CN106674530A - Preparation method of carboxylic acrylonitrile butadiene rubber latex for high-strength and flame-retardant gloves - Google Patents
Preparation method of carboxylic acrylonitrile butadiene rubber latex for high-strength and flame-retardant gloves Download PDFInfo
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- CN106674530A CN106674530A CN201611198734.0A CN201611198734A CN106674530A CN 106674530 A CN106674530 A CN 106674530A CN 201611198734 A CN201611198734 A CN 201611198734A CN 106674530 A CN106674530 A CN 106674530A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G81/00—Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers
- C08G81/02—Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers at least one of the polymers being obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C08G81/021—Block or graft polymers containing only sequences of polymers of C08C or C08F
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
- C08F2/24—Emulsion polymerisation with the aid of emulsifying agents
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/38—Polymerisation using regulators, e.g. chain terminating agents, e.g. telomerisation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F236/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds
- C08F236/02—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds
- C08F236/04—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated
- C08F236/12—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated with nitriles
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Abstract
The invention provides a preparation method of carboxylic acrylonitrile butadiene rubber latex for high-strength and flame-retardant gloves. The preparation method comprises the following steps of (1) synthesizing of carboxylic acrylonitrile butadiene rubber latex; (2) degassing and post-treatment of the rubber latex. The preparation method has the advantages that the post-initiation reaction is performed to form new reactive species, and a polyvinyl chloride molecular chain is introduced into a molecular chain of the carboxylic acrylonitrile butadiene rubber latex; the reaction temperature adopts medium temperature and low temperature, the highest temperature does not exceed 40 DEG C, the molecular weight is high, the gelling rate is lower, and the processing property of a product is improved; in addition, by supplementing an emulsifier and thiol by batches, the molecular structure of the polymer is more uniform, and the property is better; by introducing the polyvinyl chloride molecular chain through chemical grafting reaction, the mechanical strength and abrasion-resistant property of the product are greatly improved; since chloride elements are contained, the flame-retardant characteristic is good.
Description
Technical field
The present invention relates to the preparation method technical field of carboxylic acrylonitrile butadiene rubber latex, specially a kind of high-strength resistance to fire-retardant glove carboxylic
The preparation method of base NBR latex.
Background technology
Carboxylic acrylonitrile butadiene rubber latex mainly by acrylonitrile, butadiene, methacrylic acid and other auxiliary agents, through emulsion polymerization
A kind of macromolecule white emulsion.The emulsion is due to good film property, tensile strength and elongation at break, now leading
It is applied to make butyronitrile safety and industrial gloves and the disposable medical inspection glove without liner.At present, carboxylic acrylonitrile butadiene rubber latex is industrial
In the product of change, following aspect improvement is concentrated mainly on：On the one hand it is the research to polymerization formula system, such as introduces the 4th, the
Five monomers carry out copolymerization, as in CN1347925, CN102887977 patent, introducing acrylic ester monomer or styrene list
Body, improves the caking property or intensity of product to improve the performance of latex product；On the other hand mainly to polymerization reaction system
It is improved, such as adopts redox system, reduce polymeric reaction temperature, improves the molecular weight of polymer to improve end article
Performance.By the change of above-mentioned formula and system, the processed and applied performance of latex glove is mainly improved on the original basis
And physical property.
