Coating agents and thermoplastic resin films coated therewith

• US 4,420,530 A
• Filed: 03/08/1982
• Issued: 12/13/1983
• Est. Priority Date: 03/12/1981
• Status: Expired due to Term

• Current Assignee: Oji-Yuka Synthetic Paper Co., Ltd.
• Original Assignee: OJI YUKA Goseishi Kabushiki Kaisha
• Inventors: Toyoda, Takashi, Yamanaka, Masaaki, Ohba, Yozo, Shirai, Kanji
• Primary Examiner(s): HERBERT JR, THOMAS
• Application Number:
  US06/356,149
• Time in Patent Office: 645 Days
• Field of Search: 428/474.4, 428/340, 428/409, 428/523, 428/516, 428/341, 428/537, 428/476.3, 428/476.9, 428/323, 156/229, 156/282, 524/101
• US Class Current: 428/323
• CPC Class Codes: B32B 2307/516 mono-axially
• CPC Class Codes: B32B 2307/75 Printability
• CPC Class Codes: B32B 27/14 next to a particulate layer
• CPC Class Codes: B32B 27/32 comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: C08J 2323/02 not modified by chemical after treatment
• CPC Class Codes: C08J 7/0427 with only one layer of a composition containing a polymer binder with more layers C08J7/042
• CPC Class Codes: C08J 7/043 Improving the adhesiveness of the coatings per se, e.g. forming primers adhesives in the form of films or foils characterised by the primer layers between the polymer carriers and the adhesives C09J7/50
• CPC Class Codes: C08J 7/044 Forming conductive coatings; Forming coatings having anti-static properties
• CPC Class Codes: C08L 2666/14 Macromolecular compounds according to C08L59/00 - C08L87/00; Derivatives thereof
• CPC Class Codes: C08L 63/00 Compositions of epoxy resins; Compositions of derivatives of epoxy resins
• CPC Class Codes: C08L 79/02 Polyamines
• CPC Class Codes: C09D 133/062 Copolymers with monomers not covered by C09D133/06
• CPC Class Codes: Y10S 428/91 Product with molecular orientation
• CPC Class Codes: Y10T 428/25 Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
• CPC Class Codes: Y10T 428/273 of coating
• CPC Class Codes: Y10T 428/31 Surface property or characteristic of web, sheet or block
• CPC Class Codes: Y10T 428/31725 Of polyamide
• CPC Class Codes: Y10T 428/3175 Next to addition polymer from unsaturated monomer[s]
• CPC Class Codes: Y10T 428/31757 Polymer of monoethylenically unsaturated hydrocarbon
• CPC Class Codes: Y10T 428/31913 Monoolefin polymer
• CPC Class Codes: Y10T 428/31938 : Polymer of monoethylenically unsaturated hydrocarbon

Abstract

A water-soluble coating composition adapted for imparting appropriate printing, especially off-set printing, and processing characteristics to a thermoplastic resin film to be used as a synthetic paper and a coated film prepared with the composition are provided. The coating composition comprises (A) 100 parts by weight of a water-soluble polymer containing tertiary or quaternary nitrogen, (B) 5 to 75 parts by weight of a water-soluble polyaminepolyamideepichlorohydrin adduct, and (C) 5 to 100 parts by weight of a water-soluble polyimine compound.

Claims

1. A coated film having excellent printability which comprises a base film having a surface layer of a polyolefin film containing an inorganic fine powder, said film having on the surface thereof 5 cracks/mm² or more and which cracks are 0.1 to 10 microns in width and 0.3 to 30 microns in length and a coating layer formed on the surface film layer, said coating layer having been formed by coating the surface film layer with an aqueous solution of a resin composition and drying the coating solution, said coating layer containing 0.005 to 1 g/m² of the solid content of said aqueous solution, said resin composition comprising:

(A) 100 parts by weight of a water-soluble polymer containing tertiary or quarternary nitrogen;

(B) 5 to 75 parts by weight of a water-soluble polyaminepolyamide-epichlorohydrin adduct; and

(C) 5 to 100 parts by weight of a water-soluble polyimine compound selected from the group consisting of polyethyleneimine, poly(ethyleneimine-urea) and ethyleneimine adducts of polyaminepolyamide.

2. The coated film according to claim 1, in which the polyolefin film layer containing the fine inorganic powder has been oriented.

3. The coated film according to claim 1, in which said base film is a film of at least 3-ply laminated structure having the polyethylene film layers containing the fine inorganic powder as both outer surface layers of the film, and the polyolefin film layers have been stretched monoaxially.

4. The coated film according to claim 1, in which the fine inorganic powder is calcium carbonate of a particle size of 0.1 to 10 microns, and the content thereof in said polyolefin layer is 10 to 200 parts by weight for 100 parts by weight of the polyolefin.

5. The coated film according to claim 1, in which said resin composition forming the coating layer further comprises (D) 5 to 40 parts by weight of a water-soluble inorganic salt.

6. The coated film according to claim 1 in which the component (A) is an ampholytic polymer obtained by quaternizing with a cationizing agent a tertiary nitrogen atom in a copolymer of:

(a) 20 to 40% by weight of a component represented by the formula ##STR4## (b) 6 to 80% by weight of a component represented by the formula ##STR5## (c) 0 to 20% by weight of another hydrophobic vinyl monomer, wherein, R¹ stands for H or CH₃, R² stands for an alkyl group having 1 to 18 carbon atoms, R³ and R⁴ stand for H or an alkyl group having 1 or 2 carbon atoms, respectively, and A stands for an alkylene group having 2 to 6 carbon atoms.

7. The coated film according to claim 1, in which the component (B) is an epichlorohydrin adduct of a polyamide composed of adipic acid and diethylenetriamine.