JP6024447B2 - Binder composition for Baba cushion material - Google Patents

Description

  The present invention relates to a binder composition for a Baba cushion material for mixing with a Baba cushion material used in a racetrack or the like to impart adhesiveness to the Baba cushion material.

  Currently, there are dirt and turf types of racetracks mainly used in racetracks. However, since dirt is generated when the dirt dries, there is a concern that the visibility may deteriorate during the race, which may cause danger to human horses, and the impact on the surrounding areas of the racetrack and practice field. On the other hand, since the surface of turf is rough during use, there are concerns that it may cause a racehorse failure and that it takes a lot of labor and expense to repair the rough surface.

In order to solve such problems of dirt and turf, there is an artificial dressing field as a dressing field that has been introduced in recent years. Artificial racetracks have the characteristics that the surface is easy to level, the cushioning property is high, and the generation of dust is small.
Artificial Baba is a Baba cushion material with a binder added, and as a Baba cushion material, sand, rubber, resin, etc. are used, and as a binder, oil components, water-insoluble synthetic resin, rubber asphalt, resin asphalt, Wax or the like is used. The Baba cushion material mainly gives cushioning properties, and the binder further improves the cushioning property of the Baba cushion material, imparts adhesiveness to the cushion material, and further plays a role such as sand dust suppression and freezing prevention.

  For example, Patent Document 1 discloses a silicone resin, a urethane resin, a (meth) acrylic resin, an olefin resin, a styrene resin, a vinyl acetate resin, an epoxy resin, and a polyester resin. A Baba cushion material composition in which a water-insoluble synthetic resin selected from a resin and a nylon resin and an oil component are coated or bonded to sand is disclosed, and the water-insoluble synthetic resin used as a binder is a Baba cushion material. Improves stickiness, and the oil component prevents freezing in the cold season and suppresses the generation of dust.

Patent Document 2 discloses a Baba roadbed in which rubber asphalt or resin asphalt is attached to an upper layer portion of a rubber chip layer in which rubber chips are accumulated. Rubber asphalt and resin asphalt used as a binder are: Improves the adhesion between Baba cushion materials.
Furthermore, Patent Document 3 discloses a Baba cushion material composition comprising sand, rubber fiber, polyester fiber, resin component, and wax, and the wax component used as a binder improves durability against weather changes. And prevent aggregation of Baba cushion materials.

  However, the binder used in the above-mentioned Baba cushion material composition and Baba roadbed gives good cushioning properties and appropriate tackiness to the Baba cushion material, and suppresses the generation of dust, but has water resistance. Insufficient, such as in the case of a large amount of rainfall or after repeated rainfall, the functions such as cushioning and adhesiveness cannot be maintained, and the durability is not sufficient. In Baba cushion material compositions, cushioning properties and adhesiveness are closely related, and a binder composition for Baba cushion materials that can impart both functions in a well-balanced manner has not been noted so far.

JP-A-6-15065 JP-A-9-279506 International Publication No. 2008/024523

  The object of the present invention is to solve the above-described problems. Specifically, the Baba cushion material is provided with excellent cushioning properties and good adhesiveness in a well-balanced manner, and excellent water resistance and durability are imparted. It is providing the binder composition for Baba cushion materials which can do.

  As a result of intensive studies to solve the above problems, the present inventors have found that a binder composition containing a specific polyolefin derivative and a specific fatty acid mixture in a specific mass ratio is superior to a Baba cushion material. The present inventors have found that a good balance between cushioning properties and good adhesiveness can be imparted, and excellent water resistance and durability can be imparted.

That is, the present invention contains the following (A) and (B), and the mass ratio [(A) / (B)] of (A) and (B) is 95/5 to 50/50. It is a binder composition.
(A) Polyolefin derivative having a pour point of 40 ° C. or less and a kinematic viscosity at 100 ° C. of 500 to 10,000 mm ² / s (B) Two or more fatty acids having 10 to 24 carbon atoms are mixed, and the cloud point is Fatty acid mixture having a temperature of 15 to 55 ° C. and a pour point of −25 to 50 ° C.

  Since the binder composition for a Baba cushion material of the present invention can impart excellent cushioning properties to the Baba cushion material, it is possible to reduce troubles of human horses. In addition, it can give good cushioning and well-balanced adhesiveness, so it has excellent dust control effect, can reduce accidents during the race and damage to the surrounding area, and is suitable for use. it can. In addition, because it can provide excellent water resistance, it can suppress a decrease in cushioning and stickiness caused by a large amount of rainfall and repeated rain, and can be used for a long period of time. Can be reduced.

