Abstract: A one-part, air-activatable, polymerizable composition comprising:(a) at least one free-radically polymerizable monomer, and(b) an activator system for effective polymerization of the free-radically polymerizable monomer, said activator system comprising at least one auto-oxidizable compound of a formula which includes the structure I: ##STR1## where x is 0 or 1, and where the lines representing unfilled valencies indicate bonds to carbon, hydrogen or hetero atoms, alone or in combination with a weak acid;with the proviso that:when x=0, the nitrogen atom in structure I is not bonded to a second nitrogen atom;and when x=1 there is a structure I in the compound in which the >C.dbd.C>moiety does not form part of a phenyl ring;with the proviso that the composition does not contain a peroxide, or a peroxide precursor which produces peroxide in the absence of air or any ingredient which is a significant source of radicals in the absence of air.

Abstract: An apparatus for coating a web by contact with a transfer roll partially immersed in a reservoir of coating material and rotated into resin-transferring contact with the web on a first main web surface thereof. The web in passage away from the transfer roll is contacted on a second main surface of the web, the second main surface being opposite the first main surface of the web, by a medial main cylindrical portion of a stepped squeegee roll comprising a medial main cylindrical portion of a first relatively smaller diameter, and marginal shoulder portions each of a second relatively larger diameter in relation to the diameter of the medial main cylindrical portion. The stepped squeegee roll is tensionally biased toward, but in spaced relationship to the transfer roll, being maintained in tensionally biased relationship by spring or other tensionally biasing means, to limit the coating material thickness on the web.

Abstract: An anaerobically curing composition is comprised of (i) a silicone fluid formed as the reaction product of at least one first silane of formula I:R.sub.n Si(X).sub.4-n (I),wherein the R groups are the same or different and selected from the group consisting of hydrogen, C1-C12 alkyl, C6-C12 aryl, C7-C18 arylalkyl, C7-C18 alkylaryl, haloalkyl, haloaryl and monovalent ethylenically unsaturated radicals excluding (meth)acryloxy functional groups, X is a hydrolyzable functionality, and n is an integer of from 0 to 3, and at least one second silane of formula II:R.sup.1.sub.m R.sup.2.sub.p Si(X).sub.4-(m+p) (II),wherein R.sup.1 is a (meth)acrylic functional group and R.sup.

Abstract: Resin compositions useful for filament winding applications comprising an epoxy component including at least one polyepoxide resin curable by heat, an olefinicially unsaturated monomer component including at least one polyolefinically unsaturated monomer curable by actinic radiation, at least one photoinitiator, at least one organic peroxide, and a heat activated curing agent for epoxides. The compositions have a viscosity less than about 2000 centipoise (cps) and are capable of retaining this viscosity for at least about 2 hours at a temperature of from about ambient temperature to about 60.degree. C. The resins are capable of being immobilized by actinic radiation exposure and further heat cured without substantial resin drip. One or more organic peroxides are employed, selected from the group of organic peroxides having 10 hour decomposition half lives at temperatures of from about 50.degree. C. to less than about 104.degree. C.

Abstract: To remove gas bubbles from a viscous liquid (L) to be dispensed, the liquid (L) is introduced with a first pressure in a thin, broad jet into a sealed chamber (15) which is partially filled with the liquid (L), with the result that the gas bubbles can escape from the introduced liquid. A second pressure, which is lower than the first pressure, prevails in the chamber (15), with the result that gas bubbles present in the liquid expand and burst. The difference between the first pressure, with which the liquid is introduced into the chamber (15), and the second pressure, prevailing in the chamber (15), is constant.

Abstract: A non-drip valve for the discharge of liquid comprises a through-flow channel (2) from whose end the liquid emerges and at least one elastic member (12) within the through-flow channel (2) which reduces its volume when the pressure in the liquid increases and thereby frees the through-flow channel (2) and which enlarges its volume when the pressure of the liquid flow decreases and closes the through-flow channel when the pressure of the liquid flow falls below a certain pressure value.

Abstract: A non-environmentally hazardous, non-volatile adhesive promoter composition useful in promoting the cure and/or enhancing adhesion of adhesives and for use in combination with adhesive bond polymerization. The promoter composition is a combination of a fluid carrier that remains substantially present during the curing of an adhesive composition and an active component capable of promoting the cure and/or enhancing adhesion of the adhesive and being miscible in the fluid carrier.

