KR101674358B1 - Composition for Flooring Material containing Coconut Fiber and Method for Manufacturing the Flooring Material - Google Patents

Abstract

The composition for flooring containing coconut fiber according to the present invention comprises (A) 20 to 60 parts by weight of acrylonitrile, 40 to 80 parts by weight of butadiene, 1 to 3 parts by weight of the first emulsifier, and 4 to 7 parts by weight of acrylic monomer 100 parts by weight of nitrile-butadiene latex; (B) 3 to 6 parts by weight of a vulcanization agent mixed with sulfur, EZ, MZ and a second emulsifier in a weight ratio of 3: 1: 1: 0.1; (C) 2 to 3 parts by weight of zinc oxide; (D) 2 to 5 parts by weight of an antioxidant; And (E) 20 to 40 parts by weight of calcium carbonate.

Description

TECHNICAL FIELD The present invention relates to a composition for flooring containing coconut fiber and a method for manufacturing flooring using the same.

The present invention relates to a composition for flooring. More particularly, the present invention relates to a composition for flooring which is excellent in tensile strength, durability, weather resistance and the like by producing a flooring material using coconut fiber and is free from heavy metals and harmful substances, and a manufacturing method thereof.

Generally, flooring is constructed in order to reduce the impact on the ground, to reduce the fatigue of the person who exercises by giving a certain cushion feeling, and to prevent injuries etc. on the road for children's playground, track of the playground, jogging and bicycle . Such flooring materials are mainly produced by pulverizing PVC, waste tire, rubber or the like into chips, mixing the materials with a certain ratio of the adhesive and the curing agent, and stirring the mixture, followed by compression molding.

According to this conventional method, strength and durability are largely lowered when used for many years because of limitations in elastic absorbing power and restoring force. Accordingly, a technique of using various additives or modifying the structure of the flooring material to compensate it is proposed.

For example, Korean Patent Laid-Open No. 10-2012-0027763 aims to solve the above problems by reinforcing the performance of a urethane binder. On the other hand, Korean Patent Laid-Open Publication No. 10-2013-0128222 discloses a technique for constructing an elastic packaging material on the entire surface of a polyurethane resin, an EPDM (Ethylene Propylene Diene Monomer) chip using a composite material such as a waste tire chip or a reclaimed rubber chip .

However, as in the above-mentioned prior art, the elastic packaging material manufactured by using the composite material is provided with sufficient elasticity on the floor so that the walking feeling of the pedestrian is improved, and the shock is alleviated to prevent the occurrence of safety accidents Conventionally, elastic packaging materials have been harmful to the human body due to release of harmful substances such as volatile organic compounds (VOCs) harmful to human body from recycled materials such as waste tire chips and recycled rubber chips and EPDM chips in view of resource recycling. Especially, There is a problem that the emission amount thereof increases. Further, the conventional elastic flooring materials, which are formed by bonding together composite materials having different properties such as polyurethane resin, EPDM chip, waste tire chip, and recycled rubber chip, are low in adhesiveness with each other and are packed on the floor, And it is difficult to use it.

In order to solve the above-mentioned problems, the present inventor proposes a composition for manufacturing an elastic flooring material by applying environmentally friendly coconut fiber without using a material such as waste rubber or waste tire, and a flooring material using the composition.

It is an object of the present invention to provide a composition for flooring using a more environmentally friendly coconut fiber since no harmful substances are released and a flooring made using the composition.

Another object of the present invention is to provide a composition for a flooring having excellent tensile strength, durability and weather resistance and a flooring made using the same.

The above objects and other intrinsic objects of the present invention can be easily achieved by the present invention described below.

The composition for a floor material containing coconut fiber according to the present invention comprises

(A) 100 parts by weight of an acrylonitrile-butadiene latex comprising 20 to 60 parts by weight of acrylonitrile, 40 to 80 parts by weight of butadiene, 1 to 3 parts by weight of a first emulsifier, and 4 to 7 parts by weight of an acrylic monomer;

(B) 3 to 6 parts by weight of a vulcanization agent mixed with sulfur, EZ, MZ and a second emulsifier in a weight ratio of 3: 1: 1: 0.1;

(C) 2 to 3 parts by weight of zinc oxide;

(D) 2 to 5 parts by weight of an antioxidant; And

(E) 20 to 40 parts by weight of calcium carbonate;

And a control unit.