As economic continuous development, requirement of the every profession and trade to labour protection articles for use are gradually stepped up, some high intensity are needed
The carboxylic acrylonitrile butadiene rubber latex glove product of resistance to fire resistance, to meet the requirement of different user, but the product of domestic industry at present,
It is mainly used for producing common butyronitrile safety and industrial gloves and disposable medical inspection glove latex, therefore, develop some special
The carboxylic acrylonitrile butadiene rubber latex of the trade mark and performance requirement, widens the application and purposes of carboxylic acrylonitrile butadiene rubber latex, meets the market demand, shows
Obtain very necessary.Polrvinyl chloride be as macromolecular material in the third-largest versatile material, low price, with good property
Can, it is widely used in the middle of every field and industry.Contain chlorine element in polrvinyl chloride molecular structure, with certain fire-retardant
Property, while the excellent physical properties of the product, therefore, how with reference to polrvinyl chloride and the advantage of carboxylic acrylonitrile butadiene rubber latex, develop
A kind of new carboxylic acrylonitrile butadiene rubber latex product.Generally mainly there are two methods, one kind is physical mixed method, in carboxylic acrylonitrile butadiene rubber latex
Least a portion of polyvinyl chloride emulsion is mixed, after carrying out physical blending, then is used, but with the method production butyronitrile gloves very
Difficulty, performance is also difficult to reach requirement；Another kind is, by chemical method, polychlorostyrene second to be introduced on carboxylic acrylonitrile butadiene rubber latex strand
Alkene molecular structure, so both compatibilitys are increased substantially, while respective advantage can have been given play to, with the latex production
Glove have good processability and physical property.
The content of the invention
Technical problem solved by the invention is to provide a kind of preparation of high-strength resistance to fire-retardant glove carboxylic acrylonitrile butadiene rubber latex
Method, to solve the problems, such as above-mentioned background technology in.
Technical problem solved by the invention employs the following technical solutions to realize：A kind of high-strength resistance to fire-retardant glove carboxyl
The preparation method of NBR latex, comprises the following steps：
(1) synthesis of carboxylic acrylonitrile butadiene rubber latex, according to weight portion deionized water, electrolyte, pH buffer, sulfur are sequentially added
Alcohol, emulsifying agent, acrylonitrile, unsaturated carboxylic acid, esters of unsaturated carboxylic acids, initiator, nitrogen charging evacuation repeatedly for three times, adds fourth two
Alkene, starts to warm up to 25~35 DEG C, reacts 6~8 hours, starts to add emulsifying agent and mercaptan for the first time, it is continuously heating to 36~
When 40 DEG C, react 4~6 hours, when conversion ratio reaches 98%, emulsifying agent, initiator are added for the second time in beginning, react 10-30
After minute, polyvinyl chloride emulsion is added, continue to react 2~5 hours, stopped reaction；
(2) latex degassing and post processing, the latex being polymerized, are initially charged deionized water, and latex is diluted to into total solid substance is
39-41%, begins to pass through degassing tower, and latex is entered from top of tower, and bottom is passed through steam, the top steam with acrylonitrile out
Into condensing units, condensed nitrile water returns to polymerization and is continuing with, and tower bottom latex is reclaimed, and adjusts total solid substance for 43-
45%, pH are that after 8-9, packaging is used for client.
The deionized water, electrolyte, pH buffer, mercaptan, emulsifying agent, acrylonitrile, unsaturated carboxylic acid, unsaturated carboxylic acid
Ester, initiator, butadiene, are by weight ratio acrylonitrile：27~35 parts；Butadiene：60~70 parts；Unsaturated carboxylic acid：2~7
Part；Esters of unsaturated carboxylic acids：0~5 part；Emulsifying agent：2.0~5.0 parts；Electrolyte：0.1~0.5 part；PH buffer：0.1~0.5
Part；Mercaptan：0.4~1.0 part；Initiator：0.2~0.7 part；Deionized water：110~150 parts.
The esters of unsaturated carboxylic acids is in acrylic acid methyl ester., ethyl acrylate, butyl acrylate or methyl methacrylate
One or more mixing.
The polyvinyl chloride emulsion is the polrvinyl chloride through emulsion method synthesis, and the degree of polymerization is in 1000-1300, solid content
40-45%；The additional amount is all that, with the calculating of polrvinyl chloride dry, its additional amount is butadiene, acrylonitrile, unsaturated carboxylic acid
And the 5~20% of esters monomer total amount.
The emulsifying agent is in sodium lauryl sulphate, dodecylbenzene sodium sulfonate, sodium soap, LOMAR PWA EINECS 246-676-2 acid sodium
Plant or several mixing.
The electrolyte is one or more mixing in potassium chloride, potassium carbonate or sodium carbonate.
The pH buffer is one or more in sodium carbonate, sodium bicarbonate, potassium carbonate, potassium bicarbonate or potassium hydrogen phosphate
Mixing.
