Method of using an anti-soiling agent composition

摘要

[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].;

主权项

1. A method of using an anti-soiling agent composition for preventing pitch contamination in a dry part of a paper-making process, the method comprising:
applying the anti-soiling agent composition to cylinders of the dry part for use therein, wherein the anti-soiling agent composition comprises: a low molecular polysiloxane compound for dispersing pitch, represented by the following formula (1); and a high molecular polysiloxane compound for use in forming a coat film on the dry part, represented by the following formula (2), wherein the low molecular polysiloxane compound has a kinematic viscosity at 25° C. in a range from 10 to 300 mm2/s, while the high molecular polysiloxane compound has a kinematic viscosity at 25° C. in a range from 40 to 90000 mm2/s, wherein the modified group in the low molecular polysiloxane compound is an amino-modified group or a polyether-modified group and the modified group in the high molecular polysiloxane compound is an amino-modified group or a polyether-modified group, wherein the number of modified groups per low molecular polysiloxane compound is in a range from 0.1 to 2.0 and the number of modified groups per high molecular polysiloxane compound is in a range from 1.0 to 6.0, 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, wherein the high molecular polysiloxane compound has a compounding ratio in a range from 1 to 20% by weight, the low molecular polysiloxane compound has a compounding ratio in a range from 5 to 20% by weight, and the low molecular polysiloxane compound has a compounding ratio in a range from 0.1 to 10 parts by weight relative to 1 part by weight of the high molecular polysiloxane compound, wherein the anti-soiling agent composition is sprayed to the cylinders by using a spraying nozzle so that the sprayed amount thereof per unit area of paper passing therethrough is set in a range from 10 μg/m2 to 1000 μg/m2 as a solid component of the polysiloxane compound, wherein substituent R1 represents a methyl group or a modified group, with the repeating number m being set to an integer from 20 to 50, and wherein substituent R2 represents a methyl group or a modified group, with the repeating number n representing an integer of 280 or more and less than 1430.