JPS6087879A - Sound and vibration insulating treatment of car body - Google Patents

Abstract

PURPOSE:To enable the rapid and easy treatment for insulating sound and vibration at low cost by coating a rubber-asphalt emulsion composition along with a coagulant as a treating agent, and drying. CONSTITUTION:A rubber-asphalt emulsion composition as a treating agent is composed of a rubber component and an anionic emulsion consisting essentially of an asphalt component. The ratio of the rubber component is regulated to 20- 60%. Meanwhile, a coagulant composition is composed of an aq. soln. contg. 5-15% organic compd. and inorganic compd. contg. ions selected from more than bivalent metallic ions such as Ca, Mg, Zn, and Al and NH4 ion, and combined with an ionic bond. Both compositions are separately and simultaneously coated on a surface to be treated, and dried to form a rubber-asphalt film.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for soundproofing and damping a vehicle body, and more specifically, to a method for forming a rubber asphalt film as a soundproofing and damping layer on the ceiling and floor of a motorized motorcycle.

Usually, the ceiling of the vehicle body is made of synthetic resin-covered felt or 7-ohm synthetic resin material for heat insulation and soundproofing, and a layer of polyvinyl vinyl sheet, woven material, or knitted material as a surface layer. There are so-called pasted ceilings that have a layered structure, pre-formed ceilings and cams that are fixed in place, and suspended ceilings. On the other hand, the upper floor surface of the car body is usually covered with a pre-formed heat-melted sheet τ shield made of bituminous material, amorphous resin, or a luminescent filler material for soundproofing, heat insulation, and arc control. After that, the method of applying a VC shield on the floor of the car body by completely heating the VC knowledge bath type sheet at the same time as the dry ground with the regulation of crash charges was abandoned.

However, the soundproofing and
The vibration damping material has a relatively low unit cost, but it also requires time and effort to fix the mounting to the rigid shape of the vehicle, resulting in a drawback in terms of productivity.

So, the present inventors decided to do it themselves! After various studies were conducted on mushroom-proofing and vibration-damping treatment methods for the ceiling and floor surfaces of the M-car body, it was found that rubber anuphart emulsion was combined with an acid compound as a treatment material, and the same agent was used at the same time as the treatment material. The speed of work is improved, it does not require a lot of energy like drying conditions for paint, and it is possible to apply a curved surface layer, reducing material costs and making it comparable to interior finishes.
The present inventors have discovered that 2 and production efficiency can be achieved, and have come to construct the present invention.

That is, the investigation was conducted by applying 20 to 60% (car weight %, the same shall apply hereinafter) of styrene-getadiene rubber or acrylic to the upper surface of the ceiling and floor of the JG. A rubber asphalt emulsion composition containing acid Nterpo combination rubber and asphalt color 7i, and (b) Ca
A coagulant composition consisting of one water bath containing 5 to 15% of an ion injection compound containing ions selected from , Mg, AI, Zn, and NH4 ions was sprayed into the pot from four separate airless spray holes. This article relates to a soundproofing/vibration-damping treatment method for a car body, which involves applying one coat of rubber without making contact with the footrest, and then drying it to form a rubber asphalt backing.

The rubber asphalt emulsion composition (a) is composed of an anionic emulsion containing rubber component 2 and an asphalt component as essential components, and the ratio of the rubber component in the essential components is 20 to 60%. It is preferably set within a range of 20 to 50%. If the rubber asphalt thickens by 20%, its softness at low temperatures below 0°C will be lost, and the rubber asphalt will break during the first shake when driving a car, or the A weir will be damaged. Things to do 9
If it exceeds 60%, the unsoftened property will be the same as above, but the anti-marking effect of the base steel sheet will be reduced, and problems will arise in economic efficiency, which is one of the problems of the present invention.

Under such -t7S conditions, as the above-mentioned rubber components, nutylene-butadiene compound rubber, such as random alternation or block of styrene and butadiene rubber, and K of carboxyl group-modified styrene and butadiene are used. Emperor 8
In addition, styrene containing 5 to 30% of conjugated styrene is used. Alternatively, other rubber components such as acrylic acid ester yarn copolymer rubber having rubber 9III properties may be used instead of or in addition to these nutylene-butadiempo co-fiber rubbers. , Specifically, acrylic esters having an alkyl base number of 1 to 5 in the ester moiety (for example, acrylic acid methyl, ethyl, propyl,
Alkyl esters such as inpropyl, n-butyl, ingtyl, 5ec-butyl, t-butyl, etc.) can be used alone or in combination with 1 or more acrylic esters. Compatible vinyl monomers (e.g. acrino, methacrylate, methyl methacrylate).

Ethyl, propyl, inglovir, n-butyl.

Inbutyl, [-butyl, hexyl, octyl.

Alkyl esters such as 2-octyl, 2-ethylhexyl, decyl, dodecyl, stearyl, etc., acrylonitrile, methacrylonitrile, styrene, ethylene, vinyl, etc. should be used for two or more types, especially glass It is preferable to adjust the transition temperature to -20°C or less.]
An example of this is a rubber joint with a rubber band.

