US20060052501A1 - Process for producing glove having interpenetrating network structure - Google Patents
Process for producing glove having interpenetrating network structure Download PDFInfo
- Publication number
- US20060052501A1 US20060052501A1 US11/265,469 US26546905A US2006052501A1 US 20060052501 A1 US20060052501 A1 US 20060052501A1 US 26546905 A US26546905 A US 26546905A US 2006052501 A1 US2006052501 A1 US 2006052501A1
- Authority
- US
- United States
- Prior art keywords
- latex
- weight
- process according
- total weight
- base
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/06—Copolymers with styrene
- C08L9/08—Latex
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L13/00—Compositions of rubbers containing carboxyl groups
- C08L13/02—Latex
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C08L23/0853—Vinylacetate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/013—Fillers, pigments or reinforcing additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L31/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid or of a haloformic acid; Compositions of derivatives of such polymers
- C08L31/02—Homopolymers or copolymers of esters of monocarboxylic acids
- C08L31/04—Homopolymers or copolymers of vinyl acetate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L51/04—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to rubbers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/02—Copolymers with acrylonitrile
- C08L9/04—Latex
Definitions
- the present invention relates to a process for producing a glove, and more particularly to a process for producing a glove having an interpenetrating network structure.
- a conventional glove is produced by blending PVC materials with plasticizers.
- the PVCs When such glove is combusted, for example in the case of fire or being incinerated, the PVCs will be oxidized to generate corrosive gases and toxic gases such as dioxin, and the plasticizers will be oxidized to generate various contaminating substances.
- the corrosive gases are considered responsible for pulmonary edema when being inhaled and for serious damages of instruments in contact therewith. Dioxin and some of the contaminating substances might also cause the problems of environmental hormone and the like.
- these conventional gloves In views of environmental protection, these conventional gloves have been eliminated through competition. Therefore, there is always a need to develop an improved glove so as to meet the requirement of environmental protection.
- a glove made of natural rubber is known to be environmentally-friendly, the mechanical properties such as Young's modulus of the natural rubber glove are unsatisfactory.
- the natural rubber is disadvantageous to be a source of irritation such as skin itch, asthma and shock, etc.
- JP 9-505612 (1997) described a glove manufactured by nitrile-butadiene rubber (NBR) latex. Although the NBR glove contains no known sources of irritation and has good resistance to chemical solvents, the commercial applications thereof are limited due to high manufacturing costs.
- NBR nitrile-butadiene rubber
- JP 55-163202 (1980) described a process for manufacturing a glove by using styrene-butadiene rubber (SBR).
- SBR styrene-butadiene rubber
- the SBR material is cost-effective.
- such glove has poor tensile stress and low tear strength, and the immersion molding effects of such glove are unsatisfactory.
- JP 7-506642 (1995) described a process for manufacturing a glove by using thermoplastic butadiene-styrene-butadiene block polymers. Their commercial applications are limited due to the poor flexibility of such materials and complex processes for producing the gloves therefrom.
- a process for producing a glove having an interpenetrating network structure Firstly, a mold is contacted with an elastomeric composition comprising a base latex and a thermoplastic ethylene-vinylacetate (EVA) copolymer latex, wherein the base latex comprises a styrene-butadiene rubber (SBR) latex and a carboxylated styrene-butadiene rubber (C-SBR) latex, and the mixing ratio of the base latex to the EVA copolymer latex is from 95:5 to 40:60. Then, the elastomeric composition on the mold is allowed to perform a vulcanization reaction, thereby forming the elastomeric article having the interpenetrating network structure.
- EVA thermoplastic ethylene-vinylacetate
- the process further comprises a step of immersing the mold into a solution of a coagulant selected from a group consisting of calcium nitrate, calcium chloride, alky ammonium and a combination thereof, before the step of contacting the mold with the elastomeric composition.
- a coagulant selected from a group consisting of calcium nitrate, calcium chloride, alky ammonium and a combination thereof
- the process further comprises a step of surface-treating the mold after the step of contacting the mold with the elastomeric composition and before the vulcanization reaction is performed.
- the step of surface-treating the mold is performed by using a surface-treating agent comprising 10 ⁇ 20% by weight of a synthesized resin, 10 ⁇ 20% by weight of an acrylic-styrene resin, 1 ⁇ 10% by weight of a silicon resin and the balance of water.
- the base latex comprises from 1% to 40% by mole of carboxylate group.
- the base latex comprises from 5% to 20 % by mole of carboxylate group.
- the elastomeric composition further comprises at least one additive selected from a group consisting of activators, vulcanization agents, vulcanization accelerators, anti-aging agents, enforcement agents, fillers and additional latices.
- the activator includes zinc oxides, in amount of from 1% to 10% by weight based on the total weight of the base latex and the EVA copolymer latex.
- the vulcanization agent includes sulfur, organic sulfide and a combination thereof, in amount of from 0.1% to 2% by weight based on the total weight of the base latex and the EVA copolymer latex.
- the vulcanization agent includes at least one selected from a group consisting of zinc N-ethyl-N-phenyldithiocarbamate, zinc dimethyldithiocarbamate, zinc diethyldithiocarbamate, zinc dibutyldithiocarbamate, zinc mercaptobenzothiazole, tetramethyl disulfide and a combination thereof, in amount of from 0.5% to 10% by weight based on the total weight of the base latex and the EVA copolymer latex.
- the anti-aging agent includes phenolic compounds or amine compounds, in amount of from 0.5% to 3% by weight based on the total weight of the base latex and the EVA copolymer latex.
- the enforcement agent includes at least one selected from a group consisting of nano-scale montmorillonite, mica, clay, bentonite, saponite, silica, titanium dioxide, potassium titanate whisker and a combination thereof, in amount of less than 20% by weight based on the total weight of the base latex and the EVA copolymer latex.
