Patent

A primer comprising an organometallic compound and an organic polymer, which is useful in bonding non-polar or highly crystalline resin substrates together or bonding said resin substrates and another material, such as a solid material, a coating material, paint or printing ink by using a 2-cyanoacrylate.

A sterile or non-sterile flavored monomeric adhesive composition includes a flavoring additive and a monomer. The composition can be applied, for example, to skin or the inside of the mouth. A method of making a sterile, flavored adhesive composition includes placing a mixture of a polymerizable adhesive monomer and a flavoring additive in a container, sealing the container, and sterilizing the mixture and the container. The flavored adhesive composition is particularly useful as a medical adhesive and can include 1,1 -disubstituted ethylene monomers, such as -cyanoacrylates.

An adhesive composition that contains cyanoacrylate monomers and cyclic or alkyl- or phenyl-terminated linear polydimethylsiloxane is particularly useful in applications requiring flexibility and elasticity. A method of removing, reducing or preventing scar tissue including applying an adhesive composition that contains cyanoacrylate monomer and cyclic or alkyl- or phenyl-terminated linear polydimethylsiloxane.

This invention relates to a new pyrazolo-pyrimidines and a process for their preparation. More particularly the invention concerns hydro-pyrazolo (3,4-d) pyrimidines having the nucleus of the formula

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which contain at least one of the positions 4 and 6 an oxo group and are alkylated, oxyalkylated, e.g. oxyethylated or cycloalkylated at at leats one ring nitrogen atom, their tautomeric forms and salt thereof.

Gap-filling cyanoacrylate adhesives containing cyanoacrylate esters and organic halogenated polymers with a K-value of at least 46.

Adhesive composition comprising: A. at least one monomeric ester of 2-cyanoacrylic acid, and B. at least one polymerisation initiator selected from caffeine and theobromine

A 2-cyanoacrylate composition useful as an adhesive contains a Lewis acid metal salt comprising a metal such as aluminum, gallium, indium or thalium, and the conjugate base of an acid such as a monohalo-, dihalo- or trihalo-acetate (e.g. aluminum trifluoroacetate salt). A clathrate such as a crown ether is also present.

A 2-cyanoacrylate composition useful as an adhesive contains a Lewis acid metal salt comprising a metal such as aluminum, gallium, indium or thalium, and the conjugate base of an acid such as a monohalo-, dihalo- or trihalo-acetate (e.g. aluminum trifluoroacetate salt). A clathrate such as a crown ether is also present.

An adhesive composition consisting essentially of (A) an alkyloxyalkyl 2-cyanoacrylate represented by the formula

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Alpha-cyanoacrylate adhesive compositions each of which comprise a alpha-cyanoacrylic ester and a diacrylic ester compound or dimethacrylic ester compound which is added to the former ester and adhesives prepared from said composiiton having very excellent heat-resisitance.