These rubber components are usually 50 to 75% (1) in the form of an emulsion (latex) obtained by emulsification according to a conventional method in the presence of a D-conjugated monomer τ anion-bearing surfactant. Hereinafter, this will be referred to as rubber emulsion.

On the other hand, as the asphalt component, for example, natural asphalt, straight asphalt, blown asphalt, etc. are used. I like it.

In order to distribute such an asphalt component to the rubber component to obtain a rubber anuphart emulsion, for example, a method of directly cooling and emulsifying asphalt that has been heated to a high temperature while pressing down on the hot edge of a rubber emulsion, 17. A method of emulsifying hot-bathed asphalt in a pre-heated surfactant bath with stirring to obtain an asphalt emulsion with a solid content of 50 to 85%, and mixing this with a rubber emulsion. Rubber asphalt emulsions that can be used as floor coverings (6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2), for example, are commercially available from Nippon Kanso Rubber Co., Ltd. under the part name "JsR Spraysion", and are manufactured by hand. The monkey is the one who does it.

The above-mentioned rubber asphalt emulsion may be added with a rich repellent as required.

For example, as a filler, calcium sulfate, clay, talc, silica, gui silicate, etc. can be added to IU2, especially 4\Kanming VC.
fl: Rubber powder, pumice powder, fly ash, Teshiranu balloon, charcoal-based medium ball, etc. Lightly medium spherical △ ■ If you use powder, ■ ``It's embarrassing because it improves the custom order.

Other additives include plasticizers, film auxiliaries, pigments,
Stomach agent, antioxidant, anti-foam F11, anti-freezing agent, pH adjustment 71II are added, and by combining these with Nd, solid content of 80% or more and viscosity of 10,000~
30 (at 100CPS/20°C) is also a non-market coefficient (the viscosity at 2KPM rotation on a B-type viscometer is 20
A rubber asphalt emulsion is obtained which is adjusted so that the viscosity (divided by the viscosity during RPM) is in the range of 3.0 to 5.5. The above solid content is 80%. % solids content.Also, if the above viscosity is less than 10,000 CP8 and the viscosity is less than 3.0, sagging may occur when applied to ceilings or vertical surfaces, resulting in poor stickiness. It is necessary to make the retention factor 3.0 or more. If the viscosity exceeds 30,000 cps, problems such as insufficient discharge properties will occur. In particular, adjustment of these viscosity and flow pressure 1"]: As a shielding agent It is preferable to use reeds made of cellulose thread.

The coagulant used in the present invention is composed of one water bath containing 5 to 15% of an ionic compound obtained by coagulation-11. The above-mentioned ionic compounds include metal ions 7 (1!71, such as Ca, Mg, Zn,
AA' ion) and 1Ni (4 ions), referring to inorganic 8-products and organic compounds that are ionically bonded, and specifically (fc hac; a CA' 2
, (CH3C:00) 2Ca, amino acid calcium (glycine calcium, alanine calcium, serine calcium salt, threonine calcium salt, methionine calcium salt, phenyldialanine salt lucium, asparagine calcium %7xE), pantothenic acid strength l Examples include lesium dianide, makufusium, minghan, tokuwa aluminum, ωit ammonium aluminate, ammonium nitrate, ammonium chloride, amino chloride zinc, amino puerile magnesium salt, etc., and one of these A coagulant water bath solution is prepared by dissolving the coagulant in a range of 0.5 to 15% using each other or two or more in combination. Force 4 The ionic compound has the property of neutralizing the surface area of the emulsion particles and causing a threshold effect, so it destroys the emulsion particles almost instantly when the ionic compound and the emulsion particles come into contact, and destroys the emulsion particles by one contact of the particles. Since 5M is caused, the emulsion particles form a continuous film, and the medium displaces the filter water to form dust. Therefore, it is effective to disperse emulsion particles and form a film by such a method, which is useful for later drying of water and its promotion, and requires less energy for drying.

The method for soundproofing and vibration treatment of car bodies according to the present invention is to apply Joun's rubber asphalt emulsion composition C (hereinafter referred to as rubber asphalt composition) and a coagulant composition to MIJ. This is carried out by simultaneously coating the VC (outer surface and/or floor top surface) and then drying the mixture to form a rubber asphalt group.

Specifically, both sets of acids are sprayed from separate nozzle holes using an airless spray device so as to mix and contact each other in a spout. As a result, coating on the M-treated surface
If', the emulsion particles are mixed together, so
It is important to obtain rubber asphalt of the desired thickness with almost no flow deformation or sagging even when the transmission thickness increases. In particular, the solid content ratio of the rubber asphalt composition and coagulant composition is determined from 10010.5 to 1B (M
Jm ratio), preferably in the range of Zoo 15 to 10 (■Gravity ratio). For this simple reason, I adjusted the spray gun so that the l trade range was empty.
"v -)) - Use a metal spray gun or use a two-head spray gun (example is made by Vinkunu Manufacturing Company, Inc. in the United States)
OMPONENTSI)RAYGUNJ)gold can be used for L. For the spraying method, it is preferable to use an airless type spray gun, which is less likely to cause one member to fly out.
Yes.

