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1. WO2020091621 - A POLYPROPYLENE-BASED COMPOSITION WITH IMPROVED TRANSPARENCY, IMPACT VISCOSITY AND HARDNESS FOR INJECTION MOLDED THIN-WALLED ARTICLES, A METHOD FOR PREPARING SUCH COMPOSITION AND ARTICLES MADE THEREFROM

Publication Number WO/2020/091621
Publication Date 07.05.2020
International Application No. PCT/RU2018/000720
International Filing Date 02.11.2018
IPC
C08F 255/02 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
255Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/138
02on to polymers of olefins having two or three carbon atoms
C08F 255/08 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
255Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/138
08on to polymers of olefins having four or more carbon atoms
C08J 5/18 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H142
5Manufacture of articles or shaped materials containing macromolecular substances
18Manufacture of films or sheets
C08L 23/30 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
23Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
26modified by chemical after-treatment
30by oxidation
C08L 51/06 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
51Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
06grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
C08L 33/08 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
33Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Compositions of derivatives of such polymers
04Homopolymers or copolymers of esters
06of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
08Homopolymers or copolymers of acrylic acid esters
Applicants
  • PUBLIC JOINT STOCK COMPANY "SIBUR HOLDING" [RU]/[RU]
Inventors
  • VOLKOV, Alexey Mikhailovich
  • RYZHIKOVA, Irina Gennadievna
Agents
  • LAW FIRM "GORODISSKY & PARTNERS" LTD
Priority Data
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) A POLYPROPYLENE-BASED COMPOSITION WITH IMPROVED TRANSPARENCY, IMPACT VISCOSITY AND HARDNESS FOR INJECTION MOLDED THIN-WALLED ARTICLES, A METHOD FOR PREPARING SUCH COMPOSITION AND ARTICLES MADE THEREFROM
(FR) COMPOSITION À BASE DE POLYPROPYLÈNE PRÉSENTANT UNE TRANSPARENCE, UNE DURETÉ ET UNE VISCOSITÉ D'IMPACT AMÉLIORÉES POUR DES ARTICLES MOULÉS PAR INJECTION À PAROI MINCE, PROCÉDÉ DE PRÉPARATION D'UNE TELLE COMPOSITION ET ARTICLES FABRIQUÉS À PARTIR DE CELLE-CI
Abstract
(EN)
The present invention is related to a polypropylene-based composition for making injection molded articles, comprising, based on the total weight of the composition: (A) from 53.8 to 79.8 wt. % of crystalline isotactic polypropylene, (B) from 10 to 20 wt. % of elastomer based on copolymer of ethylene with -olefin comprising 4 to 10 carbon atoms, and (C) from 10 to 25 wt. % of one or several homopolymers of ethylene and/or random thermoplastic copolymers of ethylene with -olefins comprising 3 to 10 carbon atoms; and also (D) a modifying system comprising from 0.04 to 0.64 wt. % of organic peroxide (D1) and from 0.04 to 0.64 wt. % of co-agent (D2), that is a vinyl monomer with three or more acrylate functional groups, and (E) from 0.05 to 1.0 wt. % of nucleating agent and optional additives. The composition is made by a two-stage method comprising a stage of providing a modified concentrate composition by mixing and compounding the components in a melt using mixing equipment and extruder. The obtained polypropylene-based composition has an optimal balance of properties, in particular increased flowability, improved impact resistance and hardness, and also transparency. The invention is also related to use of the polypropylene-based composition for making injection molded articles and also to an article based on the obtained composition.
(FR)
La présente invention concerne une composition à base de polypropylène pour la fabrication d'articles moulés par injection, comprenant, par rapport au poids total de la composition : (A) 53,8 à 79,8 % en poids de polypropylène isotactique cristallin, (B) 10 à 20 % en poids d'élastomère à base d'un copolymère éthylène-oléfine comprenant de 4 à 10 atomes de carbone et (C) 10 à 25 % en poids d'un ou plusieurs homopolymères d'éthylène et/ou copolymères thermoplastiques aléatoires éthylène-oléfines comprenant de 3 à 10 atomes de carbone ; et également (D) un système de modification comprenant 0,04 à 0,64 % en poids de peroxyde organique (D1) et 0,04 à 0,64 % en poids d'un co-agent (D2), qui est un monomère vinylique comportant au moins trois groupes fonctionnels acrylate et (E) 0,05 à 1,0 % en poids d'un agent de nucléation et d'additifs facultatifs. La composition est fabriquée par un procédé en deux étapes comprenant une étape consistant à produire une composition concentrée modifiée par combinaison et mélange des composants pour obtenir une masse fondue à l'aide d'un équipement de mélange et d'une extrudeuse. La composition à base de polypropylène obtenue présente un équilibre optimal de ses propriétés, en particulier une fluidité accrue, une résistance aux chocs et une dureté améliorées, ainsi qu'une belle transparence. L'invention concerne également l'utilisation de la composition à base de polypropylène pour fabriquer des articles moulés par injection et, également, un article à base de la composition obtenue.
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