Latex Composition

Abstract

Provided are: a chlorosulfonated polyethylene latex having excellent film forming properties; and a molded product (e.g., thin-film article) produced therefrom having excellent tensile strength.

Description

[Technical field]

[0001] The present disclosure relates to latex compositions and the like, and more particularly to chlorosulfonated polyethylene latex compositions and the like. The contents of all documents described in this specification are incorporated herein by reference. [Background technology]

[0002] Chlorosulfonated polyethylene, which is produced by chlorinating and chlorosulfonating polyethylene, is excellent in weather resistance, ozone resistance, flame resistance, oil resistance, mechanical strength, color brightness, etc., and is used in industrial parts such as automobile hoses, gas hoses, industrial hoses, electric wire coatings, coated fabrics, packings, gaskets, rolls and linings, rubber boats, life jackets, window breakers, escalator handrails, adhesives, outdoor coatings, rubber gloves, etc.

[0003] When chlorosulfonated polyethylene is used for the above-mentioned purposes, for example, various additives are mixed with the chlorosulfonated polyethylene using a kneader, and then an article is manufactured by extrusion molding or press molding. More specifically, for example, in Example 1 of Patent Document 1, a tensile strength of 246 kg / cm 2 It is described that a chlorosulfonated polyethylene composition having a compressive strength of (≈24 MPa) was produced.

[0004] Extrusion molding and press molding are known as common molding methods for polymers containing chlorosulfonated polyethylene. However, when manufacturing thin-film articles such as the above-mentioned outdoor coatings and rubber gloves, extrusion molding and press molding may not be suitable due to the complexity of the shape of the molded article and the working environment. In such cases, thin-film articles and the like can be manufactured by thinly applying and drying a latex in which fine particles of chlorosulfonated polyethylene are dispersed in an aqueous medium. For example, Patent Document 2 describes a chlorosulfonated polyethylene latex manufactured using a specific emulsifier. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 3-74451 [Patent Document 2] International Publication No. 2012 / 141020 Summary of the Invention [Problem to be solved by the invention]

[0006] The present inventors have investigated a method for producing a thin film article by thinly applying and drying chlorosulfonated polyethylene latex, and have found problems in that it is difficult to obtain a uniform thin film due to cracks occurring in the thin film during the drying process of chlorosulfonated polyethylene latex, and that the strength of the produced thin film article is lower than that of original chlorosulfonated polyethylene. Therefore, the present inventors have conducted further investigations with the aim of providing chlorosulfonated polyethylene latex with excellent film-forming properties and a thin film article produced therefrom with excellent tensile strength. [Means for solving the problem]

[0007] As a result of further investigation, it was found that blending a vulcanization accelerator and a glycol ether into chlorosulfonated polyethylene latex suppresses cracks in the thin film that occur during the drying process of chlorosulfonated polyethylene latex, improving film formability, and that the molded product thus manufactured has a tensile strength that is far greater than that of the original chlorosulfonated polyethylene (for example, 24 MPa described in Example 1 of Patent Document 1).

[0008] The present disclosure includes, for example, the subject matter described in the following sections: Section 1. (A) chlorosulfonated polyethylene, (B) a vulcanization accelerator, and (C) glycol ether, 1. A chlorosulfonated polyethylene latex composition comprising: Section 2. Item 2. The composition according to item 1, wherein (B) is at least one selected from the group consisting of aldehyde ammonia-based, aldehyde amine-based, thiourea-based, guanidine-based, thiazole-based, sulfenamide-based, thiuram-based, dithiocarbamate-based, and xanthate-based vulcanization accelerators. Section 3. Item 3. The composition according to item 1 or 2, wherein (C) is at least one selected from the group consisting of methyl glycol, methyl diglycol, methyl triglycol, methyl polyglycol, isopropyl glycol, isopropyl diglycol, butyl glycol, butyl diglycol, butyl triglycol, isobutyl glycol, isobutyl diglycol, hexyl glycol, hexyl diglycol, 2-ethylhexyl glycol, 2-ethylhexyl diglycol, allyl glycol, phenyl glycol, phenyl diglycol, benzyl glycol, benzyl diglycol, methyl propylene glycol, methyl propylene diglycol, methyl propylene triglycol, propyl propylene glycol, propyl propylene diglycol, butyl propylene diglycol, butyl propylene triglycol, phenyl propylene glycol, methyl propylene glycol acetate, dimethyl glycol, dimethyl diglycol, dimethyl triglycol, methyl ethyl diglycol, diethyl diglycol, dibutyl diglycol, and dimethyl propylene diglycol. Section 4. (B) is contained in an amount of 0.1 to 10 parts by mass per 100 parts by mass of (A); The composition according to any one of items 1 to 3. Section 5. (C) is contained in an amount of 1 to 30 parts by mass per 100 parts by mass of (A); The composition according to any one of items 1 to 4. Section 6. (B) is contained in an amount of 0.1 to 10 parts by mass per 100 parts by mass of (A); (C) is contained in an amount of 1 to 30 parts by mass per 100 parts by mass of (A); Item 1. The composition according to item 1. Section 7. A molded article obtained from the composition according to any one of items 1 to 6. Effect of the Invention

