Acronal V ap is processed with fillers in usual mixers. Vacuum planetary mixers have proven suitable for producing sealants. In order to gain optimal filler . Acrylic/vinyl acetate copolymer emulsion. Used in adhesives for laying PVC floor coverings and carpets with many different backings. Offers benefits such as hig. Description. An acrylic/vinyl acetate copolymer emulsion; used as a base for industrial adhesive formulations used as base for packaging and laminating.
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Suspendisse quis orci lectus. A high solids polymer dispersion according to claim acroonal, wherein said latex comprises up to 50 wt. Examples ofthe limited highly water soluble monomers include olefinic monoacids having3 to 10 carbon atoms, acrylic acid, olefinic diacids having 4 to 12 carbon atoms, and acrylonitriles having 3 to 10 carbon atoms.
Acronal® – flooring :: BASF Sustainable Construction North America
The monomer composition polymerized in the presence of the latex need not be similar to the composition of the monomers used to make the latex and may be chosen to modify the properties of dried films from the dispersion. The dispersion of polymer particles, fungicide and glycols was added acrobal the mixer and mixed until uniform, usually from minutes.
Dispersions of polymer particles in water have been used extensively in water-based sealants such as coatings and caulking. The resultant polymer was very thixotropic. Upon removal of shear, the polymer particle dispersions thicken but are capable of being shear thinned.
The resulting dispersions show bimodal or multimodal particle size distributions with acrnoal diameters ranging from around 0. Adhesive copolymer microspheres-containing aqueous suspension and method for producing the same.
A method for polymerizing at least one unsaturated monomer in the presence of a latex results in a high solids dispersion of polymer particles with lower viscosities than traditionally observed. For a 75 wt. These polymers are desirably substantially non-crystalline meaning they have less than 10, 5, or 2 wt. The agglomeration of small particles into larger particles seems to occur in acontrolled manner acronxl the formation of coagulum which would be expected in typical polymer dispersions in water when agglomeration occurs.
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Flexible Packaging Applications We innovate to make your adhesives stick. This micrographs show the range in particle size distribution and morphology that can be achieved in the pH and solids range shown by samples A-K in the following Table V. As specified above it is very desirable that the monomers, which form high Tg homopolymers, copolymerize with other monomers thereby not forming significant amounts of high Tg homopolymers.
The preferred media for the latex is water or blends thereof which blends are substantially i. Examples 1, 2, 3 and 4 show how acrylate polymer dispersions were prepared at 72, 79, 80, and 87 percent solids.
Process for preparing emulsions by polymerization of aqueous monomer-polymer dispersions. These correlate well with measurements by diffusion and sedimentation, column chromatography, and acrronal in an electron microscope. In the final dispersion of polymer particles, these particles from the latex willbe present probably in fewer number as one or more modes in the particle size distribution.
Alternatively the caulking formulation may achieve equivalent solids content with less fillers. The remainder of the monomer mixture was then added dropwise over a 60 minute period.
Mixing Rate of Acronal V275 with Acronal V206?
Desirably at acrohal 70, 80 or 90 wt. General Procedure B was used for polymerization. The dispersion of polymer particles desirably has two or more groups of dispersed polymer particles resulting in a broad particle size distribution. A mode is defined as the predominant diameter present in a peak of the 27 size distribution. The partially neutralized latex was then added to a reactor and stirred under nitrogen at rpm. This monomer stream was added to the reactor over 3 hours.
Santicizer is acrona butyl benzylphthalate plasticizer for various polymers available from Monsanto Co. In embodiments using these monomers desirably at least 5, 10 or 15 wt. However, UL assumes no responsibility or liability for the accuracy of the information contained on this website and strongly encourages that upon final product or material selection information is validated with the manufacturer. More desirably the viscosity is less than 20, cps.
Then t-butyl hydroperoxide was added and the mixturewas cooled aronal 43 C. The polymerization of this disclosure could also be done in a continuous polymerization. This example used the same carboxylated acrylated acrylic latex and monomerblend as Example 1 but went to a higher solids content. Acronzl latex can be formed by emulsion polymerization of unsaturated monomers or by dispersing a preformed polymer such as a urethane polymer in an aqueous media.
Low Tg values are desirable for low temperature flexibility; however, they can betacky at higher temperatures. The starting latexes with from 40 to 68 weight percent solids may vary fromstandard emulsion polymerized latexes because they are often bimodal or multimodal. Seed polymerized latex polymer having a gradient polymeric morphology and process for preparing the same. Example 11 This example is similar to Example 10 above, instead using a non-carboxylated nitrile latex.
The polymer dispersion may have polymers having 2 or more acrpnal Tg values. Then t-butyl hydroperoxide 0.
In other embodiments the latex can be other than acrylate or a copolymer with acrylate s.