CN110789213A - Polyurethane and polytetrafluoroethylene compounding process - Google Patents

Polyurethane and polytetrafluoroethylene compounding process Download PDF

Info

Publication number
CN110789213A
CN110789213A CN201911086357.5A CN201911086357A CN110789213A CN 110789213 A CN110789213 A CN 110789213A CN 201911086357 A CN201911086357 A CN 201911086357A CN 110789213 A CN110789213 A CN 110789213A
Authority
CN
China
Prior art keywords
parts
polytetrafluoroethylene
polyurethane
film
compounding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201911086357.5A
Other languages
Chinese (zh)
Other versions
CN110789213B (en
Inventor
蒋盼颖
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.)
Pinghu Fangsheng Leather Co Ltd
Original Assignee
Pinghu Fangsheng Leather 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.)
Filing date
Publication date
Application filed by Pinghu Fangsheng Leather Co Ltd filed Critical Pinghu Fangsheng Leather Co Ltd
Priority to CN201911086357.5A priority Critical patent/CN110789213B/en
Publication of CN110789213A publication Critical patent/CN110789213A/en
Application granted granted Critical
Publication of CN110789213B publication Critical patent/CN110789213B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B37/1284Application of adhesive
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F283/00Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
    • C08F283/12Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polysiloxanes
    • C08F283/124Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polysiloxanes on to polysiloxanes having carbon-to-carbon double bonds
    • 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
    • C08J5/00Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18Manufacture of films or sheets
    • 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
    • C09J127/00Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Adhesives based on derivatives of such polymers
    • C09J127/02Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
    • C09J127/12Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Adhesives based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • 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
    • C08J2327/00Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
    • C08J2327/02Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2327/12Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C08J2327/18Homopolymers or copolymers of tetrafluoroethylene
    • 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
    • C08J2375/00Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2375/04Polyurethanes
    • 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
    • C08J2427/00Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
    • C08J2427/02Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2427/12Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention discloses a polyurethane and polytetrafluoroethylene compounding process, which comprises the following steps: b1, weighing polyurethane, and then preparing a PU film by injection molding; b2, weighing polytetrafluoroethylene and polychlorotrifluoroethylene, and then preparing a PTFE composite membrane by injection molding; b3, respectively passing through glue spreader to coat a high-temperature resistant adhesive on the composite bonding surface between the PU film and the PTFE composite film; b4, and then carrying out hot-pressing compounding on the PU film and the PTFE composite film through a compounding roller; and B5, sending the mixture into an oven, baking and curing the mixture, naturally cooling the mixture, and discharging the mixture. The polyurethane and polytetrafluoroethylene compounding process can well compound polyurethane and polytetrafluoroethylene together to form a composite material, and the polyurethane and polytetrafluoroethylene have large 180-degree stripping force, large adhesive force, firm compounding and bonding and good mechanical property; can be used for a long time in a high-temperature environment of 110-120 ℃.