[0009] A chlorosulfonated polyethylene latex composition containing chlorosulfonated polyethylene latex, a vulcanization accelerator, and a glycol ether and having excellent film-forming properties is provided. In addition, a molded article produced from the composition has particularly excellent tensile strength. More specifically, a molded article produced from the composition can have a tensile strength that is significantly higher than the tensile strength of the original chlorosulfonated polyethylene (for example, 24 MPa described in Example 1 of Patent Document 1). The vulcanization accelerator is a component for accelerating vulcanization and does not increase the amount of vulcanization, so it is unlikely to improve the tensile strength, and the glycol ether is also unlikely to contribute to the tensile strength, so it is surprising that the tensile strength of a molded article obtained from a chlorosulfonated polyethylene latex composition containing a combination of these components is significantly improved. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Each embodiment included in the present disclosure will be described in more detail below. The present disclosure preferably includes a chlorosulfonated polyethylene latex composition containing a specific component and uses thereof, but is not limited thereto, and the present disclosure includes all that is disclosed in the present specification and that can be recognized by a person skilled in the art.

[0011] The chlorosulfonated polyethylene latex composition included in the present disclosure includes (A) a chlorosulfonated polyethylene, (B) a vulcanization accelerator, and (C) a glycol ether. In this specification, the chlorosulfonated polyethylene latex composition included in the present disclosure may be referred to as the "composition of the present disclosure." In addition, the chlorosulfonated polyethylene, the vulcanization accelerator, and the glycol ether may be referred to as the (A) component, the (B) component, and the (C) component, respectively.

[0012] Chlorosulfonated polyethylene is produced by chlorinating and chlorosulfonating polyethylene. In other words, it is chlorinated and chlorosulfonated polyethylene. Although there is no particular structural limitation intended, it may be represented, for example, by the following structural formula (the structural formula is merely shown for the convenience of aiding understanding. For example, it does not specify the continuity of each repeating unit (whether they are linked consecutively or randomly).). -(CH 2 -CH 2 ) l -(CH 2 -CH(SO 2 Cl)) m -(CH 2 -CH(Cl) n -

[0013] Although there are no particular limitations, for example, component (A) is preferably a chlorosulfonated polyethylene in which about 20 to 45 parts by mass of chlorine and about 0.1 to 5 parts by mass of sulfur are introduced per 100 parts by mass of polyethylene.

[0014] The upper or lower limit of the range of the chlorine amount (20 to 45 parts by mass) may be, for example, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, or 44 parts by mass. For example, the range may be 21 to 44 parts by mass. The upper or lower limit of the range of the sulfur content (0.1 to 5 parts by mass) may be, for example, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, or 4.9 parts by mass. For example, the range may be 0.2 to 4 parts by mass.

[0015] Although not limited thereto, according to the classification of the American Society for Testing and Materials standard ASTM D1418, chlorosulfonated polyethylene has both elastomeric properties and vulcanization properties, and does not contain double bonds in the main chain, and therefore has excellent chemical resistance, weather resistance, ozone resistance, heat resistance, etc.

[0016] The composition of the present disclosure is a chlorosulfonated polyethylene latex composition, and the chlorosulfonated polyethylene latex is a latex obtained by dispersing chlorosulfonated polyethylene in a colloidal state in water (using an emulsifier, etc., as necessary). In the composition of the present disclosure, the concentration of the chlorosulfonated polyethylene latex is preferably, for example, 30 to 60% by mass. The upper or lower limit of the range may be, for example, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, or 59% by mass. For example, the range may be 35 to 55% by mass.

