Double-Sided Self-Adhesive Products with High Optical Quality

Patent metadata

Field	Value
Publication number	US-2016355706-A1
Application number	US-201615240737-A
Country	US
Kind code	A1
Filing date	Aug 18, 2016
Priority date	Apr 26, 2010
Publication date	Dec 8, 2016
Grant date	—

Abstract

The invention relates to a double-sidedly pressure-sensitively adhesive product having a haze value (measured by test method B) of 5% or less, comprising a carrier having a first surface and a second surface, and also a first layer of pressure-sensitive adhesive, disposed on the first surface of the carrier, and a second layer of pressure-sensitive adhesive, disposed on the second surface of the carrier, characterized in that the carrier has a modulus of elasticity of 2.5-500 MPa.

First claim

1 . A process for adhesive bonding of optical components comprising applying a double-sided pressure-sensitive adhesive product to optical components,
wherein the adhesive product comprises, (i) a carrier having a first surface and a second surface, and (ii) a first layer of pressure-sensitive adhesive, disposed on the first surface of the carrier, and (iii) a second layer of pressure-sensitive adhesive, disposed on the second surface of the carrier, and wherein the carrier has a modulus of elasticity of 2.5-500 MPa, and the adhesive product has a haze value of 5% or less as measured by ASTM D1003.

2 . The process of claim 1 , wherein the carrier has a modulus of elasticity of 5-250 MPa.

3 . The process of claim 1 , wherein the difference in the refractive indices of the first and second layers of pressure-sensitive adhesive in relation to the refractive index of the carrier is in each case less than 0.1.

4 . (canceled)

5 . The process of claim 1 , wherein the optical components have topographical height differences of more than 100 μm.

6 . (canceled)

7 . The process of claim 1 , wherein at least one of the optical components is transparent.

8 . The process of claim 1 , wherein the carrier has a layer thickness of between 100 μm to 1000 μm.

9 . The process of claim 1 , wherein the carrier has a layer thickness of between 250 μm to 500 μm.

10 . The process of claim 1 , wherein the carrier has a layer thickness of between 125 μm to 250 μm.

11 . The process of claim 1 , wherein the carrier is made from a non-thermoplastic elastomer.

12 . The process of claim 1 , wherein the carrier is made from a thermoplastic elastomer selected from the group consisting of semicrystalline polymers, polyolefins, ethylene-vinyl acetate (EVA), ethylene-acrylate (EA), ethylene-methacrylate (EMA), low density polyethylene (PE-LD), linear low density polyethylene (PE-LLD), very low density linear polyethylene (PE-VLD), polypropylene homopolymer (PP-H), impact or random polypropylene copolymer (PP-C), soft polyethylene elastomers, soft polypropylene copolymers, and elastomeric heterophase polyolefin.

13 . The process of claim 1 , wherein the carrier is selected from the group consisting of crosslinked (meth)acrylate copolymer-based elastomers.

14 . The process of claim 1 , wherein the carrier comprises a (meth)acrylate block copolymer.

15 . The process of claim 1 , wherein the carrier comprises a polymethylmethacrylate-polybutylacrylate-polymethylmethacrylate block copolymer.

Assignees

• Tesa Se

Inventors

• Dollase Thilo
• Koop Matthias
• Schreiber Ralph

Classifications

• B29L2011/00

  Optical elements, e.g. lenses, prisms · CPC title

• B32B37/1284

  Application of adhesive · CPC title

• B29K2669/00

  Use of {PC, i.e.} polycarbonates {or derivatives thereof} for preformed parts, e.g. for inserts · CPC title

• C09J5/00

  Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers · CPC title

• C09J7/38

  Pressure-sensitive adhesives [PSA] · CPC title