Description

Polyurethane and polytetrafluoroethylene compounding process
Technical Field
The invention relates to the field of composite materials, in particular to a process for compounding polyurethane and polytetrafluoroethylene.
Background
Polyurethanes, which are polymers containing urethane groups in the main chain of a macromolecule, are called polyurethanes, and are classified into two major classes, polyester polyurethanes and polyether polyurethanes. Polyurethanes have many excellent properties and therefore have a wide range of uses.
Polytetrafluoroethylene (abbreviated as PTFE), is commonly referred to as a "non-stick coating" or "easy-to-clean material". The material has the characteristics of acid resistance, alkali resistance and various organic solvents resistance, and is almost insoluble in all solvents. Meanwhile, the polytetrafluoroethylene has the characteristic of high temperature resistance, has extremely low friction coefficient, can be used for lubricating, and becomes an ideal coating for easily cleaning the inner layer of the water pipe.
The application of any material has its limitations, and the development of composite technology integrates the advantages of different materials and improves the resistance of a single material to its working environment. The polyurethane material has excellent wear resistance, but has high friction coefficient, large internal heat generation, poor heat conduction effect of a contact surface and rapid heat accumulation, so that the mechanical property of the polyurethane material is reduced. The PTFE material has the advantages of heat resistance of more than 200 ℃, low friction coefficient, good heat conductivity, poor elastic property and easy plastic deformation or fragmentation.
At present, the domestic research on the polyurethane and PTFE composite process is still in the laboratory stage and does not meet the requirement of industrial mass production. The main reasons for such phenomena are that the polyurethane materials are not applied to a deep degree, are not sufficiently researched for diversified applications, and have high cost, so that the polyurethane materials mostly stay in the theoretical stage of a laboratory. The research aims to solve the industrial production demand of the polyurethane and PTFE composite process and realize the breakthrough of the composite process from an experimental theory stage to an actual application stage.
Based on the situation, the invention provides a polyurethane and polytetrafluoroethylene composite process, which can enable the product to be used for a long time in a high-temperature environment of 110-120 ℃ and can effectively solve the problems.
Disclosure of Invention
The invention aims to provide a composite process of polyurethane and polytetrafluoroethylene. The polyurethane and polytetrafluoroethylene compounding process can well compound polyurethane and polytetrafluoroethylene together to form a composite material, and the polyurethane and polytetrafluoroethylene have large 180-degree stripping force, large adhesive force, firm compounding and bonding and good mechanical property; the advantages of two different materials of polyurethane and polytetrafluoroethylene can be integrated, the resistance of a single material to the working environment of the single material is improved, and the material can be used for a long time in a high-temperature environment of 110-120 ℃.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a composite process of polyurethane and polytetrafluoroethylene comprises the following steps:
b1, weighing polyurethane, drying at 120-125 ℃ in vacuum until the water content is less than 50ug/g, feeding into a single-screw extruder for melting, and then preparing a PU film by injection molding;
b2, weighing polytetrafluoroethylene and polytrifluorochloroethylene, drying at 120-125 ℃ in vacuum until the water content is less than 50ug/g, feeding into a double-screw extruder for melting and mixing, and then preparing a PTFE composite membrane by injection molding;
b3, naturally cooling the PU film and the PTFE composite film to 50-55 ℃, and stretching and shaping; then respectively passing through glue spreader rollers to coat a high-temperature resistant adhesive on the composite bonding surface between the PU film and the PTFE composite film;
b4, carrying out hot-pressing compounding on the PU film and the PTFE composite film through a compounding roller to obtain a composite film of polyurethane and polytetrafluoroethylene;
and B5, feeding the composite film of polyurethane and polytetrafluoroethylene into an oven, baking and curing, naturally cooling, and discharging to complete the compounding of polyurethane and polytetrafluoroethylene.
The polyurethane and polytetrafluoroethylene compounding process can well compound polyurethane and polytetrafluoroethylene together to form a composite material, and the polyurethane and polytetrafluoroethylene have large 180-degree stripping force, large adhesive force, firm compounding and bonding and good mechanical property; the advantages of two different materials of polyurethane and polytetrafluoroethylene can be integrated, the resistance of a single material to the working environment of the single material is improved, and the material can be used for a long time in a high-temperature environment of 110-120 ℃.
The preparation process is simple, the operation is simple and convenient, and the manpower and equipment cost are saved.
