GB738487A - Improvements in or relating to the manufacture of moulded articles - Google Patents

Improvements in or relating to the manufacture of moulded articles

Info

Publication number
GB738487A
GB738487A GB72152A GB72152A GB738487A GB 738487 A GB738487 A GB 738487A GB 72152 A GB72152 A GB 72152A GB 72152 A GB72152 A GB 72152A GB 738487 A GB738487 A GB 738487A
Authority
GB
United Kingdom
Prior art keywords
rigid
moulded
monomers
methyl
mixture
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
GB72152A
Inventor
Peter Maurice Jacques
Koch De Gooreynd
John Johnson
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.)
Peterlite Products Ltd
Original Assignee
Peterlite Products 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
Priority to LU32916D priority Critical patent/LU32916A1/xx
Priority to NL89255D priority patent/NL89255C/xx
Priority to NLAANVRAGE7807431,A priority patent/NL188031B/en
Application filed by Peterlite Products Ltd filed Critical Peterlite Products Ltd
Priority to GB72152A priority patent/GB738487A/en
Publication of GB738487A publication Critical patent/GB738487A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F20/00—Homopolymers and 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 a salt, anhydride, ester, amide, imide or nitrile thereof
    • C08F20/02—Monocarboxylic acids having less than ten carbon atoms, Derivatives thereof
    • C08F20/10—Esters
    • C08F20/12—Esters of monohydric alcohols or phenols
    • 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
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/003—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor characterised by the choice of material
    • B29C39/006—Monomers or prepolymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00009—Production of simple or compound lenses
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2/00—Processes of polymerisation
    • C08F2/02—Polymerisation in bulk
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
    • G02B1/041—Lenses

Abstract

Moulded or shaped articles are made by partially polymerizing a mixture of monomers, of which when fully polymerized alone one is thermoplastic and the other is thermoset, to a sheet or block which is sufficiently rigid to be stored and handled and then shaping or moulding under heat and pressure whereby polymerization is completed to form a rigid infusible product. The two classes of monomers are exemplified by methyl, ethyl, propyl and isopropyl methacrylates and styrene; and allyl methacrylate. More than one thermoplastic resin-forming monomer may be used. In either of the two stages of the process heating may be wholly or partially replaced by high energy radiation, e.g. from a cobalt 60 source. In the example a syrup made by heating a mixture of equal parts of methyl and allyl methacrylates with benzoyl peroxide is poured into a casting mould of spaced parallel glass plates and heated at 35 DEG to 40 DEG C. for 40 to 50 hours. The rigid sheet formed is preheated at 95 DEG to 105 DEG C. and moulded or shaped under pressure at 150 DEG C. The process may be applied to the production of lenses and transparent domes for aircraft. Specifications 556,743, 585,576, [both in Group V], 585,580 and 610,962 are referred to.
GB72152A 1952-01-10 1952-01-10 Improvements in or relating to the manufacture of moulded articles Expired GB738487A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
LU32916D LU32916A1 (en) 1952-01-10
NL89255D NL89255C (en) 1952-01-10
NLAANVRAGE7807431,A NL188031B (en) 1952-01-10 WRAP CARRIER.
GB72152A GB738487A (en) 1952-01-10 1952-01-10 Improvements in or relating to the manufacture of moulded articles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB72152A GB738487A (en) 1952-01-10 1952-01-10 Improvements in or relating to the manufacture of moulded articles

Publications (1)

Publication Number Publication Date
GB738487A true GB738487A (en) 1955-10-12

Family

ID=9709362

Family Applications (1)

Application Number Title Priority Date Filing Date
GB72152A Expired GB738487A (en) 1952-01-10 1952-01-10 Improvements in or relating to the manufacture of moulded articles

Country Status (3)

Country Link
GB (1) GB738487A (en)
LU (1) LU32916A1 (en)
NL (2) NL89255C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4826889A (en) * 1978-07-18 1989-05-02 Polymer Technology, Corp. Dimensionally stable oxygen permeable hard contact lens material and method of manufacture
US4885125A (en) * 1985-08-28 1989-12-05 Sumitomo Chemical Company, Limited Method for in-mold polymerization of unsaturated compound

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4826889A (en) * 1978-07-18 1989-05-02 Polymer Technology, Corp. Dimensionally stable oxygen permeable hard contact lens material and method of manufacture
US4885125A (en) * 1985-08-28 1989-12-05 Sumitomo Chemical Company, Limited Method for in-mold polymerization of unsaturated compound

Also Published As

Publication number Publication date
NL89255C (en)
NL188031B (en)
LU32916A1 (en)

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