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Machine translation
1. (WO1981001711) POLYMERISATION TO FORM GRANULES OF CROSSLINKED UNSATURATED POLYESTER
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1981/001711    International Application No.:    PCT/AU1980/000097
Publication Date: 25.06.1981 International Filing Date: 24.11.1980
IPC:
C08F 299/04 (2006.01)
Applicants:
Inventors:
Priority Data:
1643/79 07.12.1979 AU
Title (EN) POLYMERISATION TO FORM GRANULES OF CROSSLINKED UNSATURATED POLYESTER
(FR) POLYMERISATION POUR LA FORMATION DE GRANULES DE POLYESTER NON SATURES RETICULES
Abstract: front page image
(EN)Process of preparing aqueous slurries of vesiculated granules of crosslinked polyester resin wherein the granules have a maximum shrinkage on drying of 5% of the granule diameter. Previously known processes for the preparation of granules of this type has utilised polyamines; this as led to odour and colour problems. These problems may be eliminated or substantially reduced by the use of bases which are metal oxides, hydroxides or salts wherein the metal cation is selected from Ca, Mg, Ba, Ti, Zn, Pb, Sr and Co and, when a metal salt is used the pKa value of the conjugate acod of the anion is greater than 2. The process of this invention consists of polymerising a carboxylated unsaturated polyester with acid values between 5-50 mg KOH/g and (Alpha), (Beta)-ethylenically unsaturated monomer by a double emulsion process and in the presence of a base referred to above. The resulting granules are useful as matting and opacifying agents in, for example, paint compositions.
(FR)Procede de preparation de boues aqueuses de granules vesiculaires d"une resine de polyester reticulee permettant aux granules d"avoir une contraction ou retrait maximum lors du sechage de 5% du diametre du granule. Des procedes anterieurs connus de preparation de granules de ce type avaient recours a des polyamines, ce qui a provoque des problemes d"odeurs et de coloration. Ces problemes peuvent etre elimines ou sensiblement reduits en utilisant des bases qui sont des oxydes metalliques, des hydroxydes metalliques ou des sels metalliques ou le cation metallique est choisi parmi Ca, Mg, Ba, Ti, Zn, Pb, Sr et Co et, lorsqu"un sel metallique est utilise, la valeur pKa de l"acide conjuge de l"anion est superieure a 2. Le procede consiste a polymeriser un polyester carboxyle non sature avec des valeurs acides entre 5 et 50 mg KOH/g et un monomere (Alpha), (Beta)B-ethyleniquement non sature par un procede a double emulsion et en presence d"une des bases mentionnees ci-dessus. Les granules resultants sont utiles comme agents de mattage et d"opacite, par exemple, dans les compositions de peinture.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)