Abstract: A storage stable anaerobic composition which does not require constant aeration with a viscosity between 50,000 to 5,000,000 mPa.s and a volume expansion of between about 1 to 20% due to the creation within the composition by aeration of stable, uniform, microcellular foam.

Abstract: Resin compositions useful for filament winding applications comprising an epoxy component including at least one polyepoxide resin curable by heat, an olefinicially unsaturated monomer component including at least one polyolefinically unsaturated monomer curable by actinic radiation, at least one photoinitiator, at least one organic peroxide, and a heat activated curing agent for epoxides. The compositions have a viscosity less than about 2000 centipoise (cps) and are capable of retaining this viscosity for at least about 2 hours at a temperature of from about ambient temperature to about 60.degree. C. The resins are capable of being immobilized by actinic radiation exposure and further heat cured without substantial resin drip. One or more organic peroxides are employed, selected from the group of organic peroxides having 10 hour decomposition half lives at temperatures of from about 50.degree. C. to less than about 104.degree. C.

Abstract: A curable thiol-ene composition specially adapted for use as a primary coating on optical fibers comprises a polythiol and a compound having a plurality of norbornene groups thereon, are characterized in that one of either the compound having the plurality of norbornene groups or the polythiol has a backbone of a poly(tetramethylene oxide), or is an oligomer thereof, and the poly(tetramethylene oxide) has a molecular weight of between 250 and 5,000. The formulations are relatively low viscosity liquids at practical application temperatures and cure substantially completely with very low irradiation fluence. The formulations cure in ambient air. There is no need to exclude oxygen or to control humidity. The formulations of the invention can be cured using low intensity UV lamps which do not generate significant amounts of heat. The cured products have excellent low temperature flexibility, good humidity and water absorbtion resistance and good thermal oxidative stability.

Abstract: A one-component air-activatable polymerisable adhesive composition comprising:(a) a free-radically polymerisable monomer, and an activator system for effective polymerisation of the free-radically polymerisable monomer, said activator system comprising:(b) an autoxidisable compound which is a dihydropyridine (other than a stabilised 1,4-dihydropyridine)(c) a tetrazo le having the formula III ##STR1## wherein R.sup.8 is selected from hydrogen and hydrocarbyl groups, and (d) a soluble ionic salt,with the proviso that the composition does not contain a peroxide, or a peroxide precursor which produces peroxide in the absence of air or any ingredient which is a significant source of radicals in the absence of air, the composition having been prepared under anaerobic conditions and stored under anaerobic conditions.

Abstract: A dispensing assembly for heating and subsequent dispensing of a microwaveable adhesive material, comprising: a dispenser housing having a microwaveable adhesive charge-receiving cavity therein; a microwave susceptor member in the cavity, constructed and arranged to receive microwave energy when the dispensing assembly is exposed to microwave radiation and to responsively generate heat; and a microwaveable adhesive charge of a size and shape for insertion into and retention in the cavity including the microwave receptor, the charge comprising a container having disposed therein a microwaveable adhesive material; wherein the microwaveable adhesive charge is devoid of susceptor materials and susceptor structure. Also disclosed are susceptor-free adhesive charge articles.

Abstract: A glue stick article adapted for microwave heating and dispensing of hot melt adhesive material, comprising a container having disposed therein a solid body of hot melt adhesive material having a cross-sectional shape differing from the cross-sectional shape of the container in which the hot melt adhesive material is disposed for microwave heating. Also disclosed is a hot melt adhesive dispensing assembly for microwave heating and dispensing of hot melt adhesive from such glue stick article.

Abstract: Resin compositions useful for filament winding applications comprising an epoxy component including at least one polyepoxide resin curable by heat, an olefinicially unsaturated monomer component including at least one polyolefinically unsaturated monomer curable by actinic radiation, a cyanate ester component including at least one cyanate ester compound having at least two cyanate functional groups per molecule, at least one organic peroxide, at least one photoinitiator, and a heat activated curing agent for epoxides. The compositions have a viscosity less than about 2000 centipoise (cps) and are capable of retaining this viscosity for at least about 6 months at about ambient temperature. The resins are capable of being immobilized by actinic radiation exposure and further heat cured without substantial resin drip. One or more organic peroxides are employed, selected from the group of organic peroxides having 10 hour decomposition half-lives at temperatures of from about 50.degree. C. to less than about 104.

