US 2019/0241690 A1Published application

Crosslinkable and crosslinked compositions

Assignee3M Innovative Properties Company

InventorsNicole Morozowich Beveridge, Ross E. Behling, Anish Kurian, Mark F. Ellis, Karl E. Benson, Michele A. Craton, Daniel C. Munson, David J. Yarusso

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Abstract

Crosslinkable compositions, crosslinked compositions, articles containing these compositions, and methods of making the articles are provided. The crosslinkable compositions, which include two (meth)acrylate polymers, are used to form the crosslinked compositions upon exposure to ultraviolet radiation. The crosslinkable and crosslinked compositions are free or substantially free of tackifiers. The crosslinked compositions can function as pressure-sensitive adhesives. The crosslinkable compositions are well suited for use with hot melt processing methods.

Claims15

Dependent claims

A crosslinkable composition comprising:

1) a first (meth)acrylate polymer having a weight average molecular weight in a range of 50,000 to 500,000 Daltons, wherein the first (meth)acrylate polymer is a reaction product of a first monomer composition comprising
a) an alkyl (meth)acrylate;
and
b) an optional UV crosslinking monomer having an aromatic ketone group that is crosslinkable when exposed to ultraviolet radiation, wherein the UV crosslinking monomer is present in an amount in a range of 0 to 0.3 mole percent based on total moles of monomer in the first monomer composition;
and
2) a second (meth)acrylate polymer having a weight average molecular weight in a range of 50,000 to 500,000 Daltons, wherein the second (meth)acrylate polymer is a reaction product of a second monomer composition comprising
a) an alkyl (meth)acrylate;
and
b) a UV crosslinking monomer having an aromatic ketone group that is crosslinkable when exposed to ultraviolet radiation, wherein the UV crosslinking monomer is present in an amount equal to at least 1 mole percent based on total moles of monomer in the second monomer composition,
wherein the crosslinkable composition is free or substantially free of tackifier.

7 more elements

A crosslinked composition comprising a reaction product of a crosslinkable composition exposed to ultraviolet radiation, the crosslinkable composition comprising:

1) a first (meth)acrylate polymer having a weight average molecular weight in a range of 50,000 to 500,000 Daltons, wherein the first (meth)acrylate polymer is a reaction product of a first monomer composition comprising
a) an alkyl (meth)acrylate;
and
b) an optional UV crosslinking monomer having an aromatic ketone group that is crosslinkable when exposed to ultraviolet radiation, wherein the UV crosslinking monomer is present in an amount in a range of 0 to 0.3 mole percent based on total moles of monomer in the first monomer composition;
and
2) a second (meth)acrylate polymer having a weight average molecular weight in a range of 50,000 to 500,000 Daltons, wherein the second (meth)acrylate polymer is a reaction product of a second monomer composition comprising
a) an alkyl (meth)acrylate;
and
b) a UV crosslinking monomer having an aromatic ketone group that is crosslinkable when exposed to ultraviolet radiation, wherein the UV crosslinking monomer is present in an amount equal to at least 1 mole percent based on total moles of monomer in the second monomer composition,
wherein the crosslinkable composition is free or substantially free of tackifier.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/341,959Filed 22 Aug 2017
Priority: 26 Oct 2016
Published: 8 Aug 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

C09J 133/08
Of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical: homopolymers or…
C08F 2/48
Polymerisation initiated by wave energy or particle radiation: by ultraviolet or visible light
C08F 220/18
Of phenols or of alcohols containing two or more carbon atoms: with acrylic or methacrylic acids
C08F 220/1808
With acrylic or methacrylic acids: c8-acrylate, e.g. isooctyl acrylate or 2-ethylhexyl acrylate