The initiator is potassium peroxydisulfate or one or two mixing in Ammonium persulfate..
Compared with disclosed technology, there is advantages below in the present invention：(1) present invention adopts rear initiation reaction, is formed new
Spike, polrvinyl chloride strand is introduced on carboxylic acrylonitrile butadiene rubber latex strand；(2) low-temp reaction during reaction temperature is adopted, most
High-temperature is less than 40 DEG C, and molecular weight is high, and gel fraction is relatively low, and the processing characteristics of product is improved；(3) adopt and add in batches
Emulsifying agent and mercaptan so that polymer molecular structure is more homogeneous, performance is more preferable；(4) polychlorostyrene second is introduced by chemical graft reaction
Alkene strand so that the mechanical strength and wearability of product is lifted by a relatively large margin, simultaneously because containing chlorine element, plays good
Good flame-retarding characteristic.
Specific embodiment
In order that the technological means of the present invention, creation characteristic, workflow, using method reached purpose and effect are easy to bright
It is white to understand, below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described,
Obviously, described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.Based in the present invention
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, all
Belong to the scope of protection of the invention.
A kind of preparation method of high-strength resistance to fire-retardant glove carboxylic acrylonitrile butadiene rubber latex, comprises the following steps：
(1) synthesis of carboxylic acrylonitrile butadiene rubber latex, according to weight portion deionized water, electrolyte, pH buffer, sulfur are sequentially added
Alcohol, emulsifying agent, acrylonitrile, unsaturated carboxylic acid, esters of unsaturated carboxylic acids, initiator, nitrogen charging evacuation repeatedly for three times, adds fourth two
Alkene, starts to warm up to 25~35 DEG C, reacts 6~8 hours, starts to add emulsifying agent and mercaptan for the first time, it is continuously heating to 36~
When 40 DEG C, react 4~6 hours, when conversion ratio reaches 98%, emulsifying agent, initiator are added for the second time in beginning, react 10-30
After minute, polyvinyl chloride emulsion is added, continue to react 2~5 hours, stopped reaction；
(2) latex degassing and post processing, the latex being polymerized, are initially charged deionized water, and latex is diluted to into total solid substance is
39-41%, begins to pass through degassing tower, and latex is entered from top of tower, and bottom is passed through steam, the top steam with acrylonitrile out
Into condensing units, condensed nitrile water returns to polymerization and is continuing with, and tower bottom latex is reclaimed, and adjusts total solid substance for 43-
45%, pH are that after 8-9, packaging is used for client.
Embodiment 1
A kind of preparation method of high-strength resistance to fire-retardant glove carboxylic acrylonitrile butadiene rubber latex, comprises the following steps：
(1) synthesis of carboxylic acrylonitrile butadiene rubber latex：First to polymeric kettle evacuation, 120 parts of deionized water, electrolyte are put into successively
0.2 part, 0.2 part of pH buffer, 2.5 parts of emulsifying agent, 30 parts of acrylonitrile, 5 parts of unsaturated carboxylic acid, 2 parts of esters of unsaturated carboxylic acids, mercaptan
0.6 part, 0.3 part of initiator.Inflated with nitrogen evacuation repeatedly for three times, adds 63 parts of butadiene, starts to warm up to 25~35 DEG C, reacts
6~8 hours, start to add 0.3 part of emulsifying agent and 0.2 part of mercaptan for the first time；When being continuously heating to 36~40 DEG C, reaction 4~6 is little
When, when conversion ratio reaches 98%, 0.2 part of emulsifying agent and 0.15 part of initiator are added for the second time in beginning, after reacting 20 minutes, are mended
Plus 5% polrvinyl chloride of monomer total amount, continue to react 2~5 hours, stopped reaction.
(2) latex degassing and post processing：The latex being polymerized, is initially charged deionized water, latex is diluted to into total solid substance and is
40 ± 1%, degassing tower is begun to pass through, latex is entered from top of tower, and bottom is passed through steam, the top steam with acrylonitrile out
Into condensing units (condensed nitrile water returns to polymerization and is continuing with), tower bottom latex is reclaimed, and adjust total solid substance for 44 ±
1%, pH be 8.5 ± 0.5% after, packaging use for client.
