Vinyl acetate

About: Vinyl acetate is a research topic. Over the lifetime, 15970 publications have been published within this topic receiving 162142 citations. The topic is also known as: Ethenyl acetate & Ethenyl ethanoate.

Copolymers for pressure-sensitive adhesives based on acrylic esters, (meth)acrylamide vinyl acetate and ethylene

Abstract: A copolymer having good properties for use as a pressure-sensitive adhesive from an aqueous dispersion comprising: (a) from 10% to 30% by weight of ethylene units, (b) from 29% to 69% by weight of acrylic ester units, (c) from 20% to 55% by weight of vinyl acetate units, (d) from 0.2% to 8% by weight of (meth)acrylamide units, and (e) from 0 to 12% of other olefinically-unsaturated monomer units copolymerizable with the above, said copolymer having a glass transition temperature of from -20° C. to -60° C. and a K-value according to Fikentscher, measured in tetrahydrofuran, of from 50 to 180; as well as processes to make the same and aqueous dispersions of the same for use as pressure-sensitive adhesives.

Latex fusion bonded pile carpets and carpet tile

Abstract: A fusion bonded carpet (199) with a latex formulation pile yarn backing adhesive (36) which includes vinyl acetate-ethylene, ethylene-vinylacetate, styrenebutadiene, latex polyvinyl chloride, polyvinylidene chloride, vinyl acetate acrylic acid or ester, styrene acrylic acid or ester, acrylic or methacrylic acid and their esters, or copolymers of these compounds.

RAFT chemistry and huisgen 1,3-dipolar cycloaddition: A route to block copolymers of vinyl acetate and 6-O-methacryloyl mannose?

Abstract: The present communication explores a novel avenue to glycopolymer-block- poly(vinyl acetate) polymers by a combination of reversible addition fragmentation chain transfer (RAFT) chemistry and Huisgen 1,3-dipolar cycloaddition (i.e., so-called ?click' chemistry) under mild reaction conditions. Such block copolymers are?because of the strongly disparate reactivity of the two monomers?otherwise not obtainable. Poly(vinyl acetate) that has an azide end group (Mn 6800 g mol?1, PDI 1.15) was treated with poly(6-O-methacryloyl mannose) (Mn 7600 g mol ?1, PDI 1.11) in the presence of 1,8-diaza[5,4,0]bicycloundec-7-ene and copper(i) iodide. The resulting poly(vinyl acetate)-block-poly(6-O- methacryloyl mannose) had a number-average molecular weight of 15 400 g mol ?1 and a PDI of 1.48, which indicates that while the cycloaddition had occurred the resulting polymer distribution featured a considerable width. The resulting slightly amphiphilic block copolymer was subsequently investigated with regard to its self-assembly in aqueous solution. Dynamic light scattering studies indicated a hydrodynamic diameter of close to 200 nm. Transmission electron microscopy studies indicate the formation of rods as well as spheres with transitions between these two phases. However, the segregation between core and shell in the spheres is not pronounced; such behaviour is expected for weakly amphiphilic block copolymers. © CSIRO 2007.

Emulsion polymerization of vinyl acetate using a polymerizable surfactant. I. Kinetic studies

Abstract: A polymerizable surfactant, sodium dodecyl ally sulfosuccinate (TREM LF-40; Henkel) and its nonpolymerizable counterpart were used in comparative studies of the emulsion polymerization on vinyl acetate. The conversion-time behavior differed for the two-surfactants; the TREM LF-40 showed a decrease in the polymerization rate with increasing concentration while its hydrogenated derivative showed the opposite behavior, the rate increasing with increasing surfactant. Particle size decreased with increassing surfactant concentration for both series of reactions. An explanation for the seemingly ambiguous results obtained for the polymerizable surfactant was sought