A spiral ring full road interchange system

A manufacturing method and additive technology, which are applied in papermaking, reinforcing agent addition, textile and papermaking, etc., can solve the problems of improved water drainage, weak flocculation, insufficient expansion of molecular structure, etc., and achieve improved retention rate and improved drainage. Effect

Active Publication Date: 2016-05-18
KURITA WATER INDUSTRIES LTD
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

In addition, the molecular structure of the Hoffman reactant cannot be fully expanded and the flocculation is weak, so there is a problem that the effect of improving the retention rate and the effect of improving the water drainage cannot be obtained sufficiently (see Patent Document 1)

Method used

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  • A spiral ring full road interchange system
  • A spiral ring full road interchange system
  • A spiral ring full road interchange system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0056] (Polymer A)

[0057] In a four-neck flask equipped with a stirrer and a temperature sensor, 198 g of acrylamide (AAM) powder and 793 g of ion-exchanged water were added, and the weight of the monomer was 20% of the whole, and the total weight was adjusted to 990 g. Next, the temperature was adjusted to 20° C., and nitrogen substitution was performed. Add 1ml of ammonium persulfate 0.1% aqueous solution and 0.3g of 2,2'-azobis-2-amidinopropane hydrochloride aqueous solution to the adjusted solution, and then continue nitrogen replacement, after about 5 minutes Start to aggregate. The temperature was slowly raised to about 65°C, and the polymerization was completed in 5 hours.

[0058] During polymerization, the content became highly viscous and stirring became difficult, so stirring was stopped halfway. After the polymerization was terminated, the contents were taken out. The polymer has an intrinsic viscosity of about 14.8 dl / g. In addition, a very high-purity non...

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PUM

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Abstract

The present disclosure is directed to providing a spiral road junction system. More specifically the present disclosure relates to a system for connecting a plurality of highway spokes via a spiral road junction comprising adjacent-spoke connecting roads associated with each highway spoke, and a ring-road interchange traversing all the highway spokes. The ring-road interchange provides a continuous path from a slip road diverging from an entry highway spoke to an access road merging with an exit highway spoke.

Description

technical field [0001] The present invention relates to a method for producing an additive for papermaking, comprising an intermediate of the additive for papermaking comprising a polyacrylamide-based polymer and subjecting the intermediate to a Hofmann decomposition reaction. Background technique [0002] In recent years, various additives for papermaking have been used in the papermaking process to improve retention and drainage. For example, as a retention aid, a cationic copolymer (C-PAM) of dimethylaminoethyl (meth)acrylate (DAA) and acrylamide (AAM) is mainly used. In addition, polyethyleneimine and polyvinylamine are mainly used as water drainage improvers. [0003] DAA-PAM retention aids have a large molecular weight, but the cationic groups of DAA are far away from the main chain. Therefore, although the effect of improving the retention rate is remarkable, there is a problem that the flocs in papermaking are large, and the texture often collapses, causing poor de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H17/37C08F8/00
CPCD21H21/18D21H17/37D21H17/375
Inventor 陈嘉義
Owner KURITA WATER INDUSTRIES LTD
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