Anti-soiling agent composition

Abstract

[Object] To provide an anti-soiling agent compound that can sufficiently prevents adhesion of pitch to a dry part region.[Solution] The present invention provides an anti-soiling agent composition is provided with: a low molecular polysiloxane compound represented by the following formula (1); and a high molecular polysiloxane compound represented by the following formula (2), and characterized in that the number of modified groups per low molecular polysiloxane compound is in a range from 0.1 to 3, the number of modified groups per high molecular polysiloxane compound is in a range from 1.0 to 10, and the number m of repeating polysiloxane units in the low molecular polysiloxane compound and the number n of repeating polysiloxane units in the high molecular polysiloxane compound have the following relationship: 2 m≦n,[in formula (1), substituent R1 represents a methyl group or a modified group, with the repeating number m being set to an integer from 20 to 200], and[in formula (2), substituent R2 represents a methyl group or a modified group, with the repeating number n representing an integer].

Description

TECHNICAL FIELD[0001]The present invention relates to an anti-soiling agent composition, and more specifically concerns such an anti-soiling agent composition as to sufficiently prevent pitch contamination in a dry part.BACKGROUND ART[0002]A paper-making process for producing paper is generally provided with a wire part in which a liquid prepared by dispersing pulp fibers in water is mounted on a net (wire) so that excessive water is allowed to naturally drop down so as to prepare wet paper, a press part that allows the wet paper to pass between paired press rolls so that by pressing it between the pressing rolls with a felt being interpolated therebetween so as to transfer moisture in the wet paper onto the felt so that the wet paper is dehydrated, a dry part that makes the wet paper that has passed through the pressing device in contact with a heated cylinder to be dried to form paper, and a reel part that winds and takes up the paper onto a rod referred to as a spool.[0003]In the...

AI Technical Summary

Benefits of technology

The present invention relates to an anti-soiling agent composition for preventing pitch adhesion in a paper-making process. The composition includes a low molecular polysiloxane compound (Formula 1) and a high molecular polysiloxane compound (Formula 2), with a specific number of modified groups and repeating polysiloxane units designed to achieve a pitch adhesion-preventing effect and a dispersing effect, respectively. The modified groups can include amino, epoxy, polyether, carboxyl, or phenyl groups. The composition can have improved flowability and ease of handling. It can be applied to a dry part region to prevent pitch adhesion and promote paper-making quality.

Problems solved by technology

In the dry part, a problem is raised in that pitch tend to adhere to the surface of each of a cylinder, a canvas, a calendar roll, a breaker stack roll, etc.

When the pitch adhere to these, paper is contaminated, resulting in serious degradation of the yield.

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