[0017] The chlorosulfonated polyethylene latex used in the composition of the present disclosure is not particularly limited, and may be one produced by a known method (see, for example, Patent Document 2) or a commercially available product. An example of a known method is a method in which an organic solvent solution of chlorosulfonated polyethylene synthesized by chlorosulfonating high-pressure polyethylene with chlorine and sulfur dioxide gas is stirred with an aqueous surfactant solution using a stirrer such as a high-pressure homogenizer to prepare an emulsion, which is then desolvated and concentrated. An example of a commercially available product is Seporex CSM manufactured by Sumitomo Seika Chemicals.

[0018] The vulcanization accelerator contained in the composition of the present disclosure is not particularly limited, and for example, an aldehyde ammonia-based, aldehyde amine-based, thiourea-based, guanidine-based, thiazole-based, sulfenamide-based, thiuram-based, dithiocarbamate-based, or xanthogenate-based vulcanization accelerator can be used.

[0019] An example of the aldehyde ammonia-based vulcanization accelerator is hexamethylenetetramine.

[0020] An example of the aldehyde amine vulcanization accelerator is n-butylaldehyde aniline.

[0021] Examples of the thiourea vulcanization accelerator include N,N'-diphenylthiourea, trimethylthiourea, N,N'-diethylthiourea, and N,N'-dibutylthiourea.

[0022] Examples of the guanidine vulcanization accelerator include 1,3-diphenylguanidine, di-o-tolylguanidine, 1-o-tolylbiguanide, and di-o-tolylguanidine salts of dicatechol borate.

[0023] Examples of the thiazole-based vulcanization accelerator include 2-mercaptobenzothiazole, dibenzothiazyl disulfide, zinc salt of 2-mercaptobenzothiazole, cyclohexylamine salt of 2-mercaptobenzothiazole, dicyclohexylamine salt of 2-mercaptobenzothiazole, 2-(N,N-diethylthiocarbamoylthio)benzothiazole, and 2-(4'-morpholinodithio)benzothiazole.

[0024] Examples of the sulfenamide vulcanization accelerator include N-cyclohexyl-2-benzothiazolylsulfenamide, N-tert-butyl-2-benzothiazolylsulfenamide, N-oxydiethylene-2-benzothiazolylsulfenamide, and N,N-dicyclohexyl-2-benzothiazolylsulfenamide.

[0025] Examples of thiuram vulcanization accelerators include tetramethylthiuram disulfide, tetraethylthiuram disulfide, tetrabutylthiuram disulfide, tetrakis(2-ethylhexyl)thiuram disulfide, tetrabenzylthiuram disulfide, tetramethylthiuram monosulfide, and dipentamethylenethiuram tetrasulfide.

[0026] Examples of dithiocarbamate vulcanization accelerators include piperidine pentamethylenedithiocarbamate, pipecolyldithiocarbamate pipecoline salt, zinc dimethyldithiocarbamate, zinc diethyldithiocarbamate, zinc dibutyldithiocarbamate, zinc N-ethyl-N-phenyldithiocarbamate, zinc N-pentamethylenedithiocarbamate, zinc dibenzyldithiocarbamate, sodium diethyldithiocarbamate, sodium dibutyldithiocarbamate, copper dimethyldithiocarbamate, ferric dimethyldithiocarbamate, and tellurium diethyldithiocarbamate.

[0027] Examples of the xanthogenate vulcanization accelerator include zinc butylxanthogenate and zinc isopropylxanthogenate.

[0028] The vulcanization accelerators can be used alone or in combination of two or more.

[0029] The method of incorporating the vulcanization accelerator into the composition of the present disclosure may be, for example, a method of blending the vulcanization accelerator into the chlorosulfonated polyethylene latex. The blending method is not particularly limited, and for example, the vulcanization accelerator may be blended directly, or the vulcanization accelerator may be blended as an aqueous solution or aqueous dispersion.

[0030] The content of the vulcanization accelerator in the composition of the present disclosure is preferably 0.1 to 10 parts by mass, and more preferably 1 to 5 parts by mass, based on 100 parts by mass of the chlorosulfonated polyethylene in the composition. The upper or lower limit of the range (0.1 to 10 parts by mass) may be, for example, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, or 9.5 parts by mass. For example, the range may be 0.5 to 7.5 parts by mass.

