Abstract:
The invention relates to combinatory methods for producing an array of n aqueous polymer dispersions by emulsion polymerization and for producing an array of m formulations of polymer dispersions, in addition to the arrays themselves. The methods are carried out at n or m spatially separated locations for the n or m formulations. To carry out the emulsion polymerization, monomers, an initiator, a dispersant and optionally additional components are reacted with one another in water, which acts as the reaction medium. To produce the formulations, aqueous polymer dispersions are mixed with other aqueous polymer dispersions and/or additional components. In all methods, each one of the n or m formulations differs from the other formulation in at least one respective parameter, which can influence the characteristics of the polymer dispersions or formulations that are obtained. The advantage of the invention is that said method allows a large number of aqueous polymer dispersions and formulations to be produced and characterized. This accelerates the development of aqueous polymer dispersions and formulations with optimized characteristics.
Abstract:
The invention relates to a pressure sensitive adhesive dispersion comprising a polymer P1, dispersed in water and formed by emulsion polymerization. The polymer P1 is formed from a monomer mixture containing (a) at least 40 wt % of C4 to C20 alkyl(meth)acrylate, which, when polymerized as homopolymers, have a glass transition temperature of -30° C or less, (b) at least 0.05 wt % of (meth)acrylate monomers having a substituent of the formula (I), wherein X stands for CH 2 , O, NH or NR and R stands for a C1 to C4 alkyl group, and (c) at least 0.1 wt % of acid monomers. The monomer mixture contains either at least 0.05 wt % of glycidyl(meth)acrylate and/or the pressure sensitive adhesive dispersion contains at least one other polymer P2 which has glycidyl groups.
Abstract:
The invention relates to the use of fine-particle polymer powders, containing at least one UV absorber for the stabilisation of polymers, in particular, polyolefins, against the effects of UV radiation. The invention further relates to stabiliser mixtures for the stabilisation of polymers against the effects of UV radiation, oxygen and heat, comprising, amongst others, said polymer powders and a method for the stabilisation of polymers, in particular, polyolefins against the effects of UV radiation, oxygen and heat, characterised in that effective amounts of said stabiliser mixtures are added to the polymers, in particular, the polyolefins. Furthermore, the invention relates to polymers stabilised against the effects of UV radiation, oxygen and heat, in particular, polyolefins, which comprise an effective amount of said polymer powders or stabiliser mixtures and objects produced from said stabilised polymers in particular, polyolefins.
Abstract:
The use of a composition of low or no tack at 20°C as an adhesive that can be adhered to itself (referred to below for short as an autoadhesive).