US 2023/0106433 A1Published application

Acrylic multilayer foil with improved mechanical properties and a high weathering resistance

AssigneeRoehm GmbH

InventorsGhirmay SEYOUM, Michael ENDERS, Herbert GROOTHUES, Claude GUENANTEN, Kim STRUWE, Helmut HAERING, Girolamo MUSCI

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Abstract

An acrylic multilayer foil includes a layer in which silica particles are uniformly distributed in an acrylic polymer matrix and at least one further layer. Due to adhesive promoting properties of the layer containing silica particles, the multilayer foil can be easily coated or laminated onto a substrate. The foil has a high weathering resistance and excellent mechanical properties. Therefore, the multilayer foil is highly suitable for surface-protection of materials such as polyvinyl chloride (PVC) and for use in high-pressure laminates (HPLs).

Claims20

Dependent claims

A multilayer foil comprising least a layer A and a layer B, wherein the layer A consists of a moulding composition comprising, based on the total weight of the layer A:

from 0.0 to 78.0 wt. % of a polyalkyl (meth)acrylate;
from 20.0 to 98.0 wt. % of an impact modifier;
from 2.0 to 40.0 wt. % of particulate silica;
from 0.0 to 20.0 wt. % of an adhesion-promoting copolymer, comprising, based on the weight of the adhesion-promoting copolymer:
from 70.0 to 99.5 wt. % methyl methacrylate;
from 0.5 to 15.0 wt. % of an adhesion-promoting monomer;
from 0.0 to 25.0 wt. % of another vinyl-copolymerizable monomer having no functional group other than a vinyl functional group;
from 0.0 to 38.0 wt. % of a fluoropolymer;
from 0.0 to 5.0 wt. % of a UV absorber;
and
from 0.0 to 5.0 wt. % of a UV stabilizer,
wherein a cumulative content of the polyalkyl (meth)acrylate and the impact modifier in the moulding composition of the layer A is at least 50 wt. %, based on the weight of the layer A;
and
the layer B consists of a moulding composition comprising, based on the total weight of the layer B:
from 0.0 to 100.0 wt. % of a polyalkyl (meth)acrylate;
from 0.0 to 95.0 wt. % of an impact modifier;
from 0.0 to 40.0 wt. % of a fluoropolymer;
from 0.0 to 5.0 wt. % of a UV absorber;
from 0.0 to 5.0 wt. % of a UV stabilizer;
from 0.0 to 20.0 wt. % of an adhesion-promoting copolymer, comprising, based on the weight of the adhesion-promoting copolymer:
from 70.0 to 99.5 wt. % of methyl methacrylate;
from 0.5 to 15.0 wt. % of an adhesion-promoting monomer;
and
from 0.0 to 25.0 wt. % of another vinyl-copolymerizable monomer having no functional group other than a vinyl functional group,
wherein a cumulative content of the polyalkyl (meth)acrylate and the impact modifier in the moulding composition of the layer B is at least 50 wt. %, based on the weight of the layer B.

22 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/904,251Filed 18 Feb 2021
Priority: EP 20157832.518 Feb 2020
Published: 6 Apr 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification43 codes

B32B 7/10
Interconnection of layers: at least one layer having inter-reactive properties
B32B 27/08
As the main or only constituent of a layer, which is next to another layer of the same or of a different material: of synthetic resin
B32B 27/10
As the main or only constituent of a layer, which is next to another layer of the same or of a different material: of paper or cardboard
B32B 27/18
Layered products comprising a layer of synthetic resin: characterised by the use of special additives