JPH08158494A - Sealing material - Google Patents

Abstract

PURPOSE: To provide a sealing material that has sufficient sealing characteristics and is excellent in handleability and on-site workability by covering a core member made from flexible materials with a cover material made from a polymer blend. CONSTITUTION: One flexible material such as rubber, urethane and resin is used singly or two kinds or more of them are combined to produce a core member 2. The core member 2 is covered with a cover material 3 made from a polymer blend having a three-dimensionally continuing network skeletal structure composed chiefly of a polymeric organic material and a low molecular weight material. The polymeric organic material has a number average molecular weight of 20,000 or more, and the low molecular weight material has a number average molecular weight of less than 20,000. The difference in solubility parameter between the polymeric organic material and the low molecular weight material is selected to be 3.0 or less.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing material,
In particular, it relates to a sealing material having excellent handleability and workability.

[0002]

2. Description of the Related Art A sealing material is applied as a gap filling material at a joint of building members. In particular, as building structures become prefabricated and lighter in weight, the joining of building members is further required, and thus the demand for sealing materials is increasing more and more. However, as the functionality of buildings has increased in recent years, it has been required to improve the water resistance and airtightness of the buildings. With regard to the sealing material, further improvement in sealing performance, and further improvement in handling and workability are required. It has been demanded.

Conventionally, there are two types of sealing materials, one of which is an amorphous type and which is filled on site, and the other of which is preliminarily molded. For example, the following materials are used.

Oil-based caulking material: A material obtained by kneading a mineral filler such as calcium carbonate and a liquid color-developing material such as oil or resin. Rubber-like caulking material (elastic sealant): Polysulfide-based, silicone-based, polyurethane-based, acrylic-based sealing material, etc. Glass putty: Similar in composition to the oil-based caulking material, and has high viscosity. Viscosity sealing material: Asphalt with rubber, butyl rubber, foamed plastic impregnated with asphalt. Gasket: Vinyl chloride or chloroprene gasket.

Such a sealing material has excellent sealing characteristics, that is, when it is filled in a joint, it follows well the mutual displacement of the materials forming the gap,
Since it does not cause defects such as cracks and cracks that hinder the hermeticity, it is required to maintain flexibility for a long period of time, and naturally, in terms of workability and workability (field workability). It is required to be excellent.

However, in the case of a sealing material of an amorphous type that is filled in the field, there is a large variation in the construction between workers, and in addition to requiring skill, until the sealing material exhibits its performance as a sealing material. There is a drawback that it requires a long training time.

When a preformed sealing material is used, a large force is required to compress the sealing material when, for example, the gap between building members becomes thinner than the original thickness of the sealing material due to variations in construction conditions. However, there are drawbacks such as poor workability.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a sealing material which is excellent in sealing property and is also excellent in handleability and workability. .

[0009]

A sealing material according to claim 1 of the present invention is a three-dimensional continuous net-like structure comprising a high-molecular organic material and a low-molecular material as main components in a core member made of a flexible material. It is characterized by being coated with a coating material made of a polymer blend material having a skeletal structure.

In the sealing material according to claim 2 of the present invention, the polymer blend material is mainly composed of a polymer organic material having a number average molecular weight of 20,000 or more and a low molecular weight material having a number average molecular weight of less than 20,000, and The difference in solubility parameter between the organic material and the low molecular weight material is 3.0 or less.

A sealing material according to a third aspect of the present invention is characterized in that the flexible material is rubber, urethane, or a resin alone or in combination of two or more kinds.

[0012]

In other words, the inventors of the present invention have conducted extensive studies as a sealing material having excellent characteristics, and as a result, by using a flexible material as the core member, the flexibility of the core member with respect to displacement such as a gap is excellent, and By covering the member with a coating material composed of a polymer blend material having a three-dimensional continuous network skeleton structure mainly composed of a high molecular weight organic material and a low molecular weight material, an extremely excellent sealing material having sufficient sealing property can be obtained. The inventors have found what can be obtained and completed the present invention.

[0013]

The present invention will be described in detail below. First, the core member to be combined with the polymer blend material of the present invention will be described. FIG. 1 is a perspective view showing an example of the sealing material of the present invention. The sealing material 1 of the present invention comprises a core member 2 made of a flexible material and a coating material 3 made of a polymer blend material. FIG. 2 is a cross-sectional view showing another example of the sealing material of the present invention, in which 4 denotes the polymer blend material of the present invention and other elastic bodies.

