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US4477303A Expired / Lapsed US ⏱️ 0.0 years remaining

Process for preparation of surface-protecting acrylic film

Assignee: Mitsubishi Chemical Corp
•
Filing: 1982-02-03
•
Granted: 1984-10-16
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Expires: 2002-02-03
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Abstract

Abstract An improved process for preparing a laminate polymer article having an alkyl methacrylate polymer film uniformly laminated on at least one surface of the body of a polymer article formed from a prepolymer composition containing a polymerizable monomer, a solvent or a mixture thereof is disclosed. A composite acrylic film comprising (a) a carrier film insoluble in the polymerizable monomer and the solvent and (b) an alkyl methacrylate polymer film soluble in or swellable with the polymerizable monomer and the solvent, said carrier film and said alkyl methacrylate polymer film being adhered to each other through an adhesive layer capable of adhering relatively weakly to the alkyl methacrylate film and adhering relatively strongly to the carrier film and incapable of being dissolved in the polymerizable monomer and the solvent, is laminated on the prepolymer composition so that the alkyl methacrylate polymer film is in contact with the surface of the prepolymer composition; the prepolymer composition is polymerized; and then, the carrier film is peeled together with the adhesive layer from the resulting polymer article.

Inventors

  • 👤 Makoto Ohe
  • 👤 Koichiro Sugi

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 16:58
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/30; B32B27/308; B32B27/36; B32B7/00; B32B7/04; B32B7/12; Y; Y10; Y10T; Y10T428/00; Y10T428/14; Y10T428/1424; Y10T428/31504; Y10T428/31536; Y10T428/31855; Y10T428/31935; Y10T428/31938

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 178 words
In a process for preparing a laminate polymer article having an alkyl methacrylate polymer film uniformly laminated on at least one surface of the body of a polymer article formed from a prepolymer composition containing said prepolymer composition in combination with a polymerizable monomer, a solvent or a mixture thereof, the improvement comprising: laminating on the prepolymer composition a composite acrylic film comprising (i) a carrier film insoluble in the polymerizable monomer and the solvent and (ii) an alkyl methacrylate polymer film soluble in or swellable with the polymerizable monomer and the solvent, said carrier film and said alkyl methacrylate polymer film being adhered to each other through an adhesive layer capable of adhering relatively weakly to the alkyl methacrylate film and adhering relatively strongly to the carrier film and incapable of being dissolved in the polymerizable monomer and the solvent, so that the alkyl methacrylate polymer film is in contact with the surface of the prepolymer composition; polymerizing the prepolymer composition; and then, peeling the carrier film together with the adhesive layer from the resulting polymer article.
Claim 2
Dependent Claim 178 words
In a process for preparing a laminate polymer article having an alkyl methacrylate polymer film uniformly laminated on at least one surface of the body of a polymer article formed from a prepolymer composition containing said prepolymer composition in combination with a polymerizable monomer, a solvent or a mixture thereof, the improvement comprising: laminating on the prepolymer composition a composite acrylic film comprising (i) a carrier film insoluble in the polymerizable monomer and the solvent and (ii) an alkyl methacrylate polymer film soluble in or swellable with the polymerizable monomer and the solvent, said carrier film and said alkyl methacrylate polymer film being adhered to each other through an adhesive layer capable of adhering relatively weakly to the alkyl methacrylate film and adhering relatively strongly to the carrier film and incapable of being dissolved in the polymerizable monomer and the solvent, so that the alkyl methacrylate polymer film is in contact with the surface of the prepolymer composition; polymerizing the prepolymer composition; and then, peeling the carrier film together with the adhesive layer from the resulting polymer article.
Claim 3
Dependent Claim 38 words
A process for the preparation of a laminate polymer article according to claim 1, wherein the prepolymer containing the polymerizable monomer, the solvent or the mixture thereof is a glass fiber-reinforced unsaturated polyester prepolymer containing a styrene monomer.
Claim 4
Dependent Claim 26 words
A process for the preparation of a laminate polymer article according to claim 1 or 2, wherein the carrier film is insoluble in a styrene monomer.
Claim 5
Dependent Claim 23 words
A process for the preparation of a laminate polymer article according to claim 3, wherein the carrier film is a saturated polyester film.
Claim 6
Dependent Claim 33 words
A process for the preparation of a laminate polymer article according to any one of claims 1, 2 and 4, wherein the adhesive layer is composed of a vinyl chloride/vinyl acetate/acrylic copolymer emulsion.

References Cited (Backward Citations)

US3562235A Cited
US4243462A Cited
US4131635A Cited
US4339485A Cited
US4254186A Cited
US4367312A Cited
US4333987A Cited
US4379039A Cited
US4361626A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1987-10-16 1988-04-16 1988-10-16 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1991-10-16 1992-04-16 1992-10-16 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1995-10-16 1996-04-16 1996-10-16 $7700.00 Window Closed / Lapsed

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