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Electron beam cured, nonfunctionalized silicone pressure sensitive adhesives

A pressure-sensitive adhesive, non-functionalized technology, applied in the direction of film/sheet adhesive, adhesive, pressure-sensitive film/sheet, etc., which can solve the problems of limiting the final applicability of PSA and hindering the end-use characteristics

Inactive Publication Date: 2011-09-28
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Often, it may be advantageous to obtain silicone adhesive systems that do not require the presence of specific functional groups to achieve crosslinking, for example, where the presence of these functional groups may interfere with desired end-use properties and limit the ultimate applicability of the PSA

Method used

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  • Electron beam cured, nonfunctionalized silicone pressure sensitive adhesives
  • Electron beam cured, nonfunctionalized silicone pressure sensitive adhesives
  • Electron beam cured, nonfunctionalized silicone pressure sensitive adhesives

Examples

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example

[0044] For the examples described herein, a model CB-300 electron beam generating apparatus (available from Energy Sciences, Inc. (Wilmington, MA) equipped with a 0.076 mm (0.003 inch) thick, 30.48 cm (12 inch) Radiation treatment on a wide polyester terephthalate support film). A sample of material with a polyester release liner on both sides (i.e., closed face configuration) is placed on a support film and conveyed at a speed of about 6.1 m / min (20 ft / min) so that The release liner handles the strip from one side. The oxygen content in the electron beam chamber is limited to a range of 50 ppm to 100 ppm. The standard nitrogen gap between the window and the coil path is 47mm. Accelerating voltage and electron beam dose were recorded for each instance.

[0045] Before processing samples, electron beam equipment was calibrated according to ASTM E 1818, and dosimetry was performed using 10 micron and 45 micron dosimeters, which are polymer films containing radiochromic dyes, ...

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Abstract

Methods of preparing silicone pressure sensitive adhesives are described. The methods include electron beam curing nonfunctionalized silicone materials, e.g., silicone fluids and gums. Hot melt processing the nonfunctionalized silicone materials prior to electron beam crosslinking, and crosslinked adhesives prepared by such methods are also described. Adhesives prepared by hot melt coating and electron beam curing nonfunctionalized silicone materials and adhesive articles incorporating such adhesives are also disclosed.

Description

technical field [0001] This invention relates to silicone pressure sensitive adhesives. More specifically, the present invention describes methods for preparing pressure sensitive adhesives by electron beam curing of non-functionalized silicone materials. Also described are silicone pressure sensitive adhesives prepared from non-functionalized silicone materials that are cured by exposure to electron beam radiation, and articles employing such adhesives. Background technique [0002] Pressure sensitive adhesives (PSAs) are an important class of materials. Generally, PSAs adhere to substrates by light pressure (eg, finger pressure) and generally do not require any post-curing (eg, heat or radiation) to achieve their maximum bond strength. A variety of PSA chemistries are available including, for example, acrylic, rubber, and silicone based systems. Silicone PSAs can provide one or more of the following useful properties: adhesion to low surface energy surfaces, fast adhesi...

Claims

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Application Information

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IPC IPC(8): C08L83/04B32B27/28C08J3/28C09J183/04C09J7/38C09J7/26
CPCC09J7/0207C08J2383/04C08G77/80C08J3/28C09J7/0289C09J183/04C09J2483/00C08L83/04C09J7/38C09J7/26Y10T428/2848Y10T428/2852Y10T428/2809Y10T428/254Y10T428/249985Y10T428/31663C08L83/00B05D3/06C09J185/00
Inventor 刘军钪克莱顿·A·乔治
Owner 3M INNOVATIVE PROPERTIES CO
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