Two-stage curable laminate
AssigneesMitsubishi Gas Chemical Company, Inc., Mgc Filsheet Co., Ltd.
InventorsAtsuhiro TOKITA, Shigeki TAHARA, Masato TAKASAKI, Kishin OZAWA
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Abstract
Provided is a two-stage curable laminate characterized in that a layer containing a high-hardness resin (B) is disposed on at least one surface of a resin layer (A) containing a polycarbonate resin (a1), a coating layer (Z) is disposed on the layer containing the high-hardness resin (B), and conditions (i) to (iii) above are satisfied.
Claims12
A two-stage curable laminate comprising a layer containing a high-hardness resin (B) on at least one surface of a resin layer (A) containing a polycarbonate resin (a1), the two-stage curable laminate further comprising a coating layer (Z) on the layer containing the high-hardness resin (B), and satisfying the following conditions (i) to (iii):
- (i) a thickness of the layer containing the high-hardness resin (B) is 10-250 μm, while a total thickness of the resin layer (A) containing the polycarbonate resin (a1) and the layer containing the high-hardness resin (B) is 100-3,000 μm;
- (ii) the high-hardness resin (B) comprises at least one of resins (B1) to (B5) below
- resin (B1)
- a copolymer resin comprising a (meth)acrylic ester constituent unit (a) represented by Formula (1) below and an aliphatic vinyl constituent unit (b) represented by Formula (2) below, wherein a total ratio of the (meth)acrylic ester constituent unit (a) and the aliphatic vinyl constituent unit (b) is 90-100 mol % to the entire constituent units of the copolymer resin, and a ratio of the (meth)acrylic ester constituent unit (a) is 65-80 mol % to the entire constituent units of the copolymer resin
- wherein R1 is a hydrogen atom or a methyl group, and R2 is a C1-C18 alkyl group,
- wherein R3 is a hydrogen atom or a methyl group, R4 is a cyclohexyl group optionally having a C1-C4 hydrocarbon group,
- resin (B2)
- a resin copolymer (D) comprising 6-77 mass % of a (meth)acrylic ester constituent unit, 15-71 mass % of a styrene constituent unit and 8-23 mass % of an unsaturated dicarboxylic acid constituent unit, or an alloy resin of the resin copolymers (D),
- resin (B3)
- a resin comprising 95-45 mass % of a polycarbonate resin (E) and 5-55 mass % of a (meth)acrylate copolymer (F), wherein the (meth)acrylate copolymer (F) contains an aromatic (meth)acrylate unit (f1) and a methacrylic ester monomer unit (f2) at a mass ratio (f1/f2) of 10-50/40-90, a weight-average molecular weight of the polycarbonate resin (E) is 37,000-71,000, and a weight-average molecular weight of the (meth)acrylate copolymer (F) is 5,000-30,000,
- resin (B4)
- a (meth)acrylic ester resin in which a ratio of a constituent unit represented by Formula (1) below to the entire constituent units is 91 mass % or more
- wherein R1 is a hydrogen atom or a methyl group, and R2 is a C1-C18 alkyl group, and
- resin (B5)
- a resin copolymer (G) containing 5-20 mass % of a styrene constituent unit, 70-90 mass % of a (meth)acrylic ester constituent unit and 5-20 mass % of a N-substituted maleimide monomer, or an alloy resin of the resin copolymer (G) and the resin copolymer (D);
- and
- (iii) the coating layer (Z) comprises 2-98 mass % of a (meth)acrylic-based monomer, 2-98 mass % of a (meth)acrylic-based oligomer and 0-15 mass % of a surface modifier, and further comprises 0.001-2.5 parts by mass of a photopolymerization initiator and 0.001-5 parts by mass of a thermal polymerization initiator with respect to 100 parts by mass of the sum of the (meth)acrylic-based monomer, the (meth)acrylic-based oligomer and the surface modifier, wherein the ten-hour half-life temperature of the thermal polymerization initiator is 80° C.-130° C.
Dependencies are inferred from the claim text.