Лако-красочные материалы — производство

In the United States, the American Society for Testing and Materials (ASTM) is the organization that has assumed the responsibility for the “development of standards on characterization and performance of materials, product systems and services, and the promotion of related knowledges.” The testing specifications of other organizations (such as the military in their ‘‘Mil-Specs’’) often […]

K. L. DeVries and P. R. Borgmeier University of Utah, Salt Lake City, Utah, U. S.A. I. INTRODUCTION The molecular mechanisms by which materials can adhere to one another have not been determined unambiguously. To date, no one has been able to predict reliably the strength of an adhesive joint based purely on the properties […]

It should be noted that side effects are possible when using adhesion promoters/coupling agents as additives in adhesives and coatings, usually beneficial but not invariably so. Beneficial effects from the use of titanates include deagglomeration, improved wetting, improved corrosion resistance, increased hydrophobicity, electrical conductivity in con­ducting systems, and acid resistance. The overall rheology of filled […]

DeNicola and Bell report the use of bibenzoylmethane and 1-(O-hydroxyphenyl)-3-phenyl- l,3-propanediol as wet adhesion promoters for epoxide resin adhesives on low-carbon mild steel [77]. Metal chelating O-hydroxybenzlamine compounds are stated to produce adhe­sion-promoting films on metals [78], and improved adhesion to titanium is claimed for metal alkoxide primers. Oxazolidines containing trialkoxy or triaryloxysilyl groups are […]

A wide variety of organic resins have been claimed to act as adhesion promoters on many different substrates Mahajan and Ghatge have reported that the use of a liquid epoxide resin (epoxide equivalent 260) materially improved the initial adhesion of polysulfide sealants to anodized aluminum alloy [71]. Abietate-terminated polysulfide polymers, epox­ide-terminated polysulfide polymers; and abietate-terminated […]

Hydroxybenzamines of the general formula have been claimed to improve the adhesion of a wide range of coatings to zinc and cadmium and other metallic substrates when used as either pretreatment primers or additives [63]. Ethylenically unsaturated hydroxy — functional amines have been claimed to improve the adhesion of water-based systems [64], and amines have […]

In addition to the organometallic adhesion promoters, a large number of inorganic, orga- nometallic, and organic compounds have been investigated, usually in specific adhesives and coatings or on selected substrates. A comprehensive account of coupling agents in use prior to 1969 is provided by Cassidy and Yager [48]. Although much of the reported information on […]

Adhesion promoters containing chromium fall into two main classes: inorganic and organic complexes. Examples of the former are the chromate conversion coatings used extensively in the aerospace industries for pretreatment of aluminum and its alloys. Although acting as anticorrosion coatings in their own right, they improve paint adhesion substantially [56]. Chromium conversion coatings that may […]

A comprehensive patented range of titanates is marketed by Kenrich Petrochemicals, Inc. under the trade name Ken-React, and most of the published data on titanates emanates from this source. It is claimed that a typical titanate coupling agent provides six functions [17], although only three may be considered relevant to their use as adhe­sion promoters: […]

Organometallic compounds based on zirconium are actively being promoted as adhesion promoters and are claimed to function as coupling agents. Zirconium compounds appear to have widespread potential for use in the polymer industries since they exist in both water and organic solvent-soluble forms. The aqueous chemistry is dominated by hydro­lysis, depending on zirconium and hydrogen […]