- the additive includes at least one selected from a group consisting of photocatalyst, talcum powder, calcium carbonate, titanium dioxide, antistatic agent, far infrared-ray emitting agent, pigment and a combination thereof, in amount of less than 20% by weight based on the total weight of the base latex and the EVA copolymer latex.
- the additional latices include aqueous polyurethane, aqueous nitrile rubber latex, acrylic resin latex and a combination thereof, in amount of less than 50% by weight based on the total weight of the base latex and the EVA copolymer latex.
- a process for producing a glove having an interpenetrating network structure Firstly, a mold is contacted with an elastomeric composition.
- the elastomeric composition includes a latex mixture comprising a base latex and a thermoplastic ethylene-vinylacetate (EVA) copolymer latex, wherein the base latex comprises a styrene-butadiene rubber (SBR) latex and a carboxylated styrene-butadiene rubber (C-SBR) latex, 1 ⁇ 10 weight parts of an activator; 0.1 ⁇ 2 weight parts of a vulcanization agent; and 0.5 ⁇ 10 weight parts of a vulcanization accelerator.
- SBR styrene-butadiene rubber
- C-SBR carboxylated styrene-butadiene rubber
- the composition further comprises 0.5 ⁇ 3 weight parts of an anti-aging agent, optionally an enforcement agent less than 20 weight parts, optionally a filler less than 20 weight parts and optionally additional latices less than 50 weight parts.
- the objects of meeting the requirements of environmental protection and cost-effectiveness can be achieved by a method of the present invention for producing an elastomeric article having an interpenetrating network structure.
- the elastomeric composition of the present invention comprises a base latex and a thermoplastic ethylene-vinylacetate (EVA) copolymer latex.
- the base latex comprises at least one of a styrene-butadiene rubber (SBR) latex and a carboxylated styrene-butadiene rubber (C-SBR) latex.
- SBR styrene-butadiene rubber
- C-SBR carboxylated styrene-butadiene rubber
- suitable additives for example activators, vulcanization agents, vulcanization accelerators, anti-aging agents, enforcement agents, fillers and additional latices, can be combined into the elastomeric composition so as to impart desirable properties of the produced elastomeric articles.
- the base latex and the EVA copolymer latex of the elastomeric composition are cross-linked to form the interpenetrating network structure of the elastomeric article having the interpenetrating network structure so as to impart excellent elastomeric properties such as elasticity and extensibility, as will be described hereinafter. More specifically, due to the excellent elasticity and extensibility, the elastomeric article produced from the elastomeric composition will generate different contractible degrees for the moving and motionless portions of the wearer. Thus, the wearer can feel the elastomeric article next to the skin.
- the carboxylated styrene-butadiene rubber (C-SBR) latex is obtained by introducing carboxylate groups into the molecule chains of SBR.
- the base latex comprises preferably from 1% to 40%, and more preferably from 5% to 20 % by mole of carboxylate groups.
- the presence of the C-SBR latex can provide good immersion molding effects of the produced elastomeric article and increase hydrogen-bond density of the SBR latex. The tensile stress and tear strength of the elastomeric article can be enhanced accordingly.
- the hydrogen bonding of C-SBR and/or SBR latex and EVA copolymer latex is increased during vulcanization so as to promote formation of the interpenetrating network structure.
- the EVA copolymer latex can also increase immersion molding effects of the produced elastomeric article, and thus provides good softness and touch feel.
- the above-mentioned base latex can be used alone or in a mixture of at least two C-SBR lattices with different carboxylate groups.
- the combination of the SBR latex and the C-SBR latex can be used.
- the mixing ratio of the base latex to the EVA copolymer latex is preferably from 99:1 to 5:95, and more preferably from 95:5 to 40:60.
- the activator used in the present invention may be zinc oxides, in amount of from 1% to 10% by weight based on the total weight of the base latex and the EVA copolymer latex.
- the vulcanization agent includes for example sulfur, organic sulfide and a combination thereof, in amount of from 0.1% to 2% by weight based on the total weight of the base latex and the EVA copolymer latex.
- the vulcanization agent is used to promote vulcanization reaction and can include for example zinc N-ethyl-N-phenyldithio-carbamate (PX), zinc dimethyldithiocarbamate (PZ), zinc diethyldithiocarbamate (EZ), zinc dibutyldithiocarbamate (BZ), zinc mercaptobenzothiazole (MZ), tetramethyl disulfide and a combination thereof, in amount of from 0.5% to 10% by weight based on the total weight of the base latex and the EVA copolymer latex.
- PX zinc N-ethyl-N-phenyldithio-carbamate
- PZ zinc dimethyldithiocarbamate
- EZ zinc diethyldithiocarbamate
- BZ zinc dibutyldithiocarbamate
- MZ zinc mercaptobenzothiazole
- tetramethyl disulfide in amount of from 0.5% to
- the anti-aging agent may be phenolic compounds or amine compounds, in amount of from 0.5% to 3% by weight based on the total weight of the base latex and the EVA copolymer latex.
- the enforcement agent used in the present invention includes for example nano-scale montmorillonite, mica, clay, bentonite, saponite, silica, titanium dioxide, potassium titanate whisker and a combination thereof, in amount of less than 20% by weight based on the total weight of the base latex and the EVA copolymer latex.
- the additive used in the present invention includes for example photocatalyst, talcum powder, calcium carbonate, titanium dioxide, antistatic agent, far infrared-ray emitting agent, pigment and a combination thereof, in amount of less than 20% by weight based on the total weight of the base latex and the EVA copolymer latex.
