Acrylic resin composition for film

• US 10,640,620 B2
• Filed: 03/22/2013
• Issued: 05/05/2020
• Est. Priority Date: 03/22/2012
• Status: Active Grant

• Current Assignee: Mitsubishi Chemical Corporation (Mitsubishi Chemical Group Corp.)
• Original Assignee: Mitsubishi Chemical Corporation (Mitsubishi Chemical Group Corp.)
• Inventors: Ooaira, Kazuya, Abe, Junichi
• Primary Examiner(s): Figg, Travis M
• Application Number:
  US14/386,074
• Publication Number:
  US 20150044439A1
• Time in Patent Office: 2,601 Days
• CPC Class Codes: B29C 48/08 flexible, e.g. films
• CPC Class Codes: B29C 48/305 having a wide opening, e.g. for forming sheets
• CPC Class Codes: B29K 2033/12 Polymers of methacrylic acid esters, e.g. PMMA, i.e. polymethylmethacrylate
• CPC Class Codes: B29K 2105/0044 Stabilisers, e.g. against oxydation, light or heat
• CPC Class Codes: B29K 2995/0088 Molecular weight
• CPC Class Codes: B32B 2250/02 2 layers
• CPC Class Codes: B32B 2250/24 All layers being polymeric
• CPC Class Codes: B32B 2307/21 Anti-static
• CPC Class Codes: B32B 2307/306 Resistant to heat
• CPC Class Codes: B32B 2307/3065 Flame resistant or retardant, fire resistant or retardant
• CPC Class Codes: B32B 2307/4026 within the layer by addition of a colorant, e.g. pigments, dyes
• CPC Class Codes: B32B 2307/412 Transparent
• CPC Class Codes: B32B 2307/558 Impact strength, toughness
• CPC Class Codes: B32B 2307/712 Weather resistant
• CPC Class Codes: B32B 2307/732 Dimensional properties
• CPC Class Codes: B32B 25/08 of synthetic resin
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/18 characterised by the use of special additives
• CPC Class Codes: B32B 27/22 using plasticisers
• CPC Class Codes: B32B 27/28 comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
• CPC Class Codes: B32B 27/302 : comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
• CPC Class Codes: B32B 27/304 : comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
• CPC Class Codes: B32B 27/308 : comprising acrylic (co)polymers
• CPC Class Codes: B32B 27/32 : comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: B32B 27/365 : comprising polycarbonates
• CPC Class Codes: C08J 2333/06 : of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
• CPC Class Codes: C08J 2333/08 : Homopolymers or copolymers of acrylic acid esters
• CPC Class Codes: C08J 2479/04 : Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
• CPC Class Codes: C08J 5/18 : Manufacture of films or sheets
• CPC Class Codes: C08K 5/34926 : also containing heterocyclic groups other than triazine groups
• CPC Class Codes: C08L 2201/08 : Stabilised against heat, light or radiation or oxydation
• CPC Class Codes: C08L 23/10 : Homopolymers or copolymers of propene
• CPC Class Codes: C08L 33/06 : of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
• CPC Class Codes: C08L 79/02 : Polyamines
• CPC Class Codes: Y10T 428/24967 : Absolute thicknesses specified
• CPC Class Codes: Y10T 428/269 : including synthetic resin or polymer layer or component

Abstract

The purpose of the present invention is to provide an acrylic resin composition for a film having reduced bleeding and sticking to a roll during formation of an acrylic resin film. The present invention is an acrylic resin composition for a film, the composition comprising: a high-molecular-weight hindered amine-based light stabilizer (A) having a triazine backbone; and an acrylic resin (B). When this acrylic resin composition for a film is used, there is reduced bleeding to a roll surface during film formation, and minimized sticking of the film to the roll.

Claims

1. An acrylic resin film obtained from an acrylic resin composition, the acrylic resin composition comprising a high-molecular-weight hindered amine-based light stabilizer (A) having a triazine backbone and an acrylic resin (B),

wherein:

the high-molecular-weight hindered amine-based light stabilizer (A) is present in an amount of at least 0.1 parts by mass to no more than 3 parts by mass relative to 100 parts by mass of the acrylic resin (B),

the acrylic resin (B) is a rubber-containing polymer (B-1) obtained by graft polymerizing a monomeric component (B-1-b) containing an alkyl methacrylate as a main component, in the presence of a rubber polymer (B1a) obtained by polymerizing a monomeric component (B-1-a) containing an alkyl acrylate as a main component, wherein a content of the monomeric component (B-1-a) in the rubber-containing polymer (B-1) is 5 to 80 wt %, and a content of the monomeric component (B-1-b) in the rubber-containing polymer (B-1) is 15 to 90 wt %,

wherein prior to polymerizing the monomeric component (B-1-b), a monomeric component (B-1-c) containing 9.9 to 90% mass of an alkyl acrylate, 9.9 to 90% by mass of an alkyl methacrylate, 0 to 20% by mass of another monomer having a double bond that can co-polymerize with the alkyl acrylate and the alkyl methacrylate, and 0.1 to 10% by mass of a polyfunctional monomer is polymerized in the presence of a rubber polymer (B1a), and

the high-molecular-weight amine-based light stabilizer (A) comprises a structural piperidine backbone unit represented by Formula (I)

2. The acrylic resin film according to claim 1, having a thickness of 10 to 500 μ

m.

3. The acrylic resin film according to claim 2, obtained by melt extruding the acrylic resin composition, forming the extrusion into a film by a T-die method.

4. A laminate comprising the acrylic resin film according to claim 1 and a thermoplastic resin substrate.

5. The laminate according to claim 4, wherein the thermoplastic resin substrate is a polyvinyl chloride resin, ABS resin, polycarbonate resin or polyolefin resin.

6. The laminate according to claim 4, wherein the thickness of the thermoplastic resin substrate is 50 to 500 μ

m, and the thickness of the acrylic resin film is 10 to 180 μ

m.

7. A laminate comprising the acrylic resin film according to claim 3 and a thermoplastic resin substrate.

8. The laminate according to claim 7, wherein the thermoplastic resin substrate is a polyvinyl chloride resin, ABS resin, polycarbonate resin or polyolefin resin.

9. The laminate according to claim 7, wherein the thickness of the thermoplastic resin substrate is 50 to 500 μ

m, and the thickness of the acrylic resin film is 10 to 180 μ

m.

10. The acrylic resin film according to claim 1, wherein the high-molecular-weight amine-based light stabilizer (A) comprises a structural unit represented by Formula (I) wherein:

R₁ is a hydrogen atom,

R₂ is a C6 alkylene group,

R is represented by Formula (d), wherein R₁ in Formula (d) is a hydrogen atom,

B is —

N(R₇)(R₈), where R₇ is a C4 alkyl group, and R₈ is represented by Formula (d), wherein R₁ in Formula (d) is a hydrogen atom; and

both terminal groups in Formula (I) are Formula (e), wherein A and B* represent N(R₄)(R₅), each R₄ and R₅ represents a C4 alkyl group.

11. The acrylic resin film according to claim 1, wherein a content of the monomeric component (B-1-a) in the rubber-containing polymer (B-1) is 5 to 80%, and a content of the monomeric component (B-1-b) in the rubber-containing polymer (B-1) is 15 to 90% based on 100% by mass of a total content of the monomeric component (B-1-a), the monomeric component (B-1-b) and a monomeric component (B-1-c).

12. A method of forming a melt extrusion into a film by way of a T-die method, comprising melt extruding the acrylic resin composition for films according to claim 1.