The cross-sectional shape of the core member 2 is not particularly limited and includes, for example, a circular shape, an elliptical shape, a semicylindrical shape, a trough shape,
Trapezoids, rectangles, etc. can be mentioned, and FIGS. 2 (a) and 2 (b)
As shown in FIG. 2, the inside of the cross section may be hollow (see FIG. 1) or solid (see FIG. 2 (a)). In the case of the hollow, the polymer blend material of the present invention or other elastic body is placed inside. (See FIG. 2 (b)),
It is also possible to coat the surface of a commercially available packing material with the polymer blend material (see FIG. 2 (c)).

As the flexible material forming the core member 2,
It is not particularly limited, and examples thereof include rubber, resin, polyurethane and the like, and foams thereof, etc., but depending on the application, rubberized cloth, thread, paper, etc. of various metal steel cords can also be used. Further, by using these core members and / or polymer blend materials alone or in combination of two or more kinds, it is possible to obtain a sealing material excellent in handleability and workability (field workability).

In the present invention, the polymer blend material constituting the coating material 3 is mainly composed of a polymer organic material and a low molecular weight material. First, as the high molecular weight organic material, the number average molecular weight is 20,000 or more, particularly 30,000 or more, and particularly 40.
000 or more thermoplastic polymer organic materials are preferable, for example, various thermoplastic elastomers such as styrene type (butadiene styrene type, isoprene styrene type), ester type, amide type, urethane type, etc., and hydrogenation thereof Modified products, styrene-based, ABS-based, olefin-based (ethylene-based, propylene-based, ethylene-propylene-based, ethylene-styrene-based, propylene-styrene-based, etc.), vinyl chloride-based, acrylic ester-based (methyl acrylate-based, etc.), methacryl Acid ester type (methyl methacrylate type, etc.) Carbonate type, acetal type,
Nylon type, halogenated polyether type (chlorinated polyether type, etc.), halogenated olefin type (tetrafluoroethylene type, fluorinated-ethylene chloride type, fluorinated ethylene propylene type, etc.), cellulose type (acetyl cellulose type, ethyl cellulose type) And the like), vinylidene-based, vinyl butyral-based, alkylene oxide-based (propylene oxide-based, etc.) thermoplastic resins, and rubber-modified products of these resins.

As a concrete thermoplastic polymer material, it is particularly preferable to use a material having a portion that easily forms a hard block such as a crystal structure or an agglomerate structure and a soft block such as an amorphous structure together. Specifically, the following are mentioned.

A block copolymer of polyethylene / butylene and an ethylene-styrene random copolymer obtained by hydrogenating a block copolymer of polybutadiene and a butadiene-styrene random copolymer. Block copolymers of polyethylene / butylene and polystyrene, block copolymers of polyethylene / butylene and polyethylene, block copolymers of polyethylene / butylene, polystyrene and polyethylene. Ethylene-propylene rubber, and among them, a block copolymer of polyethylene / butylene and an ethylene-styrene random copolymer is particularly preferable.

These various thermoplastic polymer materials are mainly used alone, but two or more kinds may be blended and used.

On the other hand, as the low molecular weight material, the viscosity at 100 ° C. is not more than 5 × 10 ⁵ centipoise, especially 1 × 1.
Is preferably 0 ⁵ centipoise or less, from the viewpoint of molecular weight, number average molecular weight of the low molecular material 20,
000 or less, especially 10,000 or less, especially 5,000
It is preferably 0 or less. As such a low molecular weight material, a liquid or liquid material at room temperature is usually preferably used. Further, both hydrophilic and hydrophobic low molecular weight materials can be used. The low molecular weight material is not particularly limited, but the following materials are suitable.

Softening agent: A softening agent for various types of rubber or resin such as mineral oil, vegetable oil and synthetic. Examples of mineral oil-based oils include process oils such as aromatic oils, naphthene oils, and paraffin oils. Examples of vegetable oils include castor oil, cottonseed oil, linseed oil, rapeseed oil, soybean oil, palm oil, coconut oil, peanut oil, wood wax, pine oil, olive oil and the like.

Plasticizers: various ester plasticizers such as phthalic acid esters, mixed phthalic acid esters, aliphatic dibasic acid esters, glycol esters, fatty acid esters, phosphoric acid esters, stearic acid esters, epoxy plasticizers, etc. Plasticizers for plastics or phthalates, adipates, sebacates, phosphates,
NBR plasticizers such as polyether and polyester.

Tackifier: Various tackifiers such as coumarone resin, coumarone-indene resin, phenol terpene resin, petroleum hydrocarbon, and rosin derivative (tackifier).

