GB2098533A - Body manufactured by compression under pressure at raised temperature - Google Patents

Body manufactured by compression under pressure at raised temperature Download PDF

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Publication number
GB2098533A
GB2098533A GB8115432A GB8115432A GB2098533A GB 2098533 A GB2098533 A GB 2098533A GB 8115432 A GB8115432 A GB 8115432A GB 8115432 A GB8115432 A GB 8115432A GB 2098533 A GB2098533 A GB 2098533A
Authority
GB
United Kingdom
Prior art keywords
body according
rubber particles
rubber
molecule chains
plastics material
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
GB8115432A
Other versions
GB2098533B (en
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.)
JLP PRODUCTS AB
Original Assignee
JLP PRODUCTS AB
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 JLP PRODUCTS AB filed Critical JLP PRODUCTS AB
Priority to DE3120101A priority Critical patent/DE3120101A1/en
Priority to GB8115432A priority patent/GB2098533B/en
Priority to NL8102568A priority patent/NL8102568A/en
Priority to FR8110784A priority patent/FR2506665B1/en
Publication of GB2098533A publication Critical patent/GB2098533A/en
Application granted granted Critical
Publication of GB2098533B publication Critical patent/GB2098533B/en
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J11/00—Recovery or working-up of waste materials
    • C08J11/04—Recovery or working-up of waste materials of polymers
    • C08J11/06—Recovery or working-up of waste materials of polymers without chemical reactions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/0026—Recovery of plastics or other constituents of waste material containing plastics by agglomeration or compacting
    • B29B17/0042—Recovery of plastics or other constituents of waste material containing plastics by agglomeration or compacting for shaping parts, e.g. multilayered parts with at least one layer containing regenerated plastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/003—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor characterised by the choice of material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/005—Processes for mixing polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
    • C08J3/246—Intercrosslinking of at least two polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L19/00—Compositions of rubbers not provided for in groups C08L7/00 - C08L17/00
    • C08L19/003—Precrosslinked rubber; Scrap rubber; Used vulcanised rubber
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L19/00—Compositions of rubbers not provided for in groups C08L7/00 - C08L17/00
    • C08L19/006—Rubber characterised by functional groups, e.g. telechelic diene polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2021/00—Use of unspecified rubbers as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/24—Condition, form or state of moulded material or of the material to be shaped crosslinked or vulcanised
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2321/00—Characterised by the use of unspecified rubbers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • C08L33/04—Homopolymers or copolymers of esters
    • C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
    • C08L33/08—Homopolymers or copolymers of acrylic acid esters
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
    • C08L75/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Sustainable Development (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Reinforced Plastic Materials (AREA)
  • Tyre Moulding (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

The present invention provides a method suitable for using the rubber material in worn-out tyres by pulverising it and mixing the particles obtained with plastic so that a mechanical bond is obtained between molecule chains of plastic and rubber as well as cross-linking between the various chains.

