摘要:
An adhesive composition is provided that includes a block copolymer present at greater than or equal to 30 total weight percent of the adhesive system comprising a high glass transition temperature in subunits Y and Y′, each of the subunits Y and Y′ having a high glass transition temperature of from 70° C. to 130° C. with a low glass transition temperature subunit Z having a low glass transition temperature of from −100° C. to 10° C. intermediate between said high glass transition temperature acrylate subunits to define a structure Y-Z-Y′. The triblock copolymer is dissolved in a monomer curable under free radical. A free radical initiator of a peroxide or a hydroperoxide are present in combination with a sulfonyl chloride, dihydropyridine and copper or vanadium salt. By heating the cured adhesive at or above 70° C., the adhesive is amenable to being removed, repaired, or reworked.
摘要:
The invention is a composition comprising a) one or more organotitanates having four ligands wherein the ligands are hydrocarbyl, optionally containing one or more functional groups having one or more heteroatoms selected from the group comprising oxygen, nitrogen, phosphorus and sulfur wherein two or more of the ligands may form a cyclic structure; b) one or more mercaptosilanes; c) one or more polyaminosilanes; d) one or more secondary aminosilanes; and e) a solvent which dissolves the components of the composition. The composition also includes an organotin compound f). This composition is referred to as a clear primer hereinafter. In another embodiment the invention is a system for bonding glass to a substrate which comprises a clear primer according to the invention; and an adhesive comprising an isocyanate functional prepolymer and a catalyst for the cure of the isocyanate functional prepolymer.
摘要:
In one aspect, the present invention is a method for treatment of a painted or glass surface so as to provide improved adhesion of a urethane adhesive applied thereafter, comprising the steps of applying a pre-wipe solution to the surface, the pre-wipe solution comprising a hydrocarbyl substituted aromatic sulfonic acid and a solvent for the acid which is soluble in the solvent; and allowing the solvent to evaporate. In a second aspect, the present invention is a pre-wipe composition comprising from 0.5 percent to 10.0 percent by weight of the acid and from 90.0 percent to 99.5 percent by weight of solvent for the acid.
摘要:
In one aspect, the present invention is a method for treatment of a painted or glass surface so as to provide improved adhesion of a urethane adhesive applied thereafter, comprising the steps of applying a pre-wipe solution to the surface, the pre-wipe solution comprising a hydrocarbyl substituted aromatic sulfonic acid and a solvent for the acid which is soluble in the solvent; and allowing the solvent to evaporate. In a second aspect, the present invention is a pre-wipe composition comprising from 0.5 percent to 10.0 percent by weight of the acid and from 90.0 percent to 99.5 percent by weight of solvent for the acid.
摘要:
A composition for priming and cleaning glass, aluminium or steel surfaces which comprises a solution in an organic solvent, optionally mixed with water, of an organosilane and a compound which generates an acid on exposure to actinic adiation.
摘要:
In one aspect, this invention is a primer which comprises a solution of: (a) a polyester resin of a carboxylic acid and a glycol; and (b) a polymethylene poly(phenyl isocyanate), diphenylmethane diisocyanate, or mixture thereof; in a volatile solvent, wherein the weight ratio of (a):(b) is in the range of from 0.25:1.0 to 2.0:1.0. In a second aspect, this invention is a primer which comprises a solution of: (a) 5 to 18 weight percent of a polyester resin of a carboxylic acid and a glycol; and (b) 6 to 17 weight percent of a polymethylene poly(phenyl isocyanate), diphenylmethane diisocyanate, or mixture thereof; in a volatile solvent. It has been discovered that the primer of the invention advantageously provides improved adhesion characteristics of metal-to-glass bonding when used to prime paint-coated metal substrates before the application of a urethane adhesive, particularly when used with a "fast cure" adhesive comprised of an isocyanate-functional prepolymer and dimorpholinediethyl ether.
摘要:
Gegenstand der vorliegenden Erfindung sind Zusammensetzungen enthaltend mindestens ein Reaktionsprodukt, welches erhalten wird aus einer Reaktionsmischung umfassend i) mindestens ein Mercaptosilan MS, sowie ii) mindestens ein Polysilan PS, welches insbesondere mindestens eine sekundäre oder tertiäre Aminogruppe, bevorzugt eine sekundäre Aminogruppe, aufweist, sowie iii) mindestens ein Epoxidharz EP. Die Zusammensetzungen eignen sich als Haftvermittler, insbesondere in Form von Primern. Sie weisen gute Haftung auf und sind insbesondere für das Verkleben von Glas und Glaskeramik geeignet.
摘要:
Bei dem Verfahren zum Verbinden zweier Teile besteht der eine Teil (Primärteil) aus einem anorganischen Werkstoff, aus einem kratzfest beschichteten Polykarbonat oder aus einem Polypropylen (PP) und der andere Teil (Sekundärteil) aus einem Polypropylen (PP). Bei dem Sekundärteil wird die Oberfläche zumindest des Verbindungsbereiches durch eine Vorbehandlung aktiviert, bei der die Oberflächenspannung des PP erhöht wird. Bei einem aus PP bestehenden Primärteil wird ebenfalls die Oberfläche zumindest des Verbindungsbereiches durch eine Vorbehandlung aktiviert, bei der die Oberflächenspannung des PP erhöht wird. Auf den Verbindungsbereich des Primärteils oder auf den Verbindungsbereich des Sekundärteils wird ein Klebstoff aufgetragen, der ein MS-Polymer oder ein silan-modifiziertes Polyurethan (SMP oder Hybrid) ist. Der Primärteil und der Sekundärteil werden mit ihren Verbindungsbereichen aneinander angedrückt und miteinander verbunden.
摘要:
The invention relates to a method of surface treatment of predetermined areas of a composite material structure with at least one plasma beam at atmospheric pressure, produced by a plasma generator provided with an emission nozzle in order to facilitate its adhesive bonding to another structure, in which: a) the plasma beam emitted through the nozzle may include a reactive gas, is projected on the composite material structure from a distance comprised between 0,2 and 10 cm; b) the plasma beam is projected on the composite material structure with an angle of incidence comprised between 75° and 105°. It is preferably applied to carbon fiber or fiberglass and epoxy resin or bismaleimide resin structures. Other relevant variables in the process are the plasma beam power and the treatment rate.