  Embodiments of the present invention will be described below. The binder composition for a Baba cushion material of the present invention contains a polyolefin derivative (A) and a fatty acid mixture (B). The polyolefin derivative (A) has an effect of imparting cushioning properties and adhesiveness to the Baba cushion material, and further imparting a dust suppression effect. On the other hand, the fatty acid mixture (B) adjusts the balance between cushioning properties and adhesiveness for the Baba cushioning material, imparts water resistance, and greatly improves durability capable of withstanding a large amount of rainfall and repeated rainfall, Furthermore, it has the effect of preventing solidification at low temperatures. Hereinafter, these components will be described sequentially.

[(A) Polyolefin derivative]
The polyolefin derivative (A) is a polymer obtained by polymerizing an olefin. Examples of olefins include monoolefins such as α-olefins, diolefins, and isoolefins, and olefins having 2 to 16 carbon atoms are preferable. Preferred olefins include ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, 1-decene, 1-undecene, 1-dodecene, 1-tridecene, 1 -Tetradecene, 1-pentadecene, 1-hexadecene, isobutene, butadiene, isoprene and the like. More preferred are ethylene, propylene, 1-butene, 1-hexene, 1-octene, 1-decene, isobutene, butadiene and isoprene, and still more preferred are ethylene, propylene, isobutene, butadiene and isoprene.

  Examples of the polyolefin derivative (A) include ethylene / propylene copolymer, ethylene / vinyl acetate copolymer, isoprene polymer and hydrogenated product thereof, butadiene polymer and hydrogenated product thereof, and α-olefin having 4 to 16 carbon atoms. Examples thereof include polymers obtained by polymerization, polybutene, and the like, preferably ethylene / propylene polymers and polybutene, and more preferably polybutene.

The polyolefin derivative (A) has a pour point of 40 ° C. or lower, in other words, is liquid at 40 ° C. In the present invention, the term “liquid at 40 ° C.” means fluidity at 40 ° C.
In the present invention, the pour point is evaluated at a temperature measured in increments of 1 ° C. according to Japanese Industrial Standard (JIS) K 2269. When the pour point exceeds 40 ° C., the Baba cushion material composition is insufficient in tackiness, may cause slip and dust generation, and may not have an appropriate cushioning property. A preferable pour point is 30 ° C. or lower, and more preferably 20 ° C. or lower. In addition, the lower limit of the pour point is preferably −80 ° C. or higher, and more preferably −60 ° C. or higher.

The polyolefin derivative (A) also needs to have a high viscosity, and those having a kinematic viscosity at 100 ° C. of 500 to 10,000 mm ² / s are used. When the kinematic viscosity at 100 ° C. is less than 500 mm ² / s, since the viscosity is low, cushioning properties and adhesiveness cannot be maintained, and the effect of suppressing slip generation and dust during running may be reduced. In addition, when the kinematic viscosity at 100 ° C. exceeds 10,000 mm ² / s, the viscosity of the binder composition itself becomes too high, making it difficult to handle, and the Baba cushion material composition easily adheres to the horse's hoof. There is a possibility of affecting the running. The kinematic viscosity at 100 ° C. of the polyolefin derivative (A) is preferably 1,000 to 8,000 mm ² / s, more preferably 3,000 to 6,000 mm ² / s. The viscosity of the polyolefin derivative can be measured according to JIS K 2283.

Furthermore, the polyolefin derivative (A) is preferably insoluble in water. When water-soluble ones are used, the binder composition flows out together with the water during rainfall and the like, so that it is difficult to maintain the function of the Baba cushion material composition and the durability may be lowered. In the present invention, “insoluble in water” means that the solubility in water is less than 1% by mass, and “soluble in water” means that the solubility in water is 1% by mass or more.
Examples of the water-insoluble polyolefin derivative include a polymer having a polyolefin site ratio of 50% by mass or more in the polyolefin derivative which is a polymer. The ratio of polyolefin region occupied in the polyolefin derivatives can either be measured by H ¹ -NMR and C ¹³ -NMR. In the present invention, preferably used as a water-insoluble polyolefin derivative is an ethylene / propylene copolymer, an ethylene / vinyl acetate copolymer having an ethylene content of 50% by mass or more, an isoprene polymer and a hydrogenated product thereof, A butadiene polymer, a hydrogenated product thereof, a polymer obtained by polymerizing an α-olefin having 4 to 16 carbon atoms, and a polybutene, and among these, a polymer having a number average molecular weight (Mn) of 500 or more. More preferably, the polymer has a number average molecular weight of 1000 or more. The number average molecular weight of the polyolefin derivative can be calculated by measuring using a gel permeation chromatography (GPC) method and converting to polystyrene.

