(19)
(11) EP 0 133 902 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
02.05.1985 Bulletin 1985/18

(43) Date of publication A2:
13.03.1985 Bulletin 1985/11

(21) Application number: 84107521

(22) Date of filing: 28.06.1984
(84) Designated Contracting States:
AT BE CH DE FR GB IT LI LU NL SE

(30) Priority: 01.07.1983 IT 2189383

(71) Applicant: PRODECO S.p.A.
 ()

(72) Inventors:
  • Spina, Nicola
     ()
  • Isolati, Antonio
     ()

   


(54) Paper sizing process


(57) In the paper sizing in which synthetic cellulose-reactive sizing agents and calcium carbonate as the filler are used, the aluminum polyhydroxychloride of formula:

wherein 0.96≤ x ≤6 and n = 2 x has an excellent retention effect.





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