Intumescent, flame retardant pressure sensitive adhesive composition for EMI shielding applications

A flame retardant, intumescent pressure sensitive adhesive (PSA) composition comprising an admixture of:

• (a) a PSA component;
• (b) a halogenated first flame retardant component;
• (c) a metal-based second flame retardant component;
• and
• (d) a filler component of expandable, intercalated graphite particles.

A flame retardant, electromagnetic interference (EMI) shielding gasket comprising:

• a resilient core member extending lengthwise along a central longitudinal axis and having an outer surface extending circumferentially about said longitudinal axis in defining a widthwise extent of said gasket;
• an electrically-conductive outer member externally surrounding said core member, said outer member being wrapped over the widthwise extent of said gasket and having an interior surface disposed facing the outer surface of said core member and an oppositely-facing exterior surface;
• and
• a flame retardant, pressure sensitive adhesive (PSA) layer covering at least a portion of the interior surface of said outer member and bonding said outer member to the outer surface of said core member, said PSA layer being formed of an intumescent PSA composition comprising an admixture of:
• (a) a PSA component;
• (b) a halogenated first flame retardant component;
• (c) a metal-based second flame retardant component;
• and
• (d) a filler component of expandable, intercalated graphite particles.