- the additional latices can include for example aqueous polyurethane, aqueous nitrile rubber (NBR) latex, acrylic resin latex and a combination thereof, in amount of less than 50% by weight based on the total weight of the base latex and the EVA copolymer latex.
- NBR aqueous nitrile rubber
- additives described hereinbefore can be incorporated into the elastomeric composition of the present invention in combination with a dispersing agent so as to increase dispersing effect thereof.
- a dispersing agent can be any suitable surfactant in amount of from 0.3% to 1% by weight based on the weight of the additive to be used.
- a process for producing a glove will be described as follows. Firstly, a glove mold is immersed in a solution of a coagulant comprising calcium nitrate, calcium chloride, alky ammonium or a combination thereof. After the coagulant is precipitated from the solution, the glove mold is removed and dried. Then, the glove mold is immersed in an elastomeric composition of the present invention, removed and dried. Optionally, the glove mold is surface-treated by using a surface-treating agent comprising 10 ⁇ 20% by weight of a synthesized resin, 10 ⁇ 20% by weight of an acrylic-styrene resin, 1 ⁇ 10% by weight of a silicon resin and the balance of water.
- a surface-treating agent comprising 10 ⁇ 20% by weight of a synthesized resin, 10 ⁇ 20% by weight of an acrylic-styrene resin, 1 ⁇ 10% by weight of a silicon resin and the balance of water.
- the elastomeric composition on the surface-treated glove mold is vulcanized at a temperature between 90 and 180° C. for several minutes to several hundred minutes. After the vulcanized elastomeric composition is cooled and demolded, a glove having an interpenetrating network structure is formed.
- Example# Component 1 2 3 4 SBR 100 0 40 50 C-SBR* 0 100 60 50 EVA 20 10 12 15 Sulfur 0.6 0.6 0.6 0.6 Zinc oxide 2 2 2 2 PX** 2 2 2 nano-scale clay 6 6 6 6 aqueous nitrile rubber 10 10 10 10 latex water 20 20 20 *comprising 10% by mole of carboxylate group **zinc N-ethyl-N-phenyldithiocarbamate
- the glove mold is surface-treated by using a surface-treating agent comprising 15% by weight of a synthesized resin, 15% by weight of an acrylic-styrene resin, 4% by weight of a silicon resin and 66% by weight of water. Then, the elastomeric composition on the surface-treated glove mold is vulcanized at a temperature of 150° C. for 15 minutes. After the vulcanized elastomeric compositions are cooled and demolded, gloves having interpenetrating network structures are formed.
- Table 2 shows the test results of physical properties of the gloves produced in the examples 1 ⁇ 4.
- Example# Physical properties 1 2 3 4 Ultimate tensile stress (MPa) 20.3 23.3 21.9 20.5 Ultimate elongation (%) 560 740 680 620 Tensile stress @ 100% (MPa) 1.03 1.18 1.10 1.06 Tensile stress @ 200% (MPa) 1.90 2.27 2.11 2.03 Tensile stress @ 300% (MPa) 2.87 3.38 3.22 3.12 Tensile stress @ 400% (MPa) 4.67 5.13 5.01 4.88 Tensile stress @ 500% (MPa) 5.77 7.70 7.12 6.99
- the combustion tests of the above gloves are performed to measure acidity of the combusted gases and contents of dioxin.
- the results of the combustion tests show that the acidities of the combusted gases have pH values between 4.0 and 4.6, and the dioxin content is approximately 0 ng/g.
- the acidities of the combusted gases for a commercial PVC glove is about pH 2.0, and the dioxin content is about 25 ng/g.
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Gloves (AREA)
- Moulding By Coating Moulds (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
A process for producing an elastomeric article having an interpenetrating network structure included the following steps. Firstly, a mold is contacted with an elastomeric composition. The elastomeric composition includes a base latex and a thermoplastic ethylene-vinylacetate (EVA) copolymer latex. The base latex includes a styrene-butadiene rubber (SBR) latex and a carboxylated styrene-butadiene rubber (C-SBR) latex, and the mixing ratio of the base latex to the EVA copolymer latex is from 95:5 to 40:60. Then, the elastomeric composition on the mold is allowed to perform a vulcanization reaction, thereby forming the elastomeric article having the interpenetrating network structure.
Description
- This application is a divisional application of application Ser. No. 10/447,723, filed May 29, 2003, which application is incorporated herein by reference.
- The present invention relates to a process for producing a glove, and more particularly to a process for producing a glove having an interpenetrating network structure.
- A conventional glove is produced by blending PVC materials with plasticizers. When such glove is combusted, for example in the case of fire or being incinerated, the PVCs will be oxidized to generate corrosive gases and toxic gases such as dioxin, and the plasticizers will be oxidized to generate various contaminating substances. The corrosive gases are considered responsible for pulmonary edema when being inhaled and for serious damages of instruments in contact therewith. Dioxin and some of the contaminating substances might also cause the problems of environmental hormone and the like. In views of environmental protection, these conventional gloves have been eliminated through competition. Therefore, there is always a need to develop an improved glove so as to meet the requirement of environmental protection.
- Although a glove made of natural rubber is known to be environmentally-friendly, the mechanical properties such as Young's modulus of the natural rubber glove are unsatisfactory. In addition, the natural rubber is disadvantageous to be a source of irritation such as skin itch, asthma and shock, etc.
- JP 9-505612 (1997) described a glove manufactured by nitrile-butadiene rubber (NBR) latex. Although the NBR glove contains no known sources of irritation and has good resistance to chemical solvents, the commercial applications thereof are limited due to high manufacturing costs.
- JP 55-163202 (1980) described a process for manufacturing a glove by using styrene-butadiene rubber (SBR). The SBR material is cost-effective. However, such glove has poor tensile stress and low tear strength, and the immersion molding effects of such glove are unsatisfactory.
