FIELD: chemistry.
SUBSTANCE: group of inventions relates to a nucleating agent in the form of particles, a polymer composition for products, a molded product and a method for its production. The nucleating agent in the form of particles for thermoplastic resin contains a compound represented by the general formula (1):
,
where in the general formula (1), R1-R4, each independently, is a tert-butyl group, R5 is a hydrogen atom or an alkyl group having from 1 to 4 carbon atoms, m is 1, M1 is Na. At the same time, when dry measuring the diameter distribution of particles of the nucleating agent in the form of particles, using the measurement of particle size distribution by laser diffraction, the maximum diameter of particles of the nucleating agent in the form of particles is Dmax, and the dispersion degree of particles of the nucleating agent in the form of particles, measured in accordance with the following procedure, is Dp. In this case, Dmax satisfies the expression (A), and Dp satisfies the expression (B): 87.2 mcm ≤ Dmax ≤ 198.2 mcm (expression (A)), 13% ≤ Dp ≤ 26.2% (expression (B)). The procedure for measuring Dp is carried out in accordance with the following: about 5 g of the nucleating agent in the form of particles is prepared as a sample, the sample is placed in a cylinder, and the cylinder is set so that the bottom height is 60 cm, and the sample is lowered from top to bottom into the cylinder, then the amount of sample remaining on the slide installed at the point of fall is measured, using the amount of incoming sample and the amount of sample remaining on the slide, the dispersion degree (%) is measured based on the following expression: dispersion degree (%) = [(incoming sample amount (g) - the amount of sample remaining on the slide (g)) / incoming sample amount (g)] × 100; or, in another embodiment of the invention, the nucleating agent in the form of particles for thermoplastic resin contains a compound also represented by the general formula (1), where the aspect ratio of particles of the nucleating agent in the form of particles is equal to or greater than 3.0 and equal to or less than 4.5, wherein, when dry measuring the diameter distribution of particles of the nucleating agent in the form of particles, using the measurement of particle size distribution by laser diffraction, the maximum diameter of particles of the nucleating agent in the form of particles is Dmax, and the average volume diameter of particles is MV, Dmax satisfies the expression (A), and MV satisfies the expression (C), in the specified intervals: 87.2 mcm ≤ Dmax ≤ 198.2 mcm (expression (A)), 9.2 mcm ≤ MV ≤ 34.5 mcm (expression (C)). A polymer composition for producing a molded product, a molded product obtained using a composition, and a method for producing a molded product by molding are also described.
EFFECT: improved performance characteristics of nucleating agent particles, such as manufacturability in various environments of use, such as transportation, mixing and storage, in particular, a decrease in the explosion index, but also in the production process of the product mixture, with the possibility of using nucleating agent particles to increase the transparency of crystalline polymer.
9 cl, 2 tbl, 4 ex