Abstract: A curable cyanoacrylate adhesive composition intended for medical and/or veterinary uses is sterilized in liquid form by gamma irradiation. The composition comprisesa) a cyanoacrylate monomerb) a combination of an anionic stabilizer and a free-radical stabilizer in amounts effective to stabilize the composition during irradiation and to stabilize the sterilized composition during storage prior to cure, wherein the free radical stabilizer is a selected phenolic antioxidant (but not including hydroquinone).The preferred free radical stabilizer is butylated hydroxyanisole. After irradiation the cyanoacrylate monomer is substantially ungelled.

Abstract: A one-part, air-activatable, polymerizable composition comprising:(a) at least one free-radically polymerizable monomer, and(b) an activator system for effective polymerization of the free-radically polymerizable monomer, said activator system comprising at least one auto-oxidizable compound of a formula which includes the structure I: ##STR1## where x is 0 or 1, and where the lines representing unfilled valencies indicate bonds to carbon, hydrogen or hetero atoms, alone or in combination with a weak acid;with the proviso that:when x=0, the nitrogen atom in structure I is not bonded to a second nitrogen atom;and when x=1 there is a structure I in the compound in which the >C.dbd.C< moiety does not form part of a phenyl ring;with the proviso that the composition does not contain a peroxide, or a peroxide precursor which produces peroxide in the absence of air or any ingredient which is a significant source of radicals in the absence of air.

Abstract: A polymer dispersed liquid crystal composite prepared from: (1) at least one multifunctional electron-rich alkene that does not undergo appreciable homopolymerization and is selected from the group consisting of (a) vinyl ethers and vinyl sulfides; (b) keteneacetals, ketenethioacetals and methylene oxathiolanes, wherein the carbon of the carbon-carbon double bond not bearing the electron donating group has bonded to it H or a combination of H and a C1 to C.sub.6 alkyl, preferably a methyl group; (c) ortho or para vinyl phenyl ethers or thioethers (also known as styryloxy or styrylthio ether monomers); or (d) bicylic alkenes which have, as a result of their stereoelectronic configuration, unequal .pi.-electron density above and below the plane of the carbon-carbon double bond axis; (2) a multifunctional thiol; (3) a photoinitiator; and (4) liquid crystal material.

Abstract: A radiation and moisture curable silicone conformal coating composition comprises a silicone fluid of a monovalent ethylenically unsaturated functional group endcapped silicone and at least one (meth)acryl-functionalized silicone; and a photoinitiator effective for radiation curing of the silicone composition. The encapped silicone is the product of a reaction between a silanol terminated silicone and a silane cross linker having joined directly to a silicon atom thereof a monovalent ethylenically unsaturated functional group and at least 2 hydrolyzable groups.

Abstract: A one-component air-activatable polymerizable adhesive composition comprising:(a) a free-radically polymerizable monomer, and an activator system for effective polymerization of the free-radically polymerizable monomer, said activator system comprising:(b) an autoxidizable compound which is a dihydropyridine (other than a stabilized 1,4-dihydropyridine)(c) an onium salt selected from diazonium, iodonium and sulfonium salts which do not interfere with polymerization, and(d) a soluble ionic salt, with the proviso that the composition does not contain a peroxide, or a peroxide precursor which produces peroxide in the absence of air or any ingredient which is a significant source of radicals in the absence of air.Exemplary onium salts are diaryl iodonium, triarylsulfonium and aryl diazonium salts.

Abstract: A method of preparing an .alpha.-cyanoacrylate ester of a desired alcohol includes the steps ofpreparing a compound which is an .alpha.-selenoaryl-.alpha.-cyanopropionate ester of the desired alcohol,oxidizing said .alpha.-selenoaryl-.alpha.-cyanopropionate ester to the corresponding selenoxide,eliminating arylselenic acid from the selenoxide to produce said .alpha.-cyanoacrylate ester, andseparating said .alpha.-cyanoacrylate ester from the selenic acid.At temperatures of about 0.degree. C. or higher, the elimination step occurs concurrently with the oxidizing step using a peroxide or ozone oxidizing agent. The desired cyanoacrylate ester is obtained in good yield and very high purity. The method can be used to prepare difficult to synthesize plural functional cyanoacrylate monomers and mono- cyanoacrylate monomers regardless of alcohol chain length.