摘要:
The adhesive or adhesive component according to the invention, which contains a vinyl monomer, a vinyl polymer, a compound producing free radicals, and, as an adhesion promoter, an acid amide or imide which is substituted on the nitrogen atom by a chlorosulfonated alkyl, aryl or aralkyl group, forms, together with an amine accelerator, an adhesive with which heat-, oil- and water-resistant bonds, for example of metals, polymeric materials, glass and ceramics, having very high tensile shearing strength can be obtained. The adhesive can also be converted into the form of a dried sheet, with or without carrier, and in this form can be used for bonding.
摘要:
Heat-curable adhesive films of variable tack can be prepared:1. by coating a peelable release film or substrate with a liquid mixture of substances containing(a) 2-24% by weight of a photopolymerizable compound containing at least one grouping CH.sub.2 .dbd.C(R)COO-- in which R is a hydrogen atom or a methyl group,(b) 20-90% by weight of a heat-curable epoxide resin or mixture of epoxide resins containing no photopolymerizable groups,(c) a heat-activatable curing agent for epoxide resins,(d) 0.1 to 2% by weight of an accelerator,(e) 0.01 to 5% by weight of a photopolymerization catalyst for the component (a) and(f) if appropriate, further additives, the sum of the components (a) to (f) being 100% by weight,2. by covering the layer, if necessary, with a reinforcing material and again coating with a mixture of substances according to 1, and3. irradiating the layer thus obtained with actinic light.
摘要:
Storage stable curing agents for acrylate adhesives, which curing agents are miscible with an acrylate resin adhesive, are produced by the mixing together of a polymerizable monomer, a thermoplast or elastomer soluble therein, and a liquid aldehyde/amine condensation product, and subsequent homogenisation of the mixture at elevated temperature. The curing agents, which optionally contain also stabilizers and curing accelerators, can be mixed with acrylate resin adhesives in any chosen quantity ratio between 2:1 and 1:2.
摘要:
A circuit board is received in a cut-out in a surrounding frame. The circuit board has a peripheral ground conductor which is connected to the surrounding frame by the conductive teeth of an assembly of combs. The non-toothed spines of the combs are arranged along the margins of the surrounding frame and the teeth are inclined. They are preferably inclined in the plane of their spines. Such an assembly could be used for the amplifier of a telephone repeater assembly.
摘要:
Powder coating compositions comprise a binder selected from carboxyl-group-containing polyesters, carboxyl-group-containing poly(meth)acrylates and mixtures of the said substances, and one or more epoxy compounds, wherein the epoxy compounds comprise at least one compound of formula (I) that is solid at 25° C.: wherein A corresponds to a group of formula (II), (IIl), (IV) or (VI): in which B is an x-valent organic radical that is derived from a polyol having x or more hydroxyl groups by the removal of x hydroxyl groups; E is a (2x)-valent organic radical that is derived from a polyol having (2x) or more hydroxyl groups by the removal of (2x) hydroxyl groups; and D is a (y+2z)-valent radical that is derived from a polyol having (y+2z) or more hydroxyl groups by the removal of (y+2z) hydroxyl groups; R1 and R5 are each independently of the other hydrogen, halogen, C1-C4alkyl or C1-C4alkoxy or are together a methylene group; and R2, R3, R4, R6, R7, R8 and R9 are each independently of the others hydrogen, halogen, C1-C4alkyl or C1-C4alkoxy; x is an integer of at least 3; y is an integer from 1 to (x−1) and z is (x−y).
摘要:
There are disclosed laminated structures which are bonded with a UV-/VIS-curable composition and which consist of a main foil A) which is substantially impervious to light, at least one interlayer B) which is substantially impervious to light in the absence of the adhesive and which carries on the side with its back to the main foil information in the form of a color pattern, and of a substantially light-permeable covering foil C). The laminated structures can be used as identity cards.
摘要:
The present invention relates to a process for preparing a laminated structure containing at least a main foil which is substantially impervious to light, B) at least one interlayer, and C) a covering foil which is substantially light-permeable. The layers are bonded together using a UV-curable and/or VIS-curable composition. The interlayer, prior to contact with the curable composition, is substantially impervious to the irradiation necessary for curing the curable composition and becomes transparent when impregnated with the curable composition so as to effect polymerization of multiple layers of curable composition in one irradiation step. The laminated structure is prepared by applying a layer of the curable composition to the main foil A), applying the interlayer B) to the main foil A), applying a further layer of the curable composition to the interlayer B), applying a covering foil C) to the interlayer B), and irradiating the laminated structure so obtained through the covering foil C) with UV- and/or VIS-radiation