[0031] The glycol ether contained in the composition of the present disclosure is not particularly limited, and examples thereof include methyl glycol, methyl diglycol, methyl triglycol, methyl polyglycol, isopropyl glycol, isopropyl diglycol, butyl glycol, butyl diglycol, butyl triglycol, isobutyl glycol, isobutyl diglycol, hexyl glycol, hexyl diglycol, 2 ethylhexyl glycol, 2 ethylhexyl diglycol, allyl glycol, phenyl glycol, phenyl diglycol, benzyl glycol, benzyl diglycol, methyl propylene glycol, methyl propylene diglycol, methyl propylene triglycol, propyl propylene glycol, propyl propylene diglycol, butyl propylene diglycol, butyl propylene triglycol, phenyl propylene glycol, methyl propylene glycol acetate, dimethyl glycol, dimethyl diglycol, dimethyl triglycol, methyl ethyl diglycol, diethyl diglycol, dibutyl diglycol, dimethyl propylene diglycol, etc. Among these, phenyl glycol, butyl triglycol, phenyl diglycol, methyl propylene triglycol, etc. are preferred. The glycol ether can be used alone or in combination of two or more.

[0032] The glycol ether contained in the composition of the present disclosure may be, for example, a glycol ether represented by the formula (I): R 1 -(O-CH 2 -CH(R 2 )) n -OH (I) (In the formula, R 1 represents a linear or branched alkyl group having 1, 2, 3, 4, 5, or 6 carbon atoms or a phenyl group; R 2 represents a hydrogen atom or a linear or branched alkyl group having 1, 2, or 3 carbon atoms, and n represents 1, 2, 3, 4, 5, or 6. Preferred is a compound represented by the following formula:

[0033] The method of incorporating glycol ether into the composition of the present disclosure includes, for example, blending glycol ether into chlorosulfonated polyethylene latex. The blending method is not particularly limited, and for example, the glycol ether may be blended directly, or may be blended as an aqueous solution or aqueous dispersion.

[0034] The content of glycol ether in the composition of the present disclosure is preferably 1 to 30 parts by mass, more preferably 5 to 20 parts by mass, relative to 100 parts by mass of chlorosulfonated polyethylene in the composition. The upper or lower limit of the range (1 to 30 parts by mass) may be, for example, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, or 29 parts by mass. For example, the range may be 2 to 29 parts by mass.

[0035] The composition of the present disclosure is a chlorosulfonated polyethylene latex composition, and as described above, is a composition in which fine particles of chlorosulfonated polyethylene are dispersed in an aqueous medium. Therefore, the composition of the present disclosure also includes an aqueous medium. As the aqueous medium, water is preferable, and various types of water such as tap water, industrial water, ion-exchanged water, deionized water, and pure water can be used. In particular, deionized water or pure water is preferable.

[0036] The composition of the present disclosure may contain components other than the components (A) to (C) within a range that does not impair the above-mentioned effects. Examples of such components include thickeners, tackifiers, pH adjusters, plasticizers, film-forming aids, crosslinking agents, crosslinking aids, fillers, antioxidants, metal oxides, defoamers, stabilizers, and the like. In addition, a surfactant (emulsifier) ​​may be included to aid dispersion. In addition, a latex other than the chlorosulfonated polyethylene latex may be included. Examples of such latexes include butadiene latex, butadiene-styrene copolymer latex, dicarboxylated butadiene-styrene copolymer latex, vinylpyridine-butadiene-styrene terpolymer latex, isoprene rubber latex, acrylonitrile-butadiene copolymer latex, hydrogenated acrylonitrile-butadiene copolymer latex, polyolefin emulsion, and the like. The latex other than the chlorosulfonated polyethylene latex may be used alone or in combination of two or more.

[0037] The method for producing the composition of the present disclosure includes, for example, a method in which a chlorosulfonated polyethylene latex is prepared by a known method or a method that can be easily derived from a known method, and then the components (B) and (C) (and other components as necessary) are added to the chlorosulfonated polyethylene latex and mixed. These components may be mixed in advance before addition, or may be added to the chlorosulfonated polyethylene latex one by one. These components may be added directly as they are, or an aqueous solution or aqueous dispersion of these components may be prepared in advance and then added.

[0038] Molded articles such as thin film articles produced using the composition of the present disclosure can be formed, for example, by applying the composition of the present disclosure to the surface of an object to be coated or a mold for a molded article, and drying it.

[0039] The material and shape of the object to be coated with the composition of the present disclosure or the molded product are not particularly limited, and examples of the material include paper, glass, wood, various metals, cement, resins, rubber, etc., and examples of the shape include a flat plate, a sphere, a human handprint, fiber, and textiles, etc.

