Glass coated polycarbonate articles

• US 4,200,681 A
• Filed: 11/13/1978
• Issued: 04/29/1980
• Est. Priority Date: 11/13/1978
• Status: Expired due to Term

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Hall, Walter L., Humphrey, James S. Jr.
• Primary Examiner(s): Hoffman, James R.
• Application Number:
  US05/959,586
• Time in Patent Office: 533 Days
• Field of Search: 428/412, 427/45, 427/109, 427/162, 427/163, 427/164, 427/248 G
• US Class Current: 428/412
• CPC Class Codes: B29D 11/00865 Applying coatings; tinting; colouring printing, marking or copying processes B41M; identification in general G09F3/00; producing decorative effects in general B44C; positioning or marking of lenses B24B13/0055
• CPC Class Codes: C03C 2201/02 Pure silica glass, e.g. pure fused quartz
• CPC Class Codes: C03C 2201/06 Doped silica-based glasses
• CPC Class Codes: C03C 2203/40 Gas-phase processes
• CPC Class Codes: C03C 3/06 with more than 90% silica by weight, e.g. quartz C03C3/045 takes precedence
• CPC Class Codes: C08J 2369/00 Characterised by the use of polycarbonates; Derivatives of polycarbonates
• CPC Class Codes: C08J 7/0423 with at least one layer of inorganic material and at least one layer of a composition containing a polymer binder
• 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: C23C 14/024 Deposition of sublayers, e.g. to promote adhesion of the coating C23C14/027 takes precedence
• CPC Class Codes: C23C 14/10 Glass or silica
• CPC Class Codes: Y10T 428/31507 Of polycarbonate
• CPC Class Codes: Y10T 428/31645 Next to addition polymer from unsaturated monomers

Abstract

An abrasion, scratch, mar and solvent resistant glass coated non-opaque shaped polycarbonate article comprising a polycarbonate substrate having deposited on the surface thereof (i) an intermediate primer layer containing the photoreaction products of certain polyfunctional acrylic monomers; and (ii) a top layer of vapor deposited glass.

Claims

1. A shaped non-opaque polycarbonate article having improved mar, abrasion, scratch and organic solvent resistance comprising a polycarbonate substrate having deposited thereon (i) a primer coating layer comprised of the photoreaction product of at least one polyfunctional acrylic monomer represented by the general formula ##STR14## wherein n is an integer having a value of from 2 to 4, and R is a n valent hydrocarbon radical, n valent substituted hydrocarbon radical, n valent hydrocarbon radical containing at least one ether linkage, and a n valent substituted hydrocarbon radical containing at least one ether linkage;

and (ii) a thin top layer of vapor deposited glass on said primer coating layer.

2. The article of claim 1 wherein said n valent hydrocarbon radical is an n valent aliphatic hydrocarbon radical, said n valent substituted hydrocarbon radical is a n valent substituted aliphatic hydrocarbon radical, said n valent hydrocarbon radical containing at least one ether linkage is a n valent aliphatic hydrocarbon containing at least one ether linkage, and said n valent substituted hydrocarbon radical containing at least one ether linkage is a n valent substituted aliphatic hydrocarbon radical containing at least one ether linkage.

3. The article of claim 2 wherein said n valent aliphatic hydrocarbon radical and n valent substituted aliphatic hydrocarbon radical contain from 1 to about 20 carbon atoms.

4. The article of claim 2 wherein said n valent aliphatic hydrocarbon radical containing at least one ether linkage and n valent substituted aliphatic hydrocarbon radical containing at least one ether linkage contain from 2 to about 20 carbon atoms and from 1 to about 5 ether linkages.

5. The article of claim 1 wherein said primer coating layer is comprised of the photoreaction product of ethyleneglycol diacrylate and pentaerythritol triacrylate.

6. The article of claim 1 wherein said vapor deposited layer of glass is comprised substantially of SiO_x wherein x ranges from 1 to 2.

7. The article of claim 6 wherein x is 2.

8. A shaped, non-opaque polycarbonate article having improved mar, abrasion, scratch and organic solvent resistance, said article being obtained by (i) applying to a polycarbonate substrate a photocurable primer coating composition comprised of (a) a photosensitizer, and (b) at least one photocurable, polyfunctional acrylic monomer represented by the general formula ##STR15## wherein n is an integer having a value of from 2 to 4, and R is a n valent hydrocarbon radical, n valent substituted hydrocarbon radical, n valent hydrocarbon radical containing at least one ether linkage, and a n valent substituted hydrocarbon radical containing at least one ether linkage;

(ii) exposing said primer coating composition to ultraviolet light for a period of time sufficient to photocure said coating composition, thereby producing a hard primer coating layer on said polycarbonate substrate; and

(iii) vapor depositing a thin layer of glass onto said primer coating layer.

9. The article of claim 8 wherein said n valent hydrocarbon radical is a n valent aliphatic hydrocarbon radical, said n valent substituted hydrocarbon radical is a n valent substituted aliphatic hydrocarbon radical, said n valent hydrocarbon radical containing at least one ether linkage is a n valent aliphatic hydrocarbon radical containing at least one ether linkage, and said n valent substituted hydrocarbon radical containing at least one ether linkage is a n valent substituted aliphatic hydrocarbon radical containing at least one ether linkage.

10. The article of claim 9 wherein said n valent aliphatic hydrocarbon radical and n valent substituted aliphatic hydrocarbon radical contain from 1 to about 20 carbon atoms.

11. The article of claim 9 wherein said n valent aliphatic hydrocarbon radical containing at least one ether linkage and said n valent substituted aliphatic hydrocarbon radical containing at least one ether linkage contain from 2 to about 20 carbon atoms and from 1 to about 5 ether linkages.

12. The article of claim 8 wherein said primer coating composition contains ethyleneglycol diacrylate and pentaerythritol triacrylate.

13. The article of claim 8 wherein said glass layer is comprised substantially of SiO_x wherein x ranges from 1 to 2.

14. The article of claim 13 wherein x is 2.

15. The article of claim 8 wherein said glass layer is vaporized by means of radio frequency induction heating.