Composition for treating carbon fibre precursors

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(11)

EP 0 444 828 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	06.11.1991 Bulletin 1991/45

(43)	Date of publication A2:
	04.09.1991 Bulletin 1991/36

(21)	Application number: 91301415.5

(22)	Date of filing: 21.02.1991

(51)	International Patent Classification (IPC)⁵: D01F 9/22, D06M 15/643, D06M 15/647

(84)	Designated Contracting States:
	DE FR GB NL

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Priority:

01.03.1990 GB 9004627

(71)	Applicant: Dow Corning Limited
	South Glamorgan CF6 7YL Wales (GB)

(72)	Inventors:
	Cray, Stephen Edward South Glamorgan, Wales (GB) Quideau, Sylvie Anne Wisconsin 53705 (US)

(74)	Representative: Vandamme, Luc Johan Roger et al
	Dow Corning Limited Cardiff Road Barry South Glamorgan CF6 7YL Wales Barry South Glamorgan CF6 7YL Wales (GB)

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References cited: :

(54)	Composition for treating carbon fibre precursors

(57) A composition for treating acrylonitrile-based precursor fibres for the production of carbon fibres comprises a siloxane polymer characterised in that the siloxane polymer consists of 1 to 50 siloxane units of the general formula (a)

0 to 50 siloxane units of the general formula (b)

and 10 to 900 siloxane units of the general formula (c)

wherein R is hydrogen or a C₁₋₁₈ hydrocarbon group, A represents either certain amido groups containing organic groups or the reaction product of a silicon-bonded group -R'NH-R⁺ with one or more monoepoxides or lactones, B denotes a polyoxyalkylene group. Fibres produced by a method which includes the treatment with such compositions are superior in cosmetic appearance and strength.

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