RU2340640C1 - Vibration-and-noise absorbing acoustic-insulation material - Google Patents

Abstract

FIELD: construction industry.

SUBSTANCE: vibration-and-noise absorbing acoustic-insulation materials are produced on the basis of bituminous compositions and are meant for use in automobile construction industry. Vibration-and-noise absorbing acoustic-insulation sheet material is made from composition based on bitumen, rubber and filler. Synthetic butadiene-styrene rubber is used as rubber, and chalk is used as filler. In addition vibration-and-noise absorbing acoustic-insulation sheet material includes ethylene-vinyl acetate copolymer, dibutyl phthalate and off-grade basaltic wool. Material components ratio is as follows, wt %: oil bitumen - 17.0-23.0, synthetic butadiene-styrene rubber - 8.0-10.0, ethylene-vinyl acetate copolymer - 1.0-2.0, dibutyl phthalate - 1.0, chalk - 60.0-65.0, and off-grade basaltic wool - 5.0-10.0.

EFFECT: effective decrease of engineering constructions vibrations and engine noise at the compartment of transport means.

2 tbl

Description

The invention relates to vibration damping soundproofing materials made on the basis of bituminous compositions and intended for use in the automotive industry to effectively reduce vibration of engineering structures and engine noise in the vehicle interior. Widely used vibration-absorbing soundproofing sheet materials based on bituminous compositions contribute to a significant isolation of the vehicle interior from vibration and noise - this is usually thermal insulation of the passenger compartment (floor and front panel), consisting of a pile carpet, heavy insulating layer (bitumen septum on Russian cars) ) and a porous layer, for example, a non-woven cotton cloth - “porozo”.

A known composition for the manufacture of vibration-absorbing material, including bitumen, asbestos, latex and additionally styrene-indene resin and barite concentrate in the following ratio of components, wt.%: Bitumen 25-27, asbestos 13-15, latex - 1-2, styrene-indene resin - 4-6, barite concentrate - 50-57 [Aut. St. USSR 0960052, class B32B 11/00, C04B 43/00].

The disadvantages of this composition are the presence in the recipe in a large amount of 13-15 wt.% Carcinogenic filler - asbestos and inaccessible, expensive filler - barite concentrate.

Known vibration-absorbing sheet material, intended, for example, for use in automotive machinery for isolating the vehicle interior from vibration and engine noise, made of a composition based on bitumen, including parts by weight: oil bitumen 100, graphite 8.0-12.0 , kaolin 60-80, talc 40-60 [Patent RU 188214, 2 IPC С08L 95/00, В32В 11/02, В60R 13/08].

The disadvantages of this material are insufficient heat resistance and a low value of the loss coefficient.

Known sheet sound-absorbing material made of bitumen, rubber crumb and as a filler - graphite shavings and asbestos, taken in the following ratio, wt.%: Bitumen 53-54, crumb rubber 34-35, graphite shavings 2-10, asbestos 2- 10 [Auth. St. USSR 1060602, IPC С04В 43/04, 43/02].

The disadvantages of this material are the presence in the formulation of a carcinogenic filler - asbestos, low strength of the material and the ability to soundproof, as well as the inaccessibility and small volumes of other raw materials - graphite chips.

A vibration-absorbing material was selected as a prototype, consisting of rubber, bitumen, plasticizer, lubricant and filler in the ratio, wt.%: Bitumen - 60-70, butyl rubber - 10-20, industrial oil - 10-20, stearic acid 2-3 , technical carbon 34-44, aluminosilicate microspheres - 17-22 [Patent RU 2235106, 2 IPC C08L 95/00, C08L 23/22, C08L 93/00, C08K 3/04, C08K 7/18].

The disadvantage of this material is not high enough soundproofing ability.

The objective of the invention is to expand the spectrum of the range of vibration absorption and sound insulation, in particular, materials based on bitumen, improving vibration absorption, soundproofing and strength properties while reducing the weight of car parts and maintaining high heat-resistant properties of the material.

This is achieved by the fact that the created vibration-absorbing soundproofing sheet material is made of a composition based on bitumen, including, wt.%: Petroleum bitumen - 17.0-23.0.0, synthetic styrene-butadiene rubber - 8.0-10.0, ethylene copolymer with vinyl acetate - 1.0-2.0, dibutyl phthalate - 1.0, chalk - 60.0-65.0, substandard basalt wool - 5.0-10.0.

Distinctive features of the claimed vibration-absorbing sheet material from the prototype are: use as a filler instead of carbon technical - chalk - 60.0-65.0%; instead of butyl rubber - synthetic styrene-butadiene-15 rubber - 8.0-10.0% and a copolymer of ethylene with vinyl acetate 1.0-2.0%; instead of microspheres of aluminosilicate - substandard basalt wool - 5.0-10.0% of the total weight of the composition.

The effective thickness of the sheet made from the specified composition is 1.5-3.5 mm

A method of obtaining the proposed vibration-absorbing sound-insulating sheet material involves preparing a bitumen composition in a mixer, where the remaining ingredients are introduced into the bitumen preheated to 150-170 ° C, mixing for 30 minutes and calibration on rollers in a sheet.