[(B) Fatty acid mixture]
The fatty acid mixture (B) is a mixture of two or more fatty acids having 10 to 24 carbon atoms, and is not limited to a mixture of two or more fatty acids having 10 to 24 carbon atoms. Fatty acid mixtures derived from natural products containing fatty acids are used. In addition, since fatty acids are insoluble in water and have a carboxyl group that is a polar group in the molecule, they are easily adsorbed to cushion materials with polar surfaces, and are effective against various cushion materials. Can demonstrate.

  The fatty acid is a linear or branched saturated fatty acid having 10 to 24 carbon atoms and an unsaturated fatty acid having 10 to 24 carbon atoms. Preferred are linear or branched saturated fatty acids having 14 to 22 carbon atoms and unsaturated fatty acids having 14 to 22 carbon atoms. More preferably, it is a linear or branched saturated fatty acid having 16 to 20 carbon atoms and an unsaturated fatty acid having 16 to 20 carbon atoms. When a fatty acid having a carbon number of less than 10 is used, the solubility in water increases, and it may flow out during rain, and may corrode metal materials installed around Baba. In the present invention, it is preferable to use a solid fatty acid and a liquid fatty acid that coexist at 20 to 30 ° C. Therefore, a combination of a linear saturated fatty acid and a branched saturated fatty acid, or a linear saturated fatty acid and Combinations with unsaturated fatty acids are preferred.

  As the fatty acid that can be suitably used, in the case of a simple fatty acid, erucic acid, oleic acid, linoleic acid, linolenic acid, palmitooleic acid, behenic acid, stearic acid, palmitic acid, myristic acid, lauric acid, capric acid, isostearic acid , Isopalmitic acid, neodecanoic acid, and the like. Among these, it is desirable to use a mixture of two or more. Preferably, it is a mixture of two or more fatty acids selected from oleic acid, linoleic acid, linolenic acid, palmitooleic acid, behenic acid, stearic acid, palmitic acid, myristic acid, lauric acid, more preferably olein A mixture of two or more fatty acids selected from acids, linoleic acid, stearic acid, and palmitic acid.

  In addition, naturally-occurring fatty acid mixtures that can be suitably used include beef tallow fatty acid, pork tallow fatty acid, rapeseed oil fatty acid, tall oil fatty acid, palm oil fatty acid, palm kernel oil fatty acid, coconut oil fatty acid, rice bran oil fatty acid, sunflower oil fatty acid, Examples include soybean oil fatty acid, safflower oil fatty acid, castor oil fatty acid, fish oil fatty acid, and a part of the above fatty acid or a completely hardened oil fatty acid, and it is desirable to use a mixture of two or more of these. Preferably, beef tallow fatty acid, pork tallow fatty acid, rapeseed oil fatty acid, tall oil fatty acid, palm oil fatty acid, soybean oil fatty acid, and a mixture of two or more natural fatty acids selected from the above fatty acid parts or completely hardened oil fatty acids More preferably, two or more kinds of natural fatty acids selected from beef tallow fatty acid, rapeseed fatty acid, tall oil fatty acid, palm oil fatty acid, soybean oil fatty acid and a part of the above fatty acid or a completely hardened oil fatty acid are mixed.

When the fatty acid mixture (B) is mixed with the polyolefin derivative (A) to form a binder composition, a mixture of solid fatty acid and liquid fatty acid at 20 to 30 ° C. is preferably used. . In addition, 20-30 degreeC prescription | regulation is the temperature which assumed the surface temperature of the Baba cushion material composition after the rain of summer.
In the binder composition, when the fatty acid mixture (B) is composed of only solid fatty acids at 20 to 30 ° C., the function of the polyolefin derivative (A) cannot be sufficiently extracted, and it is difficult to impart appropriate tackiness. Therefore, good cushioning properties may not be obtained. On the other hand, in the binder composition, when the fatty acid mixture (B) is composed only of liquid fatty acids at 20 to 30 ° C., the binder composition may gradually flow out during repeated rainfall, and the Baba cushion material composition It may be inferior in durability and may solidify at low temperatures in winter. Therefore, the fatty acid mixture (B) is preferably in a state where solid fatty acid and liquid fatty acid coexist in the binder composition at 20 to 30 ° C.

