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Adhesive composition, method for bonding to a metal surface and rubber to metal adhesive

A technology of adhesives and compositions, applied in surface pretreatment bonding methods, non-polymer adhesive additives, adhesive additives, etc., can solve the problem of not improving sprayability and viscosity stability, and poor spray performance , It is difficult to achieve dry film thickness control and uniformity

Active Publication Date: 2007-05-23
LORD CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Traditional inert fillers do not improve sprayability and viscosity stability issues in RTM adhesive dispersions and require dilution, however diluted adhesives can still exhibit poor spray performance and difficult to achieve control of dry film thickness control and uniformity

Method used

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  • Adhesive composition, method for bonding to a metal surface and rubber to metal adhesive
  • Adhesive composition, method for bonding to a metal surface and rubber to metal adhesive
  • Adhesive composition, method for bonding to a metal surface and rubber to metal adhesive

Examples

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Embodiment

[0065] The tests of the following examples are disclosed to further explain and fully disclose the present invention, and do not limit the scope defined by the claims of the present invention in any way.

[0066] Initial Adhesion (PA) - The bonded part is pulled to separate according to ASTM Test D429 - Method B. The test parts were peeled at a peel angle of 45 degrees. The test is performed at room temperature and a specified test speed is, for example, 2 or 20 inches per minute. After the bonded parts were separated, the peak peel strength (measured in pounds per machine direction inch) and the percent rubber remaining on the bonded coated area of ​​the part were determined.

[0067] 72 Hours Salt Spray (SS) - Sand the edges of the bonded parts with an abrasive wheel. The rubber is then bound to the metal back with stainless steel wire to compress the bonded area. This exposes the bondline to the environment. Scrape the adhesive layer with a razor blade to cause cracks. ...

Embodiment approach

[0126] The 45, 85 and 69 series below represent RTM adhesives that use water as a carrier and wetting aids and dispersants to disperse solids according to the invention. Bonded rubber-metal assemblies were prepared using standard procedures. Some coated samples were placed under prebake / precure heating conditions. After prebaking for the specified time, the adhesive layer portion of the adhesive-coated part was brought to the molding temperature for the specified time (in minutes) before the rubber was injected into the mold cavity. This simulates actual production conditions and helps determine if the adhesive remains sufficiently active to successfully bond rubber compounds.

[0127] Multiple initial adhesion, hot tear, boiling water and salt spray resistance tests were performed with or without prebaking of the adhesive.

[0128] Elastomers Tested: Sulfur vulcanized NR vulcanized at 320 mm for 16 min with a 40-45A durometer.

[0129] Measure hot tear after keeping at 300...

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Abstract

Disclosed is a rubber-metal adhesive in the form of dispersed solids in a volatile liquid carrier, with a specified pigment grind and is sprayable at uniform film coatings on metal surfaces at 25 +- 2 solids content wt.% and a viscosity of from 50 to about 500 cps (Brookfield LVT 2 @ 30 rpm). The adhesive comprises a dispersion of solid particles comprising nitroso compound, halogenated polyolefin, acid acceptor and from 5% to 35 wt.% of inert, incompressible, spheroidal particles having a BET surface area of from 0.1 to 10 m<2> / g and a 50 percentile particle diameter (D50) of 5 to 25 [mu]m.

Description

[0001] priority claim [0002] This application claims priority to US Provisional Patent Application No. 60 / 580,306, filed June 16, 2004, the contents of which are incorporated herein by reference. technical field [0003] The present invention relates to formulated adhesives for bonding rubber to metal which bond under heat and pressure during the vulcanization process. Background technique [0004] Adhesion of vulcanizable rubbers to rigid substrates, especially metals, can be achieved by a two-coat process using a primer and cover coat or by a single-coat primerless system. In order to provide durable bonds under pressure and environmental corrosion, the adhesive composition must exhibit a high degree of rubber retention on the substrate after bond breakage. In order to achieve such performance, in the use of adhesive, the dry film thickness must be continuously and carefully controlled...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J123/28C08K3/00C09J11/04
CPCC09J2400/166C09J11/04C08L23/28C09J2205/306C09J5/02C09J2400/163C09J2421/006C08K7/18C09J123/286C09J2423/00C08K5/32C09J11/06C09J2301/504
Inventor 克利斯汀·C·格林杰克·N·托尔马其
Owner LORD CORP
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