FIELD: chemistry.
SUBSTANCE: group of inventions relates to a polymer composition containing an impact strength modifier, a technological additive, and a mineral filler, to its production method, and to its use. The polymer composition P1 in a powder form, as an additive for thermoplastic halogen-containing polymer, contains: a) from 30 to 60 wt.% of an inorganic mineral compound (F), wherein the inorganic mineral compound (F) is a mineral filler (F1) selected from calcium carbonate, b) from 2 to 15 wt.% of (meth)acrylic copolymer (A1) or a mixture of (meth)acrylic copolymers, which is (are) (meth)acrylic copolymer containing at least 50 wt.% of polymer links originating from methyl methacrylate, and (meth)acrylic monomers selected from C1-C12 alkyl(meth)acrylates, wherein the specified (meth)acrylic copolymer (A1) or two (meth)acrylic copolymers (A1a) and (A1b) has(have) a weighted average molecular weight of at least 1,000,000 g/mol, c) from 25 to 68% of a polymer impact strength modifier (IM1) or a mixture of polymer impact strength modifiers, which is (are) polymer particles having a multilayer structure, and having a weighted average particle size between 20 nm and 500 nm, wherein particles of the polymer impact strength modifier (IM1) having a multilayer structure contain at least one layer (IM1L1) containing polymer (L1) having a glass transition temperature below 0°C, and at least another layer (IM1L2) containing polymer (L2) having a glass transition temperature above 45°C, while polymer (L1) is cross-linked, and polymer (L2) of the layer (IM1L2) is grafted on a layer located below. At the same time, three components from a), b), and c) are 100 wt.%, and each powder particle contains compounds a), b), and c), while the mass ratio of layer (IM1L1)/layer (IM1L2) in polymer particles having a multilayer structure is at least 85/15. A method for the preparation of a polymer composition P1 in a powder form, a method for the preparation of a polymer composition P2 containing a polymer composition P1 in a powder form, the use of a composition in a powder form as an additive for thermoplastic halogen-containing polymer for increase in the resistance to rupture of an extrusion flow or as an additive for thermoplastic halogen-containing polymer P2 subjected to transformation or recycling, as well as products containing a recycled polymer composition are also described.
EFFECT: provision of a polymer composition acting as an impact strength modifier and a technological additive at the same time, which also makes it possible to increase the resistance to rupture of an extrusion flow and increase the performance of extrusion of thermoplastic polymers.
22 cl, 4 tbl, 5 ex
