摘要:
Polyfunctional mercaptoalkyl-substituted aryl compounds, one and two-part adhesive compositions including the compounds, and methods of making and using the compounds are disclosed. The compounds include one or more aromatic rings, wherein at least one, and in one embodiment, only one aromatic ring is substituted with at least one alkylthio group and at least one oxyalkylthio group, and preferably do not include hydrolyzable linkages. The aromatic nucleus can provide the cured products with higher glass transition temperatures (Tg's) than are available from most commercially available polymercaptans. The adhesive systems include an epoxy resin or other compounds such as terminal olefins which are known to react with thiols (polymerizable material). Preferably, the compounds are used in combination with amine curatives as a two-component curing system for epoxy resins. Such a composition provides a two-stage cure which enables very quick achievement of bonded parts with handleable strength at room temperature or below, or with relatively low bake temperatures. The materials can be used for coatings, adhesives, sealants, potting compounds, and the like.
摘要:
The present invention has an object to provide curatives for epoxy resins and curing accelerators for epoxy resins, which both have improved subliming and decomposing properties and which, when mixed with an epoxy resin, enable the mixture to be greatly improved in thermal stability that is extremely important for the control of a curing reaction and to have a prolonged pot life (stability as a one-pack mixture comprising the epoxy resin, curative, etc.) and improved curability at low temperatures. The curative is characterized by being a clathrate comprising a tetrakisphenol compound represented by a general formula [I]; wherein X represents (CH 2 )n, wherein n is 0, 1, 2 or 3, and R 1 to R 8 each represents hydrogen, a lower alkyl, optionally-substituted phenyl, halogeno or a lower alkoxy, and the curing accelerator is characterized by being a clathrate comprising a tetrakisphenol compound represented by the general formula [I] shown above and a compound accelerating the curing of a compound which reacts with the epoxy group of an epoxy resin to cure the resin.
摘要:
An electrodeposition method is described where a conductive substrate is immersed in an electrodeposition coating composition comprising, in an aqueous medium: A) a resin having a plurality of acid-salted primary amine groups, and B) a curing agent having a plurality of cyclic carbonate groups.
摘要:
An electrodeposition method is described where a conductive substrate is immersed in an electrodeposition coating composition comprising, in an aqueous medium: A) a resin having a plurality of acid-salted primary amine groups, and B) a curing agent having a plurality of cyclic carbonate groups.
摘要:
Cathodic electrocoat compositions containing self-crosslinking polymers are described. The polymers of the invention are formed from an epoxide-functional prepolymer having polyepoxide and extender segments. Each extender segment has at least one pendant hydroxyalkyl carbamate group. The prepolymer is reacted with an amine compound having at least one blocked primary amine group and at least one epoxide-reactive group. The primary amine group is unblocked and the resultant polymer is dispersed in water with the aid of a neutralizing acid.
摘要:
Aminogruppen-haltige Polymersysteme, die sich zur Herstellung von Bindemitteln für Druckfarben eignen, können erhalten werden durch Aufbau eines Polymers oder Polymergemisches A aus mindestens jeweils einer Verbindung aus den Gruppen (a) Epoxide, Carbonate, Epoxid-Carbonate, (b) Amine und (c) Phenole und zumindest Teilneutralisation des erhaltenen Polymers oder Polymergemisches A und Überführung in Wasser, und gegebenfalls Herstellung eines wasserunlöslichen Polymers B, herstellbar durch Polymerisation von ethylenisch ungesättigten Monomeren in Gegenwart des Polymers oder Polymergemisches A.