Single component aqueous acrylic adhesive compositions for flexible printed circuits and laminates made therefrom
AssigneeIndustrial Technology Research Institute
InventorsJonq-Min Liu, Fu-Lung Chen, Yeong-Cherng Chiou
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Abstract
Described is a single component aqueous adhesive composition especially suitable for flexible printed circuits. The composition consists of water and a homogeneous film-forming acrylic polymer. The acrylic polymer is a polymerization product of (A) acrylonitrile or methacrylonitrile, or mixture thereof, (B) an alkyl acrylate or methacrylate having 1-12 carbon atoms in the alkyl group, or mixture thereof, (C) an oxirane-containing polymerizing ethylenic monomer and (D) a hydroxyl- or amide-containing acrylate or methacrylate. The adhesive composition is useful for bonding metal foils to polyimide films in the manufacture of flexible printed circuits.
Claims11
An aqueous acrylic adhesive composition useful for flexible printed circuits consisting essentially of water and an acrylic polymer, the acrylic polymer comprising
- (a) 15-60% by weight of acrylonitrile, methacrylonitrille or mixture thereof,
- (b) 30-85% by weight of an alkyl acrylate or methacrylate having 1-12 carbon atoms in the alkyl group, or mixture thereof,
- (c) 1-30% by weight of an oxirane-containing polymerizing ethylenic monomer,
- (d) up to 15% by weight of a hydroxyl or amide-containing acrylate or methacrylate and,
- (e) styrene;
- the acrylic polymer being present in an amount of about 10-60% by weight of the composition;
- the composition comprising a single component adhesive.
Dependencies are inferred from the claim text.