GB650149A - Improvements in and relating to the production of cellulose acetate for use in moulding compositions - Google Patents

Improvements in and relating to the production of cellulose acetate for use in moulding compositions

Info

Publication number
GB650149A
GB650149A GB2301448A GB2301448A GB650149A GB 650149 A GB650149 A GB 650149A GB 2301448 A GB2301448 A GB 2301448A GB 2301448 A GB2301448 A GB 2301448A GB 650149 A GB650149 A GB 650149A
Authority
GB
United Kingdom
Prior art keywords
parts
cellulose acetate
sodium dihydrogen
total solids
solution
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
GB2301448A
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.)
GEOFFREY BURDETT TURNER
JOHN CHRISTOPHER PERCY BOYES W
Akzo Nobel UK PLC
Original Assignee
GEOFFREY BURDETT TURNER
JOHN CHRISTOPHER PERCY BOYES W
Courtaulds PLC
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 GEOFFREY BURDETT TURNER, JOHN CHRISTOPHER PERCY BOYES W, Courtaulds PLC filed Critical GEOFFREY BURDETT TURNER
Priority to GB2301448A priority Critical patent/GB650149A/en
Publication of GB650149A publication Critical patent/GB650149A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
    • C08L1/08—Cellulose derivatives
    • C08L1/10—Esters of organic acids, i.e. acylates
    • C08L1/12—Cellulose acetate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B3/00—Preparation of cellulose esters of organic acids
    • C08B3/22—Post-esterification treatments, including purification

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • Materials Engineering (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Abstract

Precipitated secondary cellulose acetate is treated immediately prior to final drying with an aqueous solution containing an acid Group Ia or Group IIa metal salt of a polybasic acid having a pH p within the range 60-7.5, and preferably within the range 6.4-7.0. The Groups Ia and IIa referred to are those of the Periodic Classification. The treated cellulose acetate possesses improved thermal and colour stability and is particularly useful for moulding compositions. Suitable salts are sodium dihydrogen phosphate, disodium hydrogen phosphate, the magnesium hydrogen phosphates and sodium dihydrogen citrate. The water used for making up the solution should contain less than 20 parts per million total solids. In an example 100 parts by weight of cellulose are converted to secondary cellulose acetate by reaction with acetic anhydride and sulphuric acid in conventional manner. To the stabilized ester containing about 300 parts of hard water is added a solution of 1.8 parts of sodium dihydrogen phosphate and 0.25 parts of sodium hydroxide in 1500 parts of water containing less than 20 parts per million total solids. After stirring for 1 hour, the liquor is drained off, the ester centrifuged to a mixture content of about 200 per cent and finally dried to a moisture content of about 4 per cent.
GB2301448A 1948-09-01 1948-09-01 Improvements in and relating to the production of cellulose acetate for use in moulding compositions Expired GB650149A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2301448A GB650149A (en) 1948-09-01 1948-09-01 Improvements in and relating to the production of cellulose acetate for use in moulding compositions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2301448A GB650149A (en) 1948-09-01 1948-09-01 Improvements in and relating to the production of cellulose acetate for use in moulding compositions

Publications (1)

Publication Number Publication Date
GB650149A true GB650149A (en) 1951-02-14

Family

ID=10188692

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2301448A Expired GB650149A (en) 1948-09-01 1948-09-01 Improvements in and relating to the production of cellulose acetate for use in moulding compositions

Country Status (1)

Country Link
GB (1) GB650149A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0311103A2 (en) * 1987-10-08 1989-04-12 Mitsubishi Rayon Co., Ltd. Process for production of cellulose acetate molding materials

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0311103A2 (en) * 1987-10-08 1989-04-12 Mitsubishi Rayon Co., Ltd. Process for production of cellulose acetate molding materials
EP0311103A3 (en) * 1987-10-08 1990-05-02 Mitsubishi Rayon Co., Ltd. Process for production of cellulose acetate molding materials

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