  Thus, the cloud point and pour point of the fatty acid mixture (B) used in the present invention are specified within a predetermined range. The cloud point is a measure of the temperature at which the fatty acid mixture (B) in the binder composition becomes a coexistence state of solid fatty acid / liquid fatty acid, and the pour point is the fatty acid mixture (B) in the binder composition. This is a measure of the temperature at which the coexistence state can be maintained.

The cloud point of the fatty acid mixture (B) is 15 to 55 ° C, preferably 20 to 50 ° C, more preferably 25 to 45 ° C.
When the cloud point of the fatty acid mixture (B) is less than 15 ° C., there is a possibility that only the liquid fatty acid is present in the binder composition at 20 to 30 ° C., and the binder composition flows out together with rain, and is durable. May be inferior. Moreover, when the cloud point of a fatty acid mixture (B) exceeds 55 degreeC, there exists a possibility that only a solid fatty acid may exist in a binder composition, the adhesiveness of a binder composition is inferior, and causes a slip etc. There is a fear. The cloud point is a value measured according to JIS K 2269.

The pour point of the fatty acid mixture (B) is −25 to 50 ° C., preferably −10 to 45 ° C., more preferably −5 to 40 ° C.
Since the pour point is a temperature at which the fatty acid mixture (B) loses its fluidity, it does not indicate the temperature at which all the fatty acids constituting the fatty acid mixture (B) become solid at that temperature. It is a measure of the temperature at which fatty acid coexistence can be maintained. When the pour point is lower than −25 ° C., there is a possibility that only the liquid fatty acid is present in the binder composition, and the binder flows out together with rain, which may be inferior in durability. Moreover, when the pour point of a fatty acid mixture (B) exceeds 50 degreeC, in a binder composition, there exists a possibility that only a solid fatty acid may exist, the adhesiveness of a binder composition is inferior, and causes slip etc. There is a risk. The pour point is a value measured in increments of 1 ° C. according to JIS K 2269.

  As a method for preparing the fatty acid mixture (B), a simple fatty acid, a natural fatty acid or a cured product thereof is appropriately mixed by adjusting so that the cloud point is in the range of 15 to 55 ° C. and the pour point is in the range of −25 to 50 ° C. It is preferable to do this.

  In the binder composition for Baba cushion material, the improvement in adhesiveness and the improvement in cushioning properties are closely related. When the tackiness is improved, the cushioning property is also improved. However, if the tackiness is too high, the dressing cushion material composition may adhere to the hoof of the horse, and there is a possibility that the racehorse may be burdened. On the other hand, if the adhesiveness is low, cushioning properties may be difficult to obtain. As described above, it is important to control the adhesiveness appropriately without reducing the cushioning property. In the present invention, the fatty acid mixture (B) plays a role in controlling the balance between the cushioning property and the adhesiveness. Fulfill.

[Binder composition for Baba cushion material]
The binder composition for Baba cushion material of the present invention contains a polyolefin derivative (A) and a fatty acid mixture (B), and a mass ratio of the polyolefin derivative (A) and the fatty acid mixture (B) [(A) / (B )] Is 95/5 to 50/50. When the blending ratio of the polyolefin derivative (A) is high and the blending ratio of the fatty acid mixture (B) is low, the tackiness is increased and the cushioning property is also improved, but the tackiness is too high, and there is a risk that the racehorse may be burdened. There is also. On the contrary, when the blending ratio of the polyolefin derivative (A) is low and the blending ratio of the fatty acid mixture (B) is high, there is a risk that the adhesiveness is insufficient and good cushioning properties cannot be obtained. The preferred blending ratio of the polyolefin derivative (A) and the fatty acid mixture (B) is such that the mass ratio [(A) / (B)] is 90/10 to 55/45, more preferably 85/15 to 60/40. It is. The binder composition for Baba cushion material of the present invention can be prepared by mixing the polyolefin derivative (A) and the fatty acid mixture (B) while heating as necessary.

