SU1317002A1 - Polymeric composition - Google Patents

Abstract

The invention relates to compositions based on glass fiber-filled polyolefins and can be used for the manufacture of structural products for technical purposes, for example, industrial fans. The purpose of the invention is to reduce the wear capacity of the composition and 10 to 12 times increase the service life of processing equipment when processing additional content in the composition of 0.10-1.50% by weight of organosilane and 0.05-2.00% by weight of siloxane rubber by 54 , 50-84.35 wt.% Polyolefin. The composition also contains 30.00- 40.00 wt.% Glass fiber, finished with 0.006 wt.% Organosilane, or a mixture of it with a silicate filler selected from the group comprising kaolin, talc, mica in a ratio of 9: 1-1: 3, and 1.00-2.00 wt.% Bismaleimide. 1 tab. c (O (L

Description

The invention relates to composite filled polymeric materials, namely glass-filled polyolefins, which are used for the manufacture of structural products for technical purposes, in particular for the manufacture of parts for industrial fans.

The purpose of the invention is to reduce the wear capacity of the filled polyolefin compositions while maintaining the physicomechanical properties.

The composition uses dimethylsiloxane rubber SKTN-1 of grades A B, C, D, having a molecular weight of (12-75) -10 and dimethylphenylsiloxane rubber SKTNF) containing 1.5% of phenyl radicals.

Vinyltriethoxgshan (HTES), vinyltriethoxysilane (GVS-9), 6-amino (hexylamino) triethoxnlan (ADE-3), epoxypropoxypropyltriethoxyanane (ES-1) or different combinations have been used as organosilane, and various epoxypropoxypropyltriethoxyanane (ES-1) or different combinations have been used. ratios x, 3-amino-propyl tristoxysilane (AGM-9).

Bismapimide is a reactive bifunctional monomer used as a modifier for polyolefins. 4,4-dithiodiphenyl-dimaleimide (DTDFDMI), m-phenylene-1,3-bismaleiuid (maleim, cf) are used in the composition.

Fiberglass - chopped glass roving. Fiberglass can be used in combination with dispersed lamellar silicate filler (talc, mica, kaolin) in known ratios, from 9 °, 1 to 1: 3, respectively.

Of the polyolefins in the composition, isotactic polypropylene (PP) 5 is used having a melt flow rate. 2-6 g / min, or high density polyethylene (HDPE) with melt flow rate 2-8 g 10 mi and / or propylene block copolymer with ethylene (BO PES) with melt flow rate 2-4 g / 10 min.

The composition may also include stabilizers, dyes, flame retardants and other targeted additives.

The compositions are prepared using various known techniques: mixing the polymer melt with additives in an extruder or in a Banbury mixer, followed by granulation.

0

five

five

50

50

five

0

The composition is processed by injection molding, vacuum shaping, extrusion.

Evaluation of the effectiveness of the additive introduced to reduce the wear activity of the composition to reduce wear; processing equipment is carried out according to a method that simulates the working conditions of the dosing zone of the worm plasticization unit, since it is this zone that is the most worn out and its condition em the main parameters of the processing.

The effect of the additive on the physicomechanical properties is assessed according to standard methods for testing plastics on samples obtained by the injection molding method.

PRI m e, p 1 (control). Polypropylene is melted and mixed with fiberglass, extruded, granulated. Samples for physical and mechanical tests are made from granules on a casting machine.

In order to assess the wear activity of the composition, it is processed on an extruder equipped with a special device at a melt temperature of 503 K and a pressure of 21 MPa, and the specific wear rate of equipment is determined according to GOST 23002. To determine the expected service life of equipment, the composite material is tested method.

Example 2 (control). Polypropylene and polyethylene are melted and mixed with siloxane rubber and fiberglass. Sample fabrication and testing is carried out as in Example 1.

PRI meri 3 (the prototype). The polypropylene is melted and mixed with m-phenylene-153-bis-maleamide and glass fiber. Sample preparation and testing was carried out as in Example 1.

Example 4 (prototype). Polypropylene is melted and mixed with m-phenylene-1,3-bismaleide, fiberglass and mica. Sample preparation and testing was carried out as in Example 1.

Example 5 (control). Polypropylene is melted and mixed with m-phenylene with 1,3-bismaleimide, calcium stearate and glass fiber.

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samples and their testing

Manufacturing

carried out as in example 1.

Example 6 (control). Polypropylene is melted and mixed with m-phenylene-1,3-bismaleimide, vinyltriethoxyethoxylan, and glass fiber. Sample fabrication and testing is carried out as in Example 1.

Example 7 (control). Polypropylene is melted and mixed with m-phenylene-1,3-bismaleimide, sanitary rubber and glass fiber. Sample fabrication and testing is carried out as in Example 1.

Examples 8,13 and 15. Polypropylene is melted and mixed with m-phenylene-1,3-bismaleimide, various organosilanes and siloxane non-caoutchouc, glass fiber, various silicate fillers in different ratios. Sample fabrication and testing is carried out as in Example 1.

Example 14. Compositions are made and tested as in Examples 13 and 15, but a block copolymer is used as the polyolefin.

Example 16. The composition is made and tested in examples 8-16, but polyethylene is used as the polyolefin.

Examples 17-22 (control). The compositions are made and tested as in Examples 8-16, but organosilanes and siloxane rubbers are used in ratios that have exorbitant values.

70, 0 - 30.0

58.50 10.00 - 30.0 (prototype) 69.00 23, 00 The recipes and properties of the polymer compositions obtained in Examples 1-22 are shown in the table.

The service life of the working bodies of the processing equipment during the processing of the proposed composition is more than 10-12 times during the processing of the composition of the prototype.

Claims (1)

Invention Formula A polymer composition comprising a polyolefin, bismaleimide and glass fiber, sized 0.006 wt. an organosilane, or a mixture thereof with a silicate filler selected from the group including kaolin, talc, mica and bismaleimide, characterized in that, in order to reduce wear, the composition additionally contains organosilane and siloxane rubber in the following ratio, wt.%: Polyolefin Fiberglass, fitted 0.006 wt.% Organosilane ,. or blend it with silicate on 55, 90-68,85 30.00-40.00 1.00-2.00 0.10-1.50 0.05-2.00 1.00 Table continuation , 00 1.00tjoo 1.00 1.00 1.00 t, 50 1.00 LOO tsoo 1.00 2.00 2.00 1.00 1.00 1.00 1.00 VET 0.1 1.00 1.00 1.00 1.00 1.00 1.50 Ojo 1.30 1.50 1.60 1.60 1.00 Example Siloxane rubber i SKTN-1 CKTH-t SKYF 1 (control) 2 (control) 3, (prototype) four (prototype) five (control) 6 (control) 2.00 0.05 Physical and mechanical properties | Udvlna -. ....... ... jCKOpOCTb elixiate Calcium Stearate Destructive pressure during decomposition, MPa Vick heat resistance, C Shock on s-p1zn1viva bone, KfUf / tt : no sbreets steel: 38x2MOA, i g / cm 35.00 116.00 20.0 30.00 99.0 20.0 , 00 85.0 85.2 70, l 78.2 70, t 70.00 t47.0 39.2 145.0 37.2 138.0 32.3 143.0 138.0 140.0 36.9 32.3 36.4 9.89 9.88 9.89 9.87 9.88 9.83 9.88 1.25 1317002 - Minimum and maximum values of specific velocity and insertion are given, and obtained when testing the same composition. VNIIPI Order 2392/22 Circulation 437 Subscription Arv-polygr. pr-tie, Uzhgorod, st. Project, 4 10 Continued, tables (