CN115960429B - Latex glove coating, medical grade latex glove and preparation method thereof - Google Patents
Latex glove coating, medical grade latex glove and preparation method thereof Download PDFInfo
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- CN115960429B CN115960429B CN202211699248.2A CN202211699248A CN115960429B CN 115960429 B CN115960429 B CN 115960429B CN 202211699248 A CN202211699248 A CN 202211699248A CN 115960429 B CN115960429 B CN 115960429B
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- 239000004816 latex Substances 0.000 title claims abstract description 162
- 229920000126 latex Polymers 0.000 title claims abstract description 162
- 238000000576 coating method Methods 0.000 title claims abstract description 127
- 239000011248 coating agent Substances 0.000 title claims abstract description 125
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 56
- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 33
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 33
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 31
- 239000000080 wetting agent Substances 0.000 claims abstract description 26
- 239000002562 thickening agent Substances 0.000 claims abstract description 20
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 16
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 10
- 239000000839 emulsion Substances 0.000 claims description 65
- 239000000758 substrate Substances 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 25
- 239000003999 initiator Substances 0.000 claims description 23
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 21
- 239000013530 defoamer Substances 0.000 claims description 16
- 239000002585 base Substances 0.000 claims description 14
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 13
- 239000003513 alkali Substances 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 13
- 229920001296 polysiloxane Polymers 0.000 claims description 13
- 238000005406 washing Methods 0.000 claims description 13
- 239000003085 diluting agent Substances 0.000 claims description 12
- 238000004945 emulsification Methods 0.000 claims description 12
- 238000002791 soaking Methods 0.000 claims description 12
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 11
- 229920000570 polyether Polymers 0.000 claims description 11
- 239000003995 emulsifying agent Substances 0.000 claims description 10
- 239000000178 monomer Substances 0.000 claims description 10
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 9
- -1 amine persulfate Chemical class 0.000 claims description 9
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 9
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 8
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 8
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 8
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 8
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 229920002379 silicone rubber Polymers 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 6
- 229920002845 Poly(methacrylic acid) Polymers 0.000 claims description 6
- 238000007598 dipping method Methods 0.000 claims description 6
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 5
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- UEEJHVSXFDXPFK-UHFFFAOYSA-N N-dimethylaminoethanol Chemical compound CN(C)CCO UEEJHVSXFDXPFK-UHFFFAOYSA-N 0.000 claims description 3
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 claims description 3
- CBTVGIZVANVGBH-UHFFFAOYSA-N aminomethyl propanol Chemical compound CC(C)(N)CO CBTVGIZVANVGBH-UHFFFAOYSA-N 0.000 claims description 3
- 229960002887 deanol Drugs 0.000 claims description 3
- 239000012972 dimethylethanolamine Substances 0.000 claims description 3
- 150000002009 diols Chemical class 0.000 claims description 3
- VVSMKOFFCAJOSC-UHFFFAOYSA-L disodium;dodecylbenzene;sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O.CCCCCCCCCCCCC1=CC=CC=C1 VVSMKOFFCAJOSC-UHFFFAOYSA-L 0.000 claims description 3
- 229910000403 monosodium phosphate Inorganic materials 0.000 claims description 3
- 235000019799 monosodium phosphate Nutrition 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 235000017281 sodium acetate Nutrition 0.000 claims description 3
- 239000001632 sodium acetate Substances 0.000 claims description 3
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 claims description 3
- 150000001345 alkine derivatives Chemical class 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000013329 compounding Methods 0.000 claims 1
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 2
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
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- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 description 2
- DXPPIEDUBFUSEZ-UHFFFAOYSA-N 6-methylheptyl prop-2-enoate Chemical compound CC(C)CCCCCOC(=O)C=C DXPPIEDUBFUSEZ-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
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- AWFYPPSBLUWMFQ-UHFFFAOYSA-N 2-[5-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]-1,3,4-oxadiazol-2-yl]-1-(1,4,6,7-tetrahydropyrazolo[4,3-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C1=NN=C(O1)CC(=O)N1CC2=C(CC1)NN=C2 AWFYPPSBLUWMFQ-UHFFFAOYSA-N 0.000 description 1
- LLQHSBBZNDXTIV-UHFFFAOYSA-N 6-[5-[[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]methyl]-4,5-dihydro-1,2-oxazol-3-yl]-3H-1,3-benzoxazol-2-one Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)CC1CC(=NO1)C1=CC2=C(NC(O2)=O)C=C1 LLQHSBBZNDXTIV-UHFFFAOYSA-N 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
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- KVNRLNFWIYMESJ-UHFFFAOYSA-N butyronitrile Chemical compound CCCC#N KVNRLNFWIYMESJ-UHFFFAOYSA-N 0.000 description 1
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- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
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- Paints Or Removers (AREA)
Abstract
The invention provides a latex glove coating, a medical grade latex glove and a preparation method thereof, belonging to the technical field of functional reagents. The latex glove coating comprises the following components in parts by mass: 30-50 parts of anion modified acrylic resin; 1-2 parts of defoaming agent; 2-8 parts of slipping auxiliary agent; 2-10 parts of matte auxiliary agent; 4-7 parts of a thickening agent; 0.5 to 1 part of pH regulator; 2-8 parts of wetting agent; 48-60 parts of water. The invention adopts the anionic modified acrylic resin, hydrophilic groups react to form a compact reticular structure when the acrylic resin is formed into a film, so that a coating on the surface of the latex glove has better water resistance and high temperature resistance, and the coating has stable performance and is not easy to fall off; the slipping auxiliary agent and the matte auxiliary agent are added into the latex glove coating provided by the invention, so that the coating on the surface of the latex glove has the characteristics of high slipping and high matte. The latex glove coating provided by the invention is low in cost and suitable for large-scale production and application.
