FR2071992A1 - Expanded polypropylene - Google Patents

Expanded polypropylene

Info

Publication number
FR2071992A1
FR2071992A1 FR7046208A FR7046208A FR2071992A1 FR 2071992 A1 FR2071992 A1 FR 2071992A1 FR 7046208 A FR7046208 A FR 7046208A FR 7046208 A FR7046208 A FR 7046208A FR 2071992 A1 FR2071992 A1 FR 2071992A1
Authority
FR
France
Prior art keywords
polypropylene
eta
heptane
degrees
expanded polypropylene
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
FR7046208A
Other languages
French (fr)
Other versions
FR2071992B1 (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.)
Mitsubishi Petrochemical Co Ltd
Original Assignee
Mitsubishi Petrochemical 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 Mitsubishi Petrochemical Co Ltd filed Critical Mitsubishi Petrochemical Co Ltd
Publication of FR2071992A1 publication Critical patent/FR2071992A1/en
Application granted granted Critical
Publication of FR2071992B1 publication Critical patent/FR2071992B1/fr
Granted legal-status Critical Current

Links

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
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
    • C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/36—Feeding the material to be shaped
    • B29C44/46—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length
    • B29C44/50—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length using pressure difference, e.g. by extrusion or by spraying
    • 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
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • 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
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/10—Homopolymers or copolymers of propene
    • C08J2323/12—Polypropene

Landscapes

  • Chemical & Material Sciences (AREA)
  • General 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)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

Greatly expanded polypropylene is prepd. by pressing through an extruder a mixture of a polypropylene which contains 15-50% of n-heptane-soluble polypropylene and has an intrinsic viscosity (eta) of not 3.0, measured in tetralin at 135 degrees C, the n-heptane-soluble fraction having (eta) of 0.35-3.0, with 1 or more chemical blowing agents, under conditions such that the back-pressure is not 200 kg/cm2 and the temp. of the synthetic substance on leaving the extruder orifice is =200 degrees C. Polypropylene products with a degree of expansion of up to 5-30 can be product.
FR7046208A 1969-12-22 1970-12-22 Expanded polypropylene Granted FR2071992A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10256269 1969-12-22

Publications (2)

Publication Number Publication Date
FR2071992A1 true FR2071992A1 (en) 1971-09-24
FR2071992B1 FR2071992B1 (en) 1974-03-01

Family

ID=14330655

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7046208A Granted FR2071992A1 (en) 1969-12-22 1970-12-22 Expanded polypropylene

Country Status (3)

Country Link
DE (1) DE2063185A1 (en)
FR (1) FR2071992A1 (en)
NL (1) NL7018652A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989000918A2 (en) * 1987-07-29 1989-02-09 Massachusetts Institute Of Technology A method of producing microcellular foams and microcellular foams of semi-crystalline polymeric materials
US5160674A (en) * 1987-07-29 1992-11-03 Massachusetts Institute Of Technology Microcellular foams of semi-crystaline polymeric materials

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3407151A (en) * 1964-06-18 1968-10-22 Shell Oil Co Production of expandable and cellular resin products
NL6900748A (en) * 1968-01-27 1969-07-29

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3407151A (en) * 1964-06-18 1968-10-22 Shell Oil Co Production of expandable and cellular resin products
NL6900748A (en) * 1968-01-27 1969-07-29

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989000918A2 (en) * 1987-07-29 1989-02-09 Massachusetts Institute Of Technology A method of producing microcellular foams and microcellular foams of semi-crystalline polymeric materials
WO1989000918A3 (en) * 1987-07-29 1989-03-09 Massachusetts Inst Technology A method of producing microcellular foams and microcellular foams of semi-crystalline polymeric materials
US5160674A (en) * 1987-07-29 1992-11-03 Massachusetts Institute Of Technology Microcellular foams of semi-crystaline polymeric materials

Also Published As

Publication number Publication date
DE2063185A1 (en) 1971-07-15
FR2071992B1 (en) 1974-03-01
NL7018652A (en) 1971-06-24

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Legal Events

Date Code Title Description
ST Notification of lapse