CN107353845A - A kind of modified butadiene acrylonitrile rubber gluing agent prescription and preparation technology for being used to be bonded cloth - Google Patents

A kind of modified butadiene acrylonitrile rubber gluing agent prescription and preparation technology for being used to be bonded cloth Download PDF

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Publication number
CN107353845A
CN107353845A CN201710571990.8A CN201710571990A CN107353845A CN 107353845 A CN107353845 A CN 107353845A CN 201710571990 A CN201710571990 A CN 201710571990A CN 107353845 A CN107353845 A CN 107353845A
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China
Prior art keywords
rubber
cloth
parts
solvent
butadiene acrylonitrile
Prior art date
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Pending
Application number
CN201710571990.8A
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Chinese (zh)
Inventor
程晓亮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hefei Long-Range Glue Plastic Co Ltd
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Hefei Long-Range Glue Plastic Co Ltd
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by Hefei Long-Range Glue Plastic Co Ltd filed Critical Hefei Long-Range Glue Plastic Co Ltd
Priority to CN201710571990.8A priority Critical patent/CN107353845A/en
Publication of CN107353845A publication Critical patent/CN107353845A/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J109/00Adhesives based on homopolymers or copolymers of conjugated diene hydrocarbons
    • C09J109/02Copolymers with acrylonitrile
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00Processes of treating or compounding macromolecular substances
    • C08J3/24Crosslinking, e.g. vulcanising, of macromolecules
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02Non-macromolecular additives
    • C09J11/04Non-macromolecular additives inorganic
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02Non-macromolecular additives
    • C09J11/06Non-macromolecular additives organic
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/08Macromolecular additives
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2309/00Characterised by the use of homopolymers or copolymers of conjugated diene hydrocarbons
    • C08J2309/02Copolymers with acrylonitrile
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2461/00Characterised by the use of condensation polymers of aldehydes or ketones; Derivatives of such polymers
    • C08J2461/04Condensation polymers of aldehydes or ketones with phenols only
    • C08J2461/06Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/18Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20Oxides; Hydroxides
    • C08K3/22Oxides; Hydroxides of metals
    • C08K2003/2296Oxides; Hydroxides of metals of zinc
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00Properties
    • C08L2201/08Stabilised against heat, light or radiation or oxydation

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Inorganic Chemistry (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

The invention discloses a kind of modified butadiene acrylonitrile rubber gluing agent prescription and preparation technology for being used to be bonded cloth, it is related to rubber adhesive technical field.In the present invention:Including following raw material:Nitrile rubber, zinc oxide, stearic acid, accelerator, age resistor, carbon black, resin, solvent;The rubber of butyronitrile 40 is used including nitrile rubber, resin uses phenolic resin, and age resistor uses propylgallate, and accelerator uses dicumyl peroxide, and solvent uses methyl tert-butyl ketone solvent.The present invention is by the present invention by carrying out raw material cooperation again and proportioning to Nitrile butadiene rubber adhesive, the preparation to Nitrile butadiene rubber adhesive carries out the mixed refining process preparation manipulation of depth simultaneously, carry out the splicing operation of cloth and rubber under appropriate conditions simultaneously, so that the end properties after being glued is highly improved, the service life of rubber cloth finished product is enhanced.

