This invention is directed to a fast curing polymer composition which does not require baking or thermosetting to provide a cross-linked coating binder. The composition comprises a polymer which is a homopolymer or copolymer of alpha, beta unsaturated monomers having pendent acetylenic groups which cross-link upon air drying to provide a coating binder.
The thermal degradation of poly(allyl methacrylate) has been investigated using thermal volatilisation analysis (TVA), thermogravimetric analysis (TGA) and differential thermal analysis (DTA). The main pyrolysis products have been identified and the characteristics of the reactions deduced and discussed. Mechanisms have been proposed to account for the products formed.
I-Adamantylmethyl 2-cyanoacrylate (1) was prepared by the reaction of 2-cyanoacryloyl chloride with 1-adamantylmethanol . 1,10-Decanediol bis-2-cyanoacrylate (2) was synthesized by transesterification of methyl 2-cyanoacrylate with 1,10-decanediol. Esters1 and2 were studied by X-ray structural analysis.
Prepn. of methyl alpha-cyanoacrylate comprises reacting methyl cyanoacetate with HCHO in a solvent of a poly(ethylene glycol)di-acetate, dipropionate, or dibutyrate, having a number average molecular wt. of 200-400. The formed polymer is then depolymerised to the monomeric prod. the purity of yield is 96% or better.
Alicyclic mono and diacrylates from alpha-pinene and beta-pinene were synthesised and characterized spectroscopically. They were compounded in alkyl 2-cyanoacrylate adhesives as crosslinkers. Their effect on the adhesive bond strengths after exposing the adhesive bonds to various temperatures, was studied.
A curable cyanoacrylate adhesive composition intended for medical and/or veterinary uses is sterilized in liquid form by gamma irradiation. The composition comprises
a) a cyanoacrylate monomer
b) a combination of an anionic stabilizer in amounts effective to stabilize the composition during storage prior to cure, wherein the free radical stabilizer is a selected phenolic antioxidant (but not including hydroquinone).
Alicyclic mono and diacrylates from alpha-pinene and beta-pinene derivatives were synthesised and characterized spectroscopically. They were then compounded in alkyl 2-cyanoacrylate adhesives as crosslinkers. Their effect on the adhesive bond strengths after exposing the adhesive bonds to various temperatures, was studied.
A process for enhancing the security of implantable surgical devices secured to bone tissue comprising implanting in bone tissue a surgical device with a biocompatible adhesive and/or sealant selected from the group consisting of: p1 (a) a material made from monomers of the formula:
A cyanoacrylate adhesive composition, which contains esters in which an alcohol residue thereof includes a dipentaerythritol residue and an acid residue thereof is an acrylic or methacrylic acid residue, and which composition is improved in adhesion performance under high temperature and humid conditions, namely moisture and thermal resistance.
It has passed 38 years since instant adhesives were first introduced to the global market in 1957. Today, instant adhesives are used in a variety of applications for industrial, medical, and general domestic purpose. The main reason that usage fields of instant adhesives have expanded can be found on its ease of use, which is one-part adhesive and bonds any materials strongly and instantaneously at room temperature.
