Optically diffusive adhesive and method of making the same

A technology of adhesives and light diffusion, applied in the direction of adhesive types, ester copolymer adhesives, polymer adhesive additives, etc., can solve problems such as errors, and achieve the effect of changing transparency

Inactive Publication Date: 2015-04-29
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ability to simultaneously control haze and clarity has been largely a matter of blind trial and error for any given light diffusing adhesive composition

Method used

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  • Optically diffusive adhesive and method of making the same
  • Optically diffusive adhesive and method of making the same
  • Optically diffusive adhesive and method of making the same

Examples

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example

[0083] All parts, percentages, ratios, etc. in the examples and in the remainder of the specification are by weight unless otherwise indicated.

[0084] Acronym

[0085]

[0086] Light transmission and haze and clarity testing

[0087] Adhesive samples to be tested were prepared by transferring the adhesive from a release liner to a glass microscope slide.

[0088] Light transmission, haze, and clarity were measured using a HAZEGARD PLUS haze meter from BYK-Gardner Inc. (Silver Springs, MD).

preparation example 1

[0090] A monomer premix was prepared by mixing IOA (96 parts), AA (4 parts) and IRG651 (0.04 parts). The mixture was purged with nitrogen for at least 10 minutes. The mixture is then partially polymerized by exposing it to ultraviolet radiation under a nitrogen-enriched atmosphere, resulting in a coatable slurry having a viscosity of about 500-3000 cP (0.5-3 Pa-sec). To 200 grams (g) of this slurry was added 6.54 g AA, 36.36 g HEA, 4.4 g of a 10% solution of Irg651 in EHA, and 1.6 g of a 10% solution of HDDA in EHA prior to use. Mix well.

preparation example 2

[0092] A monomer premix was prepared using EHA (96 parts), HEA (4 parts) and photoinitiator IRG651 (0.04 parts). The mixture was purged with nitrogen for at least 10 minutes. The mixture is then partially polymerized by exposing it to ultraviolet radiation under a nitrogen-enriched atmosphere, resulting in a coatable slurry having a viscosity of about 500-3000 cP (0.5-3 Pa-sec). To 200 g of this slurry was added 6.55 g of AA, 36.36 g of HEA, 0.44 g of IRG651 and 1.6 g of a 10% solution of HDDA in EHA and then mixed well before use.

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Abstract

A method of making an optically diffusive adhesive comprises: preparing a first adhesive composition comprising first particles dispersed in an optically clear adhesive matrix; determining a first haze and a first clarity of the first adhesive composition; and based upon the first haze and the first clarity, preparing a second adhesive composition that comprises the optically clear adhesive matrix, the first particles, and second particles dispersed in the optically clear adhesive matrix. An optically diffusive adhesive comprises first and second particles dispersed in an optically clear adhesive matrix is also disclosed. The first and second particles have a higher refractive index than the optically clear adhesive matrix. Articles comprising the optically diffusive adhesive are also disclosed.

Description

technical field [0001] The present invention relates broadly to adhesive compositions. Background technique [0002] Light diffusing adhesives, and especially light diffusing pressure sensitive adhesives, having different levels of optical properties such as haze and clarity, are widely used in the field of manufacturing. However, the ability to control both haze and clarity has been largely a matter of blind trial and error for any given light diffusing adhesive composition. A predictable method that can be used to independently control the haze and clarity of an adhesive composition without undue experimentation is desired. Contents of the invention [0003] In one aspect, the present invention provides a method of making a light diffusing adhesive, the method comprising: [0004] a) preparing a first adhesive composition comprising a first weight percent of first particles dispersed in an optically clear adhesive matrix, wherein the first particles have different ref...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J11/08C09J7/00C09J7/10
CPCC08K7/16C08L33/12C08L2205/02C08L2205/18C09J11/08C09J133/12C09J7/10Y10T428/1405Y10T428/254C09J2301/302C09J2301/408C09J7/29B32B7/12B32B37/12
Inventor 谢乔远彼得·B·格拉赛尔
Owner 3M INNOVATIVE PROPERTIES CO
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