Adhesive composition and method

Inactive Publication Date: 2011-04-21
TRANSHIELD INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0016]A material for shrink wrapping an article contains a shrinkable, stretchable film outer layer having a predetermined shrink response to energy such as heat energy applied to the film, and a fabric inner layer, for example a nonwoven fabric. A hot melt adhesive secures the fab

Problems solved by technology

In the military and in the transportation industry, vehicles used on ground, on air or in the sea, and the equipment placed on these vehicles are subject to corrosion as a consequence of their operational, storage or shipping environments.
Automobiles, automobile parts and other metallic industrial articles being shipped or stored are also subject to corrosion due to their environment.
Any force applying over a void can cause the cover to sag, or deform.
Dew and conde

Method used

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  • Adhesive composition and method
  • Adhesive composition and method
  • Adhesive composition and method

Examples

Experimental program
Comparison scheme
Effect test

Example

Example 1

[0146]Using a ZSK 30 mm twin-screw extruder—screw design A42723.001, at Aspen Research Inc. St. Paul, Minn., the initial integration of VCI(T) powder to the adhesive was improved dramatically in terms of speed, quality and uniformity. In this system the hot-melt adhesive is pumped from a drum to the 30 mm twin-screw extruder with the hose temperature at 155° C., melt temperature at 125° C. When the adhesive reached to the barrels the temperatures were lowered to 110° C.-120° C. range which provides a safe compounding temperature for the VCI(T) powder by preventing loss of excess VCI and burning the titanate. The SEBS rubber that makes up the matrix for the original adhesive is shear sensitive. This way it allows the twin screw turn and push it through the barrel at a lower temperature without losing shear. This allows the adhesive to be at a lower temperature suitable for VCI(T) application.

[0147]In the experimental process, vapor phase corrosion powder consisted of benzotr...

Example

Example 2

VCI Trial Production #1

[0154]Commercial razor blades are placed in a closed Zip-Lock® type bag with a 6 inch by 8 inch rectangle of laminate. The laminate is prepared by adhering a non-woven fabric to a thermoplastic film with an adhesive. In controls, the adhesive contains no VCI. In the test samples, the adhesive contains VCI particles and titanate / zirconate coupling agents as described herein. The blades and laminate are held in the bag for two hours, and then ¼ inch of water is added to the bag. After addition of water, the blades are visually inspected with a 3× magnifying glass) on a periodic basis, and the extent and kind of rust are noted over time. In the table, the numbers represent % corrosion, being that fraction of the surface of the razor that is covered with rust at the noted time. The nature of the corrosion (black oxide, gray oxide, or red oxide) is also qualitatively noted.

[0155]Sample 1 in the table is an adhesive composition with Adhesive 2 with VCI but ...

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Abstract

An adhesive composition contains a block copolymer hot melt adhesive and a vapor releasing vapor corrosion inhibitor mixed with the block copolymer hot melt adhesive, the vapor corrosion inhibitor being in the form of particles suspended in the adhesive composition, the particles preferably having a maximum dimension of less than about 30 microns. One improvement results from inclusion in the adhesive mixture of a titanium and/or zirconium containing coupling agent, either separately or as part of the VCI particles. Another improvement results from blending the adhesive mixture in a continuous process using for example a twin screw extruder. As a result, the adhesive mixture has better uniformity and superior viscosity properties during use.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a National Stage of International Application No. PCT / US2009 / 044686, filed May 20, 2009, which is a continuation of PCT International Application No. PCT / US2009 / 030541, filed Jan. 9, 2009, now withdrawn, which claims the benefit of U.S. Provisional Application No. 61 / 054,728, filed on May 20, 2008. The entire disclosures of each of the above applications are incorporated herein by reference.INTRODUCTION[0002]This invention relates to an adhesive containing a corrosion protective additive and a wrap material for wrapping products which uses the adhesive. The adhesive may include, for example, a vapor corrosion inhibitor (VCI) that reacts with moisture enclosed within the wrapping material to protect the products from corrosion.[0003]Corrosion is a natural occurring process that causes metals to react with their environment to form more stable compounds. The cost of corrosion on metals has been estimated as about 4.9% of...

Claims

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Application Information

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IPC IPC(8): C08K5/3475C08K5/09C08K5/19C08K3/28B32B27/12C09J7/21C09J7/38
CPCB32B27/12C08K5/057C09J7/045C09J153/00C09J2400/263C09J2453/00C09J7/0221Y10T428/28B01F7/00883B01F2215/006C08K13/02C09J11/04C09J11/06C08L2666/02B32B5/022B32B5/024B32B5/22B32B5/26B32B7/12B32B25/08B32B25/10B32B25/14B32B27/08B32B27/18B32B27/20B32B27/302B32B27/306B32B27/32B32B2262/02B32B2262/0261B32B2262/0276B32B2262/06B32B2262/067B32B2262/08B32B2264/00B32B2264/02B32B2264/104B32B2264/12B32B2307/54B32B2307/5825B32B2307/702B32B2307/704B32B2307/714B32B2307/7145B32B2307/724B32B2307/7246B32B2307/736B32B2405/00B32B2605/00C08K5/0025B29B7/46B29B7/60B29B7/603B29B7/72B29B7/88C09J7/38C09J7/387C09J7/21Y10T442/2738C09J2301/408B01F27/42B01F2101/36C09J153/005
Inventor TODT, GREGORY L.OZOL, SECKIN
Owner TRANSHIELD INC
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