Composition for coating plastic substrate, coating film formed therefrom, and formed body

• US 8,426,027 B2
• Filed: 03/19/2009
• Issued: 04/23/2013
• Est. Priority Date: 03/27/2008
• Status: Active Grant

• Current Assignee: Fujikura Kasei Company Limited
• Original Assignee: Fujikura Kasei Company Limited
• Inventors: Kawabata, Shuhei, Kawai, Kenji
• Primary Examiner(s): Tran, Thao T.
• Application Number:
  US12/934,184
• Publication Number:
  US 20110014477A1
• Time in Patent Office: 1,496 Days
• Field of Search: 428/423.1, 524/196, 522/78
• US Class Current: 428/423.1
• CPC Class Codes: C08G 18/673 containing two or more acrylate or alkylacrylate ester groups
• CPC Class Codes: C08G 18/73 acyclic
• CPC Class Codes: C08G 18/75 cycloaliphatic
• CPC Class Codes: C08J 2369/00 Characterised by the use of polycarbonates; Derivatives of polycarbonates
• 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 7/046 Forming abrasion-resistant coatings; Forming surface-hardening coatings
• CPC Class Codes: C08K 3/36 Silica
• CPC Class Codes: C08K 9/04 Ingredients treated with organic substances treated with macromolecular compounds C08K9/08
• CPC Class Codes: C09D 175/16 having terminal carbon-to-carbon unsaturated bonds
• CPC Class Codes: C09D 7/62 modified by treatment with other compounds
• CPC Class Codes: Y10T 428/31507 Of polycarbonate
• CPC Class Codes: Y10T 428/31551 Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]

Abstract

The present invention relates to a composition for coating a plastic substrate, a coating film formed therefrom and a molded body. The composition can form a coating film that exhibits favorable adhesion to plastic substrates, as well as excellent abrasion resistance and weather resistance. The coating film-forming components of the composition include silica particles having (meth)acryloyl groups, a hexafunctional or higher aliphatic urethane(meth)acrylate, and an active energy beam-curable compound having an alicyclic structure, wherein the amount of the silica particles is within a range from 1.0 to 40 mass %, relative to 100 mass % of the coating film-forming components.

Claims

1. A composition for coating a plastic substrate, said composition comprising, as coating film-forming components;

silica particles having (meth)acryloyl groups;

a hexafunctional or higher aliphatic urethane (meth)acrylate; and

urethane (meth)acrylates having an alicyclic structure as an active energy beam-curable compound having an alicyclic structure;

wherein an amount of said silica particles having (meth)acryloyl groups is within a range of 1.0 to 40 mass %, relative to 100 mass % of said coating film-forming components, an average particle size of said silica particles having (meth)acryloyl groups is within a range of 5 to 600 nm, and said composition for coating a plastic substrate does not contain aromatic urethane (meth)acrylates.

2. The composition for coating a plastic substrate according to claim 1, wherein an amount of said aliphatic urethane (meth) acrylate is within a range of 10 to 60 mass %, relative to 100 mass % of said coating film-forming components.

3. The composition for coating a plastic substrate according to claim 1, wherein an amount of said active energy beam-curable compound is within a range of 5 to 60 mass %, relative to 100 mass % of said coating film-forming components.

4. The composition for coating a plastic substrate according to claim 1, further comprising 1 to 20 parts by mass of a photopolymerization initiator relative to 100 parts by mass of said coating film-forming components.

5. The composition for coating a plastic substrate according to claim 1, wherein the average particle size of said silica particles having (meth)acryloyl groups is within a range of 10 to 300 nm.

6. The composition for coating a plastic substrate according to claim 1, wherein the average particle size of said silica particles having (meth)acryloyl groups is within a range of 10 to 200 nm.

7. A coating film, formed from the composition for coating a plastic substrate according to claim 1.

8. A formed body, comprising a plastic substrate and a coating film according to claim 7 coated thereon.