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Title:
NEUTRAL SIZING AGENT FOR PAPER MANUFACTURING
Document Type and Number:
Japanese Patent JP3386880
Kind Code:
B2
Abstract:

PURPOSE: To obtain a sizing agent manifesting excellent sizing effect under neutral or alkaline papermaking conditions, by dispersing a specific modified resin in water.
CONSTITUTION: An adduct produced by adding an α,β-unsaturated acid such as (meth)acrylic, maleic or fumaric acid to a rosin such as gum rosin, tall rosin or wood rosin and a modified resin 25-90 in acid value of the formula (R is a ≥1C hydrocarbon; (l) and (n) each is ≥1) prepared by dehydrating condensation between a dibasic organic acid such as adipic acid (or malonic acid, succinic acid, etc.), and a glycerol compound (e.g. glycerol, diglycerol, triglycerol) are dispersed in water to obtain the objective neutral sizing agent for paper manufacturing. This sizing agent manifests excellent sizing effect even in the case highly filled paper containing a large amount of strongly alkaline soft calcium carbonate as filler is manufactured by papermaking process.


Inventors:
Hideto Yamada
Taro Harada
Application Number:
JP8273594A
Publication Date:
March 17, 2003
Filing Date:
March 30, 1994
Export Citation:
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Assignee:
Star light chemical industry
International Classes:
C08L67/02; C08L67/00; C08L71/02; D21H17/53; D21H17/62; D21H21/16; (IPC1-7): D21H21/16; C08L67/02; C08L71/02
Domestic Patent References:
JP5251444A
JP491247B1
Attorney, Agent or Firm:
Masayuki Asakura