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DE4235747A1 - Syntactic in-situ foam prodn - Google Patents

Syntactic in-situ foam prodn

Info

Publication number
DE4235747A1
DE4235747A1 DE19924235747 DE4235747A DE4235747A1 DE 4235747 A1 DE4235747 A1 DE 4235747A1 DE 19924235747 DE19924235747 DE 19924235747 DE 4235747 A DE4235747 A DE 4235747A DE 4235747 A1 DE4235747 A1 DE 4235747A1
Authority
DE
Germany
Prior art keywords
production
syntactic
foam
foam according
particles
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.)
Ceased
Application number
DE19924235747
Other languages
German (de)
Inventor
Hans-Joachim Burger
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19924235747 priority Critical patent/DE4235747A1/en
Priority claimed from DE19924235746 external-priority patent/DE4235746A1/en
Publication of DE4235747A1 publication Critical patent/DE4235747A1/en
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/58—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising fillers only, e.g. particles, powder, beads, flakes, spheres
    • B29C70/66—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising fillers only, e.g. particles, powder, beads, flakes, spheres the filler comprising hollow constituents, e.g. syntactic foam
    • 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
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/22—After-treatment of expandable particles; Forming foamed products
    • C08J9/228—Forming foamed products
    • C08J9/236—Forming foamed products using binding agents

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Composite Materials (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

A process for the prodn. of syntactic in-situ foam (I) comprises wetting particles of foam (II) with an adhesive matrix (III) and water.Pref. (II) consists of spherical particles of pre-expanded polystyrene, polyolefin or other foamed material, opt. shredded scrap foam parts. The foam particles are pre-dried, ensiled and wetted with the hydrophilic matrix resin, pref. in an air drier-silo fitted with a stirrer, after which the wetted material is pref. dried and stored a dew pt. of about -70 deg.C. The prod. is removed from the silo by suction and transported to the point of use by suction or compressed air, pref. while spraying with water. The water required for reaction on site is supplied as vapour or mist.

Description

Nach der Erfindungsmeldung des Herrn Burger vom 20.10.92 über "Syntaktischen Ortschaum", der aus vorgeschäumten Polystyrolpartikeln oder geschredderten Polystyrol­ schaumteilen oder anderen Schaumteilen und als elastisch verbindende Matrix aus einem hydrophilen Toluol-Diisocyanat Präpolymer formuliert werden soll, ist es vorteilhaft, folgende erfindungsgemäße Herstellmethode anzuwenden:According to Mr. Burger's invention report of October 20, 1992 on "Syntactic Ortschaum ", which consists of pre-expanded polystyrene particles or shredded polystyrene foam parts or other foam parts and as an elastically connecting matrix from one hydrophilic toluene diisocyanate prepolymer, it is advantageous to to use the following manufacturing method according to the invention:

In einem vorzugsweise mit Trockenlufttrockner auf niedriger Feuchte im Taupunktsbereich von ca. -70°C gehaltenem Silo werden Polystyrolschaumpartikel oder andere Schaumpartikel als Neuware und/oder geschredderte Altteile bei ca. 70°C getrocknet. Nach Hinzufügen von ca. 100 GT hydrophilem PU-Matrixharz auf 100 GT Schaumpartikel wird die Masse intensiv vermischt und steht bei einer Lagerzeit von mehreren Tagen zum Verbrauch bereit. Bei Anforderung wird eine benötigte Menge über ein Ausgangsrohr entnommen und mittels Saug- oder Druckluft an den Verbrauchsort befördert und dort durch die einwirkende Kraft der Luft leicht verdichtet. Auf dem Wege zum Verbrauchort wird den matrixbenetzten Schaumteilen Wasser in ungefähr der gleichen Menge der Matrix aufgedüst. Ein Wasser­ überschuß, der nicht vom Matrixharz aufgebraucht wird, verdunstet später aus dem Artikel, oder das Wasser wird so genau dosiert, daß es vom Matrix-Harz restlos aufgebraucht wird.In a preferably with a dry air dryer at low humidity in the dew point area from about -70 ° C kept silo polystyrene foam particles or other foam particles dried as new goods and / or shredded old parts at approx. 70 ° C. After adding approx. 100 pbw of hydrophilic PU matrix resin per 100 pbw of foam particles becomes the mass mixed intensively and is ready for consumption with a storage time of several days. If required, a required amount is withdrawn via an outlet pipe and by means of Suction or compressed air is transported to the place of consumption and there by the acting force slightly compressed in the air. On the way to the place of consumption, the matrix wetted Foam parts of water sprayed in approximately the same amount of the matrix. A water excess that is not used up by the matrix resin later evaporates from the article, or the water is dosed so precisely that it is completely used up by the matrix resin.