Description

SPECIFICATION Body manufactured by compression under pressure at raised temperature The present invention relates to the manufacture of a body obtained by means of compression under pressure at raised temperature. It is quite usual to manufacture various bodies in presses, the starting material for saidbodies comprising a mixture of different materials. Worn-out cartyres have long been an unusually difficult waste product to destroy. The most frequent use to which such tyres have been put is as bollards in harbours and as elements in blasting mats. Some attempts have also been made to grind the tyres to pieces. However, it has been difficult to find a suitable use for the ground tyres.
The object of the present invention is to make use of the rubber in worn-out car tyres in the manufacture of new products. According to the invention the rubber remaining on a tyre is ground into particles and the particles of rubber are then mixed with particles of plastic. The mixture obtained is subjected to compression under raised temperature, a compressed product being obtained which may be used for various purposes depending on the ratio of ingredients in the mixture and on the plastic selected.
According to a further development of the present invention, the rubber particles are loosened in one way or another so that molecule chains of rubber are completely or partially exposed. Cross-links can be obtained in various ways, such as by the addition of substances having the ability to effect cross-links. Examples of such substances include, for instance, sulphur. The cross-links can also be effected by ionized irradiation or the addition of peroxides.
The plastic used may be a thermoplastic having high molecular weight. A thermosetting resin may also be used, in which case it may be advantageous to mix the rubber particles with prepolymers of the thermosetting resin and add setting agent just before the pressing process.
Examples of possible plastics are styrene rubber, butadiene rubber, polyurethane, such as a polyurethane elastomer, and acrylates. In some cases the plastic may be added as an emulsion. In a mixture of rubber particles and plastic about 23% should be added of a substance which will cause cross-linking.
The complete or partial exposure of molecule chains can be achieved in various ways. One method is to suspend the rubber particles in a solvent together with plastic and thereafter allow the solvent to evaporate. Another method is to use the gaseous phase of a solvent to expose molecule chains or rubber. A third method is to allow the rubber particles to pass through an electrical field, preferably a discharge field which may have anode and cathode, either the anode or the cathode constituting a conveyor belt. Yet another method is to allow oxygen and ultraviolet radiation to react together on the rubber particles. Still another method of effecting exposure of molecule chains of rubber is to effect oxidation with air or ozone in the vicinity of the rubber particles.
The rubber particles have been mentioned above in general terms, which means that they have arbitrary shape, such as granular or a substantially fibrous form. Rubber particles in fibrous form, rather than granular particles, are preferable since the fibres as such are- better capable of producing a durable body.
Further characteristics of the present invention are revealed in the following claims.
The following Example further illustrates the present invention.
EXAMPLE All the rubber applied on the casing of a car tyre which can no longer be used for transport is scraped off in such a way that narrow fibres are obtained having a maximum length of 5 mm. Each of said fibres contains vulcanising agent. This is because when a car tyre is manufactured it is only subjected to vulcanisation for a period of 10 minutes to ensure that a high-grade tyre is obtained. The finished tyre will therefore always have a certain amount of unconsumed vulcanisation substances. The quantity is generally 1% or less and in practice amounts of 1%, 0.3% and 0.75% have been found.
The rubber fibres obtained are mixed with an evaporntable solvent in order to completely or partially loosen the rubber fibres so that molecule chains of rubber are completely or partially exposed. Aliphatic or aromatic hydrocarbon may be used as solvent. Examples of such hydrocarbons are hexane, heptane, petroleum ether, benzene and toluene. Other solvents possible are ethers, halogenated aliphatic and aromatic solvents, ketones and dimethylformamide. Examples of ethers are diethylene ether, dioxane and tetrahydrofuran.
Examples of halogenated aliphatic and aromatic solvents are trichloroethylene and chlorobenzene.
Acetone may be used as ketone.
The desired plastic is added to the solvent and rubber fibres, together with vulcanisation agent such as sulphur, the sulphur constituting about 2% of the mixture of rubber fibres and plastic. When the solvent has evaporated, exposed molecule chains of rubber and molecule chains of plastic will be threaded into each other so that a mechanical bond is obtained between plastic and rubber. The substance remaining after evaporation is in the form of a granulate. This is placed in a mould to shape the granulate to the desired product. The mould is normally heated to a temperature corresponding to the softening temperature of the plastic used. The granulate will thus spread all over the mould. When this has occurred, the temperature is lowered as quickly as possible to one at which the vulcanisation properties of the rubber fibres are not affected, i.e.
a temperature below about 1 800 C. Should the temperature exceed 1 800 C, the material in the mould must be at such a temperature for only a short period in order not to destroy the vulcanisation properties. When the granulate has spread out well in the mould, the material in the mould is subjected to a pressure somewhere between 20 and 40 kilopond. During this compression at a temperature below the temperature dangerous to the rubber fibres, crosslinking is obtained between both plastic particles and rubber particles. A high-grade body with good strength properties is obtained.

Claims (18)

CLAiMS
1. A body manufactured by compressing under pressure at raised temperature a starting material which comprises a mixture of rubber particles and plastics material, and wherein the molecule chains of the rubber particles are cross-linked.
2. A body according to Claim 1, wherein the molecule chains of the plastics material are also cross-linked.
3. A body according to Claim 1 or 2, wherein the molecule chains of the rubber particles are cross-linked with the molecule chains of the plastics material.
4. A body according to Claim 1, 2 or 3, wherein the rubber particles have completely or partially exposed molecule chains.
5. A body according to any one of the preceding claims, wherein molecule chains of plastics material and molecule chains of rubber are threaded into each other, thus effecting a link between plastics and rubber particles.
6. A body according to any one of the preceding claims, wherein the rubber particles are granular.
7. A body according to any one of Claims 1 to 5, wherein the rubber particles are in the form of fibres.
8. A body according to any one of the preceding claims, wherein the particles contain remnants of vulcanising medium such as sulphur.
9. A body according to any one of the preceding claims, wherein the mixture contains means effecting cross-links between plastics molecules and preferably also between plastics molecules and rubber molecules.
10. A body according to any one of the preceding claims, wherein the plastics material consists of a thermoplastics or a mixture of thermoplastics.
11. A body according to any one of the preceding claims, wherein the plastics material consists of a cured resin or mixtures of cured resins.
1 2. A body according to Claim 1 substantially as hereinbefore described in the Example.
13. Method of manufacturing a body according to any one of the preceding claims, which method comprises exposing, partially or completely, molecule chains in the rubber particles, either by means of a solvent or by external influence.
14. Method according to Claim 13, wherein the solvent used is selected from aliphatic and aromatic hydrocarbons, ethers, halogenated aliphatic and aromatic solvents, ketones and dimethylformamide.
1 5. Method according to Claim 1 3 or 14, wherein the solvent is used in liquid phase or vapour phase.
1 6. Method according to Claim 13, 14, or 15, wherein the complete or partial exposure of molecule chains of rubber is performed in an electrical field.
17. Method according to any one of Claims 13 to 1 6, wherein prior to compression, rubber particles, plastics material and cross-linking agent are mixed.
18. Method according to any one of Claims 13 to 17, wherein the temperature briefly exceeds the temperature for breaking down the vulcanising effect in the rubber particles.
1 9. Method according to Claim 13 substantially as hereinbefore described in the Example.
GB8115432A 1981-05-20 1981-05-20 Body manufactured by compression under pressure at raised temperature Expired GB2098533B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE3120101A DE3120101A1 (en) 1981-05-20 1981-05-20 BY PRESSING UNDER PRESSURE AND A BODY PRODUCED AT INCREASED TEMPERATURE
GB8115432A GB2098533B (en) 1981-05-20 1981-05-20 Body manufactured by compression under pressure at raised temperature
NL8102568A NL8102568A (en) 1981-05-20 1981-05-25 BODY MADE BY PRESSURE COMPRESSION AT INCREASED TEMPERATURE.
FR8110784A FR2506665B1 (en) 1981-05-20 1981-06-01 BODY MANUFACTURED BY HOT PRESSURE COMPRESSION

