CJClF PRODUCT DEVELOPMENTS
:tfiV 11 ;] *M ΛI new multipurpose polymer and resin modifier
Adhesion promoter, plasticizer, tackif ier, latex heat sensitizer, wetting assistant... Also effective as a coupling agent, protective colloid, pigment binder, demulsifier, anticrocking agent, dye receptive agent, suspension stabilizer. The physical properties of Gantrez M (polyvinyl methyl e t h e r - PVM) are unique among com mercially available polymers. For example, it is soluble both in water and most organic solvents, including chlorinated and aromatic hydrocarbon types. And low-cost aliphatic hydrocarbons may be used as diluents for PVM solutions. Gantrez M is compatible with a wide range of polymers including acrylics, styrene-acrylate copolymers, epoxies, epoxy phenolics, polyvinyl butyral, chlorinated rubber, polyesters, alkyds, cellulosic polymers, vinyls, polyurethanes and aminoplasts. Unlike other water soluble polymers, Gantrez M is a soft, tacky, amorphous material that imparts flexibility to formulations to which it is added. Gantrez M functions as a permanent and nonmigratory plasticizer and tackifier for adhesives and coatings. A major use today is as an adhesion promoter. Since Gantrez M is soluble in water and com patible with organic solvent soluble polymers, it is able to help these polymers wet out the layer of adsorbed moisture which is believed to exist on all surfaces-including plastics and metals. And surprisingly, its use in adhesives, paints, printing inks and coatings will not usually detract from the water resistance properties of the system. Although Gantrez M is soluble in water, its Distribution or Partition Coefficient strongly favors organic ma terials. It actually resists leaching by water from organic soluble polymer systems. In some cases, the water resistance has actually been improved. Andthehygroscopicity of Gantrez M is l o w - a t 93% humidity the percent of moisture picked up at equilibrium is only 5%. Typical substrates to which Gantrez M will adhere include various metals, polyesters, cellulosics, nylons, vinyls, polystyrene acrylics and polyolefins. Major uses include acrylic copolymer pressure
CH3-CH-
(polyvinyl methyl ether)
sensitive adhesives (improves tack and adhesion), epoxy-based adhesives and coatings (improves metal adhesion), and chlorinated rubber, coatings (plasticizes and improves adhesion). Another interesting property of Gantrez M is its negative Solubility Coefficient. Water solutions have an inverse cloud point of about 90°F. This should prove Gantrez M useful as a thermogelling agent or heat sensitizer for latex compounds. This thermogelation property can be used to advantage in coatings to minimize penetration into ab sorbent surfaces, in the saturation of fibrous materials and in non-woven binder systems to minimize migration during drying. Gantrez M is currently available in the following grades: M-154
M-155
M-574
M-555
Mol. Wt.
low
medium
low
medium
higher
Solvent
water
water
toluene
toluene
toluene
% Solids
50
50
70
50
50
M-556*
All are stable, uniform and light in color. "Gantrez M-556 is a new, higher molecular weight polymer.
more fine products from GAF Corporation (Formerly General Aniline & Film Corporation) 140 West 51 Street, New York, N.Y. 10020 Commercial Development Dept. CEN1014 Please send me 26-page technical brochure D and sample of GANTREZ^ M-154D M-155D M-574 D M-555 D M-556D. Intended application:
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Name. Company. Address City
_State_
-Zip. 0SI68-6500
C&EN
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