WO1991005819A1

WO1991005819A1 - Thermoplastic mass for applications of sound-proofing and vibration isolation and laminated and stratified materials obtained therefrom, particularly for motor vehicles

Info

Publication number: WO1991005819A1
Application number: PCT/ES1990/000034
Authority: WO
Inventors: Francisco Camps Codina; Neus Romero Romagosa
Original assignee: Texsa, S.A.
Priority date: 1989-10-10
Filing date: 1990-10-09
Publication date: 1991-05-02
Also published as: MX171881B; CA2044134A1; ES2017833A6; CN1050887A; TR25932A; RU2067988C1; KR920701322A; EP0450029A1; CS469290A3; BR9006946A; CS277649B6; PL165443B1

Abstract

Thermoplastic mass for applications such as sound-proofing and vibration isolation and laminated and stratified materials obtained therefrom, particularly for motor vehicles; said mass is comprised of: 0.6 to 50 % of chlorinated polyethylene; 20 t0 95 % of filler material; and 4 to 60 % of a spreader component which is so selected that the compatibility with the chlorinated polyethylene is maintained, such compatibility being defined by an anylyne point with values lower than 100 °C. Such thermoplastic mass is used to produce laminated and stratified materials intended to be installed in motor vehicles as well as in buildings and household appliances and industrial equipment and machines for sound-proofing and vibration isolation.

Description

THERMOPLASTIC MASS FOR INSONORIZATION AND INSULATION APPLICATIONS OF VIBRATIONS AND LAMINATED AND STRATIFIED MATERIALS OBTAINED FROM IT, PARTICULARLY FOR AUTOMOBILE VEHICLES

Field of the invention

The present invention has as its object thermoplastic masses as well as laminated and laminated materials obtained therefrom, which have insulating and vibration insulating properties and which can be used, in particular, in the dividing wall between the mo ¬ tor and the passenger compartment of an automotive vehicle, such as a passenger car, and, in general, in other places of cars, trains, airplanes, etc., as well as on walls, floors, ceilings, and roofs metallic buildings and in household appliances and industrial machines (in these last two cases for their vibration damping properties).

Prior art

The present applicant is the holder of the Spanish patent number 554.644 for "Procedure for obtaining a laminated thermoplastic mass and sheet obtained with said mass" as well as corresponding patents and patent applications filed in all highly industrialized countries , such as United States of America, Great Britain, German Federal Republic, France, Japan, USA

Said Spanish patent protects the exclusive for the production of a thermoplastic mass consisting of chlorinated polyethylene, mixed with an oil, which can be replaced by a plasticizer, and fillers. The content of the descriptive reports of these patents as well as the contents of the patents of the technical patents The only ones mentioned in them, are incorporated herein by reference.

Statement of the objective of the present invention

A thermoplastic mass, and laminated and laminated materials obtained from it, that are suitable for the aforementioned applications, and particularly for the dividing wall between the engine and the interior of a car, must have :

- excellent acoustic characteristics (both acoustic and anti-vibration barrier);

- good values of the property known as "fogging" (which designates the shedding of volatile materials that are deposited on cold surfaces, particularly on glass surfaces, such as the windshields of the passenger compartment of the vehicle, and decreases ¬ they see visibility through them);

- high flexibility; - easy adaptability to the other components and to the interior or enclosure walls;

- high stability and resistance against extreme temperatures;

- optimal values of Young's modulus, that is, of the elastic compression modulus, and of the mechanical loss factor (known as tangent "Delta", which measures the dissipative characteristics of energy that the material has);

- good aging and pick-up properties; - easy rolling, workability and handling; Y

- possibility of economic manufacturing.

Exhibition of the invention

The applicant, when investigating the mass and materials obtained from it, of the aforementioned paten- Spanish te 554.644, has found that the established objective can be achieved by replacing the oil or plasticizer of said patent 554.644 with an extender constituent, chosen from one or more of the following materials: low volatile plasticizers, hydrocarbon oils , asphalt and / or other materials that develop such an extender function, provided that the compatibility of the global extender component with the chlorinated polyethylene is maintained, defining this compatibility by an aniline point that, ¬dido according to ASTM T-611, method B, must have values less than 1002C, and preferably less than 702C.

Consequently, the thermoplastic mass is constituted between 0.6 and 50% chlorinated polyethylene; between 20 and 95% of a load material; and between 4 and 60% of said extender component; containing the mass in addition to minor components, in order to adapt to the intended purpose the physical properties, both of the total mass and of some of the constituents; particularly, the value of "fogging" (release of volatile materials), measured according to standard 75201, is optimal.

This thermoplastic mass is laminated, alone or in conjunction with an absorbent material, located in any position and / or in one or several layers, to give a laminated or laminated material, which is then placed in the intended place.

Also, it can be imagined to laminate the dough alone and send it in such a state to another factory, where it joins with other absorbent materials, such as porous felt, synthetic foams, wood, cork, etc., thus obtaining stratified materials that are then placed in the lu ¬ scheduled games. The choice of the extender component should adjust Take each particular case, but it is always restricted to the condition that the aniline point must be less than 1002C.

