GB682415A - Preparation of polymerized methyl methacrylate sheets - Google Patents

Preparation of polymerized methyl methacrylate sheets

Info

Publication number
GB682415A
GB682415A GB9847/50A GB984750A GB682415A GB 682415 A GB682415 A GB 682415A GB 9847/50 A GB9847/50 A GB 9847/50A GB 984750 A GB984750 A GB 984750A GB 682415 A GB682415 A GB 682415A
Authority
GB
United Kingdom
Prior art keywords
sodium
polymer
alpha
potassium
polymerization
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
GB9847/50A
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Priority to GB9847/50A priority Critical patent/GB682415A/en
Publication of GB682415A publication Critical patent/GB682415A/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
    • 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
    • B29D7/00—Producing flat articles, e.g. films or sheets
    • B29D7/01—Films or sheets

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Graft Or Block Polymers (AREA)
  • Polymerisation Methods In General (AREA)

Abstract

Sheets of methyl methacrylate polymer or copolymers with styrene, vinyl chloride, acrylates, methacrylates or ethacrylates, are made, optionally continuously, by distributing on the surface of a saturated aqueous salt solution having a specific gravity at least as great as the polymer, a liquid consisting of the monomer or monomers, a polymer capable of further polymerization or a mixture of monomer and polymer, and water in an amount at least sufficient to saturate the liquid 70 per cent and effecting or completing the polymerization at a temperature between 0 DEG and 80 DEG C. in the presence of a polymerization catalyst and/or actinic light. Catalysts mentioned are benzoyl, lauroyl, and acetyl benzoyl peroxides, t.-butyl perbenzoate, alpha, alpha1 - azodiisobutyronitrile, alpha, alpha1 - azobis - (alpha, gamma - - dimethylvaleronitrile) and benzoin. Specified salts are sodium, potassium, lithium, magnesium, calcium and barium chlorides, sodium and potassium bromides, sodium iodide, sodium, potassium, magnesium, zinc, ammonium sulphates. The polymerizable liquid may include dyestuffs, pigments, plasticizers, lubricants and pearlescent materials.
GB9847/50A 1950-04-21 1950-04-21 Preparation of polymerized methyl methacrylate sheets Expired GB682415A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9847/50A GB682415A (en) 1950-04-21 1950-04-21 Preparation of polymerized methyl methacrylate sheets

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9847/50A GB682415A (en) 1950-04-21 1950-04-21 Preparation of polymerized methyl methacrylate sheets

Publications (1)

Publication Number Publication Date
GB682415A true GB682415A (en) 1952-11-12

Family

ID=22081312

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9847/50A Expired GB682415A (en) 1950-04-21 1950-04-21 Preparation of polymerized methyl methacrylate sheets

Country Status (1)

Country Link
GB (1) GB682415A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2303653A1 (en) * 1975-03-13 1976-10-08 Eastman Kodak Co PROCESS FOR MANUFACTURING PARTS IN PLASTIC MATERIAL BY MOLDING WITH IRRADIATION

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2303653A1 (en) * 1975-03-13 1976-10-08 Eastman Kodak Co PROCESS FOR MANUFACTURING PARTS IN PLASTIC MATERIAL BY MOLDING WITH IRRADIATION

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