Preferably, in the step B2, the weighing of polytetrafluoroethylene and polychlorotrifluoroethylene is specifically to weigh 92 to 96 parts by weight of polytetrafluoroethylene and 4 to 8 parts by weight of polychlorotrifluoroethylene.
Preferably, in step B3, the high temperature resistant adhesive is prepared from the following raw materials in parts by weight: 12-14 parts of dimethyl acryloyl oxyethyl polysiloxane, 10-13 parts of acrylamide, 7-10 parts of tripropylene glycol diacrylate, 8-12 parts of isodecyl acrylate, 35-40 parts of butanone, 1.1-1.5 parts of azobisisobutyronitrile, 0.6-0.8 part of dodecyl mercaptan, 3-5 parts of 2-methyl-1, 8-octanediol, 15-20 parts of polychlorotrifluoroethylene powder and 2-3 parts of diphenylmethane diisocyanate.
Preferably, in step B3, the high temperature resistant adhesive is prepared from the following raw materials in parts by weight: 13 parts of dimethyl acryloyl oxyethyl polysiloxane, 12.1 parts of acrylamide, 8.5 parts of tripropylene glycol diacrylate, 10.3 parts of isodecyl acrylate, 37 parts of butanone, 1.3 parts of azodiisobutyronitrile, 0.7 part of dodecanethiol, 4.2 parts of 2-methyl-1, 8-octanediol, 17.8 parts of polychlorotrifluoroethylene powder and 2.6 parts of diphenylmethane diisocyanate.
Preferably, in step B3, the preparation method of the high temperature resistant adhesive comprises the following steps:
s1, weighing the following components in parts by weight: dimethyl acryloxyethyl polysiloxane, acrylamide, tripropylene glycol diacrylate, isodecyl acrylate, butanone, azobisisobutyronitrile, dodecanethiol, 2-methyl-1, 8-octanediol, polychlorotrifluoroethylene powder, and diphenylmethane diisocyanate;
s2, putting dimethyl acryloyloxyethyl polysiloxane, acrylamide, tripropylene glycol diacrylate, isodecyl acrylate and butanone into a reaction kettle, stirring, mixing, vacuumizing, dissolving to form a uniform solution, dissolving azobisisobutyronitrile and dodecanethiol with a small amount of butanone respectively, heating to 79-81 ℃, dissolving azobisisobutyronitrile and dodecanethiol with a small amount of butanone respectively, beginning to dropwise add azobisisobutyronitrile and dodecanethiol, keeping 79-81 ℃ after dropwise adding is completed within 30-40 min, continuing to react for 5-7 h, and discharging to obtain a high-temperature resistant adhesive semi-finished product solution;
s3, cooling the semi-finished product solution of the high-temperature resistant adhesive to 50-55 ℃, adding polychlorotrifluoroethylene powder, stirring at a high speed of 2000-2500 rpm, and vacuumizing to uniformly suspend and disperse the polychlorotrifluoroethylene powder in the semi-finished product solution of the high-temperature resistant adhesive; continuously stirring and adding 2-methyl-1, 8-octanediol, and uniformly mixing to obtain the high-temperature resistant adhesive; when in use, the diphenylmethane diisocyanate is added and mixed evenly.
Preferably, in the step B4, the rolling pressure for the hot-press compounding is 0.4 to 0.5 MPa.
Preferably, in the step B5, the baking and curing temperature is 75-85 ℃, and the baking time is 15-20 min.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the polyurethane and polytetrafluoroethylene compounding process can well compound polyurethane and polytetrafluoroethylene together to form a composite material, and the polyurethane and polytetrafluoroethylene have large 180-degree stripping force, large adhesive force, firm compounding and bonding and good mechanical property; the advantages of two different materials of polyurethane and polytetrafluoroethylene can be integrated, the resistance of a single material to the working environment of the single material is improved, and the material can be used for a long time in a high-temperature environment of 110-120 ℃.
The high-temperature-resistant adhesive disclosed by the invention is prepared by copolymerizing dimethyl acryloyloxyethyl polysiloxane, acrylamide, tripropylene glycol diacrylate and isodecyl acrylate serving as raw materials to obtain a copolymer adhesive, and the copolymer adhesive is good in heat resistance and strong in cohesiveness; the addition of the polychlorotrifluoroethylene powder can improve the fluidity of the high-temperature resistant adhesive in the invention and can improve the bonding force with the polytetrafluoroethylene film; the addition of 2-methyl-1, 8-octanediol and diphenylmethane diisocyanate moderately crosslinks the high temperature resistant adhesive of the present invention, further improving the adhesive strength and cohesive strength.
The preparation process is simple, the operation is simple and convenient, and the manpower and equipment cost are saved.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in connection with specific examples, which should not be construed as limiting the present patent.
The test methods or test methods described in the following examples are conventional methods unless otherwise specified; the reagents and materials, unless otherwise indicated, are conventionally obtained commercially or prepared by conventional methods.
Example 1:
a composite process of polyurethane and polytetrafluoroethylene comprises the following steps:
b1, weighing polyurethane, drying at 120-125 ℃ in vacuum until the water content is less than 50ug/g, feeding into a single-screw extruder for melting, and then preparing a PU film by injection molding;
b2, weighing polytetrafluoroethylene and polytrifluorochloroethylene, drying at 120-125 ℃ in vacuum until the water content is less than 50ug/g, feeding into a double-screw extruder for melting and mixing, and then preparing a PTFE composite membrane by injection molding;
