Abstract: Polyamides based on reaction products of C4-C18 dicarboxylic acids and diamines are suitable as molding compositions for the production of moldings in the low pressure injection molding process, and for adhesive sealing or filling in the production of electrical or electronic devices, in particular of plugs, cables, switches, sensors, transponders, modules, printed circuit boards or smart cards. In comparison with conventional molding compositions based in known hot melt adhesives, said polyamides exhibit higher strength values, higher abrasion resistance and higher chemical resistance.

Abstract: The bondability of a polyolefin, particularly to cyanoacrylate adhesives, is improved by incorporating in the polyolefin a polymerization initiator capable of initiating the polymerization of the monomers constituting the cyanoacrylate adhesive. The polymerization initiator may, for example, be a sterically hindered nitrogen base and may be mixed with the polyolefin at a temperature above the polyolefin's glass transition temperature using, for example, co-extrusion or co-injection methods.

Abstract: The invention relates to an adhesive containing two components A and B, whereby component A comprises both a functional group which can be polymerized by means of irradiation with UV beams as well as at least one functional group which is able to react with a compound having at least one acidic hydrogen atom and component B comprises at least two functional groups which can be polymerized by means of irradiation with UV beams or with electron beams. The adhesive is suitable for the production of composite materials and exhibits a high flexibility with a good initial bonding.

Abstract: A self-dispersible curable epoxy resin composition containing a reaction product of: (a) 1.0 equivalent of epoxy resin; (b) 0.01 to 1.0 equivalent of polyhydric phenol; and (c) 0.005 to 0.5 equivalent of an amine/epoxy adduct formed by reacting: (i) an aromatic polyepoxide; and (ii) a polyoxyalkylenamine, in an equivalent ratio of from about 1:0.10 to 1:0.28.

Abstract: An adhesive useful in making composites includes two components A and B. Component A includes at least one polymer having a molecular weight (Mn) of at least 800 that has at least one functional group polymerizable by irradiation with UV light or with electron beams and has at least one functional group capable of reacting with a compound having at least one acidic hydrogen atom. Component B includes at least one compound having a molecular weight (Mn) of from about 100 to about 8000 which has at least two functional groups polymerizable by irradiation with UV light or with electron beams.

Abstract: Self-dispersing, hardenable epoxy resins produced by reacting one or more &agr;,&bgr;-unsaturated carboxylic acid esters with one or more aminopolyalkylene oxide compounds, reacting the thus formed intermediate with one or more polyhydroxy compounds, and reacting the thus formed intermediate with one or more polyepoxide compounds, are described. Processes for their production, aqueous dispersions containing the same and methods for their use are also described.

Abstract: Hardeners for epoxy resins produced by reacting one or more &agr;,&bgr;-unsaturated carboxylic acid esters with one or more hydroxy compounds, reacting the thus formed intermediate with one or more aminopolyalkylene oxide compounds, reacting the thus formed intermediate with one or more polyepoxide compounds, and reacting the thus formed intermediate with one or more amines are described. Processes for their production, aqueous dispersions containing the same and methods for their use are also described.

Abstract: Hardeners for epoxy resins produced by reacting one or more &agr;,&bgr;-unsaturated carboxylic acid esters with one or more aminopolyalkylene oxide compounds, reacting the thus formed intermediate with one or more polyepoxide compounds, and reacting the thus formed intermediate with one or more amines are described. Processes for their production, aqueous dispersions containing the same and methods for their use are also described.

Abstract: Hardeners for epoxy resins produced by reacting one or more &agr;,&bgr;-unsaturated carboxylic acid esters with one or more aminopolyalkylene oxide compounds, reacting the thus formed intermediate with one or more polyhydroxy compounds, reacting the thus formed intermediate with one or more polyepoxide compounds, and reacting the thus formed intermediate with one or more amines are described. Processes for their production, aqueous dispersions containing the same and methods for their use are also described.

Abstract: The bondability of a polyolefin, particularly to cyanoacrylate adhesives, is improved by incorporating in the polyolefin a polymerization initiator capable of initiating the polymerization of the monomers constituting the cyanoacrylate adhesive. The polymerization initiator may, for example, be a sterically hindered nitrogen base and may be mixed with the polyolefin at a temperature above the polyolefin's glass transition temperature using, for example, co-extrusion or co-injection methods.

Abstract: The process of curing a radical-polymerizable multicomponent mixture containing an olefinically-unsaturated compound with ambient air by adding to the mixture an alkyl, cycloalkyl or aryl hydrazone of an aliphatic, cycloaliphatic or aromatic aldehyde or ketone which forms a hydroperoxide as an initiator for curing the mixture.