  The binder composition for Baba cushion material of the present invention is prepared by mixing a polyolefin derivative (A) and a fatty acid mixture (B), and has sufficient cushioning properties, adhesiveness, and dust in the temperature range during use. It is necessary to impart a restraining effect and durability to the Baba cushion material. For this reason, it is preferable that the binder composition after mixing has a cloud point of 5 to 50 ° C, more preferably 10 to 45 ° C, and particularly preferably 15 to 40 ° C. When the cloud point is less than 5 ° C., the binder composition flows out during rain, and the durability may be inferior. On the other hand, if the cloud point exceeds 50 ° C., there is a risk of slipping during running, which may make it difficult to provide appropriate cushioning properties. The cloud point is a value measured according to JIS K 2269.

  The binder composition after mixing preferably has a pour point of −30 to 55 ° C., more preferably −20 to 50 ° C., and particularly preferably −10 to 45 ° C. When the pour point is less than −30 ° C., the binder composition may flow out due to repeated rainfall, which may be inferior in durability. Moreover, when a pour point exceeds 55 degreeC, there exists a possibility that it may become difficult for a binder composition to provide moderate adhesiveness with respect to a Baba cushion material. The pour point is a value measured in increments of 1 ° C. according to JIS K 2269.

  The binder composition for a Baba cushion material of the present invention may appropriately contain various additives such as an antioxidant, an anti-coloring agent, a thickener, and a water repellent as appropriate.

[Baba cushion material composition]
The Baba cushion material composition is obtained by mixing the binder composition for Baba cushion material of the present invention and the Baba cushion material, heating as necessary, and thoroughly mixing with a kneader or the like.

  The ratio of the binder composition for Baba cushion material of the present invention in the Baba cushion material composition varies depending on the type of the raw material of the Baba cushion material, but preferably 1 to 30% by mass, more preferably in the Baba cushion material composition. 3 to 15% by mass.

  In addition, when the Baba cushion material composition is repeatedly used and its cushioning property, adhesiveness, and dust suppression effect are weakened, the binder composition of the present invention is again sprayed on the Baba cushion material composition, etc. The function of the Baba cushion material composition can be revived by mixing with the material.

  The binder composition of the present invention can impart good cushioning properties, adhesiveness, and durability to the Baba cushion material by mixing with various Baba cushion materials. Examples of Baba cushion materials include sand, earth, cloth, non-woven fabric, rubber chips, synthetic resins, tree bark, wood chips, tire scraps, and the like.

Examples of the sand include natural sand such as river sand, mountain sand and sea sand, artificial sand such as crushed sand, sand such as dredged sand, etc. Grain sand, medium grain sand, fine grain sand, ultrafine grain sand and the like can be used. In order to reliably cover the sand particles with the binder composition, the sand is preferably dry sand from which moisture has been removed.
Examples of the soil include black soil, red soil, garden soil, humus soil, peat moss, coconut peat, perlite, and vermiculite.
Examples of the cloth include cotton, linen, acetate, cupra, rayon, polyester, nylon, polyurethane, and fistop. Examples of the nonwoven fabric include aramid fiber, glass fiber, cellulose fiber, nylon fiber, vinylon fiber, polyester fiber, polyolefin fiber, and rayon fiber. Further, fiber scraps such as carpet scraps and tire cord fiber scraps can be used.
Rubber chips include natural rubber, acrylic rubber, nitrile rubber, isoprene rubber, urethane rubber, ethylene propylene rubber, chlorosulfonated polyethylene, epichlorohydrin rubber, chloroprene rubber, silicone rubber, styrene / butadiene rubber, butadiene rubber, fluorine rubber, butyl rubber, etc. Can be used.

As the synthetic resin, for example, a material obtained by reusing the wire covering material is used, and as the resin material, a vinyl chloride resin, a styrene resin, an olefin resin, a urethane resin, or the like can be given.
Examples of tree bark include cedar bark and cypress bark.
Examples of the wood chip include a chip manufactured through a chip screen after cutting wood used in a racetrack or its practice field.
Examples of tire waste include those obtained by pulverizing used tires.

  Next, the present invention will be described in more detail with reference to examples and comparative examples. In addition, the number average molecular weight (Mn), pour point, 100 ° C. kinematic viscosity, and cloud point described in the following table are values measured according to the above-described methods, respectively, and the mass average molecular weight (Mw) in Table 1 is , Measured by gel permeation chromatography (GPC) method and calculated by polystyrene conversion.

