JPH01313351A - Insulating material - Google Patents

Abstract

PURPOSE:To enhance sound insulating and radiation shielding effects by using resin mortar contg. aggregate and powder of a high atomic weight metal. CONSTITUTION:A resin mortar insulating material is obtd. by blending aggregate such as hollow siliceous spheres with powder of at least one kind of high atomic weight metal selected among lead, iron and nickel and solvent-soluble acrylic resin, acrylic-urethane resin, epoxy resin, etc., as a binder. The amt. of the metal powder used is regulated to 50-98wt.% of the total amt.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention prevents sound or radiation generated from a limited space from propagating to other spaces, or conversely prevents sound or radiation generated in a music space from propagating to other spaces. This article concerns a barrier material used to block only a limited space.

(Prior art) Conventionally, as a means of preventing the propagation of sound and radiation from the space in which they are generated to other spaces, sheets of metal iron or buttons, or such sheets and rubber, plates, resin plates, or concrete have been used. 1
- There is a shielding material that can be used in conjunction with a shade. Also, as a sound reducing material, there is a paint containing lead powder, and as a radiation reducing material, a lead oxide pigment paint is known.

(Problem to be solved by the invention) However, most of the sound insulation materials are sound absorbing materials, and therefore the materials used are generally combined with glass, rock, slug, wool, urethane foam, plywood, hardboard, slate, etc. There are cases where the effect is large and there are cases where there is a certain limit, and in particular, in the case of sound insulation by walls, the effect is often only a supplementary proportion.

In addition, since the space that corresponds to the wall to be blocked is not necessarily plate-shaped, a hard plate-shaped material cannot follow this, and liquid paints that can follow any shape cannot be used with high-density materials such as lead and iron powder. It is difficult to contain substances in an effective heavy state. Even if it were contained, there would be problems with workability due to dripping when applied vertically, and for this reason, such paints have not been put into practical use to date.

Therefore, the purpose of the present invention is to prevent leakage of sound and radiation.
The object of the present invention is to provide a barrier material filled with heavy metals of 31t'fJr material at fi density.

(Means for Solving the Problems) A feature of the present invention is that the main component of the aggregate is lead, a high atomic weight metal.
The resin mortar is made of at least one powder selected from iron and nickel, and the content thereof is 50 to 98% by weight (hereinafter simply referred to as 1%).

The resin may be any resin that does not contain components that cause electrochemical reactions with high atomic weight metals such as lead, iron, and nickel, corrosion prevention, and rust formation, and is useful as a binder, such as solvent-based acrylic resins, acrylic urethane resins, There are polyurethane resins and epoxy resins.

In addition, the content of lead, iron, and nickel powder is 50 to 98%.
However, if this is less than 50%, sound or radiation generated in a limited space will not be propagated to other spaces, or conversely, sound or radiation generated in other spaces will not be transmitted to that limited space. In order to obtain the high atomic weight metal content necessary to block only the space, the thickness of the resin mortar applied becomes thicker, which impedes the use of the space for purposes such as living.

Furthermore, there is a risk that the resin mortar applied to the wall and ceiling surfaces may peel, fall off, or fall due to its own weight. Therefore, in order to ensure the blocking effect, the content of these powders is desirably 80% or more.

(Effects of the Invention) According to the present invention, by selecting the resin to be used, the hardness can be freely adjusted from soft to hard depending on the workability.

This resin mortar can be mixed with a coloring agent, and can be finished with a rich color such as gray or brown in one step.It can also be finished with a top coat or a decorative finish, and when applied to bathrooms and toilets, it is water resistant. It often prevents moisture from leaking with waterproof materials, strongly adheres to concrete surfaces, and can be used as a soundproofing agent that also functions as an adhesive between the concrete and floorboards.In addition, it can be applied to walls and ceilings with 1 to 5 IuI at a time. Thick finishes are possible, which is not possible with conventional paints.

