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Primer composition for optical film

A composition, primer layer technology, applied in the directions of optics, primers, film/flake adhesives, etc., can solve problems such as difficulty in providing strong adhesion

Active Publication Date: 2016-08-24
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the field of polymer films, a problem often encountered is the difficulty of providing strong adhesion between the substrate and the functional coating applied to the substrate

Method used

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  • Primer composition for optical film
  • Primer composition for optical film
  • Primer composition for optical film

Examples

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example

[0090] Advantages and embodiments of this disclosure are further illustrated by the following examples, but the particular materials and amounts thereof recited in these examples, as well as other conditions and details, should not be construed to unduly limit this disclosure. In these examples, all percentages, proportions and ratios are by weight unless otherwise indicated.

[0091] These abbreviations are used in the following examples: g = gram; min = minute; mol = mole; hr = hour; mL = milliliter; nm = nanometer; wt = weight; fpm = feet per minute; psi = pound per square inch; kPa = KiloPascals; PSA = Pressure Sensitive Adhesive. Chemicals were purchased from Sigma-Aldrich (St. Louis, MO) if not otherwise indicated.

[0092] material list

[0093]

[0094]

[0095]

[0096] Synthesis of Polyurethane Dispersion 3

[0097] Based on a 1 lb / 100 lb loading, the isocyanate terminated prepolymer was prepared as follows. 2-Butanone (70% solids) with dibutyltin di...

example 1

[0117] Coating solutions were prepared as described in "General Procedure for Solution Preparation" using PUD-1 as the main binder and AIC-2 as the crosslinker. Films were made and processed as described in "Multilayer Optical Films with PET Skins" and "Coating and Stentering Procedures". The resulting treated films were made into glass / PVB / film / PVB / glass constructions and tested as described in "Preparation and Testing of Glass Laminates". The results are shown in Table 1.

example 2

[0119] Coating solutions, films and laminates were prepared and tested as described above for Example 1, except that slip agent was added such that the level of slip particles was 2.5% by weight of the dry coating. The results are shown in Table 1.

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Abstract

The present disclosure provides articles and laminates comprising: a substrate having a first polyester surface and a second polyester surface; a crosslinked polyurethane-based primer, the crosslinked a polyurethane-based primer coated on at least the first polyester surface; and an optically clear heat-activated adhesive adjacent to the cross-linked polyurethane-based primer. The articles and laminates are prepared by applying a polyurethane-based dispersion and a crosslinker to at least one polyester surface; drying the applied coating; heating while stretching the substrate and the coating , to form a crosslinked primer layer on the stretched polyester surface; and applying an optically clear heat-activated adhesive to the crosslinked primer layer.

Description

technical field [0001] The present disclosure relates generally to optical films and laminates, and in particular to primer compositions suitable for improving adhesion to optical films. Background technique [0002] In the field of polymer films, a problem is often encountered: the difficulty of providing strong adhesion between a substrate and a functional coating applied to the substrate. This is especially true for polyester based substrates. To solve this problem, a primer layer or coating is often applied to the polyester substrate in order to improve the adhesion between the substrate and the functional coating. [0003] Among the primer technologies that have been used to provide improved adhesion between polyester-based substrates and functional coatings applied to the substrate: Improving adhesion at subfreezing temperatures using aminosilane coatings Adhesion, as described in U.S. Patent No. 5,064,722 (Swofford et al.); improved adhesion to polyvinyl alcohol usi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B7/12B32B27/06C09J7/00B05D5/00C09J7/50
CPCC09J2475/003G02B1/04B32B17/10036B32B17/10761C09J7/50C09J2467/006C08G18/4825C08G18/6692C08G18/758C08G18/0823C08G18/10C08G18/12C09D175/08C08G18/348C08G18/4808Y10T428/31565Y10T428/2826B32B17/10688B32B17/10743B32B17/10788C09J2301/302C09J2301/304B32B17/10C08L33/26C08L75/04C08G18/3228C08G18/3851C08G18/8061B32B17/10005B32B2367/00C09D5/002C09J7/255C08J7/043B32B17/10779B32B7/12C08J2367/00C09J2301/312B32B33/00B32B2250/02B32B2250/03B32B2250/40B32B2255/10B32B2255/26B32B2315/08B32B2405/00B32B2419/00C09J2475/006
Inventor 钱之华C·P·格拉克G·F·金P·S·威利特C·A·哈克R·K·泰里
Owner 3M INNOVATIVE PROPERTIES CO