b3, naturally cooling the PU film and the PTFE composite film to 50-55 ℃, and stretching and shaping; then respectively passing through glue spreader rollers to coat a high-temperature resistant adhesive on the composite bonding surface between the PU film and the PTFE composite film;
b4, carrying out hot-pressing compounding on the PU film and the PTFE composite film through a compounding roller to obtain a composite film of polyurethane and polytetrafluoroethylene;
and B5, feeding the composite film of polyurethane and polytetrafluoroethylene into an oven, baking and curing, naturally cooling, and discharging to complete the compounding of polyurethane and polytetrafluoroethylene.
Preferably, in the step B2, the weighing of polytetrafluoroethylene and polychlorotrifluoroethylene is specifically to weigh 92 to 96 parts by weight of polytetrafluoroethylene and 4 to 8 parts by weight of polychlorotrifluoroethylene.
Preferably, in step B3, the high temperature resistant adhesive is prepared from the following raw materials in parts by weight: 12-14 parts of dimethyl acryloyl oxyethyl polysiloxane, 10-13 parts of acrylamide, 7-10 parts of tripropylene glycol diacrylate, 8-12 parts of isodecyl acrylate, 35-40 parts of butanone, 1.1-1.5 parts of azobisisobutyronitrile, 0.6-0.8 part of dodecyl mercaptan, 3-5 parts of 2-methyl-1, 8-octanediol, 15-20 parts of polychlorotrifluoroethylene powder and 2-3 parts of diphenylmethane diisocyanate.
Preferably, in step B3, the high temperature resistant adhesive is prepared from the following raw materials in parts by weight: 13 parts of dimethyl acryloyl oxyethyl polysiloxane, 12.1 parts of acrylamide, 8.5 parts of tripropylene glycol diacrylate, 10.3 parts of isodecyl acrylate, 37 parts of butanone, 1.3 parts of azodiisobutyronitrile, 0.7 part of dodecanethiol, 4.2 parts of 2-methyl-1, 8-octanediol, 17.8 parts of polychlorotrifluoroethylene powder and 2.6 parts of diphenylmethane diisocyanate.
Preferably, in step B3, the preparation method of the high temperature resistant adhesive comprises the following steps:
s1, weighing the following components in parts by weight: dimethyl acryloxyethyl polysiloxane, acrylamide, tripropylene glycol diacrylate, isodecyl acrylate, butanone, azobisisobutyronitrile, dodecanethiol, 2-methyl-1, 8-octanediol, polychlorotrifluoroethylene powder, and diphenylmethane diisocyanate;
s2, putting dimethyl acryloyloxyethyl polysiloxane, acrylamide, tripropylene glycol diacrylate, isodecyl acrylate and butanone into a reaction kettle, stirring, mixing, vacuumizing, dissolving to form a uniform solution, dissolving azobisisobutyronitrile and dodecanethiol with a small amount of butanone respectively, heating to 79-81 ℃, dissolving azobisisobutyronitrile and dodecanethiol with a small amount of butanone respectively, beginning to dropwise add azobisisobutyronitrile and dodecanethiol, keeping 79-81 ℃ after dropwise adding is completed within 30-40 min, continuing to react for 5-7 h, and discharging to obtain a high-temperature resistant adhesive semi-finished product solution;
s3, cooling the semi-finished product solution of the high-temperature resistant adhesive to 50-55 ℃, adding polychlorotrifluoroethylene powder, stirring at a high speed of 2000-2500 rpm, and vacuumizing to uniformly suspend and disperse the polychlorotrifluoroethylene powder in the semi-finished product solution of the high-temperature resistant adhesive; continuously stirring and adding 2-methyl-1, 8-octanediol, and uniformly mixing to obtain the high-temperature resistant adhesive; when in use, the diphenylmethane diisocyanate is added and mixed evenly.
Preferably, in the step B4, the rolling pressure for the hot-press compounding is 0.4 to 0.5 MPa.
Preferably, in the step B5, the baking and curing temperature is 75-85 ℃, and the baking time is 15-20 min.
Example 2:
a composite process of polyurethane and polytetrafluoroethylene comprises the following steps:
b1, weighing polyurethane, drying at 120 ℃ in vacuum until the water content is less than 50ug/g, feeding the polyurethane into a single-screw extruder for melting, and then preparing a PU film by injection molding;
b2, weighing polytetrafluoroethylene and polytrifluorochloroethylene, drying at 120 ℃ in vacuum until the water content is less than 50ug/g, sending the mixture into a double-screw extruder for melting and mixing, and then preparing the PTFE composite membrane by injection molding;
b3, naturally cooling the PU film and the PTFE composite film to 50 ℃, and stretching and shaping; then respectively passing through glue spreader rollers to coat a high-temperature resistant adhesive on the composite bonding surface between the PU film and the PTFE composite film;
b4, carrying out hot-pressing compounding on the PU film and the PTFE composite film through a compounding roller to obtain a composite film of polyurethane and polytetrafluoroethylene;
and B5, feeding the composite film of polyurethane and polytetrafluoroethylene into an oven, baking and curing, naturally cooling, and discharging to complete the compounding of polyurethane and polytetrafluoroethylene.
In this embodiment, in step B2, the weighing of polytetrafluoroethylene and polychlorotrifluoroethylene is specifically weighing 92 parts by weight of polytetrafluoroethylene and 4 parts by weight of polychlorotrifluoroethylene.