- JP 7-506642 (1995) described a process for manufacturing a glove by using thermoplastic butadiene-styrene-butadiene block polymers. Their commercial applications are limited due to the poor flexibility of such materials and complex processes for producing the gloves therefrom.
- It is an object of the present invention to provide a cost-effective process for producing a glove from an elastomeric composition, which has an interpenetrating network structure.
- In accordance with a first aspect of the present invention, there is provided a process for producing a glove having an interpenetrating network structure. Firstly, a mold is contacted with an elastomeric composition comprising a base latex and a thermoplastic ethylene-vinylacetate (EVA) copolymer latex, wherein the base latex comprises a styrene-butadiene rubber (SBR) latex and a carboxylated styrene-butadiene rubber (C-SBR) latex, and the mixing ratio of the base latex to the EVA copolymer latex is from 95:5 to 40:60. Then, the elastomeric composition on the mold is allowed to perform a vulcanization reaction, thereby forming the elastomeric article having the interpenetrating network structure.
- In an embodiment, the process further comprises a step of immersing the mold into a solution of a coagulant selected from a group consisting of calcium nitrate, calcium chloride, alky ammonium and a combination thereof, before the step of contacting the mold with the elastomeric composition.
- In an embodiment, the process further comprises a step of surface-treating the mold after the step of contacting the mold with the elastomeric composition and before the vulcanization reaction is performed.
- In an embodiment, the step of surface-treating the mold is performed by using a surface-treating agent comprising 10˜20% by weight of a synthesized resin, 10˜20% by weight of an acrylic-styrene resin, 1˜10% by weight of a silicon resin and the balance of water.
- Preferably, the base latex comprises from 1% to 40% by mole of carboxylate group.
- Preferably, the base latex comprises from 5% to 20 % by mole of carboxylate group.
- In an embodiment, the elastomeric composition further comprises at least one additive selected from a group consisting of activators, vulcanization agents, vulcanization accelerators, anti-aging agents, enforcement agents, fillers and additional latices.
- Preferably, the activator includes zinc oxides, in amount of from 1% to 10% by weight based on the total weight of the base latex and the EVA copolymer latex.
- Preferably, the vulcanization agent includes sulfur, organic sulfide and a combination thereof, in amount of from 0.1% to 2% by weight based on the total weight of the base latex and the EVA copolymer latex.
- Preferably, the vulcanization agent includes at least one selected from a group consisting of zinc N-ethyl-N-phenyldithiocarbamate, zinc dimethyldithiocarbamate, zinc diethyldithiocarbamate, zinc dibutyldithiocarbamate, zinc mercaptobenzothiazole, tetramethyl disulfide and a combination thereof, in amount of from 0.5% to 10% by weight based on the total weight of the base latex and the EVA copolymer latex.
- Preferably, the anti-aging agent includes phenolic compounds or amine compounds, in amount of from 0.5% to 3% by weight based on the total weight of the base latex and the EVA copolymer latex.
- Preferably, the enforcement agent includes at least one selected from a group consisting of nano-scale montmorillonite, mica, clay, bentonite, saponite, silica, titanium dioxide, potassium titanate whisker and a combination thereof, in amount of less than 20% by weight based on the total weight of the base latex and the EVA copolymer latex.
- Preferably, the additive includes at least one selected from a group consisting of photocatalyst, talcum powder, calcium carbonate, titanium dioxide, antistatic agent, far infrared-ray emitting agent, pigment and a combination thereof, in amount of less than 20% by weight based on the total weight of the base latex and the EVA copolymer latex.
- Preferably, the additional latices include aqueous polyurethane, aqueous nitrile rubber latex, acrylic resin latex and a combination thereof, in amount of less than 50% by weight based on the total weight of the base latex and the EVA copolymer latex.
- In accordance with a second aspect of the present invention, there is provided a process for producing a glove having an interpenetrating network structure. Firstly, a mold is contacted with an elastomeric composition. The elastomeric composition includes a latex mixture comprising a base latex and a thermoplastic ethylene-vinylacetate (EVA) copolymer latex, wherein the base latex comprises a styrene-butadiene rubber (SBR) latex and a carboxylated styrene-butadiene rubber (C-SBR) latex, 1˜10 weight parts of an activator; 0.1˜2 weight parts of a vulcanization agent; and 0.5˜10 weight parts of a vulcanization accelerator. Then, the elastomeric composition on the mold is allowed to perform a vulcanization reaction, thereby forming the glove article having the interpenetrating network structure.
- In an embodiment, the composition further comprises 0.5˜3 weight parts of an anti-aging agent, optionally an enforcement agent less than 20 weight parts, optionally a filler less than 20 weight parts and optionally additional latices less than 50 weight parts.
- The above objects and advantages of the present invention will become more readily apparent to those ordinarily skilled in the art after reviewing the following detailed description.
- The objects of meeting the requirements of environmental protection and cost-effectiveness can be achieved by a method of the present invention for producing an elastomeric article having an interpenetrating network structure.
- The elastomeric composition of the present invention comprises a base latex and a thermoplastic ethylene-vinylacetate (EVA) copolymer latex. The base latex comprises at least one of a styrene-butadiene rubber (SBR) latex and a carboxylated styrene-butadiene rubber (C-SBR) latex. Some suitable additives, for example activators, vulcanization agents, vulcanization accelerators, anti-aging agents, enforcement agents, fillers and additional latices, can be combined into the elastomeric composition so as to impart desirable properties of the produced elastomeric articles. During a vulcanization process, the base latex and the EVA copolymer latex of the elastomeric composition are cross-linked to form the interpenetrating network structure of the elastomeric article having the interpenetrating network structure so as to impart excellent elastomeric properties such as elasticity and extensibility, as will be described hereinafter. More specifically, due to the excellent elasticity and extensibility, the elastomeric article produced from the elastomeric composition will generate different contractible degrees for the moving and motionless portions of the wearer. Thus, the wearer can feel the elastomeric article next to the skin.