In the present invention, optionally (F) rhodinic acid may be contained in an amount of 5 parts by weight or less.

In the present invention, the first emulsifier is selected from monoethanolamine (MEA), diethanolamine (DEA), triethanolamine (TEA), diglycolamine (DGA), dichlorohexylamine (DCHA), oleic acid amine salt, It is preferably at least one emulsifier selected from the group consisting of an amine salt of tall oil, an amine salt of succinic acid, a fatty acid, polyoxyethylene glycol fatty acid-ester, polyoxyethylene tridecyl ether, sorbitan oleate and sodium sulfonate.

In the present invention, the second emulsifier is preferably a mixture of one or more selected from the group consisting of methyl alcohol, ethyl alcohol, propyl alcohol, and dimethylpolysiloxane.

The method for producing a flooring material containing coconut fiber according to the present invention comprises

Applying the flooring composition according to the present invention to the coconut fiber;

Compressing the applied coconut fiber;

The method comprising the steps of:

INDUSTRIAL APPLICABILITY The present invention has the effect of providing a composition for flooring which is environment-friendly and has excellent physical properties such as durability, elastic restoring force, abrasion resistance, weather resistance and the like because no harmful substances are released.

The composition for a floor material containing coconut fiber according to the present invention comprises

(A) 100 parts by weight of an acrylonitrile-butadiene latex comprising 20 to 60 parts by weight of acrylonitrile, 40 to 80 parts by weight of butadiene, 1 to 3 parts by weight of a first emulsifier, and 4 to 7 parts by weight of an acrylic monomer;

(B) 3 to 6 parts by weight of a vulcanization agent mixed with sulfur, EZ, MZ and a second emulsifier in a weight ratio of 3: 1: 1: 0.1;

(C) 2 to 3 parts by weight of zinc oxide;

(D) 2 to 5 parts by weight of an antioxidant; And

(E) 20 to 40 parts by weight of calcium carbonate;

And a control unit.

The composition for flooring of the present invention is used to improve the physical properties of coconut fiber by coating the surface of the coconut fiber with a solution mixed with water at a weight ratio of 50:50 or 45:55. This improved coconut fiber is used to produce flooring.

The acrylonitrile-butadiene latex (A) of the present invention is a solid rubber latex which imparts an elastic force to the coconut fiber and serves as a matrix for modifying the surface of the coconut fiber. The latex used here is water-soluble, and it is unnecessary to use an organic compound such as a conventional polyurethane binder, and furthermore, weather resistance is good, and thus it is suitable for use for floor wrapping. In the composition for flooring according to the present invention, 100 parts by weight of the acrylonitrile-butadiene latex (A) is mixed with other components.

The first emulsifier of the present invention may be selected from monoethanolamine (MEA), diethanolamine (DEA), triethanolamine (TEA), diglycolamine (DGA), dichlorohexylamine (DCHA), oleic acid amine salt, fatty acid, polyoxyethylene glycol fatty acid-ester, polyoxyethylene tridecyl ether, sorbitan oleate, and sodium sulfonate may be used as the emulsifying agent.

The acrylic monomer of the present invention can be obtained by copolymerizing at least one monomer selected from the group consisting of methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, isopropyl (meth) acrylate, butyl (meth) (Meth) acrylate, hexyl (meth) acrylate, heptyl (meth) acrylate, octyl (meth) acrylate, isooctyl (Meth) acrylate, undecyl (meth) acrylate, decyl (meth) acrylate, undecyl (meth) acrylate, dodecyl (Meth) acrylate, cyclopentyl (meth) acrylate, cyclohexyl (meth) acrylate and the like.

The acrylonitrile-butadiene latex (A) of the present invention is prepared by mixing 20 to 60 parts by weight of acrylonitrile, 40 to 80 parts by weight of butadiene, 1 to 3 parts by weight of the first emulsifier and 4 to 7 parts by weight of acrylic monomer, The blended latex is applied on the basis of 100 parts by weight and the other components are applied at the respective ratios described below.

The vulcanization-treating agent (B) of the present invention is an organic vulcanization accelerator, which serves to shorten the vulcanization time by increasing the vulcanization rate and to improve the quality while lowering the vulcanization temperature. The organic vulcanization accelerator to be used in the present invention is a mixture of Zn-MBT (MZ) containing thiazole MBT (2-Mercapto benzo thiazole) and zinc dimetyl dithiocarbamate (ZnEDC) dithio carbamate EZ) is used in combination with the second emulsifier.