Oligomer: Crown ether, fluorine-containing oligomer, polyisobutylene, xylene resin, chlorinated rubber, polyethylene wax, petroleum resin, rosin ester rubber, polyalkylene glycol diacrylate,
Liquid rubber (polybutadiene, styrene-butadiene rubber, butadiene-acrylonitrile rubber, polychloropolene, etc.), silicone-based oligomers, various oligomers such as poly-α-olefins.

Lubricants: Hydrocarbon lubricants such as paraffin and wax, fatty acid lubricants such as higher fatty acids and oxyfatty acids, fatty acid amide lubricants such as fatty acid amides and alkylenebisfatty acid amides, fatty acid lower alcohol esters, fatty acid polyhydric alcohol esters. , Ester lubricants such as fatty acid polyglycol ester, fatty alcohol,
Various lubricants such as alcohol-based lubricants such as polyhydric alcohols, polyglycols and polyglycerols, metal soaps, mixed lubricants.

In addition, latex, emulsion, liquid crystal, bituminous composition, clay, natural starch, sugar, inorganic silicone oil, phosphazene and the like are also suitable as the low molecular weight material. In addition, animal oil such as cow oil, pig oil, horse oil,
Bird oil or fish oil: honey, fruit juice, or dairy products such as chocolate, yogurt, hydrocarbon-based, halogenated hydrocarbon-based, alcohol-based, phenol-based, ether-based, acetal-based, ketone-based, fatty acid-based, ester-based,
Organic solvents such as nitrogen compounds and sulfur compounds: Or various medicinal ingredients, soil modifiers, fertilizers, petroleum,
Water, aqueous solution, etc. are also used.

These low molecular weight materials may be used alone or in combination of two or more.

In the present invention, in order to obtain a polymer blend material containing a large amount of a low molecular weight material with a large amount of a low molecular weight material and a high molecular weight organic material, the solubility parameter of each of the low molecular weight material and the high molecular weight organic material used. Value δ = (ΔE /
V) ^1/2 (ΔE = molar evaporation energy, V = molar volume)
Difference of 3.0 or less, preferably 2.5 or less,
It is preferable to select both materials. If this difference exceeds 3.0, from the viewpoint of the compatibility of both materials, it is difficult to retain a large amount of low molecular weight materials, which is an obstacle to lowering the elasticity of the obtained polymer blend material, and also causes bleeding of the low molecular weight materials. It is not preferable because it tends to occur.

If necessary, the polymer blend material according to the present invention may further contain the following fillers. That is, clay, diatomaceous earth, carbon black, silica, talc, barium sulfate, calcium carbonate,
Scale-like inorganic fillers such as magnesium carbonate, metal oxides, mica, graphite and aluminum hydroxide, various metal powders, wood chips, glass powders, ceramics powders, granular or powdery solid fillers such as granular or powder polymers, etc. Various natural or artificial short fibers, long fibers (for example, straws, hairs, glass fibers, metal fibers, and other various polymer fibers) can be blended.

Further, it is possible to reduce the weight by blending a hollow filler, for example, an inorganic hollow filler such as a glass balloon or a silica balloon, or an organic hollow filler made of polyvinylidene fluoride or a polyvinylidene fluoride copolymer. It is also possible to mix various foaming agents in order to improve various physical properties such as weight reduction.
It is also possible to mechanically mix the gas at the time of mixing.

The polymer blend material according to the present invention is 25
Tensile adhesion with the object to be sealed at ℃ is 0.02
Kg / cm ² or more, preferably, 0.1 Kg / cm ² or more, the elongation at maximum load of 100% or more, preferably, 2
It is preferably at least 00%. If the adhesive force with the object to be sealed is less than 0.1 kg / cm ² , the sealing material and the object to be sealed are likely to peel off, and sufficient sealing characteristics may not be exhibited. In addition, if the elongation of the sealing material itself at the maximum load is less than 100%, the sealing material may not be able to follow up and may not exhibit sufficient sealing characteristics, especially when vibration or deformation is applied to the sealing part.

The adhesive force means that a polymer blend material is molded into a size of 5 cm × 1.2 cm and a thickness of 1.5 cm, and a test piece (5 cm × 5 cm, 5 cm × 5 cm, etc.) of an object to be sealed such as concrete, foam board or foam concrete. A sample for adhesion test made by sandwiching with 2 sheets and pressing with a load of 100 l · g / cm ² at room temperature 50 mm /
It is calculated and obtained from the value when the polymer blend material is peeled off by pulling at a speed of min.