Die besten Ergebnisse hinsichtlich Partikelverklebung, Formfüllung und ggf. Elastizität werden erreicht, wenn das Matrix-Harz geringfügig aufschäumt. Praxisversuche ergaben, daß Aufschäumen und Vernetzen innerhalb von ca. 0,5 Std. soweit fortgeschritten sind, daß eine weitere Manipulation stattfinden kann, sei es die Weiterverarbeitung oder die Entnahme aus dimensionsgebenden Formen, z. B. aus vakuumgezogenen Häuten.The best results in terms of particle bonding, mold filling and possibly elasticity are achieved when the matrix resin foams up slightly. Practical tests have shown that Foaming and crosslinking have progressed within about 0.5 hours to the extent that a further manipulation can take place, be it further processing or removal from dimensional shapes, e.g. B. from vacuum-drawn skins.

Claims (11)

1. Herstellung eines syntaktischen Ortschaums, dadurch gekennzeichnet, daß Schaumpartikel mit klebender Matrix und Wasser benetzt werden.1. Production of a syntactic local foam, characterized in that foam particles are wetted with an adhesive matrix and water. 2. Herstellung eines syntaktischen Ortschaums nach Anspruch 1, dadurch gekennzeichnet, daß die Schaumpartikel kugelig vorgeschäumtes Polystyrol, Polyolefin oder ein anderer geschäumter Werkstoff ist.2. Production of a syntactic foam according to claim 1, characterized characterized in that the foam particles are pre-expanded polystyrene, Is polyolefin or another foamed material. 3. Herstellung eines syntaktischen Ortschaums nach Anspruch 1, dadurch gekennzeichnet, daß die Schaumpartikel geschredderte Altteile sind.3. Production of a syntactic foam according to claim 1, characterized characterized in that the foam particles are shredded old parts. 4. Herstellung eines syntaktischen Ortschaums nach Anspruch 1, dadurch gekennzeichnet, daß die Schaumpartikel vorgetrocknet und siliert werden.4. Production of a syntactic local foam according to claim 1, characterized characterized in that the foam particles are pre-dried and ensiled. 5. Herstellung eines syntaktischen Ortschaums nach Anspruch 1, dadurch gekennzeichnet, daß die Schaumpartikel mit dem hydrophilen Matrixharz benetzt werden.5. Production of a syntactic foam according to claim 1, characterized characterized in that the foam particles with the hydrophilic matrix resin be wetted. 6. Herstellung eines syntaktischen Ortschaums nach Anspruch 4 und 5, dadurch gekennzeichnet, daß Trocknung und Benetzung in einem mit Rührwerk ausgestattetem Trockenlufttrockner-Silo geschieht.6. Production of a syntactic foam according to claim 4 and 5, characterized in that drying and wetting in one with Agitator equipped dry air dryer silo happens. 7. Herstellung eines syntaktischen Ortschaums nach Anspruch 6, dadurch gekennzeichnet, daß die Trocknung und Lagerung der mit Matrix benetzten Masse im Bereich eines Taupunktes von ca. -70°C geschieht.7. Production of a syntactic foam according to claim 6, characterized characterized in that the drying and storage of the wetted with matrix Mass occurs in the range of a dew point of approx. -70 ° C. 8. Herstellung eines syntaktischen Ortschaums nach Anspruch 1, dadurch gekennzeichnet, daß Siloentnahmen durch Saugluft erfolgt.8. Production of a syntactic foam according to claim 1, characterized characterized in that silo withdrawals are carried out by suction air. 9. Herstellung eines syntaktischen Ortschaums nach Anspruch 1, dadurch gekennzeichnet, daß der Transport der geforderten abgerufenen Masse mittels Saug- oder Druckluft zum Verbrauchsort gefördert wird.9. Production of a syntactic local foam according to claim 1, characterized characterized in that the transport of the requested requested mass by means of Suction or compressed air is conveyed to the place of consumption. 10. Herstellung eines syntaktischen Ortschaums nach Anspruch 9, dadurch gekennzeichnet, daß der Masse auf dem Transportweg Wasser aufgedüst wird.10. Production of a syntactic foam according to claim 9, characterized characterized in that the mass is sprayed on the transport route water. 11. Herstellung eines syntaktischen Ortschaums nach Anspruch 1, dadurch gekennzeichnet, daß das zur Reaktion benötigte Wasser innerhalb des Verbrauchsortes als Dampf oder Nebel zugeführt wird.11. Production of a syntactic foam according to claim 1, characterized characterized in that the water required for the reaction within the Place of consumption is supplied as steam or mist.
DE19924235747 1992-10-23 1992-10-23 Syntactic in-situ foam prodn Ceased DE4235747A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19924235747 DE4235747A1 (en) 1992-10-23 1992-10-23 Syntactic in-situ foam prodn