2. The above-mentioned Nupre coating is usually done by pre-forming the vehicle steel plates, degreasing the vehicle after assembly, performing chemical conversion treatment and electrodeposition coating, and then drying the coating to 0°. 5-5.
It is called 11 so that it becomes Onun. In the drying section, the room temperature and paint preparation (=J should be done at the same time as the drying floor).Furthermore, for the purpose of beautifying the interior of the car, a surface layer of Yangsuke polyvinyl sheet was applied to the ceiling, and a surface layer was applied to the floor surface. In this case, you may apply two coats of surface finish to the bed.Reeds, other temporary surfaces that are likely to be hit by flying stones when driving, such as the underfloor of an automobile 4I, wheel well, and underside of the door. It can also be applied as a chipping-resistant coating.

As described in detail above, if the present method is applied to a vehicle car, it will be possible to improve the efficiency of automobiles by one level compared to the layer and fixing work of the conventional method of ceiling protection sheet reed or wooden round sheet. In the assembly line, the various shapes and shapes can be cut and used properly, or the cutting can be cut and mixed, and the shape can be mixed and matched without hesitation, leading to improved productivity. In addition, it can be easily adapted to situations such as the unevenness of the car body's vertical position and vertical slope without any special countermeasures.

In short, I will give a real/#L example and explain it more concretely than this defense.

￥Example 1 Rubber asphalt emulsion ・・・・・・・・・1
00th M sword Lucium ・・・・・・・・・ 60 Shira 7
Balloon ・・・・・・・・・ 3゜Ethylene glycol ・・・・・・・・・ 3 Menal cellulose (3% water soluble) ・・・・・・・・・ 5 swords ・・・・・・・・・・・・2 Erasing Rhinoceros] (Silicone Polymer) ・・・・・・・・・05
Umbrella viscosity 23000 CPS, solid content 81.0%, viscosity V
fX number: 4.0 Water: 80 Aluminum sulfate: 20 Each of the above compositions was prepared using an airless pressure pump (pressure ratio: 35:1.
20:1) led to the Airenu type three-head Nubre gun,
Rubber asphalt, the solid content ratio of the l111 composition and the solidifying agent composition was 100:20, and the discharge failure was 3. A steel plate (30X 30 an
) at 3.01 (y/tsunoi).

As a result, the treated surface obtained was almost in a semi-gelled state, hardly flowing and having poor shape.

The surface finish of the reeds was separated from the water and had a slight peel-like appearance, but it formed a uniform film, and the thickness of the dry-baked rubber asphalt group was 2.11 stitches, with pinholes penetrating the base material. No other defects were observed. In addition, the film (above type) has good resistance to the base base, and there was no porcelain or -A type even in the mandrel bending test (-20°C) #, under an atmosphere, 25mm diameter). Demeri, and also 2 by Uesui Fount G Test Shun (JO time's Motosabi Note check was also good and fortune-telling.

Example 2: Coated asphalt emulsion...old...lo
Ojiwa calcium river... 5゜mhJj (1
00 mesh] ...Old...40 Hydroxyethyl cellulose (5% water/n/f)...5 Ethylene glycol...3 Antifoaming agent
・・・・・・・・・ 1 Water ・・・・・・・・・ 2 ” 1aJ3: 25000 cps, solid content 81.5%
, viscous pressure coefficient 3.8 Water ・・・・・・・・・ 80 Polarizing sword Lucium ・・・・・・・・・ 5 Self “Acid forceps”
・・・・・・・・・ 15 Both compositions above? Strain the ball from Example 1 and apply it to an electrically coated steel plate, then heat at 80°C for 1
Dry glands silently for 5 minutes. The Gomuanufalt tribe is condemned,
I hit a long hit with no problems with Arayae, -20'C prayer υr3, and light rust.

Patent applicant: Sunstar Giken Co., Ltd. Agent: Patent attorney: 1 other person, including Aoshi and Shiro

Claims (1)

[Scope of Claims] (a)
Rubber anuphart emulsion idi consisting of 20 to 60% nutylene-butadiene yarn, rubber or acrylic acid ester compound rubber, and asphalt.
A coagulant composition consisting of an aqueous solution containing an acid and (b) 5 to 15% of an ionic compound including ions selected from Ca, Mg, A4, Zn and NH4 ions, and a separate airless type. Spray from the spray hole and mix in nitrogen! IQ! It Saichi+i: A soundproofing/vibration damping treatment method for a car body, characterized by applying it while drying, chipping it and drying it to form a rubber asphalt l-1 pattern. 2 The solid content ratio of the above rubber asphalt emulsion composition] and the coagulant m acid (b) is 10010.5 to 1
5. The method according to claim 1, comprising: 3. The drying of the rubber asphalt film is as follows: Ob~5.
The method according to claim 1.