- The carboxylated styrene-butadiene rubber (C-SBR) latex is obtained by introducing carboxylate groups into the molecule chains of SBR. The base latex comprises preferably from 1% to 40%, and more preferably from 5% to 20 % by mole of carboxylate groups. The presence of the C-SBR latex can provide good immersion molding effects of the produced elastomeric article and increase hydrogen-bond density of the SBR latex. The tensile stress and tear strength of the elastomeric article can be enhanced accordingly. The hydrogen bonding of C-SBR and/or SBR latex and EVA copolymer latex is increased during vulcanization so as to promote formation of the interpenetrating network structure. Furthermore, the EVA copolymer latex can also increase immersion molding effects of the produced elastomeric article, and thus provides good softness and touch feel.
- The above-mentioned base latex can be used alone or in a mixture of at least two C-SBR lattices with different carboxylate groups. In addition, the combination of the SBR latex and the C-SBR latex can be used. The mixing ratio of the base latex to the EVA copolymer latex is preferably from 99:1 to 5:95, and more preferably from 95:5 to 40:60.
- The activator used in the present invention may be zinc oxides, in amount of from 1% to 10% by weight based on the total weight of the base latex and the EVA copolymer latex.
- The vulcanization agent includes for example sulfur, organic sulfide and a combination thereof, in amount of from 0.1% to 2% by weight based on the total weight of the base latex and the EVA copolymer latex.
- The vulcanization agent is used to promote vulcanization reaction and can include for example zinc N-ethyl-N-phenyldithio-carbamate (PX), zinc dimethyldithiocarbamate (PZ), zinc diethyldithiocarbamate (EZ), zinc dibutyldithiocarbamate (BZ), zinc mercaptobenzothiazole (MZ), tetramethyl disulfide and a combination thereof, in amount of from 0.5% to 10% by weight based on the total weight of the base latex and the EVA copolymer latex.
- The anti-aging agent may be phenolic compounds or amine compounds, in amount of from 0.5% to 3% by weight based on the total weight of the base latex and the EVA copolymer latex.
- The enforcement agent used in the present invention includes for example nano-scale montmorillonite, mica, clay, bentonite, saponite, silica, titanium dioxide, potassium titanate whisker and a combination thereof, in amount of less than 20% by weight based on the total weight of the base latex and the EVA copolymer latex.
- The additive used in the present invention includes for example photocatalyst, talcum powder, calcium carbonate, titanium dioxide, antistatic agent, far infrared-ray emitting agent, pigment and a combination thereof, in amount of less than 20% by weight based on the total weight of the base latex and the EVA copolymer latex.
- The additional latices can include for example aqueous polyurethane, aqueous nitrile rubber (NBR) latex, acrylic resin latex and a combination thereof, in amount of less than 50% by weight based on the total weight of the base latex and the EVA copolymer latex.
- The additives described hereinbefore can be incorporated into the elastomeric composition of the present invention in combination with a dispersing agent so as to increase dispersing effect thereof. Depending on the types of additives, such dispersing agents can be any suitable surfactant in amount of from 0.3% to 1% by weight based on the weight of the additive to be used.
- A process for producing a glove will be described as follows. Firstly, a glove mold is immersed in a solution of a coagulant comprising calcium nitrate, calcium chloride, alky ammonium or a combination thereof. After the coagulant is precipitated from the solution, the glove mold is removed and dried. Then, the glove mold is immersed in an elastomeric composition of the present invention, removed and dried. Optionally, the glove mold is surface-treated by using a surface-treating agent comprising 10˜20% by weight of a synthesized resin, 10˜20% by weight of an acrylic-styrene resin, 1˜10% by weight of a silicon resin and the balance of water. Then, the elastomeric composition on the surface-treated glove mold is vulcanized at a temperature between 90 and 180° C. for several minutes to several hundred minutes. After the vulcanized elastomeric composition is cooled and demolded, a glove having an interpenetrating network structure is formed.
- The present invention will be further understood in more details with reference to the following examples.
- Four elastomeric compositions are prepared by the components indicated in Table 1 below, each component being represented by weight parts.
TABLE 1 Example# Component 1 2 3 4 SBR 100 0 40 50 C-SBR* 0 100 60 50 EVA 20 10 12 15 Sulfur 0.6 0.6 0.6 0.6 Zinc oxide 2 2 2 2 PX** 2 2 2 2 nano-scale clay 6 6 6 6 aqueous nitrile rubber 10 10 10 10 latex water 20 20 20 20
*comprising 10% by mole of carboxylate group
**zinc N-ethyl-N-phenyldithiocarbamate
- Four sets of glove molds are immersed in an aqueous solution containing 0.5˜35% by weight of calcium nitrate. After calcium nitrate is precipitated from the solution, the glove mold is removed and dried. Then, the four sets of glove molds are immersed in the elastomeric compositions of the examples 1˜4, respectively. Then, these glove molds are removed and dried. Optionally, the glove mold is surface-treated by using a surface-treating agent comprising 15% by weight of a synthesized resin, 15% by weight of an acrylic-styrene resin, 4% by weight of a silicon resin and 66% by weight of water. Then, the elastomeric composition on the surface-treated glove mold is vulcanized at a temperature of 150° C. for 15 minutes. After the vulcanized elastomeric compositions are cooled and demolded, gloves having interpenetrating network structures are formed.
- Table 2 shows the test results of physical properties of the gloves produced in the examples 1˜4.