Description
Technical Field
The invention relates to the technical field of functional reagents, in particular to latex glove coating and medical grade latex glove and a preparation method thereof.
Background
The medical protective glove is used as the only hand isolation protective article, plays a role in bidirectional isolation protection, does not have a substitute product at present, and has large use amount in places with dense people flow such as hospitals, markets, public transportation and the like.
The disposable medical protective glove can be divided into PVC gloves, butyronitrile gloves and latex gloves according to materials, wherein medical grade latex glove products belong to high-end products in health protective gloves, are mainly used for industries with higher requirements on protection, dust prevention, chemical resistance, oil resistance, mechanical protection and the like, and are mainstream medical glove materials.
At present, the domestic medical grade latex glove production factories mainly use imported latex glove paint to form a coating on the surface of a glove substrate, the imported latex glove paint has higher price, the formed coating has insufficient smoothness and matt degree, and the coating is easy to fall off after high-temperature soaking and washing.
Disclosure of Invention
The invention aims to provide a latex glove coating, a medical grade latex glove and a preparation method thereof.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a latex glove coating which comprises the following components in parts by mass:
30-50 parts of anion modified acrylic resin;
1-2 parts of defoaming agent;
2-8 parts of slipping auxiliary agent;
2-10 parts of matte auxiliary agent;
4-7 parts of a thickening agent;
0.5 to 1 part of pH regulator;
2-8 parts of wetting agent;
48-60 parts of water.
Preferably, the preparation method of the anion modified acrylic resin comprises the following steps:
mixing an acrylic acid monomer, an emulsifier and water, and performing pre-emulsification treatment to obtain a pre-emulsion;
mixing an aqueous alkali reagent solution with a first initiator, and adding part of pre-emulsion into the obtained mixture to obtain seed emulsion;
adding the residual pre-emulsion and a second initiator into the seed emulsion, and performing emulsification treatment to obtain emulsion;
and regulating the pH value of the emulsion to 7-8 to obtain the anion modified acrylic resin.
Preferably, the acrylic monomer comprises one or more of acrylamide, methyl methacrylate, butyl acrylate, hydroxyethyl acrylate, methacrylic acid, acrylic acid and isooctyl acrylate;
the emulsifier comprises sodium dodecyl benzene sulfate and/or propylene glycol block polyether;
the alkali reagent in the alkali reagent aqueous solution is one or more of sodium bicarbonate, sodium dihydrogen phosphate and sodium acetate;
the initiator comprises potassium persulfate and/or amine persulfate;
the reagent used for adjusting the emulsion is ammonia water.
Preferably, the defoamer comprises a silicone-based defoamer and/or a polyether-based defoamer.
Preferably, the slip aid comprises an ultra-high molecular weight silicone dispersion and silicone elastomer microparticles, wherein the mass ratio of the ultra-high molecular weight silicone dispersion to the silicone elastomer microparticles is 3: (1-3).
Preferably, the matting aid comprises one or more of an aqueous matting wax, a powder grade synthetic silica and a matting resin.
Preferably, the thickener comprises a modified polymethacrylic acid emulsion thickener and/or an associative polyurethane thickener;
the pH regulator comprises one or more of dimethylethanolamine, triethylamine and AMP95 auxiliary agent;
the wetting agent comprises an organosilicon wetting agent and/or an alkyne diol ether wetting agent.
The invention provides a medical grade latex glove, which comprises a latex glove substrate and a coating attached to the surface of the latex glove substrate, wherein the preparation raw materials of the coating comprise the latex glove coating according to the technical scheme.
The invention provides a preparation method of the medical grade latex glove, which comprises the following steps:
preparing a latex glove substrate by using a hand model, and placing the latex glove substrate into a diluent of a latex glove coating for dipping treatment to obtain a dipped latex glove substrate;
and baking the dipped latex glove base material, forming a coating on the surface of the latex glove base material, and soaking and washing with hot water after demolding to obtain the medical grade latex glove.