[0040] The method for applying the composition of the present disclosure to the surface of an object to be coated or a molded product is not particularly limited, and examples thereof include brush application, spraying, bar coating, dipping, and the like.

[0041] The method for drying the composition of the present disclosure after it is applied to the surface of an object to be coated or a molded product is not particularly limited, and examples thereof include natural drying at room temperature, air drying, heat drying, reduced pressure drying, freeze drying, etc. From the viewpoint of workability and the time required for drying, heat drying is preferred.

[0042] The temperature for heating and drying the composition of the present disclosure is not particularly limited as long as the water in the chlorosulfonated polyethylene latex contained in the chlorosulfonated polyethylene latex composition is evaporated, and from the viewpoint of workability and the time required for drying, the temperature is preferably, for example, 20 to 200° C., and more preferably 70 to 150° C. The temperature for heating and drying may be constant or may be changed during drying, or drying may be performed while changing the drying temperature.

[0043] The heat-drying time of the composition of the present disclosure is not particularly limited as long as the conditions are such that water in the chlorosulfonated polyethylene latex contained in the chlorosulfonated polyethylene latex composition is volatilized. From the viewpoints of workability and the time required for drying, the heat-drying time is preferably 5 minutes to 24 hours, and more preferably 1 hour to 12 hours.

[0044] Also, for example, a second layer molded product can be provided on a first layer molded product formed by the above-mentioned method.

[0045] The compositions of the present disclosure are particularly suitable for applications such as paints, exterior coatings, and thin film article preparations.

[0046] In addition, in this specification, the term "comprising" includes "consisting essentially of" and "consisting of." In addition, the present disclosure includes all arbitrary combinations of the constituent features described in this specification.

[0047] In addition, the various characteristics (properties, structures, functions, etc.) described in each embodiment of the present disclosure above may be combined in any way to specify the subject matter included in the present disclosure. In other words, the present disclosure includes all subject matter consisting of all combinations of each combinable characteristic described in this specification. EXAMPLES

[0048] Hereinafter, the embodiments of the present disclosure will be described more specifically with reference to examples, but the embodiments of the present disclosure are not limited to the following examples.

[0049] [Evaluation method] Each measurement was carried out by the following method.

[0050] (1) Film formability Chlorosulfonated polyethylene latex compositions were produced under the conditions described in each Example and Comparative Example, and molded articles were produced by the following treatment. The molded articles were then visually inspected to evaluate their film formability, with a rating of "O" if there were no cracks and a rating of "X" if there were cracks.

[0051] A glass container (14 cm length × 14 cm width × 2 cm height) was placed horizontally in an oven (manufactured by ESPEC, model: PVH-231), and 20 g of the chlorosulfonated polyethylene latex composition was gently poured into the glass container.

[0052] The inner temperature of the oven was set to 70° C., and the mixture was dried by heating for 5 hours, and then changed to 120° C. and dried by heating for 2 hours.

[0053] The glass container was removed from the oven and allowed to cool to room temperature to obtain a molded product of a chlorosulfonated polyethylene latex composition.

[0054] (2) Tensile strength of molded body A chlorosulfonated polyethylene latex composition was produced under the conditions described in each Example and Comparative Example, and a molded article of the composition was produced by the same method as described in "(1) Film-forming property" above. The tensile strength of the molded article was then measured. The tensile strength of the molded article was measured based on JIS K6251:2010. Specifically, the obtained molded article was punched into a dumbbell-shaped No. 4 shape, and measured at a tensile speed of 200 mm / min using a tensile tester (AUTOGRAPH AGS-X 10kN, manufactured by Shimadzu Corporation). The tensile strength measured by the above method is preferably about 30 to 40 MPa.

[0055] [Example 1] To 100 g of chlorosulfonated polyethylene latex having a solid content of 40% (manufactured by Sumitomo Seika Chemicals, product name: Seporex CSM), 0.8 g (1 part by mass per 100 parts by mass of the solid content of the chlorosulfonated polyethylene latex) of 50% aqueous sodium dibutyldithiocarbamate solution (manufactured by Ouchi Shinko Chemical Industry Co., Ltd., product name: Noccela TP) as a vulcanization accelerator and 2.0 g of phenyl glycol (5 parts by mass per 100 parts by mass of the solid content of the chlorosulfonated polyethylene latex) as a glycol ether were added, to obtain a chlorosulfonated polyethylene latex composition.