Test methods used to measure properties

a) The value of "fogging" is the release of volatile materials from the mass and the subsequent condensation of these by depositing on the cold parts, especially on the glass surfaces and in particular on the windshield of the vehicle , expressed as the amount of these volatile materials deposited on the surfaces, should be as small as possible. In addition, the deposits produced from these volatile materials must be made to have the least opacity so that vision is not impeded through the glass surfaces and, particularly, through the front windshield of the vehicle. This property is measured by DIN 75201, although SAAB SCANIA STD 1082 or FORD LAB0RAT0RY TEST METHOD EUBN 1-1 can also be used. b) The flexibility of the mass is measured by the static arrow, which is defined as the arrow that adopts a test tube placed in a false position on a mass under its own weight. It has been observed experimentally that the sheets formed by very flexible masses constitute barriers against sound superior to the sheets obtained with rigid masses. c) The behavior against low temperatures is expressed by the fragility of the materials obtained.

It is measured by dropping a 500 g steel ball from a height of 30 cm, observing whether or not cracks appear in the material at the low temperature of the test. d) The resistance and stability against high temperatures is measured by placing the material on a 75 * slope for 5 hours at a temperature of 852C, and then observing whether the material flows or not.

It has been observed that the products obtained according to the invention do not undergo any alteration or modification. e) Young's module, that is to say the compression elastic module, is measured in a Metravib instrument under a displacement of + 50 um. The tangent Delta, or tg o, represents the factor of mechanical losses and expresses the dissipative characteristics of the material. It is measured in relation to the Young's modulus measurement. A material is all the more elastic the lower the value of the E 'module (ie the real part of Young's module) and it is more dissipative the higher the value of tg or

Examples of realization

Thermoplastic masses were prepared that were numbered from 1 to 5, the mass of example 1 corresponding to a typical mass prepared according to Spanish patent 554,644 and the masses of examples 2 to 5 to masses according to the invention.

From these masses, the properties of aniline point, "fogging" and brittleness were measured according to the aforementioned test methods. The composition of the masses of the various examples as well as the measured values of the mentioned physical characteristics are detailed in table form

In these tables, (1) designates the Repex E-7 material of REPSOL DERIVADOS; (2) designates the SMR-60 material of the REPSOL DERIVADOS firm; and (3) designates the DIDP plaque (abbreviation of diisodecyl phthalate) EXAMPLES

Quantities of ingredients in parts by weight

Aromatic oil (1) 850 425

Semiromatic oil (2) 850 425

Plaster (3) 425 425 850

Load 4500 4000 4500 4500 4500

Chlorinated Polyethylene 225 200 225 225 200

PHYSICAL CHARACTERISTICS

Aniline Point (2C) 102 63 Incompatible Fogging

Fragility (2C) -5

With the masses of examples 2 to 5 and with a "witness" product already known in the market, which is based on asphalt plus an EPDM polymer (short for an ethylene-propylene-diene monomer polymer ) acoustic insulation measurements were made in the form of the soundproofing level, expressed in decibels, at different sound frequencies. These measurements have been made in an instrument called a "small cabin" consisting of two small chambers with attached anemic characteristics, separated by a metal plate. In one of the cameras there is a loudspeaker and in the other a microphone with which the sound pressure level is measured.

First, the sound pressure level is measured with the 0.8 mm steel plate, and then the one obtained if the complex formed by the steel plate, the absorbent (felt felt), is placed between both cabins 19 mm thick) and a sheet of 7 kg / m obtained according to the invention. The difference, expressed in decibels, constitutes a measure of the sound insulation of the complex formed by the absorbent material and the soundproofing material tested.

From this table, the conclusion is drawn that the test sample is less in soundproofing than in examples ^ 2 to 5.

The present invention has been described hereinbefore, particularly describing some preferred examples. However, all the variants that fall within the claims that follow are within the object of the invention.

Claims

1. Thermoplastic mass for vibration isolation and insulation applications that has excellent values of cold resistance, fogging, flexibility, aging, soundproofing, vibration isolation, pick-up , adaptability and easy laminability, consisting of: between 0.6 and 50% chlorinated polyethylene; 20 and 95% load material; and 4 to 60% of an extender component chosen from one or more of low volatile plasticizers, hydrocarbon oils, asphalts and / or other materials that perform such a function; the extender component being chosen in such a way that compatibility with chlorinated polyethylene is maintained, this compatibility being defined by an aniline point, measured according to ASTM D-611, method B, with values below 1002C and preferably below 702C; also containing the mass minor components to adapt to the intended purpose the physical properties, both of the total mass and some of the constituents, and particularly so that the value of "fogging" (material release volatile) measured according to DIN 75201 is optimal.

2. Thermoplastic mass according to claim 1, characterized in that it is laminated alone or in conjunction with an absorbent material located in any position and / or in one or several layers to give a laminated or laminated material intended in a preferred case to be placed on the dividing wall between the engine and the passenger compartment of an automotive vehicle, and in other places of cars, trains, avijj nes, etc., but also on walls, floors, ceilings, roofs: metal buildings and electrodomés. icos and industrial machines.

3. Thermoplastic mass according to claim 1 or 2, characterized in that after being laminated alone, it is subsequently stratified together with other absorbent materials such as a porous felt, synthetic foams, wood, cork, etc. , adjusting to the respective needs.

4. Laminated material obtained according to claim 2.

5. Stratified material obtained according to claim 3.