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GB969961A - Method of making articles from foamed elastomeric material - Google Patents

Method of making articles from foamed elastomeric material

Info

Publication number
GB969961A
GB969961A GB3955960A GB3955960A GB969961A GB 969961 A GB969961 A GB 969961A GB 3955960 A GB3955960 A GB 3955960A GB 3955960 A GB3955960 A GB 3955960A GB 969961 A GB969961 A GB 969961A
Authority
GB
United Kingdom
Prior art keywords
composition
synthetic resin
bubbles
polyester
foaming
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.)
Expired
Application number
GB3955960A
Inventor
Vernon Kenneth Charvat
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.)
Osborn Manufacturing Corp
Original Assignee
Osborn Manufacturing Corp
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 Osborn Manufacturing Corp filed Critical Osborn Manufacturing Corp
Priority to GB3955960A priority Critical patent/GB969961A/en
Publication of GB969961A publication Critical patent/GB969961A/en
Expired 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
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C41/04—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould
    • B29C41/042—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould by rotating a mould around its axis of symmetry
    • B29C41/045—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould by rotating a mould around its axis of symmetry the axis being placed vertically, e.g. spin casting
    • 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
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/04—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities
    • B29C44/0423—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities by density separation
    • B29C44/043—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities by density separation using a rotating mould
    • 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
    • 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
    • B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, 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
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • B29K2105/043—Skinned 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
    • C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2375/04—Polyurethanes

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)
  • Mechanical Engineering (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)

Abstract

A method of making a moulded article from a hardenable foamable liquid synthetic resin composition comprises placing a body of the composition in a rotary mould, rotating the mould and the composition during foaming and hardening, and stopping the rotation when the body is of substantially increased viscosity but before hardening is complete to allow the gas bubbles to increase in size and the surrounding web structure to thicken in the radially outer portion of the body. There may also be present in the resin composition a granular abrasive, which initially, on being subjected to the centrifugal force, collects in the peripheral portion of the body (e.g. a polishing or grinding wheel) and then upon completion of the foaming, the grains are carried by the thickened web, the space between them being occupied by spherical cells resulting from the enlarged gas bubbles. As a result of the centrifugal moulding the surface portion of the article develops on the outer periphery a skin substantially free of bubbles and of relatively higher density. One specified synthetic resin is polyurethanes (from polyester and polyisocyanate). Preferably the polyester contains hydroxy to carboxy groups in a ratio from 4 to 1 to 1 1/2 to 1. Ethyl cellulose, polymethylolphenols and zinc stearate may be added to the mixture. A suitable epoxy resin mixture contains also polyoxyethylene sorbitan monolaurate and a blowing agent (p,p1-oxybis-benzene-sulphonyl hydrazide or N,N1-dimethyl-N,N1-dinitrosoterephthalamide). Resins or elastomers wherein air or other gas are entrapped during mixing can also be used.
GB3955960A 1960-11-17 1960-11-17 Method of making articles from foamed elastomeric material Expired GB969961A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3955960A GB969961A (en) 1960-11-17 1960-11-17 Method of making articles from foamed elastomeric material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3955960A GB969961A (en) 1960-11-17 1960-11-17 Method of making articles from foamed elastomeric material

Publications (1)

Publication Number Publication Date
GB969961A true GB969961A (en) 1964-09-16

Family

ID=10410201

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3955960A Expired GB969961A (en) 1960-11-17 1960-11-17 Method of making articles from foamed elastomeric material

Country Status (1)

Country Link
GB (1) GB969961A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2319673A1 (en) * 2009-11-06 2011-05-11 Chistoph Thielen Device for foaming gear knobs

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2319673A1 (en) * 2009-11-06 2011-05-11 Chistoph Thielen Device for foaming gear knobs

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