Object with matted surface and polymerization method for the production of the matting

• US 5,888,617 A
• Filed: 09/12/1996
• Issued: 03/30/1999
• Est. Priority Date: 02/26/1996
• Status: Expired due to Term

• Current Assignee: Heraeus Noblelight GmbH (Heraeus Holding GMBH)
• Original Assignee: Heraeus Noblelight GmbH (Heraeus Holding GMBH)
• Inventors: Roth, Angelika
• Primary Examiner(s): McCamish, Marion
• Assistant Examiner(s): Juska, Cheryl
• Application Number:
  US08/713,180
• Time in Patent Office: 929 Days
• Field of Search: 522/4, 428/141, 428/152, 428/413, 428/500, 427/494, 427/493, 427/496, 427/508
• US Class Current: 428/152
• CPC Class Codes: B05D 3/067 Curing or cross-linking the coating
• CPC Class Codes: B05D 3/068 using ionising radiations (gamma, X, electrons)
• CPC Class Codes: B05D 5/061 Special surface effect
• CPC Class Codes: Y10T 428/24446 Wrinkled, creased, crinkled or creped

Abstract

An object with a homogeneous matted surface is provided which can be carried out in a simple manner and at low cost. The surface of the object has a thin skin layer produced by UV polymerization at a wavelength of at most 200 nm, and a core or carrier layer, beneath the skin layer, is produced by polymerization with UV radiation of a wavelength of at least 220 nm or by electron beams. A method for producing the matted surface is also provided, wherein a film made of an organic material that can be polymerized by UV radiation or electron beams is applied to a substrate; the film is irradiated with UV radiation of a wavelength of at most 200 nm, with the production of the skin layer at the surface, in which the organic material is at least partially polymerized; and the core area of the film, beneath the skin layer, is irradiated with UV radiation having a wavelength above 220 nm or by electron beams.

Claims

1. A polymerization method for the production of a matted surface on a substrate, which consists essentially of the following steps:

application of a film made of an organic material on the substrate;

irradiation of the film with UV radiation of a wavelength of at most 200 nm, with the production of a thin skin layer, at the surface and in which the organic material is at least partially polymerized; and

polymerization of a core area of the film, placed underneath the skin layer, by means of UV radiation of a wavelength of at least 220 nm or by means of electron beams, with the production of a carrier layer made of polymerized organic material, wherein the thin skin layer is polymerized before the core area is polymerized.

2. The polymerization method according to claim 1, characterized by the fact that for the production of the skin layer, the film is irradiated with essentially monochromatic UV radiation of a wavelength around 172 nm.

3. the polymerization method according to claim 1, characterized by the fact that incoherent UV radiation of an excimer radiator is used for the production of the skin layer.

4. The polymerization method according to one of claim 1, characterized by the fact that an acrylate-containing or an epoxide-containing material is used as an organic material.

5. An object having an optically matte surface, comprising:

a substrate; and

an optically matte surface layer on the substrate;

wherein the optically matte surface layer is made by the process as claimed in claim 1; and

wherein the optically matte surface layer does not contain any matting agents.

6. The object according to claim 5, characterized by the fact that the skin layer and the carrier layer have the same chemical composition.

7. The object according to claims 5, characterized by the fact that the skin layer and the carrier layer consist of a single homogenous phase.

8. The object according to claim 5, characterized by the fact that the skin layer is produced by irradiation with UV radiation of a wavelength of 172 nm.

9. The object according to claim 5, characterized by the fact that the skin layer has a thickness in the range of 1-50 nm.

10. The object according to claim 5, characterized by the fact that the optically mable surface layer contains an acrylate, or an epoxide.