摘要:
Compositions comprising an organic polymer as the matrix and inorganic particles as the filler and exhibiting in mixture a) 20 to 99.9% by wt. of an organic polymer and b) 0.1 to 80% by wt. of inorganic particles, where the sum of the constituents a) and b) amounts to 100% by wt.; and optionally c) 0 to 100 parts by weight of b) of various additives, in which case the content of the additives c) relates to the sum of a) and b), calculated as 100 parts by weight. characterized in that the composition can be obtained by incorporating particles and optionally other additives into the polymer matrix, in which case the particles to be incorporated i) are aggregates of globular primary particles; ii) the size of the primary particles is in a range of 0.5 nm to less than 100 nm; iii) the volume-weighted median value d50 of the particles is in a range of greater than 0.50 μm to 0.5 μm, determined by means of static light scattering; and iv) the inorganic particles are modified with functional groups, the inorganic particles exhibiting at least three types of functional groups of varying reactivity. The compositions can be prepared in a number of way, for example, by reprecipitation from the dissolved state or by mixing in an extruder and are used for preparing fibers, films and shaped articles with improved mechanical properties.
摘要:
Compositions comprising an organic polymer as the matrix and inorganic particles as the filler and exhibiting in mixture a) 20 to 99.9% by wt. of an organic polymer and b) 0.1 to 80% by wt. of inorganic particles, where the sum of the constituents a) and b) amounts to 100% by wt.; and optionally c) 0 to 100 parts by weight of b) of various additives, in which case the content of the additives c) relates to the sum of a) and b), calculated as 100 parts by weight. characterized in that the composition can be obtained by incorporating particles and optionally other additives into the polymer matrix, in which case the particles to be incorporated i) are aggregates of globular primary particles; ii) the size of the primary particles is in a range of 0.5 nm to less than 100 nm; iii) the volume-weighted median value d50 of the particles is in a range of greater than 0.50 μm to 0.5 μm, determined by means of static light scattering; and iv) the inorganic particles are modified with functional groups, the inorganic particles exhibiting at least three types of functional groups of varying reactivity. The compositions can be prepared in a number of way, for example, by reprecipitation from the dissolved state or by mixing in an extruder and are used for preparing fibers, films and shaped articles with improved mechanical properties.
摘要:
The invention relates to a polymer mixture, based on the (meth)acrylate (co)polymer components a.), b.), c.) and/or d.) according to claim 1, where a test specimen produced from the polymer mixture simultaneously has the following properties: a tensile modulus (ISO 527) of at least 2 500 MPa, a Vicat softening point VSP (ISO 306-350) of at least 110° C., an impact resistance (ISO 179-2D, flatwise) of at least 30 kJ/m2, and a melt index MVR (ISO 1133, 230° C./3.8 kg) of at least 1.0 cm3/10 at least The invention further relates to injection mouldings and to the use of the polymer mixture for production of injection mouldings.
摘要:
The present invention describes a process for the surface finishing of materials via application of specific polymethacrylate layers. The polymethacrylate layers are composed of blends of at least two (co)polymers of polymethacrylates, and specific “reactive monomers” are present here in a polymerized mixture which forms the polymethacrylate layer. At the application temperature established, these form a chemical and, where appropriate, also a physical bond to the substrate, and therefore have adhesion-promoting action.
摘要:
The invention relates to a multilayer film encompassing at least one upper layer a) and one middle layer b) composed of (meth)acrylate copolymers, and also a backing layer c) composed of polycarbonate, where the upper layer a) comprises a light stabilizer and is composed of a (meth)acrylate copolymer which can form semicompatible mixtures with the polycarbonate of the backing layer c), where a test specimen produced from a mixture composed of 20% by weight of (meth)acrylate copolymer and 80% by weight of polycarbonate has a tensile strain at break of at least 75% (ISO 527-2) at 23° C., the middle layer b) comprises a dye and, where appropriate, a light stabilizer, and is composed of an identical or different (meth)acrylate copolymer which can form semicompatible mixtures with the polycarbonate of the backing layer c), where a test specimen produced from a mixture composed of 20% by weight of (meth)acrylate copolymer and 80% by weight of polycarbonate has a tensile strain at break of at least 75% (ISO 527-2) at 23° C., and the backing layer c) is composed of polycarbonate which can, where appropriate, comprise up to 30% by weight of the material of the layers a) and b). The invention also relates to the production and uses of the multilayer film, and also to semicompatible polymer mixtures composed of (meth)acrylate copolymers and polycarbonate.
