Accession Number : AD0694004

Title :   THE FUNCTION OF ADHESION PROMOTERS IN ADHESIVE BONDING.

Descriptive Note : Interim rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Bascom,Willard D.

Report Date : 05 JUN 1969

Pagination or Media Count : 18

Abstract : The wet strength of adhesive bonds between resins and glass or metal can be substantially improved by applying adhesion promoters to the glass or metal surface. The most widely used of these adhesion promoters are the organofunctional trialkoxysilanes (RSi(OR')3. Some of the more pertinent research results concerning these silanes have been reviewed in the hope of establishing how they function as finishing agents. Work indicates that these compounds form polysiloxane coatings on the adherend surface. These coatings consist of a strongly adsorbed polysiloxane network along with a more weakly held material consisting of small polymer molecules and unreacted silane. The polysiloxane network exposes a high density of the organofunctional group R- at the air/silane-coating interface. However, the R- groups are not closely spaced, and, in fact, there is some evidence that the coatings can be penetrated by the adhesive resin. Some new approaches are offered for research into the highly complex but exceedingly important area of adhesion promoters. (Author)

Descriptors :   (*ADHESION, *SILANES), (*GLASS, *BONDING), (*EPOXY RESINS, BONDING), (*METALS, BONDING), POLYESTER PLASTICS, FILMS, SURFACE PROPERTIES, COMPOSITE MATERIALS, HYDROLYSIS, SILOXANES, CHLORINE COMPOUNDS, FLUORINE COMPOUNDS, HALOGENATED HYDROCARBONS, SURFACE ACTIVE SUBSTANCES, ADHESIVES

Subject Categories : Physical Chemistry
      Adhesives, Seals and Binders

Distribution Statement : APPROVED FOR PUBLIC RELEASE