Preferably, the dilution of the latex glove coating is prepared from the latex glove coating and water according to the mass ratio of 1: (8-15) mixing the materials in proportion;
the temperature of the dipping treatment is 20-50 ℃ and the time is 3-5 s;
the temperature of the hot water is 60-80 ℃, and the soaking and washing time is 1-4 h.
The invention provides a latex glove coating which comprises the following components in parts by mass: 30-50 parts of anion modified acrylic resin; 1-2 parts of defoaming agent; 2-8 parts of slipping auxiliary agent; 2-10 parts of matte auxiliary agent; 4-7 parts of a thickening agent; 0.5 to 1 part of pH regulator; 2-8 parts of wetting agent; 48-60 parts of water. The invention adopts the anionic modified acrylic resin, hydrophilic groups (such as carboxyl) react to form a compact reticular structure when the acrylic resin is formed into a film, so that the coating on the surface of the latex glove has better water resistance and high temperature resistance, and the coating has stable performance and is not easy to fall off; the slipping auxiliary agent and the matte auxiliary agent are added into the latex glove coating provided by the invention, so that the coating on the surface of the latex glove has the characteristics of high slipping and high matte. The latex glove coating provided by the invention is low in cost and suitable for large-scale production and application.
Drawings
FIG. 1 is an electron micrograph (2000 times) of a medical grade latex glove middle coating prepared using the latex glove coating of example 4;
FIG. 2 is an electron micrograph (10000X) of a medical grade latex glove middle coating prepared using the latex glove coating of example 4;
FIG. 3 is an electron micrograph (2000 times) of a medical grade latex glove middle coating prepared with an import latex glove coating;
FIG. 4 is an electron micrograph (10000X) of a medical grade latex glove middle coating prepared using an import latex glove coating.
Detailed Description
The invention provides a latex glove coating which comprises the following components in parts by mass:
30-50 parts of anion modified acrylic resin;
1-2 parts of defoaming agent;
2-8 parts of slipping auxiliary agent;
2-10 parts of matte auxiliary agent;
4-7 parts of a thickening agent;
0.5 to 1 part of pH regulator;
2-8 parts of wetting agent;
48-60 parts of water.
In the present invention, the raw materials used are commercially available products well known to those skilled in the art unless specified otherwise.
The latex glove coating comprises 30-50 parts by mass of anionic modified acrylic resin, preferably 30-40 parts by mass, and more preferably 30-35 parts by mass. Compared with common acrylic resin, the invention adopts the anionic modified acrylic resin, hydrophilic groups (such as carboxyl) react to form a compact network structure when the acrylic resin is formed into a film, and the coating on the surface of the latex glove has better water resistance and high temperature resistance. In the present invention, the preparation method of the anionically modified acrylic resin preferably comprises the steps of:
mixing an acrylic acid monomer, an emulsifier and water, and performing pre-emulsification treatment to obtain a pre-emulsion;
mixing an aqueous alkali reagent solution with a first initiator, and adding part of pre-emulsion into the obtained mixture to obtain seed emulsion;
adding the residual pre-emulsion and a second initiator into the seed emulsion, and performing emulsification treatment to obtain emulsion;
and regulating the pH value of the emulsion to 7-8 to obtain the anion modified acrylic resin.
The invention mixes acrylic acid monomer, emulsifier and water to pre-emulsify, and gets the pre-emulsion. In the present invention, the acrylic monomer preferably includes one or more of acrylamide, methyl methacrylate, butyl acrylate, hydroxyethyl acrylate, methacrylic acid, acrylic acid and isooctyl acrylate, more preferably butyl acrylate, methyl methacrylate, methacrylic acid and acrylamide are compounded; when the acrylic monomer is butyl acrylate, methyl methacrylate, methacrylic acid and acrylamide, the mass ratio of butyl acrylate, methyl methacrylate, methacrylic acid and acrylamide is preferably (2-20): (10-50): (2-10): (1 to 5), more preferably (5 to 10): (15-30): (3-5): (1 to 3), more preferably (5 to 8): (17-23): (3-4): (1-2). In the present invention, the emulsifier preferably includes sodium dodecyl benzene sulfate (SDS) and/or propylene glycol block polyether, more preferably SDS and propylene glycol block polyether; when the emulsifier is SDS and propylene glycol block polyether, the mass ratio of the SDS and the propylene glycol block polyether is preferably (2-5): (5 to 7), more preferably (3 to 5): (5-6). In the invention, the mass ratio of the acrylic monomer, the emulsifier and the water is preferably 40: (12-18): (3.0 to 3.5), more preferably 40: (13-15): (3.2-3.4). In the present invention, the temperature of the pre-emulsification treatment is preferably 20 to 30 ℃, more preferably room temperature (25 ℃); the time is preferably 25 to 35min, more preferably 30min; the pre-emulsification treatment is preferably carried out under stirring conditions, and the stirring speed is preferably 800 to 1200rpm, more preferably 1000rpm.
