摘要:
A method for the crystallization of macromolecules in a three-phase system using a vessel containing a lower aqueous phase, a middle phase and an upper hydrophobic phase having a lower density than that of the lower aqueous phase, wherein an aqueous solution of the macromolecules is added to the middle phase to form a fourth phase, followed by incubation.
摘要:
This invention relates to a process for stabilising and at the same time phase compatibilising plastics or plastic compositions by incorporating polymeric compounds obtainable by reacting a compound selected from the group consisting of the sterically hindered phenols, sterically hindered amines, lactones, sulfides, phosphites, benzotriazoles, benzophenones and 2-(2-hydroxyphenyl)-1,3,5-triazines, which compounds contain at least one reactive group, with a compatibilisator.
摘要:
This invention relates to a process for stabilising and at the same time phase compatibilising plastics or plastic compositions by incorporating polymeric compounds obtainable by reacting a compound selected from the group consisting of the sterically hindered phenols, sterically hindered amines, lactones, sulfides, phosphites, benzotriazoles, benzophenones and 2-(2-hydroxyphenyl)-1,3,5-triazines, which compounds contain at least one reactive group, with a compatibilisator.
摘要:
The invention describes novel mixtures comprising i) a processing stabilizer selected from the group consisting of hydroxylamine stabilizers, nitrone stabilizers, benzofuran-2-one stabilizers and/or a compound of the formula I wherein R2 is C7-C30alkyl, R3 is C1-C30alkyl, and ii) an antistatic agent selected from the group consisting of an ethoxylated amine and/or an ethoxylated amide, as stabilizers for protecting organic materials, in particular synthetic polymers, against oxidative, thermal or lightinduced degradation.
摘要:
A method for the crystallization of macromolecules in a three-phase system using a vessel containing a lower aqueous phase, a middle phase and an upper hydrophobic phase having a lower density than that of the lower aqueous phase, wherein an aqueous solution of the macromolecules is added to the middle phase to form a fourth phase, followed by incubation.
摘要:
A composition containing (1) a crystalline polypropylene resin and (2) one or more β-nucleating agents of the formula (I), wherein R1, R2 and R3, independently of one another, are C1-C20alkyl, C2-Calkyl substituted by C1-C10alkylamino, di(C1-C10alkyl)amino, C1-C10alkyloxy or hydroxy; C3-C20alkenyl, C5-C12cycloalkyl, C5-C12Cycloalkyl substituted by 1, 2 or 3 C1-C10alkyl; cyclohexylmethyl; cyclohexylmethyl substituted by 1, 2 or 3 C1-C10 alkyl; C5-C9cycloalkenyl, C5-C9cycloalkenyl substituted by 1, 2 or 3 C1-C10alkyl; phenyl substituted by 1, 2 or 3 radicals selected from the group consisting of C1-C10-alkyl, C1-C10alkyloxy, hydroxy, halogen, trihalogenmethyl, trihalogenmethoxy, benzoyl, phenylamino, acylamino and phenylazo; C7-C9phenylalkyl, C7-C9phenylalkyl which is substituted on the phenyl by 1, 2 or 3 radicals selected from the group consisting of C1-C10alkyl, C1-C10alkoxy and hydroxy; naphthyl, naphthyl substituted by C1C10alkyl, adamantyl, or a 5 to 6 membered heterocyclic group; characterized in that the polypropylene resin has a content of β-form crystals of at least 10% calculated by means of the following equation β-form crystal content (%)=100×P⊕1,/(Pa1+Pa2+Pa3+Pβ1) where Pa1 to Pa3 are respective peak heights (maxima) of the a-form and Pβ1 is a peak height (maximum) of the β-form determined by wide angle X-ray scattering.
摘要:
By heating at above the melting point and/or glass transition point of the polycondensate and adding an aromatic dicyanate; or adding a mixture comprising an aromatic dicyanate and a polyfunctional compound selected from the class of sterically hindered hydroxyphenyl-alkyl-phosphonic esters and monoesters, diphosphonites and secondary aromatic amines; or adding a mixture comprising (i) an aromatic dicyanate, (ii) at least one polyfunctional compound selected from the class of sterically hindered hydroxyphenyl-alkyl-phosphonic esters and monoesters, diphosphonites and secondary amines, and (iii) a difunctional epoxide, it is possible to bring about an increase in the molecular weight and/or viscosity of virgin polycondensate and polycondensate recyclates.
摘要:
Recycled mixtures of plastics, predominantly thermoplastics, as predominantly produced in the household, in commerce and also in industry and useful material collections, can be stabilized against thermooxidative degradation by adding a combination of a sterically hindered phenol with an organic phosphite or phosphonite and an inorganic compound from the series consisting of metal oxides, hydroxides and carbonates.
摘要:
A circuit for generating a reference voltage for the reading out from and the evaluation of read output signals which are read out with a constant plate voltage from storage cells of a ferroelectric memory via bit lines. In the circuit, a reference voltage device is formed of two reference cells that are subjected to the action of complementary signals. The reference cells can be simultaneously read out in order to generate the reference voltage in a selection and evaluation device.
摘要:
Recycled plastics, predominanty thermoplastics, from domestic, commercial and industrial waste can be stabilized against thermooxidative degradation by adding a combination of a sterically hindered phenol with an organic phosphite or phosphonite and a metal salt of a fatty acid.