Solvent Borne Acrylic Construction Sealants (Clear)

Adhesives Formulation

Applicable Type

Solvent borne Adhesives

Applicable Base Polymer

Acrylics & Acrylic Copolymers

Applicable Industrial Sectors

Buildings & constructions

Applicable Base Polymer Properties

Acrylic solvent solutions offer an adhesive with excellent overall performance properties. Acrylic resins are tremendously versatile due to the large number of different monomers and resins available. Acrylic adhesives can provide bonds ranging from flexible and tough to hard and rigid depending on the formulation. Acrylic adhesives inherently have very good UV and oxidative stability and are generally preferred for outdoor applications. Solvent-based acrylic adhesives provide somewhat better chemical and heat resistance than water borne acrylics.

Typical Formulation Ingredients

Ingredient

Parts by weight

Acrylic polymer, 68% non-volatiles in toluene (SM ARO, Schnee-Morehead, Inc.)

xxxxx

Acrylic polymer, 83% non-volatiles in xylene (SM 7603, Schnee-Morehead, Inc.)

Calcium carbonate (Drilalite, ECC International)

Thixotrope (Aerosil 200, Degussa Corp.)

xxxx

Rheology modifier (Thixatrol ST, Rheox, Inc.)

Toluene

xxxx

Glymo silane (Hulls America, Inc.)

xxxx

(Source: Amstock, J.S., Handbook of Adhesives and Sealants In Construction, McGraw-Hill, New York, 2000, pp. 3.20-3.21)

Typical Properties

Properties

Percent non-volatiles by weight, %

xxxxx

Density, lb/gal

xxxx

Slump, in

xxxx

Extrusion rate, sec/g, 60 psi, 0.104” orifice

Tack free time, mins

Maximum tensile strength, psi

Elongation at break, %

xxxxx

Recovery, %

Hardness, Shore A

Processing

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Resulting Properties

Acrylic solutions are used on a large scale for sealants and pressure sensitive adhesives. In order to have good peel strength to relatively non-smooth surfaces, a high viscosity product is required. In this formulation high viscosity is achieved by the addition of calcium carbonate and fumed silica.

Tips and Tricks

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