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19924235747 DE4235747A1 (en) 1992-10-23 1992-10-23 Syntactic in-situ foam prodn
DE19924235746 DE4235746A1 (en) 1992-10-23 1992-10-23 Syntactic in-situ foam, for packaging, cavity filling, etc. - consists of polystyrene or other foam particles bonded in a matrix of isocyanate prepolymer and activated with water to give compact foam

Publications (1)

Publication Number Publication Date
DE4235747A1 true DE4235747A1 (en) 1994-06-30

Family

ID=25919736

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19924235747 Ceased DE4235747A1 (en) 1992-10-23 1992-10-23 Syntactic in-situ foam prodn

Country Status (1)

Country Link
DE (1) DE4235747A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0934974A1 (en) * 1996-04-05 1999-08-11 Kaneka Corporation Hydrous polyolefin resin composition, preexpanded particles produced therefrom, process for producing the same, and expanded moldings
US6607682B1 (en) 1998-07-30 2003-08-19 Kaneka Corporation Pre-expanded polypropylene resin beads and process for producing molded object therefrom by in-mold foaming
US6770682B2 (en) 1999-12-28 2004-08-03 Kaneka Corporation Expandable styrene resin beads and foams produced therefrom

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0934974A1 (en) * 1996-04-05 1999-08-11 Kaneka Corporation Hydrous polyolefin resin composition, preexpanded particles produced therefrom, process for producing the same, and expanded moldings
EP0934974A4 (en) * 1996-04-05 2000-09-13 Kaneka Corp Hydrous polyolefin resin composition, preexpanded particles produced therefrom, process for producing the same, and expanded moldings
US6596782B1 (en) 1996-04-05 2003-07-22 Kaneka Corporation Hydrous polyolefin resin composition, preexpanded particles produced therefrom, process for producing the same, and expanded molding
US6607682B1 (en) 1998-07-30 2003-08-19 Kaneka Corporation Pre-expanded polypropylene resin beads and process for producing molded object therefrom by in-mold foaming
US6770682B2 (en) 1999-12-28 2004-08-03 Kaneka Corporation Expandable styrene resin beads and foams produced therefrom

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