JPH0952270A - Glass packing material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate static electricity by extrusion molding composition containing thermoplastic elastomer, soft vinyl chloride resin composition and nonionic water absorptive resin. SOLUTION: The glass packing material 1 comprises composition containing 100 pts.wt. of thermoplastic elastomer and (or) soft vinyl chloride resin composition and 7 to 25 pts.wt. of nonionic water absorptive resin. The nonionic resin is a component for imparting water absorption properties to the material 1 and antistatic properties. When the using amount of the nonionic resin becomes less than 7 pts.wt., the water absorption properties of the material 1 become low, and hence the antistatic properties also becomes low. On the other hand, when it exceeds 25 pts.wt., the water absorption rate becomes excessively high, and when it absorbs the water of large quantity, the surface becomes sticky or is deformed.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a glass packing material having water absorption and antistatic properties.

[0002]

2. Description of the Related Art When a glass plate is attached to a window frame, a door, etc., a glass packing material is used to firmly fix the glass plate and the frame and to improve the airtightness.

The glass packing material is usually manufactured from a soft vinyl chloride resin composition containing a vinyl chloride resin and a plasticizer.

[0004]

The glass packing material produced from the soft vinyl chloride resin composition as described above is hydrophobic, and, for example, water droplets condensed on the glass plate flow down and accumulate at the bottom of the frame, and When it gets wet, stains on building members, corrosion, and mold formation on interior materials occur, which causes problems such as being unfavorable for hygiene.

Further, since the glass packing material is inferior in antistatic property, there is a problem that static electricity is generated.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the problem of the case where the glass packing material conventionally used as described above is used, and is made of a thermoplastic elastomer and / or a soft chloride. A glass packing material (claim 1) formed by extruding a composition comprising 100 parts (parts by weight, the same applies hereinafter) of a vinyl resin composition and 7 to 25 parts of a nonionic water absorbent resin, and the thermoplastic elastomer is polyester. At least one of a thermoplastic thermoplastic elastomer, an olefinic thermoplastic elastomer, a styrene thermoplastic elastomer, and a vinyl chloride thermoplastic elastomer, wherein the soft vinyl chloride resin composition comprises 100 parts of a vinyl chloride resin and a plasticizer. The glass packing material according to claim 1, which is a composition comprising 40 to 60 parts ( Motomeko 2) on.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The glass packing material of the present invention comprises:
It is composed of a composition comprising a thermoplastic elastomer and / or a soft vinyl chloride resin composition and a nonionic water absorbent resin.

The thermoplastic elastomer and / or the soft vinyl chloride resin composition itself has a rubber hardness of 40 to 80, preferably 50 to 70. Because it has a certain range of softness,
When it is used as a glass packing material, it adheres to the glass to block the outside air, and at the same time it absorbs condensed water droplets due to the water-absorbent resin kneading composition, and when the inside and outside become dry. Automatically discharges (drains) water.

Further, it is possible to repeat the water absorption and the water discharge.

Further, since the thermoplastic elastomer and / or the soft vinyl chloride resin composition is a composition having thermoplasticity, an extrusion molding method can be used to form a product having any shape if the product has the same sectional shape. can do.

Specific examples of the above-mentioned thermoplastic elastomer include, for example, polyester thermoplastic elastomer (TPEE), vinyl chloride thermoplastic elastomer (TPVC) and olefin thermoplastic elastomer (T
PO), styrene thermoplastic elastomer (SBC),
Examples thereof include polyamide-based thermoplastic elastomer (TPAE) and urethane-based thermoplastic elastomer (TPU).

The thermoplastic polyester-based elastomer is an aromatic polyester having a high melting point and a high crystallinity in the hard segment, such as polybutylene terephthalate (PB).
T) and polyethylene terephthalate (PET),
It is a multi-block polymer in which an amorphous polyether such as polytetramethylene ether glycol (PTMG), polyoxyethylene glycol (PEG) or an aliphatic polyester is used in the soft segment.