TABLE 2 Example# Physical properties 1 2 3 4 Ultimate tensile stress (MPa) 20.3 23.3 21.9 20.5 Ultimate elongation (%) 560 740 680 620 Tensile stress @ 100% (MPa) 1.03 1.18 1.10 1.06 Tensile stress @ 200% (MPa) 1.90 2.27 2.11 2.03 Tensile stress @ 300% (MPa) 2.87 3.38 3.22 3.12 Tensile stress @ 400% (MPa) 4.67 5.13 5.01 4.88 Tensile stress @ 500% (MPa) 5.77 7.70 7.12 6.99 - The results of Table 2 show that the gloves produced by using the elastomeric compositions of the present invention have excellent tensile stress and elongation. Thus, good softness and touch feel can be provided to the wearer.
- The combustion tests of the above gloves are performed to measure acidity of the combusted gases and contents of dioxin.
- The results of the combustion tests show that the acidities of the combusted gases have pH values between 4.0 and 4.6, and the dioxin content is approximately 0 ng/g. In contrast, the acidities of the combusted gases for a commercial PVC glove is about pH 2.0, and the dioxin content is about 25 ng/g.
- The above results show the gloves produced by using the elastomeric compositions of the present invention have superior environmental protection effects.
- While the invention has been described in terms of what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention needs not be limited to the disclosed embodiment. On the contrary, it is intended to cover various modifications and similar arrangements included within the spirit and scope of the appended claims which are to be accorded with the broadest interpretation so as to encompass all such modifications and similar structures.
Claims (16)
1. A process for producing a glove having an interpenetrating network structure, comprising steps of:
contacting a mold with an elastomeric composition comprising a base latex and a thermoplastic ethylene-vinylacetate (EVA) copolymer latex, said base latex comprising a styrene-butadiene rubber (SBR) latex and a carboxylated styrene-butadiene rubber (C-SBR) latex and the mixing ratio of said base latex to said EVA copolymer latex being from 95:5 to 40:60; and
allowing said elastomeric composition on said mold to perform a vulcanization reaction, thereby forming said elastomeric article having said interpenetrating network structure.
2. The process according to claim 1 wherein said base latex comprises from 1% to 40% by mole of carboxylate group.
3. The process according to claim 2 wherein said base latex comprises from 5% to 20 % by mole of carboxylate group.
4. The process according to claim 1 wherein said elastomeric composition comprises at least one additive selected from a group consisting of activators, vulcanization agents, vulcanization accelerators, anti-aging agents, enforcement agents, fillers and additional latices.
5. The process according to claim 4 wherein said activator includes zinc oxides, in amount of from 1% to 10% by weight based on the total weight of said base latex and said EVA copolymer latex.
6. The process according to claim 4 wherein said vulcanization agent includes sulfur, organic sulfide and a combination thereof, in amount of from 0.1% to 2% by weight based on the total weight of said base latex and said EVA copolymer latex.
7. The process according to claim 4 wherein said vulcanization agent includes at least one selected from a group consisting of zinc N-ethyl-N-phenyldithiocarbamate, zinc dimethyldithiocarbamate, zinc diethyldithiocarbamate, zinc dibutyldithiocarbamate, zinc mercaptobenzothiazole, tetramethyl disulfide and a combination thereof, in amount of from 0.5% to 10% by weight based on the total weight of said base latex and said EVA copolymer latex.
8. The process according to claim 4 wherein said anti-aging agent includes phenolic compounds or amine compounds, in amount of from 0.5% to 3% by weight based on the total weight of said base latex and said EVA copolymer latex.
9. The process according to claim 4 wherein said enforcement agent is a nano-scale enforcement agent including at least one selected from a group consisting of montmorillonite, mica, clay, bentonite, saponite, silica, titanium dioxide, potassium titanate whisker and a combination thereof, in amount of less than 20% by weight based on the total weight of said base latex and said EVA copolymer latex.
10. The process according to claim 4 wherein said additive includes at least one selected from a group consisting of photocatalyst, talcum powder, calcium carbonate, titanium dioxide, antistatic agent, far infrared-ray emitting agent, pigment and a combination thereof, in amount of less than 20% by weight based on the total weight of said base latex and said EVA copolymer latex.
11. The process according to claim 4 wherein said additional latices include aqueous polyurethane, aqueous nitrile rubber latex, acrylic resin latex and a combination thereof, in amount of less than 50% by weight based on the total weight of said base latex and said EVA copolymer latex.
12. The process according to claim 1 further comprising a step of immersing said mold into a solution of a coagulant selected from a group consisting of calcium nitrate, calcium chloride, alky ammonium and a combination thereof, before said step of contacting said mold with said elastomeric composition.
13. The process according to claim 1 further comprising a step of surface-treating said mold after said step of contacting said mold with said elastomeric composition and before said vulcanization reaction is performed.
14. The process according to claim 13 wherein said step of surface-treating said mold is performed by using a surface-treating agent comprising 10˜20% by weight of a synthesized resin, 10˜20% by weight of an acrylic-styrene resin, 1˜10% by weight of a silicon resin and the balance of water.
15. A process for producing a glove having an interpenetrating network structure, comprising steps of:
contacting a mold with an elastomeric composition, wherein said elastomeric composition comprises:
100 weight parts of a latex mixture comprising a base latex and a thermoplastic ethylene-vinylacetate (EVA) copolymer latex, said base latex comprising a styrene-butadiene rubber (SBR) latex and a carboxylated styrene-butadiene rubber (C-SBR) latex and the mixing ratio of said base latex to said EVA copolymer latex being from 99:1 to 5:95;
1˜10 weight parts of an activator, based on the total weight of said latex mixture;
0.1˜2 weight parts of a vulcanization agent, based on the total weight of said latex mixture; and
0.5˜10 weight parts of a vulcanization accelerator, based on the total weight of said latex mixture; and
allowing said elastomeric composition on said mold to perform a vulcanization reaction, thereby forming said glove having said interpenetrating network structure.
