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Improved retention and drainage in the manufacture of paper

An unsaturated, water-soluble technology for improved retention and drainage in papermaking that addresses issues such as loss of additives and increased costs for papermakers

Inactive Publication Date: 2009-12-16
SOLENIS TECH CAYMAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, underretention increases the papermaker's costs due to the loss of additives intended to be absorbed onto the fibers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0120] Embodiment 1 (comparative example)

[0121] Charge a suitable reaction flask containing surfactant (10.00 g B246SF (Uniqema, New Castle, DE) and 5.00 g of sorbitan monooleate) in paraffin oil (139.72 g, Escaid 110 oil, ExxonMobil, Houston, TX) oil phase.

[0122] An aqueous phase was prepared independently, comprising 50 wt% aqueous acrylamide (AAm) (129.13 g, 50 mole % based on total monomer), glacial acrylic acid (66.11 g, 50 mole % based on total monomer), desiccated Ionized water (106.91 g) and Versenex 80 (Dow Chemical) chelating agent solution (0.69 g). The aqueous solution was adjusted to pH about 5-6 using 50% NaOH solution.

[0123] The water phase is then added to the oil phase while mixing with a homogenizer to obtain a stable water-in-oil emulsion. Afterwards, the emulsion was mixed with a 4-blade glass stirrer for 60 minutes while sparging with nitrogen. During nitrogen sparging, the temperature of the emulsion was adjusted to 57±1°C. Then, the spargi...

Embodiment 2

[0127] Example 2 was prepared as in Example 1, except that the polymerization was started and 4 hours after the polymerization was injected with an initiator comprising 20 moles ppm lauroyl peroxide (LP) in 3 wt% toluene based on the total moles of monomer.

Embodiment 3

[0129] Example 3 was prepared as in Example 1, except that 3wt% toluene solutions containing 20 moles of ppm LP, 10 moles of ppm LP and 10 moles of ppm LP were injected into the total moles of monomers after starting the polymerization, after 1 hour of polymerization and after 4 hours of polymerization. Initiator. For ease of handling, the organic phase was adjusted to 185 g Escaid 110, 5.0 g sorbitan monooleate, and 10.0 g Hypermer B246SF, and the amount of deionized water added to the aqueous phase was reduced to 62.12 g.

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Abstract

The present invention discloses a method for improving retention and drainage in a papermaking process. The method involves adding an associative polymer, a second component and optionally a siliceous material to a papermaking slurry. In addition, a composition comprising an associative polymer and a second component and optionally cellulosic fibers is disclosed.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application No. 60 / 693,855, filed June 24, 2005, which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to a process for the manufacture of paper and board from fibrous raw materials using a flocculation system. Background technique [0004] Retention and drainage are important aspects of papermaking. It is known that certain materials can provide improved retention and / or drainage properties in the manufacture of paper and paperboard. [0005] The preparation of cellulose fiber sheets (sheets), especially paper and board, comprises the following steps: 1) preparing an aqueous slurry of cellulose fibers, which may also contain inorganic mineral extenders or pigments; 2) depositing the slurry on a moving papermaking wire or fabric; and 3) forming a sheet from the solid components of the slurry by filtering ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F2/00
Inventor E·A·S·多尔蒂R·A·格尔曼
Owner SOLENIS TECH CAYMAN