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    • 71. 发明授权
    • Sizing agent composite for papermaking
    • 上浆剂复合造纸
    • US5399660A
    • 1995-03-21
    • US54975
    • 1993-04-30
    • Sadayuki UchidaTomohiko NakataYoshihide IshikawaMasao HamadaShinichi KimuraSatoru Iwasa
    • Sadayuki UchidaTomohiko NakataYoshihide IshikawaMasao HamadaShinichi KimuraSatoru Iwasa
    • C08G63/553C09F1/04D21H17/62C08G63/54C08G63/12
    • D21H17/62C08G63/553C09F1/04
    • The invention provides a sizing agent with good stability, particularly which is rapid in getting started in the neutral zone and a method of producing the same.A sizing agent for papermaking in neutral zone is characterized by a main component of said sizing agent being selected from the group consisting of a diester of rosin-based substances having a dicarboxylic acid or acid anhydride group expressed by the following formula (I), ##STR1## (in which R.sub.1 represents a rosin acid residue or maleopimaric acid, R.sub.2 represents a dihydric alcohol residue and R.sub.3 represents a maleopimaric acid residue); and 2) a polyester reaction product expressed by the following formula (I'), ##STR2## (in which R'.sub.1 and R'.sub.5 represent a rosin acid residue or an .alpha.,.beta.-unsaturated polybasic carboxylic acid added rosin residue, at least one of them represents .alpha.,.beta.-unsaturated polybasic carboxylic acid added rosin residue, R'.sub.2 and R'.sub.4 represent polyhydric alcohol residues, R'.sub.3 represents a polybasic carboxylic acid residue being at least tribasic, x and z are integers of 1 to 3, y is 0, 1 or 2 and m and n are 1 or 2); and 3) a mixture comprising a rosin, a rosin modified by .alpha.,.beta.-unsaturated carboxylic acid and/or or an anhydride thereof and a polyhydric alcohol ester of rosin.
    • 本发明提供了具有良好稳定性的上胶剂及其制备方法,特别是在中性区域中开始快速。 中性区造纸用上浆剂的特征在于所述施胶剂的主要组分选自具有由下式(I)表示的二羧酸或酸酐基团的松香基物质的二酯, (I)(其中R 1表示松香酸残基或马来酸戊二酸,R 2表示二元醇残基,R 3表示马来酸戊酸残基); 和2)由下式(I')表示的聚酯反应产物,其中R'1和R'5代表松香酸残基或加入的α,β-不饱和多元羧酸 松香残基,其中至少有一个代表α,β-不饱和多元羧酸加入的松香残基,R'2和R'4代表多元醇残基,R'3代表至少是三元的多元羧酸残基,x和z 为1〜3的整数,y为0,1或2,m和n为1或2); 和3)包含松香,由α,β-不饱和羧酸和/或其酸酐改性的松香和松香的多元醇酯的混合物。