(Example) Next, an example in which the sound insulation characteristics were investigated will be described. Among these examples, Example-1 is a urethane-based material whose cured product is soft and rubber-like, and Example-2 is an epoxy-based material whose cured product is hard.

Example-1 50 mesh granular lead 80% silica-based hollow spherical aggregate (Nippon Philite Co., Ltd., trade name [Fillite 52/7) 1
Liquid amine containing 0% methylene orthochloroaline (65% is polyethylene glycol dipenzoe-1.
) 2% incyanate greborimer (■01 and average molecule agreement 2
000 bifunctional polyether polyol, NC
A lead mortar-like composition obtained by thoroughly mixing 0% to about 3% (Incyane 1, 8%) was made into a 12-inch thick veneer plywood and a 2-inch thick sound-insulating plywood.

A box with a height of 2 m, a length of 1 m, and a width of 1 m was constructed using this sound-insulating plywood, and a piano sound source of approximately 90 phonophones from a te-precoder was placed in the center of the box, facing the sound source from the outside of the box. 1iI from the sound source! ! Measure the sound insulation effect at the same height as the sound source using a sound level meter (JIS-C
M1 was determined using -1502 standard product).

Of course, at this time, the sound source speakers are the four that make up the box.
The microphone of the sound level meter was oriented toward the front of one of the walls, and the microphone of the sound level meter was oriented to face the speaker.

The results were 70 phons with the auditory sensation correction circuit A characteristics and 75 phons with the auditory sensation correction circuit C characteristics.

In addition, the exact size of the sound source at a position 1 m away from the sound source is 91 pounds according to the characteristics of the auditory correction circuit A.
In terms of characteristics, it was 93 phons.

Next, a 2m high, 41cm square made only of 12-inch plywood.
Using a box measuring 1 m long and 1 m wide, the 4-tone effect was measured in the same manner as described above, and the results were 77 phons for the A characteristic of the auditory correction circuit and 82 phons for the C characteristic of the audible correction circuit.

Therefore, from the above results, if veneer plywood is sound-insulated using the lead mortar-like composition of the invention, the sound energy will be approximately 7 phons, 80% in terms of sound energy (C characteristic of veneer plywood only: 82
phon is 1.6 x 10-4 watts, and C characteristic 75 phon of sound insulation treated plywood is 3.2 x 10' watts),
You can expect a sound insulation effect.

In addition, when the same test was conducted with the sound source changed to the sound of drainage water from a flush toilet, the sound insulation effect of the 6-bon was confirmed to be approximately the same as that of a piano. (The radiation shielding effect is that the lead equivalent (m+pb) of the Motosuzu mortar-like composition is 0.87 at a coating amount of 2 times the thickness, and therefore corresponds to about 6 kg/rrl' of pb.) Example-2 50 mesh granules Lead 80% silica hollow spherical aggregate (Nippon Philite Co., Ltd., product name "Fillite 5"
2/7'') 10% liquid bisphenol epoxy (epoxy equivalent weight 190 with average molecular J1380)
7% polyamide resin (Sanwa Kagakusha, product name “Sunmide #335J”)
A lead mortar-like composition made by thoroughly mixing 3% of
Made of thick, sound-insulating plywood.

When the same test as in Example 1 was conducted using this sound insulation treated plywood, the results were 70 phons in the A characteristic of the audibility correction circuit and 76 phons in the C characteristic of the audibility correction circuit. Therefore, it can be seen that the hard epoxy button mortar composition has almost the same sound insulation properties as the soft one of Example-1.

Table 1 shows the sound insulation effect of each of the above examples.

In order to obtain a substantial sound insulation (radiation shielding) effect,
201111 thickness or less is sufficient, and specific examples of the coating amount and film thickness of the lead mortar-like composition are shown in Table 2 to obtain the amount of lead necessary for sound insulation and radiation shielding. It is.

that's all

Claims (1)

[Claims] The main component of the aggregate is at least one powder selected from the high atomic weight metals lead, iron, and nickel, and the content of the powder is 50 to 98% by weight. Characteristic blocking material.