摘要翻译:本发明涉及包含由(甲基)丙烯酸酯共聚物组成的至少一个上层a)和一个中间层b)以及由聚碳酸酯构成的背衬层c)的多层膜,其中上层a)包含光稳定剂 并且由与背衬层c)的聚碳酸酯形成半不溶性混合物的(甲基)丙烯酸酯共聚物组成,其中由20重量%的(甲基)丙烯酸酯共聚物和80重量%的混合物制成的试样 的聚碳酸酯在23℃下的拉伸断裂应变为至少75%(ISO 527-2),中间层b)包含染料,并且在适当的情况下包含光稳定剂,并且由相同或不同的 (甲基)丙烯酸酯共聚物,其可以与背衬层c)的聚碳酸酯形成半相容的混合物,其中由由20重量%的(甲基)丙烯酸酯共聚物和80重量%的聚碳酸酯组成的混合物制备的试样具有拉伸 a 在23℃下至少75%(ISO 527-2),背衬层c)由聚碳酸酯组成,其可以适当地包含至多30重量%的层a)和b)的材料, 。 本发明还涉及多层膜的制备和使用,以及由(甲基)丙烯酸酯共聚物和聚碳酸酯组成的半不饱和聚合物混合物。
摘要:
A moulding compound comprises a copolymer (I)a), produced by polymerisation of 90-100% by weight methylmethacrylate, styrene and malic acid anhydride, and optionally 0-10% by weight additional monomers which can be copolymerised with methylmethacrylate, a (co)polymer (II)b), produced by polymerisation of 80-100% by weight methylmethacrylate and optionally 0-20% by weight additional monomers which can be copolymerised with methylmethacrylate, and has a solution viscosity in chloroform at 25° C. (ISO 1628 Part 6) of 50 to 55 ml/g, as well as c) optional conventional additives, auxiliary agents and/or fillers. The moulding compound is characterised in that the copolymer (I) has a solution viscosity in chloroform at 25° C. (ISO 1628 Part) of 55 ml/g or less. Also disclosed are mouldings produced by thermoplastic processing of the moulding compound and their uses.
摘要:
The invention relates to a polymer mixture, comprising a) a polymer matrix which is composed of a (meth)acrylate (co)polymer or of a mixture of (meth)acrylate (co)polymers with a Vicat softening point VSP (ISO 306-B50) of at least 104° C. and/or of a (meth)acrylimide (co)polymer, b) an impact modifier which is based on crosslinked poly(meth)acrylates and which does not have covalent bonding to the polymer matrix a), c) from 1 to 15% by weight of plastics particles composed of crosslinked polymers based on polymethyl methacrylate, on polystyrene and/or on polysilicones. The polymer mixture can be used to obtain injection mouldings with matt surfaces and Vicat softening points VSPs (ISO 306-B50) of at least 90° C.
摘要:
The invention relates to a multilayered film comprising at least one upper layer a), a middle layer b) made of (meth)acrylate copolymer, and a supporting layer c) made of polycarbonate. Upper layer a) contains a light-stability agent and is made of a (meth)acrylate copolymer that, together with the polycarbonate of supporting layer c), can form partially compatible mixtures. A test piece, which is made from a mixture consisting of 20% by weight of (meth)acrylate copolymer and 80% by weight of polycarbonate, has a breaking elongation (ISO 527-2) of at least 75% at 23° C. The middle layer b) contains a colorant and, optionally, a light-stability agent and is made from an identical or different (meth)acrylate copolymer that, together with the polycarbonate of supporting layer c), can form partially compatible mixtures. A test piece, which is made from a mixture consisting of 20% by weight of (meth)acrylate copolymer and 80% by weight of polycarbonate, has a breaking elongation (ISO 527-2) of at least 75% at 23° C., and the supporting layer c) is made of polycarbonate that, optionally up to 30% by weight of the material of the layers, can contain a) and b). The invention also relates to the production and uses of the multilayered film and to partially compatible polymer mixtures consisting of (meth)acrylate copolymer and polycarbonate.
摘要:
The invention relates to a shaping tool for the injection molding or injection compression of information carrier disc blanks (11) made of polymethacrylate plastic which is suited as a component of an injection molding or injection compression machine. The shaping tool is comprised of two mold parts (1, 2), whereby one mold part (1) contains a bottom part (8) of a mold with the information data and, together with the second mold part (2), forms a cavity for the one information carrier blank and one sprue bush (4) for a sprue piece (5) in the tool having a concentrically positioned feed orifice (6). In addition, the tool comprises a impact cylinder (9) for shearing the sprue piece (5) and has an ejector pin (10). The invention is characterized in that the injection gap (SP) between the feed orifice (6) of the sprue piece (5) and the information carrier disc blank (11) is less than 0.3 mm. In addition, the cutting gap (SN) between the edge of the impact cylinder (9) and the information carrier disc blank (11) is less than 0.2 mm.
摘要:
The invention concerns the use of a copolymer comprising (a) between 60 and 98 wt % methylmethacrylate, and (b) between 2 and 40 wt % styrene, and optionally (c) between 0 and 20 wt % maleic acid anhydride, as modifying agents for increasing the melt viscosity for partially crystalline, partially aromatic polyesters, with the exception of polybutylene terephthalate containing intensifier fillers.