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US005110414A
[ii] Patent Number: 5,110,414 [45] Date of Patent: May 5, 1992
[52] U.S. CI 162/163; 162/11;
162/12; 162/164.6; 162/168.2
[58] Field of Search 162/11, 12, 16, 163,
162/168.2, 164.6; 106/123.1
[56] References Cited
U.S. PATENT DOCUMENTS
2,849,314 8/1958 Goss 162/163
3,159,528 12/1964 Goss 162/163
3,236,720 2/1966 Tousignant et al 162/163
3,615,788 10/1971 Limbert et al 106/123.1
4,357,454 11/1982 Holmberg 106/123.1
FOREIGN PATENT DOCUMENTS
681140 8/1979 U.S.S.R 162/163
Primary Examiner—Peter Chin
Attorney, Agent, or Firm—Andrus, Sceales, Starke &
Sawall
[57] ABSTRACT
A procedure for manufacturing lignocellulosic material products and for improving their strength and water resistance characteristics, high-molar mass lignin derivatives being added to the lignocellulosic material, of which at least 35% by weight are over 5000 in molar mass.
15 Claims, 3 Drawing Sheets
