CN104452446A - Preparation method of water absorbent for papermaking - Google Patents

Abstract

The invention discloses a preparation method of a water absorbent for papermaking. The water absorbent for papermaking is prepared from the following raw materials in parts by weight: 20-30 parts of polyvinyl alcohol, 23-28 parts of starch grafted copolymer, 5-10 parts of sorbitol, 2-6 parts of succinic acid, and 1-5 parts of sodium carbonate; a preparation method comprises the following steps: adding polyvinyl alcohol and starch grafted copolymer into a reaction kettle, heating, stirring until the polyvinyl and starch grafted copolymer are entirely dissolved, adding sorbitol, succinic acid and sodium carbonate, performing ultrasonic processing, transferring into the reaction kettle, reacting and cooling to room temperature. The water absorbent for papermaking is prepared from the polyvinyl alcohol, starch grafted copolymer, sorbitol, succinic acid and sodium carbonate, and the prepared absorbent can be used for fast absorbing water while being used for enhancing the wet strength and dry tensile strength of paper.

Description

The preparation method of paper grade (stock) water absorbing agent

Technical field

The present invention relates to pulp technology for making paper, especially a kind of preparation method of paper grade (stock) water absorbing agent.

Background technology

The paper products such as toilet paper and napkin paper require to have good water imbibition, also to possess good wet strength simultaneously, existing however have there is the wet strength that good absorptive paper making additive all can reduce paper, this is because wet strength agent increases the wet strength of paper often by the hydrophobicity increasing paper surface, due to the introducing of hydrophobic group, the water-taking efficiency of water absorbing agent is reduced, effectively can not absorb water.In order to address these problems, there is researcher to pass through to add surfactant and solve effect between wet strength agent and water absorbing agent, but these reagent can cause the intensity of paper to reduce, therefore, urgently there is good water imbibition and do not reduce the water absorbing agent of effect because of the effect of wet strength agent.

Summary of the invention

The object of this invention is to provide a kind of preparation method of paper grade (stock) water absorbing agent, the preparation method of this paper grade (stock) water absorbing agent can solve water absorbing agent reduces effect problem by the impact of wet strength agent.

In order to solve the problem, the technical solution used in the present invention is:

This paper grade (stock) water absorbing agent is prepared from by the raw material of following parts by weight: polyvinyl alcohol 20 parts ~ 30 parts, starch graft copolymer 23 parts ~ 28 parts, sorbierite 5 parts ~ 10 parts, butanedioic acid 2 parts ~ 6 parts, 1 part ~ 5 parts, sodium carbonate;

Preparation method comprises the following steps: in reactor, add polyvinyl alcohol and starch graft copolymer, be warming up to 40 DEG C ~ 55 DEG C, be stirred to the mixing speed of 400 ~ 600 revs/min and dissolve completely, then add sorbierite, butanedioic acid and sodium carbonate successively, to proceed in Ultrasound Instrument washer ultrasonic 5 minutes ~ 10 minutes, then proceed in reactor, react 5 minutes ~ 10 minutes at being warming up to 30 DEG C ~ 40 DEG C, then continue to be warming up to 45 DEG C ~ 55 DEG C, react 7 minutes ~ 12 minutes, be cooled to room temperature.

Owing to have employed technique scheme, the present invention compared with prior art has following beneficial effect:

This paper grade (stock) water absorbing agent is prepared from by polyvinyl alcohol, starch graft copolymer, sorbierite, butanedioic acid, sodium carbonate, and the water absorbing agent obtained can absorb moisture fast while the wet strength increasing page and dry tensile strength.

Detailed description of the invention

Below in conjunction with embodiment, the invention will be further described:

Embodiment 1

The present embodiment paper grade (stock) water absorbing agent is prepared from by the raw material of following parts by weight: polyvinyl alcohol 20 parts, starch graft copolymer 28 parts, sorbierite 7 parts, butanedioic acid 6 parts, 3 parts, sodium carbonate.

Preparation method comprises the following steps: in reactor, add polyvinyl alcohol and starch graft copolymer, be warming up to 40 DEG C, be stirred to the mixing speed of 500 revs/min and dissolve completely, then add sorbierite, butanedioic acid and sodium carbonate successively, to proceed in Ultrasound Instrument washer ultrasonic 10 minutes, then proceed in reactor, react 10 minutes at being warming up to 30 DEG C, then continue to be warming up to 45 DEG C, react 12 minutes, be cooled to room temperature.

Embodiment 2

The present embodiment paper grade (stock) water absorbing agent is prepared from by the raw material of following parts by weight: polyvinyl alcohol 20 parts, starch graft copolymer 28 parts, sorbierite 7 parts, butanedioic acid 6 parts, 3 parts, sodium carbonate.

Preparation method comprises the following steps: in reactor, add polyvinyl alcohol and starch graft copolymer, be warming up to 55 DEG C, be stirred to the mixing speed of 400 revs/min and dissolve completely, then add sorbierite, butanedioic acid and sodium carbonate successively, to proceed in Ultrasound Instrument washer ultrasonic 7 minutes, then proceed in reactor, react 7 minutes at being warming up to 35 DEG C, then continue to be warming up to 50 DEG C, react 7 minutes, be cooled to room temperature.

Embodiment 3

The present embodiment paper grade (stock) water absorbing agent is prepared from by the raw material of following parts by weight: polyvinyl alcohol 20 parts, starch graft copolymer 28 parts, sorbierite 7 parts, butanedioic acid 6 parts, 3 parts, sodium carbonate.

Preparation method comprises the following steps: in reactor, add polyvinyl alcohol and starch graft copolymer, be warming up to 50 DEG C, be stirred to the mixing speed of 600 revs/min and dissolve completely, then add sorbierite, butanedioic acid and sodium carbonate successively, to proceed in Ultrasound Instrument washer ultrasonic 5 minutes, then proceed in reactor, react 5 minutes at being warming up to 40 DEG C, then continue to be warming up to 55 DEG C, react 10 minutes, be cooled to room temperature.

Claims (1)

1. the preparation method of a paper grade (stock) water absorbing agent, it is characterized in that being prepared from by the raw material of following parts by weight: polyvinyl alcohol 20 parts ~ 30 parts, starch graft copolymer 23 parts ~ 28 parts, sorbierite 5 parts ~ 10 parts, butanedioic acid 2 parts ~ 6 parts, 1 part ~ 5 parts, sodium carbonate;

Preparation method comprises the following steps: in reactor, add polyvinyl alcohol and starch graft copolymer, be warming up to 40 DEG C ~ 55 DEG C, be stirred to the mixing speed of 400 ~ 600 revs/min and dissolve completely, then add sorbierite, butanedioic acid and sodium carbonate successively, to proceed in Ultrasound Instrument washer ultrasonic 5 minutes ~ 10 minutes, then proceed in reactor, react 5 minutes ~ 10 minutes at being warming up to 30 DEG C ~ 40 DEG C, then continue to be warming up to 45 DEG C ~ 55 DEG C, react 7 minutes ~ 12 minutes, be cooled to room temperature.