FLAME RETARDANT ADHESIVE COMPOSITION

• Main Authors: Heintz, Carolin, Bardts, Mareike
• Format: Patent
• Language: English; French; German
• Published: 11.05.2022
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; DYES; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; USE OF MATERIALS AS ADHESIVES

In one aspect of the present disclosure, there is provided an adhesive precursor, comprising a first part (A) comprising: a first epoxy curing agent comprising at least one polyether amine and having an amine equivalent weight of at least 55 grams per mole of amine equivalents; a second epoxy curing agent distinct from the first epoxy curing agent and/or a secondary curative; a metal salt catalyst; a toughening agent; optionally, at least one phosphorous-based first flame retardant; optionally, at least one second flame retardant distinct from the at least one first flame retardant; and a second part (B) comprising: a first epoxy resin; and/or a second epoxy-based resin distinct from the first epoxy resin; at least one phosphorous-based first flame retardant; optionally, at least one second flame-retardant distinct from the at least one first flame retardant; an epoxy-based reactive diluent; a core-shell polymer toughening agent; and optionally, a filler material; wherein the total amount of flame retardant is lower than 50 wt.-% of the total curable adhesive precursor.