[0056] [Example 2] To 100 g of chlorosulfonated polyethylene latex having a solid content of 40% (manufactured by Sumitomo Seika Chemicals, product name: Seporex CSM), 2.4 g (3 parts by mass per 100 parts by mass of the solid content of the chlorosulfonated polyethylene latex) of 50% aqueous sodium dibutyldithiocarbamate solution (manufactured by Ouchi Shinko Chemical Industry Co., Ltd., product name: Noccela TP) as a vulcanization accelerator and 2.0 g of phenyl glycol (5 parts by mass per 100 parts by mass of the solid content of the chlorosulfonated polyethylene latex) as a glycol ether were added to obtain a chlorosulfonated polyethylene latex composition.

[0057] [Example 3] To 100 g of chlorosulfonated polyethylene latex having a solid content of 40% (manufactured by Sumitomo Seika Chemicals, product name: Seporex CSM), 0.8 g (1 part by mass per 100 parts by mass of the solid content of the chlorosulfonated polyethylene latex) of 50% aqueous sodium dibutyldithiocarbamate solution (manufactured by Ouchi Shinko Chemical Industry Co., Ltd., product name: Noccela TP) as a vulcanization accelerator and 4.0 g of phenyl glycol (10 parts by mass per 100 parts by mass of the solid content of the chlorosulfonated polyethylene latex) as a glycol ether were added, to obtain a chlorosulfonated polyethylene latex composition.

[0058] [Example 4] To 100 g of chlorosulfonated polyethylene latex having a solid content of 40% (manufactured by Sumitomo Seika Chemicals, product name: Seporex CSM), 2.4 g (3 parts by mass per 100 parts by mass of the solid content of the chlorosulfonated polyethylene latex) of 50% aqueous sodium dibutyldithiocarbamate solution (manufactured by Ouchi Shinko Chemical Industry Co., Ltd., product name: Noccela TP) as a vulcanization accelerator and 4.0 g of phenyl glycol (10 parts by mass per 100 parts by mass of the solid content of the chlorosulfonated polyethylene latex) as a glycol ether were added, to obtain a chlorosulfonated polyethylene latex composition.

[0059] [Example 5] To 100 g of chlorosulfonated polyethylene latex having a solid content of 40% (manufactured by Sumitomo Seika Chemicals, product name: Seporex CSM), 4.0 g (5 parts by mass per 100 parts by mass of the solid content of the chlorosulfonated polyethylene latex) of 50% aqueous sodium dibutyldithiocarbamate solution (manufactured by Ouchi Shinko Chemical Industry Co., Ltd., product name: Noccela TP) as a vulcanization accelerator and 4.0 g of phenyl glycol (10 parts by mass per 100 parts by mass of the solid content of the chlorosulfonated polyethylene latex) as a glycol ether were added, to obtain a chlorosulfonated polyethylene latex composition.

[0060] [Example 6] To 100 g of chlorosulfonated polyethylene latex having a solid content of 40% (manufactured by Sumitomo Seika Chemicals, product name: Seporex CSM), 2.4 g (3 parts by mass per 100 parts by mass of the solid content of the chlorosulfonated polyethylene latex) of 50% aqueous sodium dibutyldithiocarbamate solution (manufactured by Ouchi Shinko Chemical Industry Co., Ltd., product name: Noccela TP) as a vulcanization accelerator and 4.0 g (10 parts by mass per 100 parts by mass of the solid content of the chlorosulfonated polyethylene latex) of butyl triglycol as a glycol ether were added, to obtain a chlorosulfonated polyethylene latex composition.

[0061] [Example 7] To 100 g of chlorosulfonated polyethylene latex having a solid content of 40% (manufactured by Sumitomo Seika Chemicals, product name: Seporex CSM), 2.4 g (3 parts by mass per 100 parts by mass of the solid content of the chlorosulfonated polyethylene latex) of 50% aqueous sodium dibutyldithiocarbamate solution (manufactured by Ouchi Shinko Chemical Industry Co., Ltd., product name: Noccela TP) as a vulcanization accelerator and 4.0 g of phenyl diglycol as a glycol ether (10 parts by mass per 100 parts by mass of the solid content of the chlorosulfonated polyethylene latex) were added to obtain a chlorosulfonated polyethylene latex composition.

