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Epoxy polyurethane resin wet-strengthening agent and method for preparing same

A technology of epoxy polyamide and wet strength agent, applied in the direction of reinforcing agent addition, etc., can solve the problem of difficult control of product stability, achieve high stability, cheap raw materials, good sizing and water resistance effects

Active Publication Date: 2007-05-23
SHANGHAI DONGSHENG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, the solid content of commercially available wet strength agents is about 12.5%. With the increase of solid content, the stability of the product is more difficult to control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add 51.58 grams of diethylenetriamine, 0.5 grams of 10% hydrochloric acid, and 116 grams of maleic acid in sequence in a 1L flask equipped with a stirrer, a thermometer, a condenser, and a nitrogen inlet and outlet. Stir evenly and heat up to 70°C. , after 1 hour of heat preservation, continue to heat up to 160 ° C, heat preservation reaction for 2 hours. Then cool down to 100° C., add 167 grams of deionized water, adjust the theoretical solid content to 50%, and adjust the viscosity to 750 centipoise (25° C.). It is bright light yellow transparent viscous odorless liquid.

[0025] Add 336 gram deionized waters in reaction system under normal temperature, logical nitrogen after 30 minutes, add 1.6 gram dimethyl diallyl ammonium chlorides in reaction system, then in 10 minutes, drip 1 gram composite initiator (0.7 gram of ammonium persulfate + 0.3 gram of sodium sulfite), reacted at 20°C for 1 hour, then heated up to 35°C and began to drop 46 grams of epichlorohydrin, a...

Embodiment 2

[0028] Add 116 grams of hexamethylenediamine, 40 grams of 20% sulfuric acid, and 214 grams of maleic anhydride to the device in Example 1. After stirring evenly, heat up to 90° C. and keep warm for 2 hours, then continue to heat up to 130° C. The reaction was incubated for 1.5 hours. Then the temperature was lowered to 90° C., 403 grams of deionized water was added, and the theoretical solid content was adjusted to 45%, and the viscosity was 1350 centipoise (25° C.). It is light yellow transparent viscous odorless liquid.

[0029] After passing nitrogen at room temperature for 30 minutes, add 1180 grams of deionized water to the reaction system to adjust the solid content of the system to 17%, add 16.5 grams of dimethyl diallyl ammonium chloride, and add 3.3 grams of composite initiator dropwise within 30 minutes (2.5 grams of potassium persulfate + 0.8 grams of sodium bisulfite), continue to react for 50 minutes, then raise the temperature to 40°C and start adding 46 grams o...

Embodiment 3

[0031] Add 219 grams of trimethylenetetramine, 21.9 grams of 20% phosphoric acid, and 116 grams of fumaric acid successively in the same device as in Example 1. After stirring evenly, heat up to 80°C. After 3 hours of heat preservation, continue to heat up to 110°C and keep warm. React for 0.5 hours. Then cool down to 80° C., add 415 grams of deionized water, adjust the theoretical solid content to 45%, and the viscosity to 940 centipoise (25° C.). It is light yellow transparent viscous odorless liquid.

[0032] Add 388 grams of deionized water to the reaction system at room temperature, and after passing nitrogen for 30 minutes, add 21.9 grams of methacryloyloxyethyltrimethylammonium chloride to the reaction system, and then add 6.7 grams of compound initiator dropwise within 40 minutes. agent (5.5 grams of sodium persulfate + 1.2 grams of sodium bisulfite), reacted at 10°C for 1.5 hours, then raised the temperature to 45°C and began to add 69 grams of epichlorohydrin dropwi...

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Abstract

The epoxy polycyclamide resin wet strength agent featuring in the reaction of polyamine and polyunsaturated acid to make polyamide, which is cationised and then reacts with epichlorohydrin. The final product has a molecular weight range of 100, 000 -150, 000, viscosity range of 10-150 centipoise under normal temperature, with solid content 10-30%. It is applicable for paper making wet strength agent, retention filtration adjuvant, anion catching agent, making the paper having higher glue applicability and water resistance.

Description

technical field [0001] The invention relates to a wet strength agent for papermaking and a preparation method thereof, in particular to an epoxy polyamide resin wet strength agent and a preparation method thereof. technical background [0002] With the development of the paper industry, traditional paper wet strength agents such as urea-formaldehyde resin (UF), melamine-formaldehyde resin (MF), etc. have been increasingly unable to meet the needs of users due to the use conditions and the release of harmful substances. [0003] Polyamide polyamine epichlorohydrin resin (PAE) is a more popular wet strength agent in recent years. It not only has good wet strength effect but also has little environmental pollution and no toxic effect, so it is welcomed by the majority of users. Compared with UF resin and MF resin, it is not only a high-efficiency wet strengthening agent cured under medium alkaline conditions, but also improves the wet strength without losing the softness and ab...

Claims

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Application Information

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IPC IPC(8): D21H21/20C08G69/26C08G69/48
Inventor 施晓旦李丽
Owner SHANGHAI DONGSHENG NEW MATERIALS
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