The elongation at maximum load is measured by a tensile adhesion test of a polymer blend material as a sealing material (JIS A575).
The value measured according to 8).

In order to have such characteristics, the three-dimensional continuous reticulated skeleton structure formed of the polymer organic material that constitutes the polymer blend material has an average diameter of the skeleton of 50 μm.
m or less, preferably 30 μm or less, the average diameter of cells (mesh) is 500 μm or less, preferably 300 μm or less, and the volume fraction of the polymer organic material is [volume of polymer organic material / (polymer organic material Volume + volume of low molecular weight material)]
When defined as × 100 (%), it is desirable that the volume fraction of the polymer organic material be 30% or less, and particularly 25% or less.

The polymer blend material used in the present invention contains a predetermined amount of a high molecular weight organic material and a low molecular weight material and, if necessary, other compounding agents to form a three-dimensional continuous network skeleton structure of the high molecular weight organic material. It can be obtained by mixing under possible mixing conditions. In this case, while having a uniform three-dimensional continuous network skeleton structure of a high molecular weight organic material,
In order to obtain a polymer blend material having a low bleed of low molecular weight materials and satisfying the above-mentioned characteristics, it is preferable to use a high shear type mixer as the mixer, especially, between the fixed wall and the rotating rotor. It can give high shearing force and high shearing rate with fixed wall and rotating part (rotor).
The clearance (clearance) to t (m), the rotational peripheral speed of the rotor as v (m / sec), and the shearing speed V of the rotor
Is defined as V = v / t (sec ⁻¹ ), V ≧ 5.0 × 10 ² (sec ⁻¹ ) and preferably V ≧ 1.0 × 10 ³ (se
c ⁻¹ ) more preferably V ≧ 2.5 × 10 ³ (se
c ⁻¹ ) Most preferably V ≧ 5.0 × 10 ³ (se
It is advantageous to use a high-shear type special mixer satisfying c ⁻¹ ).

The polymer blend material according to the present invention is not particularly limited, such as ordinary bulk, gel, foam, etc., but is in a gel state, in particular, a three-dimensional continuous uniform network made of a thermoplastic polymer material. Those in a gel state having a skeletal structure are particularly effective for the present invention.

The method for coating the core member 2 with the coating material 3 is not particularly limited, and for example, a known polymer tube or the like (core member) may be extruded into a molding machine and a polymer blend material (coating material) die may be used. One or more of them are simultaneously extruded for coating, or a preformed core member is dipped in a polymer blend material in a liquid state for coating. Further, the adhesion between the covering material 3 and the core member 2 is basically performed by using a low molecular weight material and a tackifying material in a polymer blend material, but various adhesives can also be used.

Next, a method of applying the sealing material of the present invention will be described. FIG. 3 is a schematic view showing an example of a method for applying the sealing material of the present invention, and the reference numeral 5 indicates an outer wall material. As a procedure of the construction method, first, a sealing material (one of which has one closed mouth) having a hollow inside of the core member 2 of the present invention is attached to one of the building members 5 in advance (see FIG. )), After the other building member 5 is installed (FIG. 3 (b)), the sealing material is inflated by injecting a fluid such as air to fill the gaps between the building members (FIG. 3).
(C)) etc. are mentioned. Alternatively, it is also possible to fill the sealing material with a fluid in advance and close both openings, and then open and seal after construction. After applying the sealing material of the present invention, a conventional amorphous or preformed sealing material may be filled.

Further, it is preferable that the surface of the polymer blend material is protected in order to exhibit excellent sealing properties before construction, during storage and during transportation.
Although not particularly limited, a plastic film or paper coated with silicone is desirable, and this is removed at the time of construction and sealing is performed.

The present invention will be described more specifically with reference to the following examples.

(Example 1) The materials shown in Table 1 were blended as shown in Table 1 using a high shear type special mixer ("TK Auto Homo Kixer" manufactured by Tokushu Kika Kogyo Co., Ltd.). The mixture was mixed under the mixing conditions shown in (1), and a rubber tube having a diameter of 14 to 16 mm and a length of 300 mm was dipped to obtain a sealing material.

After completion of molding, the obtained sealing material is shown in FIG.
As a sealing material for the outer wall of a house like this, when it is pressed into the gap in the outer wall at the site and filled, it is extremely easy to fill and perform sealing work. It was confirmed to show sealing properties.

The adhesive force of this polymer blend material was 0.5 Kg / cm ² , and the elongation at maximum load was 270%. Also, when a section of this polymer blend material was cut out and confirmed by an optical microscope, a three-dimensional continuous reticulated skeleton structure (average skeleton diameter 15 μm, average cell diameter 25 μm) made of a thermoplastic polymer organic material was formed. Was confirmed.