Among the thermoplastic elastomers, the polyester-based thermoplastic elastomer can be used in a wide temperature range from high temperature to low temperature, has large load resistance and flex fatigue resistance, and is excellent in oil resistance and chemical resistance. It also has excellent moldability. Therefore, it is suitable for manufacturing glass packing materials for automobiles, industrial machines, and machine tools.

The above-mentioned thermoplastic vinyl chloride elastomer can be molded at a low temperature and has a plasticizer (DOP, DOA, soybean oil, etc.) like a soft vinyl chloride resin composition.
Since it is not softened by the addition of rubber, rubber components (EPOM), etc. are used in the soft segment, so there is no separation and evaporation of the plasticizer, and there is no shrinkage or surface cracking of the product. Suitable for manufacturing glass packing materials such as greenhouses used.

Further, the olefin-based thermoplastic elastomer uses polyolefin such as polypropylene or polyethylene for the hard segment and EPDM for the soft segment.

The olefinic thermoplastic elastomer has a wide operating temperature range of about -60 ° C to 150 ° C and has good cold resistance, has no double bond in the main chain, is excellent in heat resistance and weather resistance, and has a melt-viscosity temperature-sensitive property. It is suitable for manufacturing glass packing materials for aquarium tanks and civil engineering materials in cold regions because of its characteristics such as low property.

The polyamide-based thermoplastic elastomer is typically a block copolymer in which nylon is a hard segment and soft polyester or polyol (PTMG or polyoxypropylene glycol (PPG)) is a soft segment.

The polyamide-based thermoplastic elastomer has improved characteristics such as moldability, heat resistance, chemical resistance, and abrasion resistance of nylon resin, and is further improved in flexibility, impact resistance, low temperature characteristics, and the like. It is a thing.

The polyamide-based thermoplastic elastomer (TPAE) is a urethane-based thermoplastic elastomer (T
PU) and polyester thermoplastic elastomer (TPE)
Compared to E) and the like, it has a lighter specific gravity and better moldability, is stronger against gasoline and aromatic oils, but has water resistance, strong acid resistance and alkali resistance comparable to TPU, and is not as good as TPEE. Therefore, it is suitable for manufacturing glass packing materials for fitting jigs such as gasoline tanks and gasoline hoses.

The urethane-based thermoplastic elastomer is
It has characteristics such as flexibility and impact resilience, excellent abrasion resistance, high mechanical strength, good oil resistance and gasoline resistance, and excellent low temperature characteristics. Suitable for the production of packing material

Further, it has good weather resistance and ozone resistance,
Since it has the advantages of great sound deadening and anti-vibration effects, good thermal stability during molding, reusability, and compliance with the Food Sanitation Law, it requires sound deadening and anti-vibration effects. It also has an excellent effect as a floor material packing material.

The ratio of the vinyl chloride resin to the plasticizer in the soft vinyl chloride resin composition cannot be unconditionally specified because it varies depending on the type of the resin and the type of the plasticizer, but usually 100 parts of the vinyl chloride resin. Against plasticizer 4
It is about 0 to 60 parts.

The nonionic water-absorbent resin is a component that imparts water absorbability and antistatic properties to the glass packing material of the present invention.

As a specific example of the nonionic water-absorbent resin, for example, polyethylene oxide (PEO) having thermoplasticity is cross-linked so that the MI at 190 ° C. and 2160 g is from 1 to 5 Sumitomo Seiki Made by Kaika Co., Ltd.

[0025]

[Outside 1]

Manufactured by Meisei Chemical Industry Co., Ltd.

[0027]

[Outside 2]

And the like.

The amount of the nonionic water-absorbent resin used is the same as that of the thermoplastic elastomer and the soft vinyl chloride resin composition 100.
The amount is 7 to 25 parts, preferably 10 to 20 parts, and further 12 to 18 parts. If the amount used is less than 7 parts, the water-absorbing property of the glass packing material produced will be low, and therefore the antistatic property will also be low, while if it exceeds 25 parts, the water absorption will be too high and a large amount of water will be absorbed. If it does, the surface may become sticky or deform.