Embodiment 2
A kind of preparation method of high-strength resistance to fire-retardant glove carboxylic acrylonitrile butadiene rubber latex, comprises the following steps：
(1) synthesis of carboxylic acrylonitrile butadiene rubber latex：First to polymeric kettle evacuation, 120 parts of deionized water, electrolyte are put into successively
0.2 part, 0.2 part of pH buffer, 2.5 parts of emulsifying agent, 27 parts of acrylonitrile, 5 parts of unsaturated carboxylic acid, 2 parts of esters of unsaturated carboxylic acids, mercaptan
0.6 part, 0.3 part of initiator.Inflated with nitrogen evacuation repeatedly for three times, adds 66 parts of butadiene, starts to warm up to 25~35 DEG C, reacts
6~8 hours, start to add 0.3 part of emulsifying agent and 0.2 part of mercaptan for the first time；When being continuously heating to 36~40 DEG C, reaction 4~6 is little
When, when conversion ratio reaches 98%, 0.2 part of emulsifying agent and 0.15 part of initiator are added for the second time in beginning, after reacting 20 minutes, are mended
Plus 5% polrvinyl chloride of monomer total amount, continue to react 2~5 hours, stopped reaction.
(2) latex degassing and post processing：With embodiment 1.
Embodiment 3
A kind of preparation method of high-strength resistance to fire-retardant glove carboxylic acrylonitrile butadiene rubber latex, comprises the following steps：
(1) synthesis of carboxylic acrylonitrile butadiene rubber latex：First to polymeric kettle evacuation, 120 parts of deionized water, electrolyte are put into successively
0.2 part, 0.2 part of pH buffer, 2.5 parts of emulsifying agent, 33 parts of acrylonitrile, 5 parts of unsaturated carboxylic acid, 2 parts of esters of unsaturated carboxylic acids, mercaptan
0.6 part, 0.3 part of initiator.Inflated with nitrogen evacuation repeatedly for three times, adds 60 parts of butadiene, starts to warm up to 25~35 DEG C, reacts
6~8 hours, start to add 0.3 part of emulsifying agent and 0.2 part of mercaptan for the first time；When being continuously heating to 36~40 DEG C, reaction 4~6 is little
When, when conversion ratio reaches 98%, 0.2 part of emulsifying agent and 0.15 part of initiator are added for the second time in beginning, after reacting 20 minutes, are mended
Plus 5% polrvinyl chloride of monomer total amount, continue to react 2~5 hours, stopped reaction.
(2) latex degassing and post processing：With embodiment 1.
Embodiment 4
A kind of preparation method of high-strength resistance to fire-retardant glove carboxylic acrylonitrile butadiene rubber latex, comprises the following steps：
(1) synthesis of carboxylic acrylonitrile butadiene rubber latex：First to polymeric kettle evacuation, 120 parts of deionized water, electrolyte are put into successively
0.4 part, 0.3 part of pH buffer, 2.5 parts of emulsifying agent, 30 parts of acrylonitrile, 5 parts of unsaturated carboxylic acid, 2 parts of esters of unsaturated carboxylic acids, mercaptan
0.6 part, 0.3 part of initiator.Inflated with nitrogen evacuation repeatedly for three times, adds 63 parts of butadiene, starts to warm up to 25~35 DEG C, reacts
6~8 hours, start to add 0.3 part of emulsifying agent and 0.2 part of mercaptan for the first time；When being continuously heating to 36~40 DEG C, reaction 4~6 is little
When, when conversion ratio reaches 98%, 0.2 part of emulsifying agent and 0.15 part of initiator are added for the second time in beginning, after reacting 20 minutes, are mended
Plus 5% polrvinyl chloride of monomer total amount, continue to react 2~5 hours, stopped reaction.
(2) latex degassing and post processing：With embodiment 1.
