Thermostable flameproofing agent for copolyesters, process...

Details Thermostable flameproofing agent for copolyesters, process... Thermostable flameproofing agent for copolyesters, process...

Category

C - Chemistry, Metallurgy

Subcategory

08

Subsubcategory

K

CPC

402/188, 402/190

IPC codes

C08K 5/42 (2006.01) C08G 63/688 (2006.01) C09K 21/08 (2006.01) C09K 21/14 (2006.01) D01F 6/84 (2006.01)

Type

Patent

Patent number

CA 1095071

Description

ABSTRACT OF THE DISCLOSURE: The invention is concerned with a thermostable flame- proofing agent for copolyester compositions, which comprises the reaction product of 1 mole of a dialkyl diester of an alkali dicarboxyaryl-sulphonate having the general formula: Image wherein R' represents an alkyl radical containing from 1 to 3 carbon atoms and M represents an alkali metal atom, with 1 to 2 moles of at least one tetrabrominated diol having the general formula: Image wherein a and b represent, independently one of the other, a whole number from 1 to 3 inclusive; the reaction is effec- ted in the presence of a transesterification catalyst selec- ted from the group consisting of compounds of Zn, Co, Ca, Sn, Ti and Mn. The flame-proofing agent of the invention imparts to polyester materials, besides improved self-extinguishing properties, a considerable thermostability with a substantial improvement of the resistance to the propagation of flame.

Application Number

263651

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