In this embodiment, in step B3, the high temperature resistant adhesive is made from the following raw materials in parts by weight: 12 parts of dimethyl acryloyl oxyethyl polysiloxane, 10 parts of acrylamide, 7 parts of tripropylene glycol diacrylate, 8 parts of isodecyl acrylate, 35 parts of butanone, 1.1 parts of azobisisobutyronitrile, 0.6 part of dodecanethiol, 3 parts of 2-methyl-1, 8-octanediol, 15 parts of polychlorotrifluoroethylene powder and 2 parts of diphenylmethane diisocyanate.
In this embodiment, in step B3, the preparation method of the high temperature resistant adhesive includes the following steps:
s1, weighing the following components in parts by weight: dimethyl acryloxyethyl polysiloxane, acrylamide, tripropylene glycol diacrylate, isodecyl acrylate, butanone, azobisisobutyronitrile, dodecanethiol, 2-methyl-1, 8-octanediol, polychlorotrifluoroethylene powder, and diphenylmethane diisocyanate;
s2, putting dimethyl acryloyloxyethyl polysiloxane, acrylamide, tripropylene glycol diacrylate, isodecyl acrylate and butanone into a reaction kettle, stirring, mixing, vacuumizing, dissolving to form a uniform solution, dissolving azobisisobutyronitrile and dodecanethiol with a small amount of butanone respectively, heating to 79 ℃, dissolving azobisisobutyronitrile and dodecanethiol with a small amount of butanone respectively, beginning to dropwise add azobisisobutyronitrile and dodecanethiol, keeping 79 ℃ after 40min dropwise addition is finished, continuing to react for 7h, and discharging to obtain a high-temperature-resistant adhesive semi-finished product solution;
s3, cooling the high-temperature-resistant adhesive semi-finished product solution to 50 ℃, adding polychlorotrifluoroethylene powder, stirring at a high speed of 2500rpm, and vacuumizing to uniformly suspend and disperse the polychlorotrifluoroethylene powder in the high-temperature-resistant adhesive semi-finished product solution; continuously stirring and adding 2-methyl-1, 8-octanediol, and uniformly mixing to obtain the high-temperature resistant adhesive; when in use, the diphenylmethane diisocyanate is added and mixed evenly.
In this example, in step B4, the rolling pressure for hot press compounding was 0.4 MPa.
In this embodiment, in step B5, the temperature for baking and curing is 75 ℃, and the baking time is 20 min.
Tests show that the 180-degree peeling force between the PU film and the PTFE composite film is 26.7N/25mm, and the adhesive force is 55.3N/25mm in the polyurethane and polytetrafluoroethylene composite film prepared by the polyurethane and polytetrafluoroethylene composite process of the embodiment; can be used for a long time in a high-temperature environment of 110-120 ℃.
Example 3:
a composite process of polyurethane and polytetrafluoroethylene comprises the following steps:
b1, weighing polyurethane, drying at 125 ℃ in vacuum until the water content is less than 50ug/g, feeding the polyurethane into a single-screw extruder for melting, and then preparing a PU film by injection molding;
b2, weighing polytetrafluoroethylene and polytrifluorochloroethylene, drying at 125 ℃ in vacuum until the water content is less than 50ug/g, then sending into a double-screw extruder for melting and mixing, and then preparing a PTFE composite membrane by injection molding;
b3, naturally cooling the PU film and the PTFE composite film to 55 ℃, and stretching and shaping; then respectively passing through glue spreader rollers to coat a high-temperature resistant adhesive on the composite bonding surface between the PU film and the PTFE composite film;
b4, carrying out hot-pressing compounding on the PU film and the PTFE composite film through a compounding roller to obtain a composite film of polyurethane and polytetrafluoroethylene;
and B5, feeding the composite film of polyurethane and polytetrafluoroethylene into an oven, baking and curing, naturally cooling, and discharging to complete the compounding of polyurethane and polytetrafluoroethylene.
In this embodiment, in step B2, the weighing of polytetrafluoroethylene and polychlorotrifluoroethylene is specifically weighing 96 parts by weight of polytetrafluoroethylene and 8 parts by weight of polychlorotrifluoroethylene.
In this embodiment, in step B3, the high temperature resistant adhesive is made from the following raw materials in parts by weight: 14 parts of dimethyl acryloyl oxyethyl polysiloxane, 13 parts of acrylamide, 10 parts of tripropylene glycol diacrylate, 12 parts of isodecyl acrylate, 40 parts of butanone, 1.5 parts of azobisisobutyronitrile, 0.8 part of dodecanethiol, 5 parts of 2-methyl-1, 8-octanediol, 20 parts of polychlorotrifluoroethylene powder and 3 parts of diphenylmethane diisocyanate.
In this embodiment, in step B3, the preparation method of the high temperature resistant adhesive includes the following steps:
s1, weighing the following components in parts by weight: dimethyl acryloxyethyl polysiloxane, acrylamide, tripropylene glycol diacrylate, isodecyl acrylate, butanone, azobisisobutyronitrile, dodecanethiol, 2-methyl-1, 8-octanediol, polychlorotrifluoroethylene powder, and diphenylmethane diisocyanate;
s2, putting dimethyl acryloyloxyethyl polysiloxane, acrylamide, tripropylene glycol diacrylate, isodecyl acrylate and butanone into a reaction kettle, stirring, mixing, vacuumizing, dissolving to form a uniform solution, dissolving azobisisobutyronitrile and dodecanethiol with a small amount of butanone respectively, heating to 81 ℃, dissolving azobisisobutyronitrile and dodecanethiol with a small amount of butanone respectively, beginning to dropwise add azobisisobutyronitrile and dodecanethiol, keeping the temperature at 81 ℃ after 30min dropwise addition is finished, continuing to react for 5h, and discharging to obtain a high-temperature-resistant adhesive semi-finished product solution;