As the second emulsifier to be applied to the vulcanization agent (B) of the present invention, at least one selected from a lipophilic surfactant, a hydrophilic emulsion stabilizer and a lipophilic emulsion stabilizer may be used. The second emulsifier may be a mixture of one or more selected from the group consisting of alcohols (such as methyl alcohol, ethyl alcohol and propyl alcohol) and dimethylpolysiloxane.

The composition ratio of the vulcanizing agent (B) of the present invention is such that sulfur, EZ, MZ, and the second emulsifier have a weight ratio of 3: 1: 1: 0.1.

In the present invention, the vulcanization agent (B) is used in an amount of 3 to 6 parts by weight based on 100 parts by weight of the acrylonitrile-butadiene latex (A).

The zinc oxide (C) of the present invention serves as a vulcanization accelerator, and is used in the form of a light white powder. It is an amphoteric oxide that has little melting property in water but also dissolves in dilute acid and dark alkali. In the present invention, zinc oxide (C) is used in an amount of 2 to 3 parts by weight based on 100 parts by weight of the acrylonitrile-butadiene latex (A).

In the present invention, as the antioxidant (D), aromatic amines, hydroquinone, amino acids and the like can be used. Specific examples thereof include N- (1,3-dimethylbutyl) -N'-phenyl-p-phenylenediamine (6PPD); 2-mercaptobenzimidazole compounds; 2-benzimidazole thiol; Dialkylated diphenylamine; Octylated diphenylamine; Nickel dibutyldithiocarbamate; N-isopropyl-N'-phenyl-p-phenylenediamine; 4'-diphenyl-isopropyl-dianiline; 2,2'-methylenebis (6-tert-butyl-4-methylphenol); And paraffin wax may be applied. In the present invention, the antioxidant (D) is used in an amount of 2 to 5 parts by weight based on 100 parts by weight of the acrylonitrile-butadiene latex (A).

Calcium carbonate (E) is obtained by pulverizing limestone to make powder and sieving it, or by dividing the particles by size or specific gravity using the difference in velocity when solid particles free-precipitate in air. It is also produced by filtering, drying and finely grinding sediments formed by blowing carbon dioxide into lime oil. In the present invention, calcium carbonate (E) is compounded as a reinforcing agent. In the present invention, calcium carbonate (E) is used in an amount of 20 to 40 parts by weight per 100 parts by weight of the acronitrile-butadiene latex (A).

The present invention may optionally contain rhodinic acid (F). The rhodinic acid of the present invention is one of the substances extracted from the natural world, and is one of the components used as an additive for foods and preservatives, as natural products. The molecular weight of Lodi acid is 170.25, molecular formula is a linear _{(CH 3) 2 C = CHCH} 2 CH 2 CH (CH 3) CH 2 CO 2 H. In the present invention, it is judged that rhodonic acid further imparts environmental friendliness to the flooring composition. In other words, it is considered that rhodic acid has the effect of lowering VOC emissions from flooring materials. In the present invention, the rhodinic acid (F) is used in an amount of 0 to 5 parts by weight based on 100 parts by weight of the acrylonitrile-butadiene latex (A).

The composition for flooring comprising the above components is mixed with water and sprayed on the surface of the coconut fiber. At this time, 45 to 50% by weight of the composition for flooring and 50 to 55% by weight of water are mixed and used.

Example

Example  1 to 5

50 parts by weight of acrylonitrile, 40 parts by weight of butadiene, 3 parts by weight of monoethanolamine (MEA) purchased from JA Chem Co., Ltd. as a first emulsifier, and 7 parts by weight of methyl (meth) acrylate monomer as an acrylic monomer, (100 parts by weight) of acrylonitrile-butadiene latex (A) was prepared. Based on this, other compositions were mixed as shown in Table 1 below to prepare compositions for flooring according to Examples 1 to 5. Rhodic acid (F) was used only in Example 5, and a rhodinic acid solid (Sigma-Aldrich, product number 364428) was added along with the other ingredients.