<Preparation of Binder Cushion Binder Composition>
(Binder composition 1-8)
The polyolefin derivatives listed in Table 1 and the fatty acid mixtures listed in Table 2 were heated to 80 ° C. and mixed in the combinations listed in Table 3. The prepared binder compositions are summarized in Table 3.

(Binder composition 9)
A polycarbonate urethane resin emulsion “manufactured by Sanyo Kasei Co., Ltd., Permarin UA-300” and dimethyl silicone oil “manufactured by Toray Dow Corning Co., Ltd., SH FLUID 1000cs” were mixed at 50/50 parts by mass, respectively.

(Binder composition 10)
Petroleum hydrocarbon-based paraffin wax “Nippon Seiki, paraffin wax 130 ° F.” was used.

<Preparation of Baba cushion material>
The cushioning material raw material shown below was mix | blended with the composition shown in Table 4, and it was set as the Baba cushioning material.
・ River sand: Drying medium grain sand of 0.5 to 0.25 mm particle size ・ Non-woven fabric: 3 × 3 mm crushed product made of polyester fiber • Cedar bark: crushed product of 5 × 5 mm or less ・ Cable covering material: 5 mm Degree of cut product

  The Baba cushion material prepared in Table 4 and the binder composition and binder compositions 9 and 10 prepared in Table 3 were kneaded at 90 ° C. at the blending ratio shown in Table 5 to obtain a Baba cushion material composition. Prepared. In addition, about the cushion material composition F and G, it was set as only the Baba cushion material 1 or the Baba cushion material 2, and mixing with the binder composition was not performed.

<Evaluation of Baba cushion material composition>
The following evaluation was implemented about Baba cushioning material composition AP prepared in Table 5. The evaluation results are shown in Table 6, Table 7, and Table 8.

<Evaluation test immediately after preparation>
(Evaluation of cushioning properties (SB rebound test))
For Baba cushion material composition A~P, it was tested in accordance with test method specified in the "construction guidelines of outdoor sports facilities" of the Japan Sports Facilities Association outdoor sports facilities Group issued. In this test, the height of the bounce when a steel ball having a diameter of 1 inch is dropped from a height of 1 m is expressed as follows.
SB coefficient of restitution = (bound height (m) / 1 (m)) × 100

  The SB coefficient of restitution becomes an index representing cushioning properties, and the smaller the value of this test, the lower the repulsive force and the more easily absorbs the impact, so that the cushioning property is excellent as a riding ground. Those having an SB restitution coefficient of less than 3.0 can be said to be very good as a Baba cushion material composition.

(Evaluation of adhesiveness)
Baba cushioning material compositions A to P were spread on a metal bat so as to have a thickness of 5 cm. A mass-measured cylindrical weight (JIS B 7609, M2 class, 1.0 kg, bottom diameter 48.0 mm) was placed on the spread Baba cushion material composition and allowed to stand for 1 minute. After leaving still for 1 minute, it pulled up slowly, measured the mass, and quantified the quantity of the Baba cushion material adhering to the bottom face from the mass difference before and behind a test. This test is conducted assuming the amount of Baba cushioning material adhering to the hoof of the horse.If the adhesive strength is too high, a lot of Baba cushioning material adheres to the bottom of the weight and is suitable as a Baba cushioning material. Absent.

<Water resistance test>
Water permeability evaluation: 1 kg of Baba cushion material composition prepared according to the composition shown in Table 5 was charged into a 5 L cylindrical plastic container, and 200 g of tap water was further charged. After adding tap water, the mixture was thoroughly stirred for 5 minutes using a stick. Thereafter, the cushioning material composition was spread uniformly on a sieve having an inner diameter of 400 mm and a mesh size of 300 μm as defined in JIS Z-8801, a 30 kg weight (diameter 380 mm, cylindrical shape) was placed on the top, and drained for 30 minutes. Went. After completion of draining, the Baba cushioning material composition was laid on a metal bat, and left in a dryer preheated to 120 ° C. for 8 hours to be dried. The dried Baba cushion material composition was further subjected to water injection, mixing, and draining steps five times. The process in this test assumes repeated rainfall.