s3, cooling the high-temperature resistant adhesive semi-finished product solution to 55 ℃, adding polychlorotrifluoroethylene powder, stirring at a high speed of 2000rpm and vacuumizing to uniformly suspend and disperse the polychlorotrifluoroethylene powder in the high-temperature resistant adhesive semi-finished product solution; continuously stirring and adding 2-methyl-1, 8-octanediol, and uniformly mixing to obtain the high-temperature resistant adhesive; when in use, the diphenylmethane diisocyanate is added and mixed evenly.
In this example, in step B4, the rolling pressure for hot press compounding was 0.5 MPa.
In this embodiment, in step B5, the temperature for baking and curing is 85 ℃, and the baking time is 15 min.
Tests show that the 180-degree peeling force between the PU film and the PTFE composite film is 27.8N/25mm, and the adhesive force is 57.2N/25mm in the polyurethane and polytetrafluoroethylene composite film prepared by the polyurethane and polytetrafluoroethylene composite process of the embodiment; can be used for a long time in a high-temperature environment of 110-120 ℃.
Example 4:
a composite process of polyurethane and polytetrafluoroethylene comprises the following steps:
b1, weighing polyurethane, drying at 122 ℃ in vacuum until the water content is less than 50ug/g, feeding the polyurethane into a single-screw extruder for melting, and then preparing a PU film by injection molding;
b2, weighing polytetrafluoroethylene and polytrifluorochloroethylene, drying at 122 ℃ in vacuum until the water content is less than 50ug/g, then sending into a double-screw extruder for melting and mixing, and then preparing a PTFE composite membrane by injection molding;
b3, naturally cooling the PU film and the PTFE composite film to 52 ℃, and stretching and shaping; then respectively passing through glue spreader rollers to coat a high-temperature resistant adhesive on the composite bonding surface between the PU film and the PTFE composite film;
b4, carrying out hot-pressing compounding on the PU film and the PTFE composite film through a compounding roller to obtain a composite film of polyurethane and polytetrafluoroethylene;
and B5, feeding the composite film of polyurethane and polytetrafluoroethylene into an oven, baking and curing, naturally cooling, and discharging to complete the compounding of polyurethane and polytetrafluoroethylene.
In this embodiment, in step B2, the weighing of polytetrafluoroethylene and polychlorotrifluoroethylene is specifically weighing 94 parts by weight of polytetrafluoroethylene and 6 parts by weight of polychlorotrifluoroethylene.
In this embodiment, in step B3, the high temperature resistant adhesive is made from the following raw materials in parts by weight: 13 parts of dimethyl acryloyl oxyethyl polysiloxane, 12.1 parts of acrylamide, 8.5 parts of tripropylene glycol diacrylate, 10.3 parts of isodecyl acrylate, 37 parts of butanone, 1.3 parts of azodiisobutyronitrile, 0.7 part of dodecanethiol, 4.2 parts of 2-methyl-1, 8-octanediol, 17.8 parts of polychlorotrifluoroethylene powder and 2.6 parts of diphenylmethane diisocyanate.
In this embodiment, in step B3, the preparation method of the high temperature resistant adhesive includes the following steps:
s1, weighing the following components in parts by weight: dimethyl acryloxyethyl polysiloxane, acrylamide, tripropylene glycol diacrylate, isodecyl acrylate, butanone, azobisisobutyronitrile, dodecanethiol, 2-methyl-1, 8-octanediol, polychlorotrifluoroethylene powder, and diphenylmethane diisocyanate;
s2, putting dimethyl acryloyloxyethyl polysiloxane, acrylamide, tripropylene glycol diacrylate, isodecyl acrylate and butanone into a reaction kettle, stirring, mixing, vacuumizing, dissolving to form a uniform solution, dissolving azobisisobutyronitrile and dodecanethiol with a small amount of butanone respectively, heating to 80 ℃, dissolving azobisisobutyronitrile and dodecanethiol with a small amount of butanone respectively, beginning to dropwise add azobisisobutyronitrile and dodecanethiol, keeping 80 ℃ after 35min dropwise addition is finished, continuing to react for 6h, and discharging to obtain a high-temperature-resistant adhesive semi-finished product solution;
s3, cooling the high-temperature-resistant adhesive semi-finished product solution to 52 ℃, adding polychlorotrifluoroethylene powder, stirring at a high speed of 2200rpm, and vacuumizing to uniformly suspend and disperse the polychlorotrifluoroethylene powder in the high-temperature-resistant adhesive semi-finished product solution; continuously stirring and adding 2-methyl-1, 8-octanediol, and uniformly mixing to obtain the high-temperature resistant adhesive; when in use, the diphenylmethane diisocyanate is added and mixed evenly.
In this example, in step B4, the rolling pressure for hot press compounding was 0.45 MPa.
In this embodiment, in step B5, the temperature for baking and curing is 80 ℃, and the baking time is 18 min.
Tests show that the 180-degree peeling force between the PU film and the PTFE composite film is 28.1N/25mm, and the adhesive force is 57.8N/25mm in the polyurethane and polytetrafluoroethylene composite film prepared by the polyurethane and polytetrafluoroethylene composite process in the embodiment; can be used for a long time in a high-temperature environment of 110-120 ℃.
The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.