Description

A kind of modified butadiene acrylonitrile rubber gluing agent prescription and preparation technology for being used to be bonded cloth
Technical field
The invention belongs to rubber adhesive technical field, more particularly to a kind of modified butadiene acrylonitrile rubber for being used to be bonded cloth Gluing agent prescription and preparation technology.
Background technology
Adhesive of the rubber-type adhesive using natural rubber or synthetic rubber as matrix.Rubber-type adhesive divide solution-type and The major class of emulsion two.Solution-type is divided to non-vulcanization type and the class of vulcanization type two again.Formed by rubber, natural rubber class, neoprene can be divided into again Rubber-like, eyeball rubber-like, polysulfide rubber class, the non-rubber-like of fourth, touch rubber-like etc..Suitable between different linear expansion coefficient materials And the lower splicing using part of dynamic.Its creep resistant, resistance to deflection, pliability, excellent in vibration resistance.But glue-joint strength is relatively low, Heat resistance is poor.The glue-joint strength and heat resistance of adhesive are lifted, is the important measures of the gluing product quality of lifter.
The content of the invention
It is an object of the invention to provide a kind of modified butadiene acrylonitrile rubber gluing agent prescription for being used to be bonded cloth and prepare work Skill, so as to improve the glue-joint strength of Nitrile butadiene rubber adhesive and heat resistance.
In order to solve the above technical problems, the present invention is achieved by the following technical solutions:
The present invention is used to be bonded the modified butadiene acrylonitrile rubber gluing agent prescription of cloth, including following raw material to be a kind of:
100 parts of nitrile rubber, zinc oxide 5-8 parts, stearic acid 1-3 parts, accelerator 2-4 parts, age resistor 1-3 parts, carbon black 40- 50 parts, resin 2-3 parts, 200 parts of solvent;
Wherein, including nitrile rubber uses the rubber of butyronitrile -40, and resin uses phenolic resin, and age resistor uses nutgall Propyl propionate, accelerator use dicumyl peroxide, and solvent uses methyl tert-butyl ketone solvent.
A kind of modified butadiene acrylonitrile rubber adhesive preparation technology for being used to be bonded cloth, including procedure below:
The first step, nitrile rubber is plasticated with certain roll spacing in groove of plasticating, keep plasticating temperature in 130-150 degree Between;
Second step, zinc oxide, stearic acid, resin are mixed, prepare and be kneaded compounding ingredient auxiliary material;
3rd step, mixing compounding ingredient auxiliary material is added in groove of plasticating and is kneaded, reinforcing agent carbon black is added and carries out mixing increasing Strong operation, then adds age resistor, adds accelerator and promotes mixing action, after the completion of to be mixed, then through certain roll spacing by fourth Nitrile rubber carries out slice operation;
4th step, chopping operations are carried out to the butyronitrile film for being kneaded slice using shredding machine, by the butyronitrile film after chopping It is put into the solvent prepared in proportion, stirring and dissolving, is configured to the glue that solids content is 20-35%.
Further, including to rubber and the bonding process of cloth:
The first step, glue is uniformly coated on unvulcanized rubber, after drying 70-80% degree, by cloth Carry out being bonded operation with the non-dry glue liquid side of rubber;
Second step, cloth and rubber are heated together and pressurizes and is vulcanized, curing temperature is maintained at 70-130 degree Between;
3rd step, vulcanization are kept for the 30-50 minutes of finished product dry after terminating, and dry and the viscous of rubber-cloth is completed after terminating Connect operation.
The invention has the advantages that:
The present invention by the present invention by carrying out raw material cooperation again and proportioning to Nitrile butadiene rubber adhesive, while to fourth The preparation of nitrile rubber adhesive carries out the mixed refining process preparation manipulation of depth, while carries out cloth and rubber under appropriate conditions Splicing operation so that the end properties after splicing is highly improved, and enhances the service life of rubber-cloth finished product.