[Table 1]

[Table 2]

(Example 2) The materials shown in Table 1 were blended as shown in Table 1 using a high-shear type special mixer ("TK Auto Homo Kixer" manufactured by Tokushu Kika Kogyo Co., Ltd.). Mixed under the mixing conditions shown in, diameter 10mm, length 3000mm
A polyurethane foam of No. 1 was dipped to obtain a sealing material.

After the completion of molding, the obtained sealing material was used as a sealing material for the outer wall of the house by in-situ filling in the gaps in the outer wall as shown in FIG. It was confirmed that sealing can be performed by using the above method, and that it exhibits sufficient sealing characteristics without causing cracks for a long period of time.

The adhesive force of this polymer blend material was 0.5 Kg / cm ² , and the elongation at maximum load was 200%. Also, when a section of this polymer blend material was cut out and confirmed by an optical microscope, a three-dimensional continuous reticulated skeleton structure (average skeleton diameter 15 μm, average cell diameter 25 μm) made of a thermoplastic polymer organic material was formed. Was confirmed.

(Example 3) The materials shown in Table 1 were blended as shown in Table 1 using a high-shear type special mixer ("TK Auto Homo Kixer" manufactured by Tokushu Kika Kogyo Co., Ltd.). Mixed under the mixing conditions shown in, diameter 10mm, length 3000mm
A polyurethane foam of No. 1 was dipped to obtain a sealing material.

After the completion of molding, the obtained sealing material was used as a sealing material for the outer wall of the house, and was pushed into the gap between the outer walls as shown in FIG. It was confirmed that sealing can be performed by using the above method, and that it exhibits sufficient sealing characteristics without causing cracks for a long period of time.

The adhesive force of this polymer blend material was 0.5 Kg / cm ² , and the elongation at maximum load was 200%. Also, when a section of this polymer blend material was cut out and confirmed by an optical microscope, a three-dimensional continuous reticulated skeleton structure (average skeleton diameter 15 μm, average cell diameter 25 μm) made of a thermoplastic polymer organic material was formed. Was confirmed.

Example 4 The materials shown in Table 1 were blended as shown in Table 1 using a high-shear type special mixer ("TK Auto Homo Kixer" manufactured by Tokushu Kika Kogyo Co., Ltd.). Mixed under the mixing conditions shown in, diameter 10mm, length 3000mm
A polyurethane foam of No. 1 was dipped to obtain a sealing material.

After the completion of molding, the obtained sealing material was used as a sealing material for the outer wall of the house by in-situ filling in the gaps in the outer wall as shown in FIG. It was confirmed that sealing can be performed by using the above method, and that it exhibits sufficient sealing characteristics without causing cracks for a long period of time.

The adhesive force of this polymer blend material was 0.02 Kg / cm ² , and the elongation at maximum load was 150%. Also, when a section of this polymer blend material was cut out and confirmed by an optical microscope, a three-dimensional continuous reticulated skeleton structure (average skeleton diameter 15 μm, average cell diameter 25 μm) made of a thermoplastic polymer organic material was formed. Was confirmed.

[0053]

As described above, the sealing material of the present invention is excellent in sealing property, handleability, workability and workability, and can be manufactured with high productivity, which is economical. Also provides excellent sealing material, especially
It can be used for sealing exterior walls for houses, indoor / outdoor wall surfaces, water areas, window frames, etc.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a sealing material of the present invention.

FIG. 2 is a cross-sectional view showing another example of the sealing material of the present invention.

FIG. 3 is a schematic view showing an example of a method of applying the sealing material of the present invention.

[Explanation of symbols]

 1: Sealing material 2: Core member 3: Covering material 4: Polymer blend material or other elastic body 5: Outer wall material

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display area C09K 3/10 R

Claims (3)

[Claims] 1. A core member made of a flexible material is coated with a coating material made of a polymer blend material having a three-dimensional continuous reticulated skeleton structure containing a high molecular weight organic material and a low molecular weight material as main components. Sealing material characterized by. 2. The polymer blend material comprises a polymer organic material having a number average molecular weight of 20000 or more and a number average molecular weight of 200.
The sealing material according to claim 1, which is mainly composed of a low molecular weight material of less than 00 and has a solubility parameter difference of 3.0 or less between the high molecular weight organic material and the low molecular weight material. 3. The sealing material according to claim 1, wherein the flexible material is rubber, urethane, or resin alone or in combination of two or more kinds.