SU994483A1 - Process for producing polymeric composition based on polyvinyl chloride - Google Patents

Description

(54) METHOD OF OBTAINING A POLYMER COMPOSITION BASED ON POLYVINYL CHLORIDE

This invention relates to a polyvinyl chloride (PVC) based polymer compression method used to produce rigid sheets and films used, for example, for packaging consumer goods, for extrusion and radduvom, etc. The specified materials must have good resistance to strength, heat resistance not lower than 60 to obtain products, it is sufficiently shaped for 10 hours and nb beating with during transport, and it is also easy to recycle j into a product. There is a well known method for producing a polymer composite based on polyvinyl chloride, including simultaneous polyvinyl chloride: a fiber with impact resistance — a copolymer of methyl methacrylate, butadiene in styrene, a lubricant and a stabilizer at 1 ° C, carbon temperature and temperature below. The impact strength of the mixture increases with increasing telcture (–8i 20®С - 15.3j 28 cm / cm), However, the melt index of such compositions is only O, 5-O, 8 G / 1 O min, which is insufficient and causes difficulty of processing .. also known is a process for preparing impact-resistant compositions based on polikyurnoy polivinilhlornda, ESC h iop1Ny mixing polyvinyl chloride with m mostabilizatorom during introduction tjav№ fikatora - copolymer metilmetakrila- one buta / styrene Schönau, heating and subsequent cooling to t However, the melt index this composition does not exceed 2.9 g / 1O min. The closest to the invention is a method for producing polymer composites based on polyvnlhporvda inclusions preliminarily mixing the plastificator with the metl-methacrylate copolymer modifier, styrene butaduve B, in a ratio of 0.5: 1 at 12O-14O С and then mixing the resulting mixture with polyvinyl chloride, with a non-shear volume, for example, using a mixture of polyvinyl chloride and a mixture of polyvinyl chloride and polyvinyl chloride; 80-9O C C A known composition has a high toughness, but its melt index is not higher than 2.1 g / 1O min. The purpose of the invention is to improve the processability of the composition (increase in the melt index) in preserving high tarnish. The goal is achieved by the fact that, according to the method for producing a polyvinylchlorond polymer-based composition, which includes pre-lubrication of a plasticizer with a modifier of methyl methacrylate, butadiene and styrene copolymer and the subsequent displacement of the resulting mixture with polyvinyl chloride and tarmostabilizator at 8O-90, the composition will be applied. at 18-25 with in the ratio (0, 2-2,0): 1. The composition contains 3-10 wt.h of plasticizer and 5-15 May h, modifier for: 1OO May. h PVC, Methyl methacrylate, butadiene modifier-copolymer and. styrene (MBS) contains 19–21 wt.% methyl methacrylate units, 41–50 wt.% butadiene, and 314% wt.% styrene units. As a plasticizer, the polymer composition contains, for example, dioctylfatate (DOP), a mixture of DOP with epoxy oil (ERM), a mixture of DOP with ERM and a partial ester of glycerol and fatty acids or unsaturated acids, (for example, glycerol mono-cytoleate), a mixture of ERM with a partial ester of glycerol and fatty or unsaturated acids. Instead of the glycerol partial ester, diethylene glycol partial ester and the same acids can be used. A mixture of stearates, barium and cadmium, calcium and zinc stearates, organotin compounds, for example, dioctyl tin thioglycolate, etc., is used as a heat stabilizer. The composition can also include the addition of fillers, smears and other components. Compositions prepared according to this method are distinguished by uniform distribution of liquid additives. P. p and me R 1. 3 weight. h DOP mixed with 5 wt. h MBS for 5-10 min. 100 weight. h, PVC C 5860 PZh, 0.5 wt. h. barium stearate, 1.5 wt. including cadmium stearate, 0.2 wt. including stearin is mixed. at 8 ° C for 7-8 minutes and the mixture is introduced at this temperature. Continue mixing the components for 10-12 minutes, and then the mixture is cooled. From the prepared composition, the roller is rolled for 8 minutes and pressed under pressure, 210 Pa plates with a size of 13017 ~ 4 mm. Impact strength is determined from above, by cutting at 2 ° C on samples No. 2 according to GOST 4647-80. The melt index of the composition is determined according to GOST 11645-73 at 190. and an additional weight of 21.6 kg., In the table below, the compositions of the compositions, methods for their preparation and properties.

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that It can be seen from the data in the table that using the method of obtaining the COMPOUND according to the invention improves the processability of the composition (increases the melt thickness) and maintains high values of impact viscosity (see examples I-IO). Mixing the plasticizer with MBS at 12О-14О С and their subsequent mixing with PVC at 8О-9СГС leads to a decrease in the melt index and a decrease in impact in akoot composition (see examples 11-18). When the mixing temperature of the plasticizer-MBS blend with PVC decreases the processability of the compositions deteriorates (see Examples 19-23). By reducing the plasticizer content of the PVC, the composition is almost not 1; With an increase in the content of the plasticizer (more than 10 weight, h), the heat resistance of the composition decreases. Reducing the modifier content does not lead to an increase in toughness. An increase in the conjugation of the modifier is not economically feasible, since there is no increase in the impact strength b iaaaoB and a decrease in their strength properties is observed,. Formula and 3 b jp e shadows: A method of obtaining a polyvinyl chloride polymer composition, which includes preliminary mixing of the plasticizer with the modifier - a copolymer of methyl methacrylate, butadiene and styrene and the subsequent mixing of the mixture obtained with polyvinylchloride and thermal stabilizer at 8О-9О С, about t l and due to the fact that, in order to improve With these compositions and impact strength, the preliminary mixing of the plasticizer with the modifier is carried out at 1825 ° C in a ratio of (0.2-2.0): 1, Sources of information taken into account in the examination 1. Zalamaeva G. A. and others. Mixing two components on the properties of the resulting material - Plastics, 1977, Ma 7, p. 34. 2.Patent of the SRR M 63892, cl, C 08 L 27 / O6, published in 1978. 3. Zavarov T. V, et al. Regulators. properties of the material based on polyvinyl chloride and a copolymer of methyl methacrylate, butadiene and styrene units using low molecular weight components. - High Molecular Compounds, 1980, A 22, No. 10, s, 2186-2192 (prototype).

Claims (1)

Formula and method A method for producing a polymer composition based on polyvinyl chloride, including a modifier with a modifier — a copolymer of methyl methacrylate, butadiene and styrene and subsequent mixing of the resulting mixture with polyvinyl chloride and * thermostabilizer at 80-90 ° С, about t and characterized in that, in order to improve the processability of the composition and preserve the toughness, preliminary mixing of the plasticizer with the modifier is carried out at 1825 ° in the ratio (0.2-2.0): 1.