Certainly, any product for implementing the present invention it is not absolutely required to reach all the above advantage simultaneously.
Embodiment
Technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only It is part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people All other embodiment that member is obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
The present invention is used to be bonded the modified butadiene acrylonitrile rubber gluing agent prescription of cloth, including following raw material to be a kind of:
100 parts of nitrile rubber, zinc oxide 5-8 parts, stearic acid 1-3 parts, accelerator 2-4 parts, age resistor 1-3 parts, carbon black 40- 50 parts, resin 2-3 parts, 200 parts of solvent;
Further preferably, nitrile rubber uses the rubber of butyronitrile -40, and resin uses phenolic resin, and age resistor is used and do not eaten Sub- propyl propionate, accelerator use dicumyl peroxide, and solvent uses methyl tert-butyl ketone solvent.
A kind of modified butadiene acrylonitrile rubber adhesive preparation technology for being used to be bonded cloth, including procedure below:
The first step, nitrile rubber is plasticated with certain roll spacing in groove of plasticating, keep plasticating temperature in 130-150 degree Between;
Second step, zinc oxide, stearic acid, resin are mixed, prepare and be kneaded compounding ingredient auxiliary material;
3rd step, mixing compounding ingredient auxiliary material is added in groove of plasticating and is kneaded, reinforcing agent carbon black is added and carries out mixing increasing Strong operation, then adds age resistor, adds accelerator and promotes mixing action, after the completion of to be mixed, then through certain roll spacing by fourth Nitrile rubber carries out slice operation;
4th step, chopping operations are carried out to the butyronitrile film for being kneaded slice using shredding machine, by the butyronitrile film after chopping It is put into the solvent prepared in proportion, stirring and dissolving, is configured to the glue that solids content is 20-35%.
Further, the bonding process of rubber and cloth is as follows:
The first step, glue is uniformly coated on unvulcanized rubber, after drying 70-80% degree, by cloth Carry out being bonded operation with the non-dry glue liquid side of rubber;
Second step, cloth and rubber are heated together and pressurizes and is vulcanized, curing temperature is maintained at 70-130 degree Between;
3rd step, vulcanization are kept for the 30-50 minutes of finished product dry after terminating, and dry and the viscous of rubber-cloth is completed after terminating Connect operation.
Rosin, phenolic resin etc. are mixed in nitrile rubber glue, synthetic fibers or natural fiber and leather etc. can be glued.
Make a service test contrast to modified Nitrile butadiene rubber adhesive and traditional adhesive product below:
Performance test Traditional adhesive Modified adhesive
Peel strength kN/m 2.6 3.2
72h Soak Tests Separation rate 3.3% Separation rate 2.7%
48h irradiation tests Play bag rate 4.6% Play bag rate 3.4%
From experiment as can be seen that the combination property of modified Nitrile butadiene rubber adhesive product all has a distinct increment.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means At least one implementation of the present invention is contained in reference to specific features, structure, material or the feature that the embodiment or example describe In example or example.In this manual, identical embodiment or example are not necessarily referring to the schematic representation of above-mentioned term. Moreover, specific features, structure, material or the feature of description can close in any one or more embodiments or example Suitable mode combines.
Present invention disclosed above preferred embodiment is only intended to help and illustrates the present invention.Preferred embodiment is not detailed All details are described, it is only described embodiment also not limit the invention.Obviously, according to the content of this specification, It can make many modifications and variations.This specification is chosen and specifically describes these embodiments, is to preferably explain the present invention Principle and practical application so that skilled artisan can be best understood by and utilize the present invention.The present invention is only Limited by claims and its four corner and equivalent.