When a polyethylene oxide-modified resin is used as the nonionic water-absorbent resin, it is uniformly mixed and compatible with the thermoplastic elastomer and / or the soft vinyl chloride resin composition. As a result, a composition comprising a thermoplastic elastomer and / or a soft vinyl chloride resin composition and a water absorbent resin can be easily produced, and a uniform composition can be obtained with a small heat history. In the case of extrusion molding, it can be commercialized with a general extrusion molding machine, and the extruded glass packing material can have a water absorption rate of up to approximately 50% (weight ratio), and water discharge (drainage) ( After being steamed, a good quality glass packing material with the function of repeatedly absorbing and discharging water (drainage) can be obtained.

When a so-called superabsorbent resin is used instead of the nonionic water-absorbent resin, the superabsorbent resin is not compatible with the thermoplastic elastomer and / or the soft vinyl chloride resin composition, so that it is dispersed uniformly. However, in this case, it cannot be easily mixed like nonionic water-absorbent resin, separation / localization of superabsorbent resin is likely to occur, and detachment from the base resin is also likely to occur. Also, since the mixing time becomes long, it easily deteriorates,
Moreover, the surface becomes jelly-like when absorbing water, and only a glass packing material of inferior quality that is not suitable for repeated absorption and discharge of water over a long period of time can be obtained.

The thermoplastic elastomer and / or the soft vinyl chloride resin composition used in the present invention and the compound composition obtained by kneading the nonionic water-absorbing resin are added to the compound, if necessary, with a colorant, an antioxidant and an antifungal agent. Agents, germicides, etc. may be added.

The method for producing the composition containing the nonionic water-absorbing resin is not particularly limited. For example, a thermoplastic elastomer and / or a soft vinyl chloride resin composition and a special compound prepared by kneading the nonionic water-absorbing resin are kneaded. A general method is to supply a resin to an extruder and, if necessary, add additives used to form a molten composition.

The glass packing material of the present invention is manufactured by continuously extruding the above composition.

A single-screw extruder is most suitable as the extruder used for the extrusion molding. The conditions for extrusion are:
For example, when a polyester thermoplastic elastomer is used as the base material, the molding temperature is 170 to 2 on the hopper side.
If the soft vinyl chloride resin composition is used at a temperature of 20 ° C., the middle portion, the tip portion, and the die temperature of 10 to 20 ° C. higher than the hopper side temperature, the hopper side 15
Conditions such as 0 ° C, the middle portion, the tip portion, and the die are 155 to 170 ° C.

The shape of the molded product extruded under the above-mentioned conditions is not particularly limited, and may be any shape as long as it has a cross-sectional shape used as a glass packing material.

FIG. 1 shows one specific example of the cross-sectional shape.
The one having an irregular cross-sectional shape as described in (1 in FIG. 1 indicates a glass packing material).

The glass packing material of the present invention is extruded,
In particular, since it is manufactured by profile extrusion molding, an extrusion molded product of any length can be easily manufactured.

The glass packing material thus produced has a rubber hardness of 40 to 80, a water absorption rate of about 20 to 70% when immersed in water, preferably 40 to 50% (weight ratio), and room temperature. About 90 to 1 of total water absorption when left for 24 hours
It can release water of 00% and repeat water absorption and water discharge. Further, since it has antistatic properties, it is effective in preventing static electricity.

The antistatic property, when measured with a surface resistivity meter, shows that the surface resistance value of the soft vinyl chloride resin composition alone is about 10 ¹⁴ Ω when the soft vinyl chloride resin composition is 100 parts. By kneading 10 parts of "Aqua Coke", the surface resistance value becomes about 10 ¹⁰ Ω. This performance is maintained even after a long-term durability test.

The glass packing material of the present invention has weather resistance equivalent to that of conventional products.