After obtaining the pre-emulsion, the invention mixes the alkali agent aqueous solution with the first initiator, and adds part of the pre-emulsion into the obtained mixture to obtain the seed emulsion. In the invention, the alkali agent in the alkali agent aqueous solution is preferably one or more of sodium bicarbonate, sodium dihydrogen phosphate and sodium acetate; the concentration of the aqueous alkali reagent solution is preferably 3.7 to 4.2wt%, more preferably 3.9wt%. In the present invention, the first initiator preferably includes potassium persulfate and/or amine persulfate, and the first initiator is preferably used in the form of an aqueous first initiator solution having a concentration of preferably 28 to 32wt%, more preferably 30wt%. In the present invention, the partial pre-emulsion is preferably 1.8 to 2.2% by mass of the total mass of the pre-emulsion, more preferably 2%. In the present invention, the mass ratio of the alkali agent, the first initiator, and the partial pre-emulsion is preferably (0.8 to 3.2): (0.08-0.12): 1.2, more preferably 3:0.1:1.2. The invention preferably heats the alkali agent water solution to 70-80 ℃, then adds the first initiator water solution, and then drops the partial pre-emulsion to obtain the seed emulsion. In the present invention, the dropping rate of the partial pre-emulsion is preferably 0.07 to 0.09g/min, more preferably 0.08g/min. After the partial pre-emulsion is added dropwise, the invention preferably keeps the temperature of the obtained system for 25-35 min, more preferably keeps the temperature of the obtained system for 30min, and the seed emulsion is obtained.
After the seed emulsion is obtained, the invention adds the residual pre-emulsion and the second initiator into the seed emulsion to carry out emulsification treatment to obtain emulsion. In the present invention, the second initiator preferably includes potassium persulfate and/or amine persulfate, and the second initiator is preferably used in the form of an aqueous second initiator solution having a concentration of preferably 8 to 12wt%, more preferably 10wt%. In the present invention, the mass ratio of the second initiator to the first initiator is preferably 1: (0.8), more preferably 1:1. The present invention preferably simultaneously drops the remaining pre-emulsion and the second aqueous initiator solution into the seed emulsion; the dripping rate of the residual pre-emulsion is preferably 0.3-0.6 g/min, more preferably 0.4-0.5 g/min; the dropping rate of the second initiator aqueous solution is preferably 0.002 to 0.01g/min, more preferably 0.005 to 0.008g/min. In the present invention, the temperature of the emulsification treatment is preferably 70 to 80 ℃, more preferably 75 ℃; the time is preferably 0.5 to 1.5 hours, more preferably 1 hour; the time of the emulsification treatment is counted from the end of the dripping of the residual pre-emulsion and the second initiator aqueous solution.
After the emulsion is obtained, the pH value of the emulsion is regulated to 7-8, and the anionic modified acrylic resin is obtained. The invention preferably reduces the temperature of the emulsion and then adjusts the pH value; the temperature reduction is preferably to reduce the emulsion to 40 to 50 ℃, more preferably 45 ℃. In the present invention, the agent used for adjusting the emulsion is preferably aqueous ammonia, and the concentration of the aqueous ammonia is preferably 80wt%; the pH is preferably 7.4 to 7.6, more preferably 7.54.
After the pH value of the emulsion is regulated to 7-8, the invention preferably filters the obtained system to remove impurities, thus obtaining the anion modified acrylic resin.
Based on the mass parts of the anionic modified acrylic resin, the latex glove coating comprises 1 to 2 parts of defoamer, preferably 1 to 1.5 parts. In the present invention, the antifoaming agent preferably includes one or more of silicone-based antifoaming agents and/or polyether-based antifoaming agents. In the present invention, the silicone-based antifoaming agent is preferably a TSA-630 antifoaming agent, and the polyether-based antifoaming agent is preferably a BYK054 antifoaming agent. In an embodiment of the present invention, the silicone-based defoamer is specifically available from Jiangsu Teng Assistant Co., ltd, commercially available under the model number TSA-630.
Based on the mass parts of the anionic modified acrylic resin, the latex glove coating comprises 2-8 parts of a slipping auxiliary agent, preferably 3-7 parts, more preferably 4-6 parts, and even more preferably 5-5.5 parts. In the present invention, the slip aid preferably includes an ultra-high molecular weight silicone dispersion and silicone elastomer microparticles, and the mass ratio of the ultra-high molecular weight silicone dispersion to the silicone elastomer microparticles is preferably 3: (1 to 3), more preferably 3: (1.2-1.5). The mass ratio of the ultra-high molecular weight organosilicon dispersion to the organosilicon elastomer microparticles is preferably limited in the range, so that a coating formed by the latex glove coating can be smoother on the glove, and the cost is reduced to the greatest extent; wherein the ultra-high molecular weight organosilicon dispersoid is easy to hydrolyze, not easy to add, and gel or demulsification can be formed to form impurities. In an embodiment of the present invention, the ultra-high molecular weight silicone dispersion is specifically available from Silok50, inc. of Silok Polymer Co., ltd; the silicone elastomer microparticles were specifically purchased from upwelling materials technologies (Shanghai) limited under the trade designation FE212.