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8115432A GB2098533B (en) 1981-05-20 1981-05-20 Body manufactured by compression under pressure at raised temperature

Publications (2)

Publication Number Publication Date
GB2098533A true GB2098533A (en) 1982-11-24
GB2098533B GB2098533B (en) 1985-03-20

Family

ID=10521927

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8115432A Expired GB2098533B (en) 1981-05-20 1981-05-20 Body manufactured by compression under pressure at raised temperature

Country Status (4)

Country Link
DE (1) DE3120101A1 (en)
FR (1) FR2506665B1 (en)
GB (1) GB2098533B (en)
NL (1) NL8102568A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0146172A1 (en) * 1983-12-03 1985-06-26 Stamicarbon B.V. Process for the preparation of impact-resistant thermoplastic polymer mixtures and impact-resistant polymer compositions
US5151230A (en) * 1990-10-01 1992-09-29 Dinoflex Manufacturing Ltd. Process for production of products formed of polymer bonded and granulated particles
EP1092520A1 (en) * 1999-10-15 2001-04-18 Franz Holzer Process for recycling of tyres, rubber or elastomeric scrap and thermoplastic scrap of any kind
FR2866591A1 (en) * 2004-02-19 2005-08-26 Reynald Francois Quatrehomme Composite sheet material for wrapping or bags is made from granular materials coated with a bonding agent and vulcanised

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3320250A1 (en) * 1982-10-21 1984-04-26 Werner 6349 Hörbach Henrich METHOD FOR THE PROCESSING OF STRAND-SHAPED GOODS WINDED WITH THE AID OF A FLYER
DE4121081A1 (en) * 1991-06-26 1993-01-14 Obersteiner Baustoff Gmbh Heat-insulating or sound-absorbing elements for covering buildings - are prepd. from chopped plastics waste, chopped old rubber tyres, waste polystyrene foam granules, and binder

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3489710A (en) * 1964-03-04 1970-01-13 Union Carbide Corp Flexible thermoplastic resins as binders for vulcanized rubber
GB1465485A (en) * 1974-04-02 1977-02-23 Webster G Method of producing rubber moulding compounds using scrap materials
NL7711918A (en) * 1976-11-18 1978-05-22 Lensmar Ab Jan BODY CONTAINING BINDER AND VULCANIZED RUBBER.
US4168799A (en) * 1977-09-16 1979-09-25 Entek Corporation Soaker hose
GB2019853B (en) * 1978-03-28 1982-09-15 Speirs G K Method of producing thermoplastics moulding compounds using scrap materials

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0146172A1 (en) * 1983-12-03 1985-06-26 Stamicarbon B.V. Process for the preparation of impact-resistant thermoplastic polymer mixtures and impact-resistant polymer compositions
US5151230A (en) * 1990-10-01 1992-09-29 Dinoflex Manufacturing Ltd. Process for production of products formed of polymer bonded and granulated particles
EP1092520A1 (en) * 1999-10-15 2001-04-18 Franz Holzer Process for recycling of tyres, rubber or elastomeric scrap and thermoplastic scrap of any kind
FR2866591A1 (en) * 2004-02-19 2005-08-26 Reynald Francois Quatrehomme Composite sheet material for wrapping or bags is made from granular materials coated with a bonding agent and vulcanised

Also Published As

Publication number Publication date
FR2506665A1 (en) 1982-12-03
DE3120101A1 (en) 1982-12-09
NL8102568A (en) 1982-12-16
GB2098533B (en) 1985-03-20
FR2506665B1 (en) 1986-04-25

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PCNP Patent ceased through non-payment of renewal fee