【発明の名称】高い乾燥強度及び湿潤強度を有する紙の製法

Title:

【発明の名称】高い乾燥強度及び湿潤強度を有する紙の製法

Document Type and Number:

Japanese Patent JPH0676450

Kind Code:

B2

Abstract:

Water-soluble copolymers containing copolymerized vinylamine units are prepared by copolymerizing (a) from 95 to 10 mol % of N-vinylformamide and (b) from 5 to 90 mol % of an ethylenically unsaturated monomer from the group consisting of vinyl acetate, vinyl propionate, C1-C4-alkyl vinyl ethers, the esters, nitriles and amides of acrylic acid and methacrylic acid and N-vinylpyrrolidone, and then eliminating from 30 to 100 mol % of the formyl groups from the copolymer. Preferred copolymers are copolymers of N-vinylformamide and vinyl acetate, in which from 30 to 100 mol % of the monomer units are hydrolyzed. The copolymers are used in papermaking to increase the dry strength and wet strength of the paper.

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Inventors:

JIIKUBERUKU PUFUOORU
MIHAERU KUREENAA
HAINRITSUHI HARUTOMAN
WARUTAA DENTSUINGAA

Application Number:

JP22224586A

Publication Date:

September 28, 1994

Filing Date:

September 22, 1986

Export Citation:

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Assignee:

BASF AG

International Classes:

C08F8/12; C08F16/16; C08F18/02; C08F20/52; C08F26/00; C08F26/06; C08F216/16; C08F216/18; C08F218/02; C08F218/04; C08F218/08; C08F218/10; C08F220/00; C08F220/02; C08F220/10; C08F220/18; C08F220/42; C08F220/56; C08F226/02; C08F226/10; D21H17/34; D21H17/36; D21H17/37; D21H17/45; D21H21/18; (IPC1-7): C08F8/12; C08F216/16; C08F218/04; C08F218/08; C08F226/02; C08F226/10; D21H17/37

Domestic Patent References:

JPS5823809A

Foreign References:

US4490557A

Attorney, Agent or Firm:

Toshio Yano (1 outside)

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