公开(公告)号：US3485667A

公开(公告)日：1969-12-23

申请号：US3485667D

申请日：1968-01-29

Applicant: WESTVACO CORP

Inventor： MAURER HANS W

IPC: C08B30/16 ,  D06B23/22 ,  C13K1/06 ,  C13G1/00 ,  C13L1/00

CPC classification number: D06B23/22 ,  C08B30/16

公开(公告)号：US3859269A

公开(公告)日：1975-01-07

申请号：US40187673

申请日：1973-09-28

Applicant: WESTVACO CORP

Inventor： MAURER HANS W

IPC: C08F8/50 ,  D21H19/60 ,  C08F3/34

CPC classification number: D21H19/60 ,  C08F8/50 ,  C08F8/06 ,  C08F16/06

Abstract: Polyvinyl alcohol (PVA) solutions are reduced in viscosity in a predictable manner by reacting solutions of commercially available PVA with small amounts of hydrogen peroxide at high temperature in the presence of a metallic ion catalyst. The viscosity reductions may be carried out using either a batch process or with a continuous cooking process, to produce film forming solutions of PVA having practical application in the paper industry as either a high speed surface or a coating binder.

公开(公告)号：US3640925A

公开(公告)日：1972-02-08

申请号：US3640925D

申请日：1969-10-16

Applicant: WESTVACO CORP

Inventor： TOUZINSKY GERALD F ,  MAURER HANS W

IPC: C08F251/00 ,  C08F25/00

CPC classification number: C08F251/00

Abstract: PROCESS FOR SIMULTANEOUSLY GELATINIZING STARCH AND INITIATING GRAFT COPOLYMERIZATION BETWEEN A POLYMERIZABLE ETHYLENICALLY UNSATURATED MONOMER AND STARCH WHICH INCLUDES FORMING AN AQUEOUS DISPERSION OF STARCH, MONOMER, AND A PEROXIDIC FREE-RADICAL INITIATOR, AND HEATING THE DISPERSION TO SUBSTANTIALLY INSTANTANEOUSLY GELATINIZE THE STARCH AND INITIATE A GRAFT COPOLYMERIZATION REACTION BETWEEN THE MONOMER AND STARCH.