[0062] [Example 8] To 100 g of chlorosulfonated polyethylene latex with a solid content of 40% (manufactured by Sumitomo Seika Chemicals, product name: Seporex CSM), 2.4 g (3 parts by mass per 100 parts by mass of the solid content of the chlorosulfonated polyethylene latex) of 50% aqueous sodium dibutyldithiocarbamate solution (manufactured by Ouchi Shinko Chemical Industry Co., Ltd., product name: Noccela TP) as a vulcanization accelerator and 4.0 g (10 parts by mass per 100 parts by mass of the solid content of the chlorosulfonated polyethylene latex) of methyl propylene triglycol as a glycol ether were added, to obtain a chlorosulfonated polyethylene latex composition.

[0063] [Example 9] To 100 g of chlorosulfonated polyethylene latex having a solid content of 40% (manufactured by Sumitomo Seika Chemicals, product name: Seporex CSM), 2.4 g (3 parts by mass per 100 parts by mass of the solid content of the chlorosulfonated polyethylene latex) of 50% aqueous sodium dibutyldithiocarbamate solution (manufactured by Ouchi Shinko Chemical Industry Co., Ltd., product name: Noccela TP) as a vulcanization accelerator and 6.0 g (15 parts by mass per 100 parts by mass of the solid content of the chlorosulfonated polyethylene latex) of butyl triglycol as a glycol ether were added, to obtain a chlorosulfonated polyethylene latex composition.

[0064] [Example 10] To 100 g of chlorosulfonated polyethylene latex having a solid content of 40% (manufactured by Sumitomo Seika Chemicals, product name: Seporex CSM), 2.4 g (3 parts by mass per 100 parts by mass of the solid content of the chlorosulfonated polyethylene latex) of 50% aqueous sodium dibutyldithiocarbamate solution (manufactured by Ouchi Shinko Chemical Industry Co., Ltd., product name: Noccela TP) as a vulcanization accelerator and 8.0 g (20 parts by mass per 100 parts by mass of the solid content of the chlorosulfonated polyethylene latex) of butyl triglycol as a glycol ether were added, to obtain a chlorosulfonated polyethylene latex composition.

[0065] [Example 11] To 100 g of chlorosulfonated polyethylene latex (manufactured by Sumitomo Seika Chemicals, product name: Seporex CSM) having a solid content of 40%, 1.2 g (3 parts by mass per 100 parts by mass of the solid content of the chlorosulfonated polyethylene latex) of zinc N-ethyl-N-phenyldithiocarbamate (manufactured by Ouchi Shinko Chemical Industry Co., Ltd., product name: Noccela PX) as a vulcanization accelerator and 4.0 g of butyl triglycol as a glycol ether (10 parts by mass per 100 parts by mass of the solid content of the chlorosulfonated polyethylene latex) were added to obtain a chlorosulfonated polyethylene latex composition.

[0066] [Example 12] To 100 g of chlorosulfonated polyethylene latex (manufactured by Sumitomo Seika Chemicals, product name: Seporex CSM) having a solid content of 40%, 1.2 g (3 parts by mass per 100 parts by mass of the solid content of the chlorosulfonated polyethylene latex) of dipentamethylene thiuram tetrasulfide (manufactured by Ouchi Shinko Chemical Industry Co., Ltd., product name: Noccela TRA) as a vulcanization accelerator and 4.0 g of butyl triglycol as a glycol ether (10 parts by mass per 100 parts by mass of the solid content of the chlorosulfonated polyethylene latex) were added to obtain a chlorosulfonated polyethylene latex composition.

[0067] [Example 13] To 100 g of chlorosulfonated polyethylene latex having a solid content of 40% (manufactured by Sumitomo Seika Chemicals, product name: Seporex CSM), 1.2 g (3 parts by mass per 100 parts by mass of the solid content of the chlorosulfonated polyethylene latex) of zinc salt of 2-mercaptobenzothiazole (manufactured by Ouchi Shinko Chemical Industry Co., Ltd., product name: Noccela MZ) as a vulcanization accelerator and 4.0 g of butyl triglycol as a glycol ether (10 parts by mass per 100 parts by mass of the solid content of the chlorosulfonated polyethylene latex) were added, thereby obtaining a chlorosulfonated polyethylene latex composition.

[0068] [Comparative Example 1] Nothing in particular was added to 100 g of chlorosulfonated polyethylene latex having a solid content of 40% (manufactured by Sumitomo Seika Chemicals, product name: Seporex CSM), to prepare a chlorosulfonated polyethylene latex composition.