Claims (7)

1. A composite process of polyurethane and polytetrafluoroethylene is characterized by comprising the following steps:
b1, weighing polyurethane, drying at 120-125 ℃ in vacuum until the water content is less than 50ug/g, feeding into a single-screw extruder for melting, and then preparing a PU film by injection molding;
b2, weighing polytetrafluoroethylene and polytrifluorochloroethylene, drying at 120-125 ℃ in vacuum until the water content is less than 50ug/g, feeding into a double-screw extruder for melting and mixing, and then preparing a PTFE composite membrane by injection molding;
b3, naturally cooling the PU film and the PTFE composite film to 50-55 ℃, and stretching and shaping; then respectively passing through glue spreader rollers to coat a high-temperature resistant adhesive on the composite bonding surface between the PU film and the PTFE composite film;
b4, carrying out hot-pressing compounding on the PU film and the PTFE composite film through a compounding roller to obtain a composite film of polyurethane and polytetrafluoroethylene;
and B5, feeding the composite film of polyurethane and polytetrafluoroethylene into an oven, baking and curing, naturally cooling, and discharging to complete the compounding of polyurethane and polytetrafluoroethylene.
2. The process of claim 1, wherein in step B2, the polytetrafluoroethylene and the polychlorotrifluoroethylene are weighed, specifically, 92 to 96 parts by weight of polytetrafluoroethylene and 4 to 8 parts by weight of polychlorotrifluoroethylene are weighed.
3. The process of claim 1, wherein in step B3, the high temperature adhesive is prepared from the following raw materials in parts by weight: 12-14 parts of dimethyl acryloyl oxyethyl polysiloxane, 10-13 parts of acrylamide, 7-10 parts of tripropylene glycol diacrylate, 8-12 parts of isodecyl acrylate, 35-40 parts of butanone, 1.1-1.5 parts of azobisisobutyronitrile, 0.6-0.8 part of dodecyl mercaptan, 3-5 parts of 2-methyl-1, 8-octanediol, 15-20 parts of polychlorotrifluoroethylene powder and 2-3 parts of diphenylmethane diisocyanate.
4. The process of claim 1, wherein in step B3, the high temperature adhesive is prepared from the following raw materials in parts by weight: 13 parts of dimethyl acryloyl oxyethyl polysiloxane, 12.1 parts of acrylamide, 8.5 parts of tripropylene glycol diacrylate, 10.3 parts of isodecyl acrylate, 37 parts of butanone, 1.3 parts of azodiisobutyronitrile, 0.7 part of dodecanethiol, 4.2 parts of 2-methyl-1, 8-octanediol, 17.8 parts of polychlorotrifluoroethylene powder and 2.6 parts of diphenylmethane diisocyanate.
5. The process for compounding polyurethane and polytetrafluoroethylene according to any one of claims 2 or 3, wherein in step B3, said high temperature adhesive is prepared by a method comprising the following steps:
s1, weighing the following components in parts by weight: dimethyl acryloxyethyl polysiloxane, acrylamide, tripropylene glycol diacrylate, isodecyl acrylate, butanone, azobisisobutyronitrile, dodecanethiol, 2-methyl-1, 8-octanediol, polychlorotrifluoroethylene powder, and diphenylmethane diisocyanate;
s2, putting dimethyl acryloyloxyethyl polysiloxane, acrylamide, tripropylene glycol diacrylate, isodecyl acrylate and butanone into a reaction kettle, stirring, mixing, vacuumizing, dissolving to form a uniform solution, dissolving azobisisobutyronitrile and dodecanethiol with a small amount of butanone respectively, heating to 79-81 ℃, dissolving azobisisobutyronitrile and dodecanethiol with a small amount of butanone respectively, beginning to dropwise add azobisisobutyronitrile and dodecanethiol, keeping 79-81 ℃ after dropwise adding is completed within 30-40 min, continuing to react for 5-7 h, and discharging to obtain a high-temperature resistant adhesive semi-finished product solution;
s3, cooling the semi-finished product solution of the high-temperature resistant adhesive to 50-55 ℃, adding polychlorotrifluoroethylene powder, stirring at a high speed of 2000-2500 rpm, and vacuumizing to uniformly suspend and disperse the polychlorotrifluoroethylene powder in the semi-finished product solution of the high-temperature resistant adhesive; continuously stirring and adding 2-methyl-1, 8-octanediol, and uniformly mixing to obtain the high-temperature resistant adhesive; when in use, the diphenylmethane diisocyanate is added and mixed evenly.
6. The process of claim 1, wherein in step B4, the roller pressure for hot-pressing is 0.4-0.5 MPa.
7. The process of claim 1, wherein in step B5, the temperature for baking and curing is 75-85 ℃ and the baking time is 15-20 min.
CN201911086357.5A 2019-11-08 2019-11-08 Polyurethane and polytetrafluoroethylene compounding process Active CN110789213B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911086357.5A CN110789213B (en) 2019-11-08 2019-11-08 Polyurethane and polytetrafluoroethylene compounding process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911086357.5A CN110789213B (en) 2019-11-08 2019-11-08 Polyurethane and polytetrafluoroethylene compounding process

