by more dense ingredients. This approach has always resulted in severe reduction in specific impulse in the more dense system. Additionally other problems were numerous.