[0069] [Comparative Example 2] To 100 g of chlorosulfonated polyethylene latex with a solid content of 40% (manufactured by Sumitomo Seika Chemicals, product name: Seporex CSM), 2.4 g (3 parts by mass per 100 parts by mass of the solid content of the chlorosulfonated polyethylene latex) of a 50% aqueous sodium dibutyldithiocarbamate solution (manufactured by Ouchi Shinko Chemical Industry Co., Ltd., product name: Noccela TP) was added as a vulcanization accelerator, without adding glycol ether, to obtain a chlorosulfonated polyethylene latex composition.

[0070] [Comparative Example 3] To 100 g of chlorosulfonated polyethylene latex having a solid content of 40% (manufactured by Sumitomo Seika Chemicals, product name: Seporex CSM), without adding a vulcanization accelerator, 4.0 g of butyl triglycol (10 parts by mass relative to 100 parts by mass of the solid content of the chlorosulfonated polyethylene latex) was added as a glycol ether to obtain a chlorosulfonated polyethylene latex composition.

[0071] The film-formability of the chlorosulfonated polyethylene compositions obtained in the examples and comparative examples and the tensile strength of the molded articles thereof are shown in Table 1 below.

[0072] [Table 1] Noccela TP (dithiocarbamate type): Sodium dibutyldithiocarbamate Noccela PX (dithiocarbamate type): zinc N-ethyl-N-phenyldithiocarbamate Noccela TRA (thiuram type): Dipentamethylene thiuram tetrasulfide Noccela MZ (thiazole type): zinc salt of 2-mercaptobenzothiazole

[0073] As shown in Table 1, the chlorosulfonated polyethylene latex compositions obtained in the respective Examples had good film-forming properties, and the tensile strength of the molded articles was remarkably improved. In contrast, the chlorosulfonated polyethylene latex compositions obtained in the respective Comparative Examples showed some improvement in film-forming properties, but did not show improvement in the tensile strength of the molded articles.

[0074] From the above, it has been demonstrated that the chlorosulfonated polyethylene latex composition containing chlorosulfonated polyethylene latex, a vulcanization accelerator, and glycol ether has good film-forming properties, and a molded article produced from the chlorosulfonated polyethylene latex composition has a tensile strength significantly greater than that of the original chlorosulfonated polyethylene (for example, 24 MPa described in Example 1 of Patent Document 1).

Claims

1. (A) chlorosulfonated polyethylene, (B) a vulcanization accelerator, and (C) glycol ether, Including, The (C) is represented by the formula (I): R 1 -(O-CH 2 -CH(R 2 )) n -OH (I) (In the formula, R 1 represents a linear or branched alkyl group having 1, 2, 3, 4, 5, or 6 carbon atoms or a phenyl group; R 2 represents a hydrogen atom or a linear or branched alkyl group having 1, 2, or 3 carbon atoms; and n represents 1, 2, 3, 4, 5, or 6.) The compound represented by the formula: Chlorosulfonated polyethylene latex composition.

2. The composition according to claim 1, wherein (B) is at least one selected from the group consisting of aldehyde ammonia-based, aldehyde amine-based, thiourea-based, guanidine-based, thiazole-based, sulfenamide-based, thiuram-based, dithiocarbamate-based, and xanthate-based vulcanization accelerators.

3. The composition according to claim 1 or 2, wherein (C) is at least one selected from the group consisting of methyl glycol, methyl diglycol, methyl triglycol, isopropyl glycol, isopropyl diglycol, butyl glycol, butyl diglycol, butyl triglycol, isobutyl glycol, isobutyl diglycol, hexyl glycol, hexyl diglycol, phenyl glycol, phenyl diglycol, methyl propylene glycol, methyl propylene diglycol, methyl propylene triglycol, propyl propylene glycol, propyl propylene diglycol, butyl propylene diglycol, butyl propylene triglycol, and phenyl propylene glycol.

4. (B) is contained in an amount of 0.1 to 10 parts by mass per 100 parts by mass of (A); The composition according to any one of claims 1 to 3.

5. (C) is contained in an amount of 1 to 30 parts by mass per 100 parts by mass of (A); The composition according to any one of claims 1 to 4.

6. (B) is contained in an amount of 0.1 to 10 parts by mass per 100 parts by mass of (A); (C) is contained in an amount of 1 to 30 parts by mass per 100 parts by mass of (A); The composition of claim 1.

7. A molded article obtained from the composition according to any one of claims 1 to 6.

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