For the manufacture of sheet vibration-absorbing soundproofing material used raw materials shown in table 1

Substandard basalt wool is a waste of thermal insulation of reactors of nitrogen-oxygen stations of JSC Saratovorgsintez. Substandard and air-conditioned basalt cotton wool of metro station BSTV (manufacturer of Ivotsteklo OJSC, Ivot, Bryansk region, TU 21-23-247-88) is mentioned by Stepanova E.V. in the dissertation for the degree of candidate of technical sciences for special. 11/05/06 “Technology and processing of polymer compositions”, whose theme was “The structure and properties of basalt plastics reinforced with basalt fibers from different manufacturers, and their modification with physical and chemical methods” (11/22/2006).

Examples of the performance of sheet vibration-absorbing material and the results of its tests are given in table 2.

The proposed vibration-absorbing sheet material can be used independently and be a layer of a sound-absorbing sound-absorbing sandwich panel, which additionally includes a layer of porous material based on cotton and synthetic fibers, polyurethane foam, polypropylene, basalt and other fibers. A layer of decorative material may be applied to the surface of the porous material.

The ability of the samples of materials to sound insulation was determined in accordance with the method And 3173.37.101.011-99 "Determination of the ability of the material to sound insulation". When determining the ability to soundproofing, the Pisa Tower bench installation was used (manufactured by Riter, Italy). The essence of the method used is to determine the difference (in dB) between the sound pressure levels in the measuring chamber of the stand when installing a steel substrate 1 mm thick without the studied soundproofing material sample and installing a steel substrate with the studied soundproofing material sample.

Information sources

1. A.S. 0960052; declared 11/01/2000; publ. 08/27/2002.

2. Patent RU 2235106, 2 IPC C08L 95/00, C08L 23/22, C08L 93/00, C08K 3/04, C08K 7/18.

3. Stepanova E.V. The dissertation for the degree of candidate of technical sciences “The structure and properties of basalt plastics reinforced with basalt threads of different manufacturers, and their modification with physical and chemical methods” (11/22/2006).

Table 1 No. p / p Name of ingredient Designation one Bitumen of the oil brand "Plastbit - II" TU 38 101580-75 2 Synthetic butadiene-styrene rubber SKS-30ARKM-15 GOST 11138-78 3. DBP Dioctyl Phthalate GOST 8728-88 four. Chalk MTD-B TU 5743-114-00149289-2000 5. The copolymer of ethylene with vinyl acetate "Sevilen" TU 6-05-1636-97 6. Substandard basalt wool

table 2 Component Name NTD one 2 3 four 5 6 Bitumen (Plastbit 2 brand) 17.0 19.0 20,0 20,0 21.0 23.0 Savilen M. 11306-075 1,0 1,0 1,0 1,0 2.0 1,0 Dibutyl phthalate 1,0 1,0 1,0 1,0 1,0 1,0 Chalk (MTD-B brand) 65.0 64.0 63.0 65.0 63.0 62.0 Styrene butadiene rubber 8.0 8.0 10.0 8.0 8.0 8.0 Basalt Cotton Waste 8.0 7.0 5,0 5,0 5,0 5,0 Physical and mechanical properties TU 38.105.161 9-87 Conditional tensile strength, kgf / cm ² , not less - in the longitudinal direction 3.0 3.65 3.62 2,8 2,5 2,3 2.2 - in the transverse direction 2.0 2.7 2.6 1,6 1.4 1.33 1.3 Elongation at break,%, not less than - in prod. direction 60.0 70.0 75.0 89.0 92.0 80.0 82.0 - in the transverse direction 65.0 76.0 82.0 91.0 97.0 83.0 83.0 Density, kg / m ³ , not less 1550 1406 1489 1550 1580.0 1548.0 1536.0 Sound insulation ability, dB, at least, at a frequency of Hz 400 5 8.2 8.4 9.6 9.7 9.2 6.6 500 6 12,4 12.5 13.3 13,2 12.8 12.1 630 10 17.8 17.9 18.5 18.6 17,2 15.4 800 12 23.0 23.1 23.5 23.6 21.3 19,4 1000 16 24.5 24.3 24.2 24.8 22.2 20.3 1250 eighteen 29.3 29.3 29.4 29.6 23.6 20.9 1600 22 36.7 35.8 34.9 34.3 31,2 29.4 2000 thirty 43.8 42.9 42.9 43.1 38.6 33.6 2500 29th 36.7 36.8 34.1 34.2 36.9 31,4 3150 29th 34.2 33.6 33.7 33,2 29.8 28.5 4000 35 41.5 41.3 41,4 42.3 34.5 29.6 5000 40 43.5 43,4 41.9 42.1 34.6 29.9 6300 48 46.6 46.6 48,4 45,2 36.1 30,2

Claims (1)

Vibration-absorbing soundproofing sheet material made of a composition based on bitumen, rubber and filler, characterized in that synthetic rubber is styrene butadiene rubber, it contains chalk as a filler, the material further includes an ethylene vinyl acetate copolymer, dibutyl phthalate and substandard basalt wool in the following ratio, wt.%: oil bitumen 17.0-23.0 styrene butadiene synthetic rubber 8.0-10.0 ethylene vinyl acetate copolymer 1.0-2.0 dibutyl phthalate 1,0 a piece of chalk 60.0-65.0 substandard basalt wool 5.0-10.0