Toughened acrylics

The use of rubbers (low glass transition polymers) to toughen acrylic adhesives... 

Most conventional low-modulus adhesives and sealants, such as polysulfides, flexible epoxies, silicones, polyurethanes, and toughened acrylics, are flexible enough for use at intermediate low temperatures such as -40°C. Low-temperature properties of common structural adhesives used for applications down to -129°C are illustrated in Fig. 15.9, and the characteristics of these adhesives are summarized in Table 15.12. 

Mechanical Properties and Deformation Micromechanics of Rubber-Toughened Acrylic Polymers... 

Rubber-Toughened Acrylic Molding Materials. The materials were prepared by blending the toughening particles with Diakon LG156 (supplied by ICI Acrylics), which is poly[(methyl methacrylate)-co-(n-butyl acrylate)] (92... 

Figure 2. Variation of Youngs modulus (E) with (a) volume fraction of particles (Vp), and (b) volume fraction of rubber (VT),for rubber-toughened acrylic molding materials. Key , 2L , 4L , 3LA E, 3LAI ffl, 3LAII O, 3LB O, 3LC A, 3LD +, 3LE and , Diakon LG156.

The Youngs modulus and yield stress of rubber-toughened acrylic materials are effectively determined by the volume fraction of rubber and are insensitive to toughening-particle size and morphology. Tensile yielding in the ductile materials results from shear yielding in the matrix, which is stabilized and... 

An unusual type of two component system has recently been introduced in the adhesive industry (1,). These are called reactive adhesives, second generation acrylics, toughened acrylics, modified acrylics (2) or "honeymoon adhesives" (in Europe). 

Uses Inlermediale in organic synthesis monomer in mfg. of homopolymers and copolymers for solvent coatings, adhesives, paints, binders, emulsifiers, varnishes, inks, glues, adhesives, cleaning and waxing prods., nonwoven fabrics, textiles, paper, leather acrylic toughener acrylic resin comonomer modifier for oils/alkyds in food-contact coatings... 

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