Abstract: An acrylic glass plate for use as an opaque noise protection element in noise protection walls, the plate measuring a minimum of 2×2 m and having a minimum thickness of 8 mm wherein threads, strips, grids or networks consisting of a material which is incompatible with the acrylic glass are integrated into the acrylic glass for binding splinters in the event of a fracture of the plate, and the plate comprises between 40 and 80 wt. % of filling materials, in relation to its total weight (calculated without integrated threads, strips, grids or networks); and a method for producing such plates.

Abstract: The invention concerns the recovery of monomeric esters of substituted or unsubstituted acrylic acid or of monomers containing styrene from polymer material (66) containing corresponding structural units. According to the invention, the polymer material is brought into contact with a heat transfer medium inside a heated reactor (51). The heat transfer medium and the polymer material (66) are agitated inside the reactor (51), and gas, which forms inside the reactor (51) and which contains the monomer, is drawn out of the reactor (51). The heat transfer medium contains a multitude of spherical particles (67), which has been proven to be particularly advantageous for achieving high yields and purity of the monomer to be recovered.

Abstract: The invention relates to an acrylic glass plate for using as an opaque noise protection element in noise protection walls, said plate measuring a minimum of 2×2 m and having a minimum thickness of 8 mm, preferably more than 12 mm. Threads, strips, grids or networks consisting of a material which is incompatible with the acrylic glass are integrated into said acrylic glass for binding splinters in the event of a fracture of the plate, and the plate comprises between 40 and 80 wt. % of filling materials, in relation to its total weight (calculated without integrated threads, strips, grids or networks). Said filling materials are preferably extender materials consisting of talc and dolomite, optionally and preferably mixed with aluminium hydroxide. The invention also relates to a method for producing such plates.

Abstract: A transparent plastic pane of acrylic glass with internal plastic filaments, which largely hold together the fragments formed in the event of a break characterized in that the plastic filaments are at least partly sized. The internal filaments can be sized completely and/or partly, for example in portions. Hereby the matrix adhesion of the filaments can be adjusted to the effect that any fragments which may be formed in the event of break are largely held together by the filaments without permitting undesired detachment of the filaments during thermal stresses in the normal range of −20 to 120° C. The plastic panes are suitable in particular as a noise protection wall.

Abstract: A transparent plastic pane of acrylic glass with internal plastic filaments, which largely hold together the fragments formed in the event of a break, characterized in that the plastic filaments are at least partly sized.