Methacrylic resin composition, methacrylic resin film, and vinyl chloride molded article with the film layered
View Patent ↗A resin composition suitable for forming a film excellent in transparency, weatherability, hardness, shock resistance, bending-fracturing resistance, and moldability; and a film excellent in weatherability even when laminated on a molded body comprising a PVC resin composition containing a plasticizer is provided. The film having the above characteristics can be obtained by making a methacrylic resin composition into a film, the methacrylic resin composition comprising a methacrylic resin composition (C) obtained by polymerizing a methacrylate polymer (A) obtained by polymerizing a monomer mixture mainly composed of alkyl methacrylate in the presence of acrylic crosslinked elastic particles (B) obtained by copolymerizing a monomer mixture mainly composed of alkyl acrylate and a polyfunctional monomer with two or more non-conjugated double bonds per a molecule; and being copolymerized with 0.01 to 50 parts by weight of an ultraviolet absorber represented by the general formula (1).
1. A methacrylic resin composition comprising a methacrylic resin composition (C) obtained by polymerizing a methacrylate polymer (A) in the presence of acrylic crosslinked elastic particles (B),
the methacrylate polymer (A) being obtained by copolymerizing a monomer mixture (a) including 50 to 100 wt % of alkyl methacrylate and 0 to 50 wt % of alkyl acrylate,
the acrylic crosslinked elastic particles (B) being obtained by copolymerizing a monomer mixture (b) including 50 to 100 wt % of alkyl acrylate and 50 to 0 wt % of alkyl methacrylate, and a polyfunctional monomer including two or more non-conjugated double bonds per a molecule,
wherein 0.01 to 30 parts by weight based on 100 parts by weight of the methacrylic resin composition (C) of an ultraviolet absorber represented by the general formula (1) is copolymerized with said copolymerizing monomer mixture (b) and said monomer mixture (a),
(where X is H or halogen; R 1 is H, methyl, or a t-alkyl group having 4 to 6 carbons; R 2 is a linear or a branched alkylene group having 2 to 10 carbons; and R 3 is H or methyl).
2. The methacrylic resin composition (C) in accordance with claim 1 , wherein
the methacrylic resin composition (C) is a two-layer structure polymer of the acrylic crosslinked elastic particles (B), and the methacrylate polymer (A),
an average particle size of the methacrylic resin composition (C) is more than 100 nm and 400 nm or less, and
the acrylic crosslinked elastic particle (B) content is 5 to 45 wt % based on the entire methacrylic resin composition (C).
3. A film formed with the methacrylic resin composition (C) in accordance with claim 1 .
4. A laminate in which the film in accordance with claim 3 is laminated.
5. The laminate in accordance with claim 4 , produced by an injection molding.
6. A methacrylic resin film for being laminated on a molded article comprising a polyvinyl chloride resin composition containing a plasticizer,
said methacrylic resin film comprising a methacrylic resin composition (C) being obtained by polymerizing a methacrylate polymer (A) in the presence of acrylic crosslinked elastic particles (B),
the methacrylate polymer (A) being obtained by polymerizing a monomer mixture (a) including 50 to 100 wt % of alkyl methacrylate and 0 to 50 wt % of alkyl acrylate, and
the acrylic crosslinked elastic particles (B) being obtained by copolymerizing a monomer mixture (b) including 50 to 100 wt % of alkyl acrylate and 50 to 0 wt % of alkyl methacrylate, and a polyfunctional monomer including two or more non-conjugated double bonds per a molecule,
wherein 0.01 to 30 parts by weight based on 100 parts by weight of the methacrylic resin composition (C) of an ultraviolet absorber represented by the general formula (1) is copolymerized with said copolymerizing monomer mixture (b) and said monomer mixture (a),
(where X is H or halogen; R 1 is H, methyl, or a t-alkyl group having 4 to 6 carbons; R 2 is a linear or branched alkylene group having 2 to 10 carbons; and R 3 is H or methyl.)
7. The methacrylic resin film for being laminated on a molded article comprising a polyvinyl chloride resin composition containing a plasticizer in accordance with claim 6 ,
wherein the methacrylic resin composition (C) is a two-layer structure polymer of the acrylic crosslinked elastic particles (B), and the methacrylate polymer (A),
an average particle size of the methacrylic resin composition (C) is more than 100 nm and 400 nm or less, and
the acrylic crosslinked elastic particle (B) content is 5 to 45 wt % based on the entire methacrylic resin composition (C).
8. A vinyl chloride laminate comprising the methacrylic resin film for being laminated on a molded article comprising a polyvinyl chloride resin composition containing a plasticizer in accordance with claim 6 laminated on a molded article comprising a polyvinyl chloride resin composition containing a plasticizer.