Embodiment 5
A kind of preparation method of high-strength resistance to fire-retardant glove carboxylic acrylonitrile butadiene rubber latex, comprises the following steps：
(1) synthesis of carboxylic acrylonitrile butadiene rubber latex：First to polymeric kettle evacuation, 120 parts of deionized water, electrolyte are put into successively
0.2 part, 0.2 part of pH buffer, 2.5 parts of emulsifying agent, 30 parts of acrylonitrile, 5 parts of unsaturated carboxylic acid, 2 parts of esters of unsaturated carboxylic acids, mercaptan
0.6 part, 0.25 part of initiator.Inflated with nitrogen evacuation repeatedly for three times, adds 63 parts of butadiene, starts to warm up to 25~35 DEG C, instead
Answer 6~8 hours, start to add 0.3 part of emulsifying agent and 0.2 part of mercaptan for the first time；When being continuously heating to 36~40 DEG C, reaction 4~6
Hour, when conversion ratio reaches 98%, 0.2 part of emulsifying agent and 0.2 part of initiator are added for the second time in beginning, after reacting 20 minutes,
5% polrvinyl chloride of monomer total amount is added, continues to react 2~5 hours, stopped reaction.
(2) latex degassing and post processing：With embodiment 1.
Embodiment 6
A kind of preparation method of high-strength resistance to fire-retardant glove carboxylic acrylonitrile butadiene rubber latex, comprises the following steps：
(1) synthesis of carboxylic acrylonitrile butadiene rubber latex：First to polymeric kettle evacuation, 120 parts of deionized water, electrolyte are put into successively
0.2 part, 0.2 part of pH buffer, 2.5 parts of emulsifying agent, 30 parts of acrylonitrile, 5 parts of unsaturated carboxylic acid, 2 parts of esters of unsaturated carboxylic acids, mercaptan
0.5 part, 0.3 part of initiator.Inflated with nitrogen evacuation repeatedly for three times, adds 63 parts of butadiene, starts to warm up to 25~35 DEG C, reacts
6~8 hours, start to add 0.3 part of emulsifying agent and 0.3 part of mercaptan for the first time；When being continuously heating to 36~40 DEG C, reaction 4~6 is little
When, when conversion ratio reaches 98%, 0.2 part of emulsifying agent and 0.15 part of initiator are added for the second time in beginning, after reacting 20 minutes, are mended
Plus 5% polrvinyl chloride of monomer total amount, continue to react 2~5 hours, stopped reaction.
(2) latex degassing and post processing：With embodiment 1.
Embodiment 7
A kind of preparation method of high-strength resistance to fire-retardant glove carboxylic acrylonitrile butadiene rubber latex, comprises the following steps：
(1) synthesis of carboxylic acrylonitrile butadiene rubber latex：First to polymeric kettle evacuation, 140 parts of deionized water, electrolyte are put into successively
0.4 part, 0.3 part of pH buffer, 2.5 parts of emulsifying agent, 30 parts of acrylonitrile, 5 parts of unsaturated carboxylic acid, 2 parts of esters of unsaturated carboxylic acids, mercaptan
0.6 part, 0.3 part of initiator.Inflated with nitrogen evacuation repeatedly for three times, adds 63 parts of butadiene, starts to warm up to 25~35 DEG C, reacts
6~8 hours, start to add 0.3 part of emulsifying agent and 0.2 part of mercaptan for the first time；When being continuously heating to 36~40 DEG C, reaction 4~6 is little
When, when conversion ratio reaches 98%, 0.2 part of emulsifying agent and 0.15 part of initiator are added for the second time in beginning, after reacting 20 minutes, are mended
Plus 5% polrvinyl chloride of monomer total amount, continue to react 2~5 hours, stopped reaction.
(2) latex degassing and post processing：With embodiment 1.