16. The process according to claim 15 wherein said elastomeric composition further comprises:
0.5˜3 weight parts of an anti-aging agent, based on the total weight of said latex mixture;
optionally an enforcement agent less than 20 weight parts based on the total weight of said latex mixture;
optionally a filler less than 20 weight parts based on the total weight of said latex mixture; and
optionally additional latices less than 50 weight parts based on the total weight of said latex mixture.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/265,469 US20060052501A1 (en) | 2003-04-25 | 2005-11-02 | Process for producing glove having interpenetrating network structure |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW092109667A TW593511B (en) | 2003-04-25 | 2003-04-25 | An interpenetrating network elastomeric composition and process for producing gloves by using such composition |
TW092109667 | 2003-04-25 | ||
US10/447,723 US7001941B2 (en) | 2003-04-25 | 2003-05-29 | Elastomeric composition and process for producing glove having interpenetrating network structure |
US11/265,469 US20060052501A1 (en) | 2003-04-25 | 2005-11-02 | Process for producing glove having interpenetrating network structure |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/447,723 Division US7001941B2 (en) | 2003-04-25 | 2003-05-29 | Elastomeric composition and process for producing glove having interpenetrating network structure |
Publications (1)
Publication Number | Publication Date |
---|---|
US20060052501A1 true US20060052501A1 (en) | 2006-03-09 |
Family
ID=33297682
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/447,723 Expired - Fee Related US7001941B2 (en) | 2003-04-25 | 2003-05-29 | Elastomeric composition and process for producing glove having interpenetrating network structure |
US11/265,469 Abandoned US20060052501A1 (en) | 2003-04-25 | 2005-11-02 | Process for producing glove having interpenetrating network structure |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/447,723 Expired - Fee Related US7001941B2 (en) | 2003-04-25 | 2003-05-29 | Elastomeric composition and process for producing glove having interpenetrating network structure |
Country Status (4)
Country | Link |
---|---|
US (2) | US7001941B2 (en) |
JP (1) | JP2004324034A (en) |
MY (1) | MY138110A (en) |
TW (1) | TW593511B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070098099A1 (en) * | 2005-10-27 | 2007-05-03 | Qualcomm, Incorporated | Precoding for segment sensitive scheduling in wireless communication systems |
WO2014053037A1 (en) * | 2012-10-02 | 2014-04-10 | Braskem S.A. | Non-expanded elastomer composition based on ethylene-vinyl acetate copolymer, and use thereof for manufacturing footwear |
CN106432828A (en) * | 2016-11-17 | 2017-02-22 | 无锡市长安曙光手套厂 | Desensitizing latex glove material |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4729887B2 (en) * | 2004-04-21 | 2011-07-20 | ユニマテック株式会社 | Acrylic elastomer composition |
MY154903A (en) * | 2006-06-21 | 2015-08-28 | Top Glove Sdn Bhd | Nitrile glove |
CN101104712B (en) * | 2006-07-14 | 2010-04-21 | 浙江三力士橡胶股份有限公司 | Nano material modified rubber V strip |
KR100891297B1 (en) | 2008-01-15 | 2009-04-06 | 한국신발피혁연구소 | Reducing cure times rubber composition having storage stability excellent and method for producing of the same |
US7928156B2 (en) * | 2008-06-27 | 2011-04-19 | Sabic Innovative Plastics Ip B.V. | Nanocomposite comprising exfoliated nanoclay-styrenic concentrate and methods of preparation |
CN102134339B (en) * | 2011-04-15 | 2012-12-26 | 刘立文 | Calcium sulfate whisker modified butadiene styrene rubber composite and preparation process thereof |
CN103140348B (en) * | 2011-09-12 | 2015-05-13 | 住友理工株式会社 | Method for producing hose with protector layer |
CN102585339A (en) * | 2011-12-13 | 2012-07-18 | 陕西科技大学 | Ultralight EVA (ethylene-vinyl acetate)/MMT (montmorillonite)/SA (stearic acid) composite foaming material and preparation method thereof |
KR101599583B1 (en) * | 2013-08-29 | 2016-03-03 | 주식회사 엘지화학 | Carboxylic acid modified-nitrile based copolymer latex composition and dip-forming comprising the same |
CN108368307A (en) * | 2017-10-09 | 2018-08-03 | 阿瓦迪亚·穆都萨米 | Biodegradable elastomer film composition and its production method |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3411982A (en) * | 1964-03-18 | 1968-11-19 | Uniroyal Inc | Elastomeric article having a slip coating |
US3779799A (en) * | 1970-06-12 | 1973-12-18 | Thiokol Chemical Corp | Coated woven textile product and process therefor |
US4070713A (en) * | 1976-03-17 | 1978-01-31 | Arbrook, Inc. | Medical glove and method |
US4082862A (en) * | 1975-06-24 | 1978-04-04 | Sutures Inc. | Process for the production of rubber articles having improved slip coating |
US5084514A (en) * | 1990-11-14 | 1992-01-28 | Reichhold Chemicals, Inc. | Latex gloves with improved donnability |
US5284157A (en) * | 1991-07-26 | 1994-02-08 | Ortho Pharmaceutical Corporation | Elastomeric film products with improved chemical resistance |
US5851683A (en) * | 1993-03-01 | 1998-12-22 | Allegiance Corporation | Sequential copolymer based gloves |
