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15.02USA - Acrylic Vinyl Acetate Copolymers - U.S. Adhesives

This raw material report on acrylic vinyl acetate copolymers within the U.S. Adhesives Industry, commonly referred to as vinyl acrylic (VAC) copolymers include all copolymers of vinyl acetate with acrylic and methacrylic acids and their esters. This raw material category also includes the curable copolymer emulsions based on polyvinyl acetate and co-monomers capable of crosslinking either during the polymerization reaction or during a post-deposition heating stop. N-methylol acrylamide and hydroxymethylated diacetone acrylamide are typical reactive monomers that are used at a level of 10% or less of the total batch weight.

Acrylic vinyl acetate, on the other hand, is manufactured by the copolymerization of an alkyl acrylate, such as ethyl, 2-ethylhexyl and butyl acetate, with a vinyl acetate monomer. The products are predominantly sold in emulsion or latex form, although some solution polymers are available. The latter are used in formulating pressure sensitive adhesives. The currently available commercial vinyl acetate emulsions cover a wide spectrum of compositions which, like the PVA homopolymer emulsion, vary in adhesive characteristics, depending upon type and amount of protective colloid. These products are sold under trade names such as Plyamul, Gelva, Duroset and Flexbond. Acrylate concentration in the composition is usually in the range of 15-25% and 2-ethylhexyl acrylate along with butyl acrylate commonly the preferred co-monomers. Compositions for specific end uses are dictated by such properties as flexibility, tack, creep resistance, range of use temperature, and specific adhesion, which is most often the primary factor in choosing a vinyl acetate copolymer adhesive. These copolymer compositions exhibit excellent adhesion to low energy, non-polar surfaces to which PVA compositions adhere with difficulty. They also heat seal at lower temperatures, which dictates their use with temperature sensitive substrates.

VACs provide good low temperature film formation, binding capacity and durability. Although not as good as their acrylic counterparts, they are a good low cost alternative for select applications.

Many of the applications in which vinyl acetate copolymers find use were previously applications for PVA homopolymer, in which one of the above properties could be upgraded at a modest increase in cost.

The lamination of PVC film to cloth and wood uses both vinyl acetate copolymer emulsions and vinyl acetate ethylene emulsions. The ultimate choice is dependent upon the specific product performance requirements.

The use of vinyl acetate copolymer emulsions in bonding plastics to porous cellulosic substrates has grown at the expense of PVA homopolymer, but this use also is feeling the impact of vinyl acetate ethylene products.

Vinyl acetate copolymer emulsions with high acrylate content (above 50%) are growing in use as pressure sensitive adhesives for packaging and tape applications, particularly where air pollution pressures are a consideration. These products are based on 2-ethylhexyl acrylate as the co-monomer and offer low glass transition temperature.

Another class of high acrylate VACs utilizing butyl and methyl acrylate esters are beginning to merge as laminating adhesives with an aim to replace VAEs in such applications. Cost is the primary driver, capitalizing on lower cost atmospheric reactions during manufacture versus the high pressure VAEs in combination with lower cost acrylate esters. This resin classification report on acrylic vinyl acetate copolymers estimates 2003 demand with a historical perspective back to 2000 as well as forecasts through 2005 and 2010 within the U.S. Adhesives - Raw Materials Industry.
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Report Table of Contents

Acrylic Vinyl Acetate Copolymers Report - U.S. Adhesives Industry - RAW MATERIAL Market

Market Information - Forecasting Size and Growth Trends
Market Sector Information Forecasting Size and Growth Trends
Market Segment Information Forecasting Size and Growth Trends
Formulative Technology Information Forecasting Size and Growth Trends
Raw Material Suppliers
Growth Opportunities Size and Growth Trend
Commentary