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tac primer coating with improved adhesion

A technology for primers and laminates, applied in the direction of coatings, primers, cellulose plastic material layered products, etc., can solve problems such as delamination

Active Publication Date: 2021-06-22
ESSILOR INT CIE GEN DOPTIQUE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Despite advances in adhesive primers for polarizing films, the potential for delamination remains

Method used

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  • tac primer coating with improved adhesion
  • tac primer coating with improved adhesion
  • tac primer coating with improved adhesion

Examples

Experimental program
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Effect test

example 1

[0036] Primer formulations and casting

[0037] Step One: Primer Formulation and Coating on TAC Polar Laminate

[0038] The comparative primer solution consisted of a base primer or a base primer combined with a crosslinker, the base primer solution serving as a control. The base primer formulation comprises an acrylic polymer resin (MW ~10,000 to ~100,000), a reactive acrylic oligomer, and a UV or thermal initiator. An exemplary, non-limiting crosslinking agent employed in the examples is pentaerythritol triacrylate. However, other compounds that function to crosslink the base primer component are also effective. Solvents are used to reduce the solids content of the base and modified primers.

[0039] The primer formulations were checked for bond strength using TAC polarizing laminates cast with polymerizable materials. The laminate used for the following experiments was a TAC-PVA-TAC polarizing laminate.

[0040] The base primer and the modified primer were coated on bo...

example 2

[0049] Primer formulations for TAC film laminates

[0050] TAC laminate with polyether block amide film via primed TAC film

[0051] A clear TAC film (Lofo 916) was coated using Primer #5 primer formulation. The coated TAC film was then UV cured to obtain a primed TAC film. The coated TAC film was bonded to a polyether block amide (Pebax) photochromic film (supplied by Transition) by roll lamination at 15 psi using a two-part polyurethane adhesive (U09FL, supplied by Loctite). )laminated. The laminate was then cured at room temperature for 24 hours. The resulting photochromic laminates exhibit excellent adhesion between the TAC and polyether block amide interface. Peel force was measured by Mark 10 equipment with a median value greater than 18 N / inch. Therefore, it is considered that the TAC membrane exhibits very good adhesion to the Pebax membrane.

[0052] In a comparative example, the same two-component polyurethane adhesive was used to laminate the TAC and polyether...

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Abstract

Disclosed herein is an enhanced primer formulation that can be used in a variety of lens and film laminate applications. The enhanced primer formulations may be used to enhance adhesion between films or laminates and polymerizable or polymeric materials.

Description

Technical field [0001] The present invention relates to the field of ophthalmic lenses, including polarized and / or photochromic ophthalmic lenses for spectacles and sunglasses. Background technique [0002] TAC polarizing films are widely used in sunglass lens applications due to their excellent optical and mechanical properties. In one specific application, TAC polarizing film is used in the casting of polyallyl diglycol carbonate (CR-39) lenses. The TAC polarizing laminate is placed in polycarbonate allyl diglycol ester monomer and the monomers are polymerized to provide a solid polarized lens with the polarizing laminate embedded within the lens. The embedded polarizing laminate provides polarizing functionality and is protected by the surrounding polymeric material. [0003] Although the laminate is embedded in a polymeric material, the potential for delamination still exists. Rx laboratory processing conditions using best lens practices including lens generation, fin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D4/06C09D5/00B32B7/12
CPCB32B7/12C09D4/06C09D5/002C08F265/06B32B23/08B32B23/04B32B27/08B32B27/34B32B27/365B32B27/308B32B27/36B32B27/285B32B2307/40B32B2551/00C08F222/104C08F222/1065B32B2307/42G02B5/305B32B37/12B32B2037/1269B32B2305/72C08J5/124C08J7/043C08J2301/12
Inventor P·江C·泰M·庞德尔斯
Owner ESSILOR INT CIE GEN DOPTIQUE