US6187865B1 (en) * | 1998-12-16 | 2001-02-13 | Ludlow Composites Corporation | Rubber compositions and laminates thereof |
US20020066529A1 (en) * | 2000-10-17 | 2002-06-06 | Teturo Tanno | Aqueous emulsion composition, method of backing carpet, and carpet |
US20050031884A1 (en) * | 2000-11-28 | 2005-02-10 | Kazuo Koide | Latex products |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55163202A (en) | 1979-05-31 | 1980-12-19 | Dainichiseika Color Chem | Production of working hand glove with excellent drapability |
JPH05306383A (en) | 1992-04-30 | 1993-11-19 | Dainippon Ink & Chem Inc | Adhesive for decorative processing of veneer |
JPH0956748A (en) * | 1995-08-30 | 1997-03-04 | Oji Paper Co Ltd | Absorptive article |
JPWO2002044262A1 (en) * | 2000-11-28 | 2004-04-02 | 株式会社鈴木ラテックス | Latex products |
-
2003
- 2003-04-25 TW TW092109667A patent/TW593511B/en not_active IP Right Cessation
- 2003-05-29 US US10/447,723 patent/US7001941B2/en not_active Expired - Fee Related
- 2003-08-28 JP JP2003305259A patent/JP2004324034A/en active Pending
- 2003-09-16 MY MYPI20033513A patent/MY138110A/en unknown
-
2005
- 2005-11-02 US US11/265,469 patent/US20060052501A1/en not_active Abandoned
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3411982A (en) * | 1964-03-18 | 1968-11-19 | Uniroyal Inc | Elastomeric article having a slip coating |
US3779799A (en) * | 1970-06-12 | 1973-12-18 | Thiokol Chemical Corp | Coated woven textile product and process therefor |
US4082862A (en) * | 1975-06-24 | 1978-04-04 | Sutures Inc. | Process for the production of rubber articles having improved slip coating |
US4070713A (en) * | 1976-03-17 | 1978-01-31 | Arbrook, Inc. | Medical glove and method |
US5084514A (en) * | 1990-11-14 | 1992-01-28 | Reichhold Chemicals, Inc. | Latex gloves with improved donnability |
US5284157A (en) * | 1991-07-26 | 1994-02-08 | Ortho Pharmaceutical Corporation | Elastomeric film products with improved chemical resistance |
US5851683A (en) * | 1993-03-01 | 1998-12-22 | Allegiance Corporation | Sequential copolymer based gloves |
US6187865B1 (en) * | 1998-12-16 | 2001-02-13 | Ludlow Composites Corporation | Rubber compositions and laminates thereof |
US20020066529A1 (en) * | 2000-10-17 | 2002-06-06 | Teturo Tanno | Aqueous emulsion composition, method of backing carpet, and carpet |
US20050031884A1 (en) * | 2000-11-28 | 2005-02-10 | Kazuo Koide | Latex products |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070098099A1 (en) * | 2005-10-27 | 2007-05-03 | Qualcomm, Incorporated | Precoding for segment sensitive scheduling in wireless communication systems |
KR100969845B1 (en) | 2005-10-27 | 2010-07-13 | 퀄컴 인코포레이티드 | Precoding for segment sensitive scheduling in wireless communication systems |
US8639190B2 (en) | 2005-10-27 | 2014-01-28 | Qualcomm Incorporated | Precoding for segment sensitive scheduling in wireless communication systems |
US8971823B2 (en) | 2005-10-27 | 2015-03-03 | Qualcomm Incorporated | Precoding for segment sensitive scheduling in wireless communication systems |
WO2014053037A1 (en) * | 2012-10-02 | 2014-04-10 | Braskem S.A. | Non-expanded elastomer composition based on ethylene-vinyl acetate copolymer, and use thereof for manufacturing footwear |
CN106432828A (en) * | 2016-11-17 | 2017-02-22 | 无锡市长安曙光手套厂 | Desensitizing latex glove material |
Also Published As
Publication number | Publication date |
---|---|
TW593511B (en) | 2004-06-21 |
JP2004324034A (en) | 2004-11-18 |
US7001941B2 (en) | 2006-02-21 |
TW200422340A (en) | 2004-11-01 |
MY138110A (en) | 2009-04-30 |
US20040214940A1 (en) | 2004-10-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20060052501A1 (en) | Process for producing glove having interpenetrating network structure | |
US8273810B2 (en) | Polyisoprene articles and process for making the same | |
US6673871B2 (en) | Elastomeric articles made from a synthetic polymer | |
KR101434814B1 (en) | Nitrile rubber article having natural rubber characteristics | |
CN101243129B (en) | Latex accelerator composition | |
EP0658176B1 (en) | Rubber compositions containing epoxidized natural rubber and natural rubber | |
CN105722908A (en) | Polymeric compositions comprising polyisoprene | |
JPH0391501A (en) | Rubber product and curing system | |
EP1482009B1 (en) | Elastromeric composition and process for producing glove having interpenetrating network structure | |
JP2000044757A (en) | Vulcanizable rubber composition for seal and seal | |
JP4350831B2 (en) | gloves | |
JP2001192918A (en) | Rubber glove | |
JPH06256572A (en) | Nbr composition | |
JPH06256603A (en) | Rubber composition | |
JP2002309043A (en) | Rubber latex composition and glove using the same | |
US20090176088A1 (en) | Nitrile glove | |
JP2002020915A (en) | Glove and method for producing the same | |
WO2023234491A1 (en) | Latex composition for dip molding, preparation method therefor and dip-molded product produced therefrom | |
US20210292523A1 (en) | Rubber glove | |
JP2004331986A (en) | CHLOROSULFONATED ETHYLENE/alpha-OLEFIN COPOLYMER COMPOSITION AND BOOT FOR JOINT USING THIS COPOLYMER COMPOSITION | |
JPH0333189B2 (en) |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |