Photocurable Primer Composition And Coated Structure Comprising Cured Primer Composition

• US 20110195256A1
• Filed: 08/25/2009
• Published: 08/11/2011
• Est. Priority Date: 08/28/2008
• Status: Abandoned Application

• Current Assignee: Dow Corning Toray Company Limited (Dow, Inc.)
• Original Assignee: Dow Corning Toray Company Limited (Dow, Inc.)
• Inventors: Morikawa, Ikutaro, Sasaki, Motoshi
• Application Number:
  US13/060,798
• Publication Number:
  US 20110195256A1
• Time in Patent Office: Days
• US Class Current: 428/412
• CPC Class Codes: C09D 4/00 Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
• CPC Class Codes: C09D 5/002 Priming paints C09D5/08 takes precedence
• CPC Class Codes: Y10T 428/31507 Of polycarbonate
• CPC Class Codes: Y10T 428/31663 As siloxane, silicone or silane

Abstract

To provide a photocurable primer composition that cures to form a primer layer that exhibits an excellent adhesion to substrate, a structure having this primer layer and a method of producing such a structure. A photocurable primer composition comprising (a) multifunctional acrylates, (b) organoalkoxysilane having an aliphatically unsaturated bond, (c) photopolymerization initiator, and (d) organic solvent. Also, a structure comprising a primer layer comprising the aforementioned photocurable primer composition, formed on the substrate, and a cured coating comprising (e) ultraviolet absorber and (c) photopolymerization initiator, formed on the primer layer.

Claims

1. A photocurable primer composition comprising

(a) a multifunctional acrylate or multifunctional methacrylate,

(b) an organoalkoxysilane having an aliphatically unsaturated bond,

(c) a photopolymerization initiator, and

(d) an organic solvent.

2. A structure comprising

(L1) a substrate,

(L2) a primer layer comprising the photocurable primer composition of claim 1, formed on the substrate, and

(L3) a cured coating comprising (e) ultraviolet absorber and (c) photopolymerization initiator, formed on the primer layer.

3. The structure according to claim 2, characterized in that the cured coating further comprises

(f) hindered amine-type photostabilizer.

4. The structure according to claim 2, characterized in that the substrate is a transparent substrate that has a light transmittance of at least 70% in the visible region, and wherein the structure is substantially transparent.

5. A method of producing the structure described in claim 2, said method comprising:

a step of coating the photocurable primer composition of claim 1 on a substrate;

a step of photocuring the photocurable primer composition to form a primer layer;

a step of coating, on the aforementioned primer layer, a photocuring-type coating agent comprising (e) ultraviolet absorber and (c) photopolymerization initiator; and

a step of photocuring the photocuring-type coating agent to form a cured coating comprising the (e) ultraviolet absorber and (c) photopolymerization initiator.

6. The method of producing according to claim 5, characterized in that the substrate is polycarbonate resin and the cured coating is a cured coating comprising (c) photopolymerization initiator, (e) ultraviolet absorber, and (f) hindered amine-type photostabilizer.

7. The structure according to claim 2, characterized in that the substrate is polycarbonate resin.

8. The structure according to claim 2, characterized in that the multifunctional acrylate or multifunctional methacrylate is at least difunctional and is free of fluorine and/or silicon atoms.

9. The structure according to claim 2, characterized in that the organoalkoxysilane is of the general formula R¹_aYSi(OR²)_3-a, wherein

R¹ is substituted or unsubstituted monovalent hydrocarbyl that does not contain an aliphatically unsaturated bond,

R² is alkyl,

Y is a monovalent organic group that contains an aliphatically unsaturated bond, and

a is 0 or 1.

10. The structure according to claim 9, wherein

R¹ is methyl, ethyl, propyl, butyl, isobutyl, phenyl, or fluoroalkyl,

R² is methyl, ethyl, or propyl, and

Y is an acrylic group-containing organic group, an alkenyl group, a styryl group, or a vinyl ether group.