GB960047A - Process for reducing the molecular weight of polyoxymethylene - Google Patents

Process for reducing the molecular weight of polyoxymethylene

Info

Publication number
GB960047A
GB960047A GB3211762A GB3211762A GB960047A GB 960047 A GB960047 A GB 960047A GB 3211762 A GB3211762 A GB 3211762A GB 3211762 A GB3211762 A GB 3211762A GB 960047 A GB960047 A GB 960047A
Authority
GB
United Kingdom
Prior art keywords
molecular weight
irradiation
polyoxymethylene
reducing
megarads
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
GB3211762A
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.)
WR Grace and Co
Original Assignee
WR Grace 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 WR Grace and Co filed Critical WR Grace and Co
Publication of GB960047A publication Critical patent/GB960047A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2/00—Addition polymers of aldehydes or cyclic oligomers thereof or of ketones; Addition copolymers thereof with less than 50 molar percent of other substances
    • C08G2/28—Post-polymerisation treatments

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Polyoxymethylene Polymers And Polymers With Carbon-To-Carbon Bonds (AREA)

Abstract

A polymer or copolymer containing oxymethylene groups is irradiated with high energy irradiation to reduce its average molecular weight. Polymers of trioxane and its copolymer with epichlorohdyrin are specified. The radiation dose may be from 0.01 to 36 megarads or preferably 0.1 to 36 megarads; the radiation may comprise electrons of energy from 0.000015 to 5.0 mev, and the irradiation may be carried out in vacuo or in an inert atmosphere. The polymer may be held, after irradiation, at a temperature above its melting point for 10 to 60 seconds, and may be heated to 170 DEG to 200 DEG C for this time.
GB3211762A 1961-11-15 1962-08-21 Process for reducing the molecular weight of polyoxymethylene Expired GB960047A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15264561A 1961-11-15 1961-11-15

Publications (1)

Publication Number Publication Date
GB960047A true GB960047A (en) 1964-06-10

Family

ID=22543783

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3211762A Expired GB960047A (en) 1961-11-15 1962-08-21 Process for reducing the molecular weight of polyoxymethylene

Country Status (1)

Country Link
GB (1) GB960047A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2189493A (en) * 1986-04-11 1987-10-28 James C W Chien Self-developing resist comprising polymer of aliphatic aldehyde or cyclic ether

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2189493A (en) * 1986-04-11 1987-10-28 James C W Chien Self-developing resist comprising polymer of aliphatic aldehyde or cyclic ether
GB2189493B (en) * 1986-04-11 1990-12-19 James C W Chien Self-developing resist

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