Based on the mass parts of the anionic modified acrylic resin, the latex glove coating comprises 2-10 parts of matte auxiliary agent, preferably 3-8 parts, and more preferably 4-6 parts. In the invention, the matte auxiliary agent preferably comprises one or more of water-based matting wax, powder-grade synthetic silica and matte resin, more preferably water-based matting wax, which is low in price and good in matting effect, and meanwhile, the coating can be smoother. In the present invention, the aqueous matting wax preferably includes one or more of polyethylene wax, polypropylene wax and zinc stearate, more preferably polyethylene wax, and in the embodiment of the present invention, the polyethylene wax is specifically purchased from the company of new materials science and technology, model number DHX-806A.
Based on the mass parts of the anionic modified acrylic resin, the latex glove coating comprises 4-7 parts of thickener, preferably 6-7 parts. In the present invention, the thickener preferably includes a modified polymethacrylic acid emulsion thickener and/or an associative polyurethane thickener. In the invention, the modified polymethacrylic acid emulsion is an alkali swelling thickener, which can improve the degree of a system, so that the system can keep a uniform stable suspension state, and the product can be stored stably. In the embodiment of the invention, the modified polymethacrylic acid emulsion is specifically purchased from Beijing Runbo Hengton technology Co., ltd, and the commodity model is RT-300.
Based on the mass parts of the anionic modified acrylic resin, the latex glove coating comprises 0.5 to 1 part of pH regulator, preferably 0.5 to 0.7 part. In the present invention, the pH adjuster preferably includes one or more of dimethylethanolamine, triethylamine, and AMP95 auxiliary agents. In the present invention, the pH of the latex glove coating is preferably 8 to 10, more preferably 8.5 to 9.2. The pH value of the latex glove coating is preferably controlled in the range, so that the latex glove coating has better stability, and the latex glove coating is used for preparing a coating of medical grade latex gloves, so that the surface of the coating is free from defects.
Based on the mass parts of the anionic modified acrylic resin, the latex glove coating comprises 2-8 parts of wetting agent, preferably 2-4 parts. In the present invention, the wetting agent preferably includes a silicone wetting agent and/or an acetylenic diol ether wetting agent. The invention preferably adopts the wetting agent of the type, and is favorable for better contact effect with glove base materials when the latex glove coating is used for preparing the coating of medical grade latex gloves. In the embodiment of the invention, the organosilicon wetting agent is specifically purchased from the environmental materials science and technology Co-Ltd of Meter (Beijing), the commercial models are YMT-245 and YMT-328, and the mass ratio of the YMT-245 organosilicon wetting agent to the YMT-328 organosilicon wetting agent is preferably 2:1.
Based on the mass parts of the anionic modified acrylic resin, the latex glove coating comprises 48-60 parts of water, preferably 49-53 parts. In the present invention, the water is preferably deionized water.
In the invention, the preparation method of the latex glove coating preferably comprises the following steps:
and mixing the anionic modified acrylic resin, the defoamer, the slipping auxiliary agent, the matte auxiliary agent, the thickener, the pH regulator and the wetting agent with water to obtain the latex glove coating.
In the present invention, the mixing preferably includes: dispersing the defoaming agent in part of water to obtain defoaming agent dispersion liquid; and sequentially adding the anionic modified acrylic resin, the defoaming agent dispersion liquid, the slipping auxiliary agent, the matte auxiliary agent, the thickening agent, the pH regulator and the wetting agent into the residual water. In the present invention, the mixing is preferably performed under stirring conditions; adding each material into the residual water, preferably stirring thoroughly to ensure that the components are fully dissolved and uniformly mixed, and then adding the next material; specifically, if the defoamer is emulsion, the defoamer is not easy to disperse, and is dispersed in a small amount of water (preferably 1-2% of the total water consumption) in advance, so that the defoamer is favorable for subsequent uniform mixing with other components; and if the ultra-high molecular weight organic silicon dispersoid is pasty sticky matter, stirring for 20-30 min is needed to be fully dissolved; if the pH regulator is added, the system can be thickened obviously, and the next material is added after stirring for 10-20 min.
The invention provides a medical grade latex glove, which comprises a latex glove substrate and a coating attached to the surface of the latex glove substrate, wherein the preparation raw materials of the coating comprise the latex glove coating according to the technical scheme.
The invention provides a preparation method of the medical grade latex glove, which comprises the following steps:
preparing a latex glove substrate by using a hand model, and placing the latex glove substrate into a diluent of a latex glove coating for dipping treatment to obtain a dipped latex glove substrate;
and baking the dipped latex glove base material, forming a coating on the surface of the latex glove base material, and soaking and washing with hot water after demolding to obtain the medical grade latex glove.