Claims (4)

1. a kind of modified butadiene acrylonitrile rubber gluing agent prescription for being used to be bonded cloth, it is characterised in that including following raw material: 100 parts of nitrile rubber, zinc oxide 5-8 parts, stearic acid 1-3 parts, accelerator 2-4 parts, age resistor 1-3 parts, carbon black 40-50 parts, tree 200 parts of fat 2-3 parts, solvent.
A kind of 2. modified butadiene acrylonitrile rubber gluing agent prescription for being used to be bonded cloth according to claim 1, it is characterised in that: The rubber of butyronitrile -40 is used including nitrile rubber, resin uses phenolic resin, and age resistor uses propylgallate, accelerator Using dicumyl peroxide, solvent uses methyl tert-butyl ketone solvent.
A kind of 3. modified butadiene acrylonitrile rubber adhesive preparation technology for being used to be bonded cloth, it is characterised in that:Including procedure below:
The first step, nitrile rubber is plasticated with certain roll spacing in groove of plasticating, keep plasticating temperature 130-150 degree it Between;
Second step, zinc oxide, stearic acid, resin are mixed, prepare and be kneaded compounding ingredient auxiliary material;
3rd step, mixing compounding ingredient auxiliary material is added in groove of plasticating and is kneaded, addition reinforcing agent carbon black be kneaded strengthening and grasped Make, then add age resistor, add accelerator and promote mixing action, after the completion of to be mixed, then through certain roll spacing by butyronitrile rubber Glue carries out slice operation;
4th step, chopping operations are carried out to the butyronitrile film for being kneaded slice using shredding machine, the butyronitrile film after chopping is put into In the solvent prepared in proportion, stirring and dissolving, the glue that solids content is 20-35% is configured to.
4. a kind of modified butadiene acrylonitrile rubber adhesive preparation technology for being used to be bonded cloth according to claim 3, its feature It is:
Including the bonding process to rubber and cloth:
The first step, glue is uniformly coated on unvulcanized rubber, after drying 70-80% degree, by cloth and rubber The non-dry glue liquid side of glue product carries out fitting operation;
Second step, cloth and rubber are heated together and pressurizes and is vulcanized, curing temperature is maintained between 70-130 degree;
3rd step, vulcanization are kept for the 30-50 minutes of finished product dry after terminating, and dry the bonding behaviour that rubber-cloth is completed after terminating Make.
CN201710571990.8A 2017-07-13 2017-07-13 A kind of modified butadiene acrylonitrile rubber gluing agent prescription and preparation technology for being used to be bonded cloth Pending CN107353845A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109294517A (en) * 2018-10-22 2019-02-01 徐州双辰服饰有限公司 It is a kind of for bonding the glue gluing agent prescription of cloth
CN115386151A (en) * 2022-06-23 2022-11-25 山东王氏兄弟橡塑科技有限公司 Formula and preparation method of cross-linked liquid nitrile rubber
CN115703952A (en) * 2021-08-16 2023-02-17 广西至善新材料科技有限公司 Maleic acid single-corn starch ester modified nitrile-butadiene rubber adhesive and preparation method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101580607A (en) * 2009-03-24 2009-11-18 无锡宝通带业股份有限公司 Fire retardant cushion rubber of fire retardant canvas laminated core conveyer belt and preparation method thereof
CN101580681A (en) * 2009-03-24 2009-11-18 无锡宝通带业股份有限公司 Surface covering rubber of flame-retardant canvas laminated core conveying belt and preparation method thereof
CN102190983A (en) * 2010-03-15 2011-09-21 张耀华 Production method for nitrile butadiene rubber adhesive

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101580607A (en) * 2009-03-24 2009-11-18 无锡宝通带业股份有限公司 Fire retardant cushion rubber of fire retardant canvas laminated core conveyer belt and preparation method thereof
CN101580681A (en) * 2009-03-24 2009-11-18 无锡宝通带业股份有限公司 Surface covering rubber of flame-retardant canvas laminated core conveying belt and preparation method thereof
CN102190983A (en) * 2010-03-15 2011-09-21 张耀华 Production method for nitrile butadiene rubber adhesive

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
王孟钟等: "《胶粘剂应用手册》", 30 November 1987, 化学工业出版社 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109294517A (en) * 2018-10-22 2019-02-01 徐州双辰服饰有限公司 It is a kind of for bonding the glue gluing agent prescription of cloth
CN115703952A (en) * 2021-08-16 2023-02-17 广西至善新材料科技有限公司 Maleic acid single-corn starch ester modified nitrile-butadiene rubber adhesive and preparation method thereof
CN115386151A (en) * 2022-06-23 2022-11-25 山东王氏兄弟橡塑科技有限公司 Formula and preparation method of cross-linked liquid nitrile rubber

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Application publication date: 20171117