Coconut fibers were prepared to apply the composition for flooring prepared in Examples 1 to 5 to coconut fibers. The prepared coconut fiber was discharged into a nozzle one by one while the two strands were woven together to form a roll. The roll was put into a dryer and heat-treated at 120 to 200 degrees for 30 minutes. The heat-treated coconut fiber rolls were cut at regular intervals into a rotating drum rotating in the opposite direction of the weaving direction. High pressure air was injected into the spinning tub to break the cut fibers. The disintegrated coconut fiber was transferred on a conveyor belt while spraying nozzles were installed on the top of the conveyor belt to dilute the composition for flooring prepared in Examples 1 to 5 to a weight ratio of 1: To the surface of the coconut fiber to apply the composition for flooring according to Examples 1 to 5 diluted with water to the surface of the coconut fiber.

The prepared coconut fiber was put between two pressure rolls to prepare five coconut mats in the shape of a plate having a certain size. Five specimens were prepared for various tests on the mat with dimensions of 100 x 200 x 10 mm in width, length, and thickness.

With the test specimens manufactured, the following test items were evaluated by the Korea Institute of Construction & Living Environment Test.

(1) Tensile strength (length): KS K 0743: 2009 C.R.E, (unit: N) [(20.0 ± 2.0)

(2) Tensile elongation (length): KS K 0743: 2009 C.R.E, (%) [(20.0 ± 2.0)

(3) Sliding resistance (wet): KS F 2375: 2001 (unit: BPN)

(4) Elimination of hazardous substances: National Security Notice No. 2015-143 (Dec. 24, 201) (Unit: mg / kg)

(5) Accelerated exposure test: GR M 6004: 2008 (gray scale after 250 hours exposure to xenon lamp), (unit: grade) [(25.0 ± 2.0)

(6) Dimensional change ratio: KS I 3403: 2014 (unit:%) (70.0 ± 1) ° C, 48 h

(7) Limit Height: Safety Certification Standards Annex 2 (Children's Playground) [Ministry of Commerce, Industry and Energy notification 2015-0107 (2015. 06.04)]

The results of evaluating the properties of Examples 1 to 5 according to the above test items are shown in Tables 2 and 3 below.

As can be seen from the above Tables 1 and 2, the flooring material prepared by applying the composition for flooring according to the present invention to coconut fiber is environmentally friendly and satisfies various required physical properties. Therefore, Or a rubber or a urethane mat to be applied to a construction work or the like.

It should be noted that the description of the invention described above is merely illustrative of the present invention in order to facilitate understanding of the present invention, and is not intended to define the scope of the present invention. It is intended that the scope of the invention be defined by the claims appended hereto, and that all such modifications and variations are intended to be included within the scope of the present invention.

Claims (5)

(A) 100 parts by weight of an acrylonitrile-butadiene latex comprising 20 to 60 parts by weight of acrylonitrile, 40 to 80 parts by weight of butadiene, 1 to 3 parts by weight of a first emulsifier, and 4 to 7 parts by weight of an acrylic monomer;
(B) 3 to 6 parts by weight of a vulcanization agent mixed with sulfur, EZ, MZ and a second emulsifier in a weight ratio of 3: 1: 1: 0.1;
(C) 2 to 3 parts by weight of zinc oxide;
(D) 2 to 5 parts by weight of an antioxidant; And
(E) 20 to 40 parts by weight of calcium carbonate;
, ≪ / RTI >
The first emulsifier may be selected from monoethanolamine (MEA), diethanolamine (DEA), triethanolamine (TEA), diglycolamine (DGA), dichlorohexylamine (DCHA), oleic acid amine salt, Wherein the emulsifier is at least one emulsifier selected from the group consisting of amine salts, succinic acid amine salts, fatty acids, polyoxyethylene glycol fatty acid-ester, polyoxyethylene tridecyl ether, sorbitan oleate, and sodium sulfonate. The flooring composition according to claim 1, further comprising (F) rhodinic acid in an amount of 5 parts by weight or less. delete The flooring composition according to claim 1 or 2, wherein the second emulsifier is one or a mixture of at least one member selected from the group consisting of methyl alcohol, ethyl alcohol, propyl alcohol, and dimethylpolysiloxane. Applying the composition for flooring according to claim 1 or 2 to coconut fiber;
Compressing the applied coconut fiber;
≪ RTI ID = 0.0 > 1. ≪ / RTI >