Antistatic pressure sensitive adhesive
Assignee3M Innovative Properties Company
InventorsXiaowen LIN, Qing YANG, Huijie XIE, Zhi Ping LIU
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Abstract
An antistatic pressure sensitive adhesive composition, useful in electronic and optical display applications, comprising an antistatic agent and a first block copolymer comprising at least two hard A block polymeric units each independently having a Tg of at least 50° C., and at least one soft B block (meth)acrylic polymeric unit having a Tg no greater than 20° C. The composition can comprise a second block copolymer. Articles comprising an antistatic pressure sensitive adhesive composition adjacent a first surface of a substrate.
Claims19
An antistatic pressure sensitive adhesive comprising:
- a (meth)acrylate-based optically clear pressure sensitive adhesive matrix that is the product of a reaction mixture comprising:
- at least one alkyl (meth)acrylate, wherein the alkyl group has 4 to 18 carbon atoms;
- at least one hydrophilic copolymerizable monomer;
- at least one crosslinking monomer;
- at least one photo-activated crosslinker;
- and
- a free-radical generating initiator;
- and
- at least one antistatic agent;
- wherein the antistatic pressure sensitive adhesive is optically clear having a visible light transmission of at least 90% and a haze of less than 1%, has a 180° Peel Adhesion on glass of at least 0.77 N/mm, and a Surface Resistance of from 108-1010 ohms/cm2.
A laminate article comprising:
- a first substrate;
- a second substrate;
- and
- an antistatic pressure sensitive adhesive disposed between the first and second substrates, wherein the antistatic pressure sensitive adhesive comprises:
- a (meth)acrylate-based optically clear pressure sensitive adhesive matrix that is the product of a reaction mixture comprising:
- at least one alkyl (meth)acrylate, wherein the alkyl group has 4 to 18
- carbon atoms;
- at least one hydrophilic co-polymerizable monomer;
- at least one crosslinking monomer;
- at least one photo-activated crosslinker;
- and
- a free-radical generating initiator;
- and
- at least one antistatic agent;
- wherein the antistatic pressure sensitive adhesive is optically clear having a visible light transmission of at least 90% and a haze of less than 1%, has a 180° Peel Adhesion on glass of at least 0.77 N/mm, and a Surface Resistance of from 108-1010 ohms/cm2.
A method of preparing an article comprising:
- providing a first substrate with a first major surface and a second major surface;
- providing a second substrate with a first major surface and a second major surface;
- and
- preparing an antistatic pressure sensitive adhesive or a pressure sensitive adhesive precursor mixture,
- disposing the antistatic pressure sensitive adhesive or pressure sensitive adhesive precursor mixture on at least a portion of the second major surface of the first substrate to form an adhesive layer;
- disposing the second substrate on the adhesive layer;
- wherein the antistatic pressure sensitive adhesive is optically clear having a visible light transmission of at least 90% and a hze of less than 1%, has a 180° Peel Adhesion on glass of at least 0.77 N/mm, and a Surface Resistance of from 108-1010 ohms/cm2.
Dependencies are inferred from the claim text.