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Additives for improved adhesion to oily substrates

A technology of additives and adhesives, applied in the directions of polymer adhesive additives, non-polymer adhesive additives, adhesive additives, etc., can solve problems such as poor adhesion performance

Inactive Publication Date: 2010-09-22
LORD CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, however, most adhesion promoters have poor adhesion on oiled substrates unless the oil is removed to allow the adhesion promoter to contact the surface of the substrate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0039] Curable compositions comprising adhesion promoting additives of embodiments of the present invention have even been shown to improve penetration through waxy oils such as PL 61, metal forming lubricant from Zeller+Gmelin (Germany)) and possibly improved adhesion through wax lubricant Multidraw Drylube E1 (as also from Zeller+Gmelin). Drylube type lubricants have proven to be problematic for bonding through most adhesives.

[0040] Trials were conducted by adding various levels of hexadecane to commercially available epoxy / acrylate structural adhesives. The adhesive was applied in bead form (approximately 10 mm wide, 3 mm thick) at 3 g / m 2 way coated with Multidraw PL on hot-dip galvanized steel sheets.

[0041]

Composition A

Composition B

current technology

Element

weight%

weight%

weight%

Epoxy / Acrylic Structural Adhesives

98.0

95.0

100

Hexadecane

2.00

5.00

0.00

[0042] ...

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Abstract

An adhesive composition is provided which is capable of bonding to metallic surfaces which are contaminated with oil or oily residue. An adhesion improving additive is added to the base adhesive / coating composition which enables the adhesive to achieve better bonding to oily substrates. Addition of the adhesion improving additive improves the adhesion of adhesives, sealants, and coatings to the oily substrates used in the automotive and industrial markets. The an adhesion improving additive is an aliphatic molecule of at least 8 carbon atoms or having an aliphatic end group or side chain of least 6 carbon atoms, and wherein the adhesion improving additive comprises a boiling point of at least 30 DEG C.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Patent Application No. 60 / 983,947, filed October 31, 2007, entitled "ADDIVIVES FORIMPROVED ADHESION TO OILY SUBSTRATES," the disclosure of which is incorporated herein by reference. technical field [0003] The present invention relates to curable adhesives or coatings employing an adhesion promoting additive which allows the curable composition to bond to oily substrates without the need for mechanical wiping or surface preparation prior to bonding. Background technique [0004] Curable structural adhesive compositions are commonly used to bond metal parts. This bonding of metal parts is widely used in the automotive industry where adhesive bonding is replacing welding, providing better structural connectivity between parts and faster assembly times . However, parts typically remain at least partially coated with oil (either used in the part manufacturing process or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J11/08C08K5/00C08K5/01C09J133/04C09J163/00
CPCC09J11/06C08L33/02C09J5/00C09J133/02C09J2400/163C08L63/00C09J163/00C08K5/01C08L2666/02C08L2666/04C08L2666/22
Inventor 马克·W·普雷斯利柯克·J·阿比桑德拉·L·卡斯
Owner LORD CORP