Epoxy polyamide resin wet strength agent and preparation method thereof

A technology of epoxy polyamide and wet strength agent, which is applied in the direction of reinforcing agent addition, etc. It can solve the problems of low polymer molecular weight, serious volatilization of raw materials, and affecting the use effect, etc., and achieve high molecular weight distribution, less volatilization loss, and high wet strength. effect of effect
CN101747504AActive Publication Date: 2010-06-23SHANGHAI DONGSHENG NEW MATERIALS
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANGHAI DONGSHENG NEW MATERIALS
Publication Date
2010-06-23

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Abstract

The invention discloses an epoxy polyamide resin wet strength agent and a preparation method thereof. The preparation method comprises the following steps: (1) the pressure reaction of aliphatic polyamine and aromatic polyprotic acid is carried out; and (2) the water is added in a condensation compound in step (1), the epichlorohydrin is then added for normal pressure reaction, and the epoxy polyamide resin wet strength agent is obtained. The epoxy polyamide resin wet strength agent prepared by adopting the above method has the viscosity of 50-250 centipoises under 25 DEG C, the solid content of 10-30% by weight percent and the molecular weight range of 170, 000-180, 000. Compared with the conventional wet strength agent, the epoxy polyamide resin wet strength agent has higher wet strength effect as well as obvious dry-strengthening function, and also leads the paper to have better sizing degree and water resistance. The product has higher stability owing to the function of the aromatic group and can be stored for more than half a year under the normal temperature without influencing the using effect.
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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) and melamine-formaldehyde resin (MF) are 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 absorbency ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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