The invention utilizes a hand mould to prepare a latex glove substrate, and the latex glove substrate is placed in a diluent of a latex glove coating for dipping treatment, so as to obtain the dipped latex glove substrate. In the present invention, the latex glove substrate is preferably a vulcanized latex glove substrate; the specific preparation method of the vulcanized latex glove base material is not particularly limited, and the preparation method well known to those skilled in the art can be adopted. In the invention, the dilution of the latex glove coating is preferably prepared from the latex glove coating and water according to the mass ratio of 1: the ratio of (8) to (15) is preferably 1: (9-12); the water is preferably deionized water. In the present invention, the temperature of the impregnation treatment is preferably 20 to 50 ℃, more preferably 30 to 40 ℃; the time is preferably 3 to 5 seconds. In the present invention, the amount of the diluent of the latex glove coating is based on ensuring complete immersion of the latex glove substrate (with the hand mold).
After the dipped latex glove base material is obtained, the dipped latex glove base material is baked, a coating is formed on the surface of the latex glove base material, and after demolding, hot water is adopted for soaking and washing, so that the medical grade latex glove is obtained. In the present invention, the temperature of the baking treatment is preferably 90 to 120 ℃, more preferably 100 to 110 ℃; the time is preferably 20 to 25 minutes. The invention forms a coating layer by baking the latex glove coating which impregnates the surface of the latex glove substrate. In the present invention, the temperature of the hot water is preferably 60 to 80 ℃, more preferably 70 ℃; the time for the soaking and washing is preferably 1 to 4 hours, more preferably 1 to 2 hours. The invention realizes disinfection and removes impurities such as calcium carbonate, magnesium ions and the like (from a latex glove base material) through hot water soaking and washing. After the completion of the washing, the glove is preferably taken out and dried to obtain the medical grade latex glove.
The technical solutions of the present invention will be clearly and completely described in the following in connection with the embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The sources of some of the raw materials in the following examples are as follows:
the defoamer adopts an organosilicon defoamer, and is specifically purchased from Jiangsu Teng auxiliary agent Co., ltd, and the commodity model is TSA-630;
the slipping auxiliary agent is an ultrahigh molecular weight organic silicon dispersoid and organic silicon elastomer micron particles; the ultra-high molecular weight silicone dispersion is specifically available from Silok50, a commercial model number of Silok Polymer Co., ltd; the organosilicon elastomer micron particles are specifically purchased from Shanghai materials technology (Shanghai) limited company, and the commodity model is FE212;
the matte auxiliary agent adopts polyethylene wax, and is specifically purchased from the new material science and technology Co., ltd, and the commodity model is DHX-806A;
the thickener adopts modified polymethacrylic acid emulsion, and is specifically purchased from Beijing Runbo Hengtong technology Co., ltd, and the commodity model is RT-300;
the wetting agent is an organosilicon wetting agent, and is specifically purchased from the technical company of environmental materials of Meter (Beijing), the commercial models are YMT-245 and YMT-328, and the mass ratio of the YMT-245 organosilicon wetting agent to the YMT-328 organosilicon wetting agent is 2:1.
The preparation method of the anion modified acrylic resin in the following examples comprises the following steps:
15g of water, 40g of acrylic acid monomer (specifically butyl acrylate, methyl methacrylate, methacrylic acid and acrylamide are compounded according to the mass ratio of 5:17:3:1) and 3.2g of emulsifier (specifically SDS and propylene glycol block polyether are compounded according to the mass ratio of 1:1) are mixed, and pre-emulsification treatment is carried out for 30min under the conditions of 25 ℃ and stirring speed of 1000rpm, so as to obtain pre-emulsion;
mixing 74g of water with 3g of sodium bicarbonate, heating the obtained mixture to 75 ℃, then adding 30wt% potassium persulfate aqueous solution (the mass of potassium persulfate is 0.1 g), then dropwise adding 1.2g of pre-emulsion within 15min, and preserving the temperature for 30min after dropwise adding to obtain seed emulsion;
simultaneously dropwise adding a 10wt% potassium persulfate aqueous solution (the mass of potassium persulfate is 0.1 g) and residual pre-emulsion into the seed emulsion, wherein the total dropwise adding time of the potassium persulfate aqueous solution is 140min, the total dropwise adding time of the residual pre-emulsion is 2h, and carrying out heat preservation treatment for 1h at 75 ℃ after the addition of the two aqueous solutions to obtain emulsion;
and cooling the emulsion to 45 ℃, then adopting ammonia water with the concentration of 80wt% to adjust the pH value of the emulsion to 7.54, and then filtering to remove impurities to obtain the anion modified acrylic resin.
Examples 1 to 3
Dispersing the defoamer in part of water (accounting for 2% of the total water consumption) according to the formula in table 1 to obtain defoamer dispersion liquid; and sequentially adding the anionic modified acrylic resin, the defoaming agent dispersion liquid, the slipping auxiliary agent, the matte auxiliary agent, the thickening agent, the pH regulator and the wetting agent into the residual water under the stirring condition, so that all the components are fully dissolved and uniformly mixed, and the latex glove coating is obtained.