Embodiment 8
A kind of preparation method of high-strength resistance to fire-retardant glove carboxylic acrylonitrile butadiene rubber latex, comprises the following steps：
(1) synthesis of carboxylic acrylonitrile butadiene rubber latex：First to polymeric kettle evacuation, 120 parts of deionized water, electrolyte are put into successively
0.2 part, 0.2 part of pH buffer, 2.7 parts of emulsifying agent, 30 parts of acrylonitrile, 5 parts of unsaturated carboxylic acid, 2 parts of esters of unsaturated carboxylic acids, mercaptan
0.6 part, 0.3 part of initiator.Inflated with nitrogen evacuation repeatedly for three times, adds 63 parts of butadiene, starts to warm up to 25~35 DEG C, reacts
6~8 hours, start to add 0.5 part of emulsifying agent and 0.2 part of mercaptan for the first time；When being continuously heating to 36~40 DEG C, reaction 4~6 is little
When, when conversion ratio reaches 98%, 0.2 part of emulsifying agent and 0.15 part of initiator are added for the second time in beginning, after reacting 20 minutes, are mended
Plus 5% polrvinyl chloride of monomer total amount, continue to react 2~5 hours, stopped reaction.
(2) latex degassing and post processing：With embodiment 1.
Embodiment 9
A kind of preparation method of high-strength resistance to fire-retardant glove carboxylic acrylonitrile butadiene rubber latex, comprises the following steps：
(1) synthesis of carboxylic acrylonitrile butadiene rubber latex：First to polymeric kettle evacuation, 120 parts of deionized water, electrolyte are put into successively
0.2 part, 0.2 part of pH buffer, 2.7 parts of emulsifying agent, 30 parts of acrylonitrile, 5 parts of unsaturated carboxylic acid, 2 parts of esters of unsaturated carboxylic acids, mercaptan
0.6 part, 0.3 part of initiator.Inflated with nitrogen evacuation repeatedly for three times, adds 63 parts of butadiene, starts to warm up to 25~35 DEG C, reacts
6~8 hours, start to add 0.5 part of emulsifying agent and 0.2 part of mercaptan for the first time；When being continuously heating to 36~40 DEG C, reaction 4~6 is little
When, when conversion ratio reaches 98%, 0.2 part of emulsifying agent and 0.15 part of initiator are added for the second time in beginning, after reacting 20 minutes, are mended
Plus 15% polrvinyl chloride of monomer total amount, continue to react 2~5 hours, stopped reaction.
(2) latex degassing and post processing：With embodiment 1.
Ultimate principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel it should be appreciated that the present invention is not restricted to the described embodiments, the simply explanation described in above-described embodiment and description this
The principle of invention, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, these changes
Change and improvement is both fallen within scope of the claimed invention.The claimed scope of the present invention by appending claims and
Its equivalent thereof.
Claims (9)
1. a kind of preparation method of high-strength resistance to fire-retardant glove carboxylic acrylonitrile butadiene rubber latex, it is characterised in that：Comprise the following steps：
(1) synthesis of carboxylic acrylonitrile butadiene rubber latex, according to weight portion deionized water, electrolyte, pH buffer, mercaptan, breast are sequentially added
Agent, acrylonitrile, unsaturated carboxylic acid, esters of unsaturated carboxylic acids, initiator, nitrogen charging evacuation repeatedly for three times, adds butadiene, opens
Beginning is warming up to 25~35 DEG C, reacts 6~8 hours, starts to add emulsifying agent and mercaptan for the first time, is continuously heating to 36~40 DEG C
When, react 4~6 hours, when conversion ratio reaches 98%, emulsifying agent, initiator are added for the second time in beginning, react 10-30 minutes
Afterwards, polyvinyl chloride emulsion is added, continues to react 2~5 hours, stopped reaction；
(2) latex degassing and post processing.
2. a kind of preparation method of high-strength resistance to fire-retardant glove carboxylic acrylonitrile butadiene rubber latex according to claim 1, its feature exists
In：The latex degassing and post processing are：The latex being polymerized, is initially charged deionized water, and latex is diluted to into total solid substance for 39-
41%, degassing tower is begun to pass through, latex is entered from top of tower, and bottom is passed through steam, and the top steam with acrylonitrile out enters
Enter condensing units, condensed nitrile water returns to polymerization and is continuing with, tower bottom latex is reclaimed, and adjust total solid substance for 43-45%,
PH is that after 8-9, packaging is used for client.