[0042]

EXAMPLES Next, the glass packing material of the present invention will be described in more detail based on experimental examples (examples and comparative examples), but the present invention is not limited to these experimental examples.

Experimental Example 1 60 parts of a plasticizer (DOP manufactured by Daihachi Chemical Industry Co., Ltd.) was added to 100 parts of vinyl chloride resin (vinyl chloride manufactured by Mitsui Toatsu Chemicals, Inc., average degree of polymerization: 800). A soft vinyl chloride resin composition (I) was produced.

Obtained soft vinyl chloride resin composition (I)
100 parts of nonionic water absorbent resin (Aqua Coke manufactured by Sumitomo Seika Co., Ltd. (crosslinked with thermoplastic polyethylene oxide, general physical properties of Aqua Coke appearance:
White powder (3.5M pass), Water absorption capacity: Pure water 20-40
Double, physiological saline 20-40 times, artificial seawater 20-35 times,
MI: 1 to 5 (190 ° C., 2160 g), flow starting point 7
0 ~ 120 ℃ (Flow tester, 1mmφ × 1mmL,
50 kg / cm ² ), decomposition temperature: about 170 ° C. (in air), about 300 ° C. (in nitrogen atmosphere)))
Parts, 5 parts, 7 parts, 10 parts, 15 parts, 20 parts, 25 parts, 3 parts
A composition was prepared with 0 parts added.

Further, instead of the nonionic water-absorbent resin, a starch-based highly water-absorbent resin (Sunfresh ST-100 (manufactured by Sanyo Chemical Industry Co., Ltd.) (water absorption capacity: pure water of about 1000)
10 times, 20 parts, and 30 parts each and a composition and an acrylic super absorbent resin (manufactured by Sanyo Kasei Co., Ltd., Sunfresh ST-500D (water absorption capacity: about 400 times pure water)) A composition was prepared by kneading 10 parts, 20 parts, and 30 parts, respectively.

An extruding machine (55 m / m extruding machine manufactured by Ikegu Iron Works Co., Ltd.) was attached to the composition obtained by kneading the various water-absorbent resins, and a die having a shape as shown in FIG. 1 was attached to the extruding port. Tatami, temperature condition: Hopper side 150 ° C, middle part 155
To 160 ° C., tip 155 ° C., die 160 ° C.) and extruded a profile extruded product having the shape of FIG. 1 and running it in water at 18 ° C. for 5 m to solidify it. In the case of the kneaded composition, a normal extruded product could be extruded, but the composition of the kneaded starch superabsorbent resin and the composition of the acrylic superabsorbent resin were kneaded. In the meantime, due to poor dispersion, there is a yellowish granular dispersion, which absorbs cooling water to form a jelly-like surface, which makes it possible to manufacture a normal profile extruded product. There wasn't.

Experimental Example 2 Using the composition produced in Experimental Example 1, as a sample for measuring water absorption rate and water discharge rate, a press-molded product of 2 m / m × 33 m / m × 75 m / m (kneading at 150 ° C. for 10 minutes 180 ° C
(Press-molded at 200 kg / cm ² for 50 seconds) was manufactured. This is because in the profile extrusion molding method, a molded product could not be produced from the composition in which the starch superabsorbent resin and the acrylic superabsorbent resin were kneaded.

Using the obtained molded article, the water absorption rate and the water discharge rate were repeatedly measured by the following methods. The results are shown in Table 1.

When a starch-based superabsorbent resin (Sunfresh ST-100) and an acrylic-based superabsorbent resin (Sunfresh ST-500D) are used as the water-absorbent resin, it will be As a jelly-like layer is formed on the surface due to water absorption, a large amount is dropped off when the surface water is wiped off, the weight cannot be measured, and it is not in a form that can be used as a normal glass packing material. Therefore, the test was stopped.

(Repeated water absorption rate and water discharge rate) After the initial weight of the press-formed product was measured, the press-molded product was left standing in water for 24 hours and then taken out, the surface water droplets were wiped off, the weight was measured, and the ratio of the increased weight ( The water absorption rate) was determined.