Table 1 formulations of latex glove coating in examples 1-3
Test example 1
The latex glove coating prepared in example 1 (denoted as stock solution # 1) was mixed with water in a mass ratio of 1:10, and the resulting dilution was denoted as dilution # 1;
the latex glove coating prepared in example 2 (denoted as stock solution # 2) was mixed with water in a mass ratio of 1:10, and the resulting dilution was denoted as dilution # 2;
the latex glove coating prepared in example 3 (marked as 3# stock solution) and water were mixed according to a mass ratio of 1:10, and the obtained diluent is marked as 3# diluent;
the imported latex glove coating (marked as a 4# stock solution and the trade name Long Sha) and water are mixed according to the mass ratio of 1:10, and the obtained diluent is marked as No. 4 diluent;
the matte degree of each stock solution and the diluent is tested by adopting a gloss meter, and specific results are shown in table 2, wherein the smaller the 60-degree gloss value is, the better the matte degree of the coating is. As can be seen from Table 2, the matte effect of the latex glove coating prepared in examples 1-3 was better than the matte effect of the imported latex glove coating, and the latex glove coating prepared in example 2 was the most cost effective.
TABLE 2 matt values of stock solutions and dilutions
Examples 4 to 6
Latex glove coating was prepared according to the method of example 1, except that the formulation of the latex glove coating is specifically shown in table 3.
Table 3 formulations of latex glove coating in examples 4-6
Test example 2
The latex glove coating prepared in examples 4 to 6 and the imported latex glove coating are respectively mixed with water according to the mass ratio of 1:10 to obtain a diluent;
preparing a vulcanized latex glove substrate by using a hand mold, placing the vulcanized latex glove substrate into a diluent, and carrying out dipping treatment for 3s at 35+/-5 ℃ to obtain a dipped latex glove substrate;
and baking the dipped latex glove base material for 20min at 105+/-5 ℃, forming a coating on the surface of the latex glove base material, performing foam washing for 1h by hot water at 70 ℃ after demolding, and drying to obtain the medical grade latex glove.
The inner side smoothness of each medical grade latex glove was tested by using an FPT-F1 friction tester, and the specific results are shown in Table 4, wherein the larger the smoothness value, the smaller the friction force, and the smoother the coating. As can be seen from Table 4, the coatings prepared from the latex glove coating in examples 4 to 6 have good slipping performance, wherein the coating prepared from the latex glove coating in example 4 has good slipping performance, and the coating has the highest cost performance on the basis of adding less auxiliary agent.
Table 4 coating slip test results
| Latex glove coating source | Slip degree |
| Example 4 | 10 |
| Example 5 | 6 |
| Example 6 | 10 |
| Import latex glove coating | 8 |
FIG. 1 is an electron micrograph (2000 times) of a medical grade latex glove middle coating prepared using the latex glove coating of example 4, and FIG. 2 is an electron micrograph (10000 times) of a medical grade latex glove middle coating prepared using the latex glove coating of example 4; as can be seen from fig. 1 and 2, in the medical grade latex glove prepared by using the latex glove coating in example 4, a large molecular weight smoothing substance (e.g., an ultra-high molecular weight silicone dispersion) was attached to the rough surface of the latex glove, and the smoothing effect was good.
FIG. 3 is an electron micrograph (2000 times) of a medical grade latex glove middle coating prepared using an import latex glove coating, and FIG. 4 is an electron micrograph (10000 times) of a medical grade latex glove middle coating prepared using an import latex glove coating; as can be seen from fig. 3 and 4, the medical grade latex glove prepared with the imported latex glove coating has less surface slipping substance adhesion and is generally smooth.
Test example 3
Medical grade latex gloves were prepared according to the method of test example 2 using the latex glove coating of example 6 and the imported latex glove coating, wherein the temperature of water in the soaking and washing process was 25 ℃, 50 ℃, 70 ℃ and 80 ℃ respectively, and whether the coating was peeled off was observed to characterize the water and high temperature resistance of the coating, and the specific results are shown in table 5. As shown in Table 5, the latex glove coating provided by the invention has good stability and good water and high temperature resistance.
Table 5 coating water and high temperature resistance test results
From the test examples, the latex glove coating provided by the invention has good coating smoothness and matt, and the coating has stable performance after hot water soaking and washing and is not easy to fall off. Meanwhile, the latex glove coating provided by the invention is low in price, and the overall price is about 20% cheaper than that of imported latex glove coatings.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications could be made by those skilled in the art without departing from the principles of the present invention, which modifications would also be considered to be within the scope of the invention.