3. a kind of preparation method of high-strength resistance to fire-retardant glove carboxylic acrylonitrile butadiene rubber latex according to claim 1, its feature exists
In：The deionized water, electrolyte, pH buffer, mercaptan, emulsifying agent, acrylonitrile, unsaturated carboxylic acid, esters of unsaturated carboxylic acids, draw
Agent, butadiene are sent out, is by weight ratio acrylonitrile：27~35 parts；Butadiene：60~70 parts；Unsaturated carboxylic acid：2~7 parts；No
Saturated carboxylic acid ester：0~5 part；Emulsifying agent：2.0~5.0 parts；Electrolyte：0.1~0.5 part；PH buffer：0.1~0.5 part；Sulfur
Alcohol：0.4~1.0 part；Initiator：0.2~0.7 part；Deionized water：110~150 parts.
4. a kind of preparation method of high-strength resistance to fire-retardant glove carboxylic acrylonitrile butadiene rubber latex according to claim 1, its feature exists
In：The esters of unsaturated carboxylic acids is the one kind in acrylic acid methyl ester., ethyl acrylate, butyl acrylate or methyl methacrylate
Or several mixing.
5. a kind of preparation method of high-strength resistance to fire-retardant glove carboxylic acrylonitrile butadiene rubber latex according to claim 1, its feature exists
In：The polyvinyl chloride emulsion is that in 1000-1300, solid content is 40- to the degree of polymerization through the polrvinyl chloride of emulsion method synthesis
45%；The additional amount be all with polrvinyl chloride dry calculating, its additional amount be butadiene, acrylonitrile, unsaturated carboxylic acid and
The 5~20% of esters monomer total amount.
6. a kind of preparation method of high-strength resistance to fire-retardant glove carboxylic acrylonitrile butadiene rubber latex according to claim 1, its feature exists
In：The emulsifying agent be sodium lauryl sulphate, dodecylbenzene sodium sulfonate, sodium soap, LOMAR PWA EINECS 246-676-2 acid sodium in one kind or
Several mixing.
7. a kind of preparation method of high-strength resistance to fire-retardant glove carboxylic acrylonitrile butadiene rubber latex according to claim 1, its feature exists
In：The electrolyte is one or more mixing in potassium chloride, potassium carbonate or sodium carbonate.
8. a kind of preparation method of high-strength resistance to fire-retardant glove carboxylic acrylonitrile butadiene rubber latex according to claim 1, its feature exists
In：The pH buffer is one or more mixing in sodium carbonate, sodium bicarbonate, potassium carbonate, potassium bicarbonate or potassium hydrogen phosphate.
9. a kind of preparation method of high-strength resistance to fire-retardant glove carboxylic acrylonitrile butadiene rubber latex according to claim 1, its feature exists
In：The initiator is potassium peroxydisulfate or one or two mixing in Ammonium persulfate..
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611198734.0A CN106674530A (en) | 2016-12-22 | 2016-12-22 | Preparation method of carboxylic acrylonitrile butadiene rubber latex for high-strength and flame-retardant gloves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611198734.0A CN106674530A (en) | 2016-12-22 | 2016-12-22 | Preparation method of carboxylic acrylonitrile butadiene rubber latex for high-strength and flame-retardant gloves |
Publications (1)
| Publication Number | Publication Date |
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| CN106674530A true CN106674530A (en) | 2017-05-17 |
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| CN110317380A (en) * | 2019-07-26 | 2019-10-11 | 蓝帆医疗股份有限公司 | A kind of butyronitrile gloves and preparation method thereof |
| CN110372893A (en) * | 2019-07-26 | 2019-10-25 | 蓝帆医疗股份有限公司 | A kind of butyronitrile gloves and preparation method thereof |
| CN110615924A (en) * | 2019-09-11 | 2019-12-27 | 东营九洲奥华化工有限责任公司 | Preparation method of carboxylic acrylonitrile butadiene latex for disposable gloves |
| CN111303507A (en) * | 2020-04-03 | 2020-06-19 | 明光博聚瑞新材料科技有限公司 | Method for preparing glove latex without vulcanizing agent |
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Application publication date: 20170517 |