Publications (2)

Publication Number Publication Date
CN110789213A true CN110789213A (en) 2020-02-14
CN110789213B CN110789213B (en) 2021-11-02

Family

ID=69443500

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911086357.5A Active CN110789213B (en) 2019-11-08 2019-11-08 Polyurethane and polytetrafluoroethylene compounding process

Country Status (1)

Country Link
CN (1) CN110789213B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112549714A (en) * 2020-11-23 2021-03-26 北京东方雨虹防水技术股份有限公司 Polytetrafluoroethylene composite isolation material, preparation method thereof and self-adhesive asphalt waterproof coiled material
CN113500794A (en) * 2021-07-14 2021-10-15 苏州巷尔电子材料有限公司 Processing method of acoustic composite membrane material

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006305937A (en) * 2005-04-28 2006-11-09 Sumitomo Electric Fine Polymer Inc Manufacturing method of composite material and composite material
CN103660464A (en) * 2012-09-13 2014-03-26 平松产业株式会社 Waterproof moisture-permeable composite film and waterproof moisture-permeable cloth with same
CN104093781A (en) * 2012-02-23 2014-10-08 东丽薄膜先端加工股份有限公司 Fluororesin film
CN205512547U (en) * 2016-03-10 2016-08-31 三六一度(中国)有限公司 Frivolous comfortable easy dress
CN107618189A (en) * 2017-10-16 2018-01-23 广州钰鑫新材料有限公司 A kind of waterproof TPU film

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006305937A (en) * 2005-04-28 2006-11-09 Sumitomo Electric Fine Polymer Inc Manufacturing method of composite material and composite material
CN104093781A (en) * 2012-02-23 2014-10-08 东丽薄膜先端加工股份有限公司 Fluororesin film
CN103660464A (en) * 2012-09-13 2014-03-26 平松产业株式会社 Waterproof moisture-permeable composite film and waterproof moisture-permeable cloth with same
CN205512547U (en) * 2016-03-10 2016-08-31 三六一度(中国)有限公司 Frivolous comfortable easy dress
CN107618189A (en) * 2017-10-16 2018-01-23 广州钰鑫新材料有限公司 A kind of waterproof TPU film

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112549714A (en) * 2020-11-23 2021-03-26 北京东方雨虹防水技术股份有限公司 Polytetrafluoroethylene composite isolation material, preparation method thereof and self-adhesive asphalt waterproof coiled material
CN113500794A (en) * 2021-07-14 2021-10-15 苏州巷尔电子材料有限公司 Processing method of acoustic composite membrane material

Also Published As

Publication number Publication date
CN110789213B (en) 2021-11-02

Similar Documents

Publication Publication Date Title
CN110789213B (en) Polyurethane and polytetrafluoroethylene compounding process
CN101580680B (en) Crosslinkable polyethylene hot-melt adhesive composition and preparation method and application thereof
CN103275448B (en) Preparation method of modified packing ion enhanced polytetrafluoroethylene composite
CN103333442B (en) TiO 2the preparation method of-SiC-fibre filling polytetrafluoroethyland matrix material
CN102010547A (en) Mineral/long glass fiber reinforced polypropylene composite material and preparation method thereof
CN101831173A (en) Bi-phthalonitrile resin glass fiber composite material toughened by poly(arylene ether nitrile) and preparation method thereof
CN113278115B (en) Core-shell polymer and preparation method and application thereof
CN102942790A (en) High temperature-resistant high-strength polyphenylene sulfide-based reactively reinforced and toughened composite material
CN115124776B (en) Natural bamboo fiber modified PE or PP composite material and preparation method thereof
CN111548544A (en) High-temperature-resistant stable protective film material and preparation method thereof
CN108822478A (en) Anti-scratch high-light ABS/PMMA material and its preparation process
CN103319824A (en) Method for preparing modified and enhanced polytetrafluoroethylene composite material
CN110128597A (en) A kind of low temperature moulding self-lubricating material and preparation method thereof
CN112980376A (en) Waterborne polyurethane adhesive and preparation method thereof
CN114031790B (en) Drag-reduction type rapid self-healing hydrogel and preparation method thereof
CN107828349B (en) A kind of preparation method of composite type self-adhesion waterproof roll
CN107541048B (en) A kind of preparation method of dimethyl silicone polymer toughening poly (arylene ether nitrile) composite material
CN101890778B (en) High resilience nylon pipe containing high lubricating powder and preparation method thereof
CN106366223A (en) Method for preparing CPVC impact modifier
CN102643371B (en) Method for preparing polyethylene wax containing phenoxy group at chain end by thermal degradation
CN108504097B (en) PPS composite material and preparation method thereof
CN104031343A (en) Heat-resisting ageing resistant material and preparation method thereof
CN114437621B (en) Solvent-free single-component polyurethane waterproof coating and preparation method thereof
CN116814024B (en) Resin composite material and preparation method thereof
CN115926418B (en) Chemical-resistant and high-temperature-resistant basalt fiber composite material

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
PE01 Entry into force of the registration of the contract for pledge of patent right
PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of invention: A composite process of polyurethane and polytetrafluoroethylene

Effective date of registration: 20230824

Granted publication date: 20211102

Pledgee: Pinghu Rural Commercial Bank of Zhejiang, Limited by Share Ltd.

Pledgor: Pinghu Fangsheng Leather Co.,Ltd.

Registration number: Y2023980053662