Claims (7)
1. The latex glove coating comprises the following components in parts by weight:
30-50 parts of anion modified acrylic resin; the preparation method of the anion modified acrylic resin comprises the following steps: mixing an acrylic acid monomer, an emulsifier and water, and performing pre-emulsification treatment to obtain a pre-emulsion; mixing an aqueous alkali reagent solution with a first initiator, and adding part of pre-emulsion into the obtained mixture to obtain seed emulsion; adding the residual pre-emulsion and a second initiator into the seed emulsion, and performing emulsification treatment to obtain emulsion; adjusting the pH value of the emulsion to 7-8 to obtain anion modified acrylic resin; the acrylic acid monomer is formed by compounding butyl acrylate, methyl methacrylate, methacrylic acid and acrylamide, wherein the mass ratio of the butyl acrylate to the methyl methacrylate to the methacrylic acid to the acrylamide is (2-20): (10-50): (2-10): (1-5); the emulsifier comprises sodium dodecyl benzene sulfate and/or propylene glycol block polyether;
1-2 parts of a defoaming agent;
2-8 parts of a slipping auxiliary agent; the slipping auxiliary agent is ultrahigh molecular weight organic silicon dispersoid and organic silicon elastomer micron particles, and the mass ratio of the ultrahigh molecular weight organic silicon dispersoid to the organic silicon elastomer micron particles is 3: (1-3);
2-10 parts of matte auxiliary agent; the matte auxiliary agent is water-based matting wax;
4-7 parts of a thickening agent;
0.5-1 part of pH regulator;
2-8 parts of a wetting agent;
48-60 parts of water.
2. The latex glove coating according to claim 1, wherein the aqueous alkali agent is one or more of sodium bicarbonate, sodium dihydrogen phosphate and sodium acetate;
the initiator comprises potassium persulfate and/or amine persulfate;
the reagent used for adjusting the pH value of the emulsion is ammonia water.
3. The latex glove coating according to claim 1, wherein the defoamer comprises a silicone-based defoamer and/or a polyether-based defoamer.
4. The latex glove coating according to claim 1, wherein the thickener comprises a modified polymethacrylic acid emulsion thickener and/or an associative polyurethane thickener;
the pH regulator comprises one or more of dimethylethanolamine, triethylamine and AMP95 auxiliary agent;
the wetting agent comprises an organosilicon wetting agent and/or an alkyne diol ether wetting agent.
5. A medical grade latex glove comprising a latex glove substrate and a coating attached to the surface of the latex glove substrate, wherein the coating is prepared from the latex glove coating of any one of claims 1-4.
6. A method of making a medical grade latex glove of claim 5, comprising the steps of:
preparing a latex glove substrate by using a hand model, and placing the latex glove substrate into a diluent of a latex glove coating for dipping treatment to obtain a dipped latex glove substrate;
and baking the dipped latex glove base material, forming a coating on the surface of the latex glove base material, and soaking and washing with hot water after demolding to obtain the medical grade latex glove.
7. The preparation method of the latex glove coating according to claim 6, wherein the mass ratio of the latex glove coating to water is 1: (8-15) mixing the materials in proportion;
the temperature of the soaking treatment is 20-50 ℃ and the time is 3-5 s;
the temperature of the hot water is 60-80 ℃, and the soaking and washing time is 1-4 hours.
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| CN101440253A (en) * | 2008-12-26 | 2009-05-27 | 郭琦 | Environment-friendly aqueous glove coating , and preparation thereof |
| CN105968253A (en) * | 2016-06-01 | 2016-09-28 | 嘉宝莉化工集团股份有限公司 | Water-based self-extinction acrylic emulsion and preparation method and application thereof |
| CN111410720A (en) * | 2019-01-08 | 2020-07-14 | 广州市俊达手套有限公司 | Powder-free glove finishing agent containing organic silicon modified acrylate copolymer |
| CN112592433A (en) * | 2020-11-27 | 2021-04-02 | 擎天材料科技有限公司 | Water-based acrylic resin, coating composition and application thereof |
| CN114479629A (en) * | 2021-12-24 | 2022-05-13 | 优美特（北京）环境材料科技股份公司 | Dipping paint for gloves and method for preparing nitrile rubber-coating composite gloves |
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| WO2004037305A1 (en) * | 2002-10-21 | 2004-05-06 | Allegiance Corporation | Coating composition for skin-contacting surface of elastomeric articles and articles containing the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101440253A (en) * | 2008-12-26 | 2009-05-27 | 郭琦 | Environment-friendly aqueous glove coating , and preparation thereof |
| CN105968253A (en) * | 2016-06-01 | 2016-09-28 | 嘉宝莉化工集团股份有限公司 | Water-based self-extinction acrylic emulsion and preparation method and application thereof |
| CN111410720A (en) * | 2019-01-08 | 2020-07-14 | 广州市俊达手套有限公司 | Powder-free glove finishing agent containing organic silicon modified acrylate copolymer |
| CN112592433A (en) * | 2020-11-27 | 2021-04-02 | 擎天材料科技有限公司 | Water-based acrylic resin, coating composition and application thereof |
| CN114479629A (en) * | 2021-12-24 | 2022-05-13 | 优美特（北京）环境材料科技股份公司 | Dipping paint for gloves and method for preparing nitrile rubber-coating composite gloves |
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