The press-molded product, the weight of which was measured after absorbing water, was left in the room for 24 hours (standing in a standing state), the weight was measured, and the weight decreased from the weight after absorbing water was calculated. It was divided by the initial weight of the product to obtain the ratio of the weight of water discharged (water discharge rate).

After that, the weight change was measured every 24 hours in the same manner as above, and the repeated water absorption rate and water discharge rate were obtained.

[0053]

[Table 1]

From Table 1, it is seen that when the nonionic water-absorbing resin (Aqua Coke) is not added, the water is hardly absorbed. When the addition amount is 5 parts, the water absorption rate is low, and the addition amount is 7 parts.
It can be seen that the water absorption rate increases as the number increases to 0 parts, 15 parts, 20 parts, 25 parts, and 30 parts. Addition amount is 1
If more than 5 parts, the water absorption rate after the second time will decrease,
After this, it can be seen that a relatively stable water absorption rate is maintained. Also, it can be seen that the initial water discharge rate is low, but thereafter shows a water discharge rate similar to the water absorption rate.

From the above results, it is unsuitable to use the highly water-absorbent resin for the glass packing material having water absorbability.
It can be seen that the nonionic water absorbent resin is excellent. Further, it is understood that the addition amount of the nonionic water-absorbent resin is preferably 10 to 20 parts, more preferably 12 to 18 parts.

Experimental Example 3 A cross section similar to that shown in FIG. 1 prepared in Experimental Example 1 using a PVC compound prepared by kneading 100 parts of a soft vinyl chloride resin composition (I) with 15 parts of a water-absorbent resin (aqua coke). Shaped glass packing material for sash (thickness 1.2
3 mm) cut into 10 cm length (surface area 6
9 cm ² ) was used, and the water absorption rate and water discharge rate as well as the water absorption weight and the water discharge weight were measured repeatedly in the same manner as in Experimental Example 2. Table 2 shows the results. In addition, the weight when absorbing water and the weight when discharging water are shown in FIG.

The initial weight of the glass packing material for sashes having a length of 10 cm was 4.66 g, and the condition of the room at this time was room temperature of 21 ° C. and humidity of 83%. The rubber hardness at this time was 65.

[0058]

[Table 2]

From the results of the water absorption rate and the water discharge rate in Table 2 and FIG. 2, it is understood that the glass packing material of the present invention exhibits stable performance even by repeated water absorption and water discharge.

[0060]

EFFECTS OF THE INVENTION By using the glass packing material of the present invention, water that has condensed on the glass plate and has flowed down accumulates in the lower part of the frame, the surroundings are wet, dirt on building members, corrosion, and mold on interior materials occur. Problems such as unfavorable hygiene are improved. Since this glass packing material has an antistatic property, the problem of static electricity generation is improved.

[Brief description of drawings]

FIG. 1 is an explanatory cross-sectional view of one embodiment of a profile extrusion-molded glass packing material of the present invention.

FIG. 2 is a graph showing the weight change during repeated water absorption and water discharge for the profile-extruded glass packing material of the present invention (made of a composition comprising 100 parts of a soft vinyl chloride resin composition and 15 parts of Aquacork). is there.

[Explanation of symbols]

 1 glass packing material

Claims (2)

[Claims] 1. A thermoplastic elastomer and / or
A glass packing material obtained by extruding a composition comprising 100 parts by weight of a soft vinyl chloride resin composition and 7 to 25 parts by weight of a nonionic water absorbent resin. 2. The soft vinyl chloride resin composition, wherein the thermoplastic elastomer is at least one of a polyester thermoplastic elastomer, an olefin thermoplastic elastomer, a styrene thermoplastic elastomer, and a vinyl chloride thermoplastic elastomer. The glass packing material according to claim 1, which is a composition comprising 100 parts by weight of a vinyl chloride resin and 40 to 60 parts by weight of a plasticizer.