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US 2025/0034391 A1Published application
One-component expandable thermosetting epoxy composition with improved storage stability
AssigneeSika Technology AG
InventorMabell DELGADO TORRONTEGUI
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Abstract
A one-component thermosetting epoxy resin composition, including a) at least one epoxy resin A having on average more than one epoxide group per molecule; b) at least one latent hardener for epoxy resins; c) at least one physical or chemical blowing agent BA; d) at least one carboxyl group containing acrylonitrile/butadiene rubber ABR and e) 0.075-0.5 wt.-% of a composition KP including a blend of at least two different phosphites. The epoxy resin adhesive is notable for the improved storage stability, especially under warm conditions.
Claims15
One-component thermosetting epoxy resin composition, comprising
- a) at least one epoxy resin A having on average more than one epoxide group per molecule;
- b) at least one latent hardener for epoxy resins;
- and
- c) at least one physical or chemical blowing agent BA;
- and
- d) at least one carboxyl group containing acrylonitrile/butadiene rubber ABR;
- and
- e) 0.075-0.5 wt.-%, of a composition KP comprising a blend of at least two different phosphites of the structure of formula (I)
- wherein R1, R2, and R3 are independently selected alkylated aryl groups of the structure of formula (II)
- wherein R4, R5, and R6 are independently selected from the group consisting of hydrogen and C1-C6 alkyl, provided that at least one of R4, R5, and R6 is not hydrogen, based on the total amount of carboxyl group containing acrylonitrile/butadiene rubber ABR.
7 more elements
Dependencies are inferred from the claim text.