Multilayer structure polymer and resin composition together with acrylic resin film material, acrylic resin laminate film, photocurable acrylic resin film or sheet, laminate film or sheet and laminate molding obtained by laminating thereof
View Patent ↗An acrylic resin film material comprising at least a multilayer structure polymer with a particular structure prevent a molded item from being whitened during insert- or in-mold molding and meet the requirement for surface hardness, heat resistance, and transparency or matting performance for vehicle applications. It is also possible to use an acrylic resin film material exhibiting a difference of 30% or less between haze values as determined in accordance with the testing method of JIS K7136 (haze measurement method) after and before a tensile test where a test piece with a width of 20 mm is pulled under the conditions of an initial inter-chuck distance of 25 mm, a rate of 50 mm/min and a temperature of 23° C. until an end-point inter-chuck distance becomes 33 mm as well as having a pencil hardness of 2 B or higher as determined in accordance with JIS K5400.
1. A multilayer structure polymer (I) comprising
(1) an innermost layer polymer (I-A),
(2) an intermediate layer polymer (I-B) with a glass-transition temperature of 25 to 100° C. comprising a composition different from that of the innermost layer polymer (I-A), and
(3) an outermost layer polymer (I-C), wherein the innermost layer polymer comprises
(I-A1) an alkyl acrylate in 50 to 99.9 wt %,
(I-A2) an alkyl methacrylate in 0 to 49.9 wt %,
(I-A3) another monomer comprising a copolymerizable double bond in 0 to 20 wt %,
(I-A4) a multifunctional monomer in 0 to 10 wt %, and
(I-A5) a graft crosslinker in 0.1 to 10 wt %; wherein the intermediate layer polymer (I-B) comprises
(I-B1) an alkyl acrylate in 9.9 to 90 wt %,
(I-B2) an alkyl methacrylate in 9.9 to 90 wt %,
(I-B3) another monomer comprising a copolymerizable double bond in 0 to 20 wt %,
(I-B4) a multifunctional monomer in 0 to 10 wt %, and
(I-B5) a graft crosslinker 0.1 to 10 wt %; and wherein the outermost layer polymer (I-C) comprises
(I-C1) an alkyl methacrylate in 80 to 100 wt %,
(I-C2) an alkyl acrylate in 0 to 20 wt %, and
(I-C3) another monomer comprising a copolymerizable double bond in 0 to 20 wt %.
2. An acrylic resin film material (A) comprising the multilayer structure polymer (I) as claimed in claim 1 .
3. The acrylic resin film material (A) as claimed in claim 2 , further comprising a matting agent.
4. The acrylic resin film material (A) as claimed in claim 2 , wherein at least one side has a 60° surface glossiness of 100% or less.
5. The acrylic resin film material (A) as claimed in claim 2 , wherein a heat distortion temperature as determined in accordance with ASTM D648 is 80° C. or higher.
6. A monolayered acrylic resin film material (A) exhibiting a difference of 30% or less between haze values as determined in accordance with the testing method of JIS K7136 (haze measurement method) after and before a tensile test where a test piece with a width of 20 mm is pulled under the conditions of an initial inter-chuck distance of 25 mm, a rate of 50 mm/min and a temperature of 23° C. until an end-point inter-chuck distance becomes 33 mm as well as having a pencil hardness of 2 B or higher as determined in accordance with JIS K5400.
7. The acrylic resin film material (A) as claimed in claim 6 , wherein at least one side has a 60° surface glossiness of 100% or less.
8. The acrylic resin film material (A) as claimed in claim 6 , wherein a heat-distortion point as determined in accordance with ASTM D648 is 80° C. or higher.