Abstract: The invention pertains to an aerobically curing composition comprising free-radical polymerizable compounds, an activator system, and optionally conventional additives, characterized in that said composition contains as said free-radical polymerizable compounds at least one polyurethane (meth)acrylate one or more (meth)acrylate comonomers; wherein said composition contains from 20 to 80% by weight of said polyurethane (meth)acrylate and from 80 to 20% by weight of said (meth)acrylate comonomer(s), based on the total of polymerizable compounds, and said activator system is a hydrazone activator system, as well as the preparation and use of said composition.

Abstract: A reaction adhesive becomes porous after hardening. This allows both small and larger gaps to be sealed between the bonded substrates, as the liquid adhesive has a low to medium viscosity and the hardened glue shows a marked volume increase. Reaction adhesives based on (meth)acrylates and that contain azo-bis-isobutyronitrile as initiator and expanding agent are preferably used. The disclosed reaction adhesive is preferably used for gluing reactive coils.

Abstract: Described is a single-component adhesive made from a radical-polymerized olefinically unsaturated monomer and an air-activated initiator system and characterized in that the adhesive also contains isocyanate and/or silane groups. This makes a dual curing mechanism possible. The more rapid of the two curing reactions gives specific characteristics in the initial stage, e. g. high initial strength, high adhesive strength or high contact strength. The slower of the two reactions produces the definitive characteristics, e.g. final strength or resistance to heat.

Abstract: The invention pertains to a composition containing an activator system for free-radical polymerizations and a free-radical polymerizable compound of the general formula II:?H.sub.2 C.dbd.CR.sup.1 --C(.dbd.O)--O--R.sup.2 --O--C(.dbd.O)--NH--Q--NH--C(.dbd.O)!.sub.2 ?{--O--R.sup.4a --O--C(.dbd.O)--NH--Q'--NH--C(.dbd.O)}.sub.m --O--R.sup.4a --O--!(II)whereinm is from 0 to 10;R.sup.1 is hydrogen or a methyl group;R.sup.2 is a linear or branched chain alkyl group containing from 2 to 6 carbon atoms or an alkylene oxide containing from 4 to 21 carbon atoms;Q and Q' independently are aromatic, aliphatic or cycloaliphatic groups containing from 6 to 18 carbon atoms which are derived from the basic diisocyanate or diisocyanate mixtures; andR.sup.4a is derived from a polyesterdiol having a C:O ratio of >2.6, a C:H ratio of <10, and a molecular weight of from 1000 to 20,000.The invention further pertains to a process for the preparation of such composition and the use thereof.

Abstract: An activator for cyanoacrylate adhesives based on N,N-dialkyl aniline derivatives is provided. The activators are characterized by a molecular weight of more than 200 and by at most 3 carbon atoms for both N,N-dialkyl substituents together. Also provided are methods of production and use of the activator and to the combination product of the activator and the cyanoacrylate adhesive.

Abstract: New contact adhesives which are designed as multifunctional contact reactive adhesives and which may be used in a multistage curing process, for example for bonding wood, plastic moldings, metals and the like, are provided. One of the functional substituents of the adhesive composition is characterized by the presence of an olefinic double bond which is accessible to radical reaction initiation. The other functional substituent is an isocyanate group which reacts off, e.g. under the effect of moisture. These different reaction mechanisms enable the reactive contact adhesive to be cured in stages, e.g. by forming contact-sensitive adhesive layers on hard surfaces in a first stage, subsequently fitting the correspondingly coated surfaces together and firmly bonding them together in a final stage, e.g. under the effect of atmospheric moisture. Also provided is a process for the production of the new reactive contact adhesives.

Abstract: Compositions containing a radical-polymerizable olefinically unsaturated compound and a hydrazone of an aromatic aldehyde or ketone are provided. Also provided are methods for the production of such compositions and methods for the use of such compositions as an adhesive and sealing compound or its use for the coating and production of plastic moldings. The compositions polymerize radically at room temperature upon exposure to ambient air.

Abstract: An activator for cyanoacrylate adhesives based on N,N-dialkyl aniline derivatives is provided. The activators are characterized by a molecular weight of more than 200 and by at most 3 carbon atoms for both N,N-dialkyl substituents together. Also provided are methods of production and use of the activator and to the combination product of the activator and the cyanoacrylate adhesive.

Abstract: An activator for cyanoacrylate adhesives based on N,N-dialkyl aniline derivatives is provided. The activators are characterized by a molecular weight of more than 200 and by at most 3 carbon atoms for both N,N-dialkyl substituents together. Also provided are methods of production and use of the activator and to the combination product of the activator and the cyanoacrylate adhesive.