<Evaluation test after water resistance test>
(Evaluation of cushioning properties (SB rebound test))
About the Baba cushion material composition for which the water resistance test was completed, the cushioning property was evaluated in the same manner as the “evaluation of cushioning property (SB repulsion test)” performed in the test immediately after the preparation. This test is a test for evaluating the sustainability (durability) of cushioning in repeated rainfall.

(Evaluation of adhesiveness)
The Baba cushioning material composition for which the water resistance test was completed was evaluated for adhesiveness in the same manner as the “adhesive evaluation” performed in the test immediately after preparation. This test is a test for evaluating the persistence of durability (durability) in repeated rainfall.

<Comprehensive evaluation>
Comprehensive evaluation was performed according to the following criteria.
Overall evaluation: ◎
Baba cushion material composition satisfying all of the following (1) to (3) (1) Cushioning property (immediately after preparation) is less than 3.0, adhesiveness (immediately after preparation) is less than 0.5 g (2) Cushioning property (water resistance) After test)-Cushioning (immediately after preparation) = less than 0.5 (3) Adhesiveness (immediately after preparation)-Adhesiveness (after water resistance test) = 0

Comprehensive evaluation: ○ Baba cushion material composition satisfying the following (1) to (3) except for the comprehensive evaluation ◎ (1) The cushioning property (immediately after preparation) is less than 3.0, and the tackiness (immediately after preparation) is 0. Less than 5 g (2) Cushioning property (after water resistance test) -Cushioning property (immediately after preparation) = 0 to 1.0
(3) Tackiness (immediately after preparation) -tackiness (after water resistance test) = 0 to 0.1

Overall rating: ×
Baba cushion material composition satisfying any of the following (1) to (4) (1) Cushioning property (immediately after preparation) is 3.0 or more (2) Adhesiveness (immediately after preparation) is 0.5 or more (3) Cushioning property (after water resistance test)-Cushioning property (immediately after preparation) = 1.1 or more (4) Tackiness (immediately after preparation)-Adhesive property (after water resistance test) = 1.1 or more

  From said evaluation result, in Baba cushion material composition AE which concerns on Examples 1-5, it turns out that the cushioning property immediately after preparation and adhesiveness are excellent. Moreover, since the cushioning property and adhesiveness after a water-resistant test have almost no change, it turns out that it is a Baba cushion material composition excellent in durability.

On the other hand, in Baba cushion material compositions F to P according to Comparative Examples 1 to 11, the overall evaluation was “x”.
In Comparative Examples 1 and 2 in which no binder composition was blended and only the Baba cushion material was used, the cushioning property was low. In Comparative Example 3 in which only the polyolefin derivative was blended in place of the binder composition of the present invention, not only the adhesive strength was too high, but also the water resistance was low. In Comparative Examples 4 and 5 in which only the fatty acid mixture was blended instead of the binder composition of the present invention, the cushioning property was low, and in Comparative Example 5, the water resistance of the cushioning property was low.

  In Comparative Example 6 using a binder composition containing a polyolefin derivative having a pour point higher than that of the present invention instead of the binder composition of the present invention, the cushioning property was low. In Comparative Example 7 using a binder composition containing a polyolefin derivative having a kinematic viscosity at 100 ° C. lower than that of the present invention instead of the binder composition of the present invention, the cushioning property was low. In place of the binder composition of the present invention, the cushioning property was low in Comparative Example 8 using a binder composition containing a fatty acid mixture having a cloud point and a pour point higher than those of the present invention.

  In Comparative Example 9 in which a binder composition containing a fatty acid mixture having a cloud point lower than that of the present invention was used instead of the binder composition of the present invention, the water resistance of the cushioning property was low. In Comparative Example 10 using the binder composition 9 instead of the binder composition of the present invention, the adhesiveness was high and the water resistance with respect to cushioning properties was low. In Comparative Example 11 using a binder composition containing a paraffin wax instead of the binder composition of the present invention, the cushioning property was low.

Claims (1)

Binder composition for Baba cushion material containing the following (A) and (B), wherein the mass ratio [(A) / (B)] of (A) and (B) is 95/5 to 50/50.
(A) Polyolefin derivative having a pour point of 40 ° C. or less and a kinematic viscosity at 100 ° C. of 500 to 10,000 mm ² / s (B) Two or more fatty acids having 10 to 24 carbon atoms are mixed, and the cloud point is Fatty acid mixture having a temperature of 15 to 55 ° C. and a pour point of −25 to 50 ° C.