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Starch-based nano biological latex and preparation method thereof

A technology of biological latex and starch derivatives, applied in the directions of starch-derived adhesives, starch adhesives, adhesives, etc., can solve the problems of high price and limited resources, and achieve narrow molecular weight distribution, low viscosity and small particle size. Effect

Inactive Publication Date: 2011-07-06
EVERFIRST WISEFUND TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of starch-based nano-biological latex, so as to overcome the defects of relatively expensive price and limited resources in the petroleum-based styrene-butadiene latex used in the existing papermaking field

Method used

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  • Starch-based nano biological latex and preparation method thereof
  • Starch-based nano biological latex and preparation method thereof
  • Starch-based nano biological latex and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Original cassava starch (34.9kg, water content is 14wt%, the amount of the absolute dry tapioca original starch is about 30kg), polyethylene glycol (4.5kg, accounts for 15% of absolute dry starch), sulfuric acid (1.5kg, accounts for absolute 5% of dry starch), calcium stearate (0.3kg, account for 1% of absolute dry starch), water (31.1kg), mix and stir at room temperature and make premix after 30min, the total water content of gained mixture is 45%. Adjust the temperature of the extruder to 120° C., put the mixed material into the extruder (co-rotating twin-screw extruder), and feed the material at a rate of 8.0 kg / h. The screw speed is 150 rpm, and the extrudate is extruded through five dies (hole diameter is 3mm) and pelletized simultaneously. Obtain 36.3kg starch-based nano-biological latex, the viscosity at 50% concentration by weight and 25° C. is 260 cps, the particle diameter is 320 nm, and the ratio of weight-average molecular weight to number-average molecular...

Embodiment 2

[0033] Raw tapioca starch (34.9kg, moisture content is 14% by weight, the amount of dry tapioca raw starch is about 30kg), ethylene glycol (4.5kg, accounts for 15% of dry starch), sulfuric acid (1.5kg, Accounting for 5% of dry starch), lecithin (0.3kg, accounting for 1% of dry starch), water (19.3kg), stirred at room temperature for 20min to make a premix mixture, the total water content of the resulting mixture is 40 %. Adjust the temperature of the extruder to 125° C., put the mixed material into the extruder (co-rotating twin-screw extruder), and feed the material at a rate of 8.5 kg / h. The screw speed is 200rpm, and the extrudate is extruded through five dies (hole diameter is 3mm) and granulated at the same time. Obtain 36.3kg starch-based nano biolatex, the viscosity at 50% concentration by weight at 25°C is 300cps, the particle diameter is 320nm, and the ratio of weight average molecular weight to number average molecular weight is 1.5.

Embodiment 3

[0035] Potato raw starch (34.9kg, moisture content is 14% by weight, dry potato raw starch is about 30kg), ethylene glycol (4.5kg, accounts for 15% of dry starch), maleic acid (1.2kg, Accounting for 4% of dry starch), lecithin (0.3kg, accounting for 1% of dry starch), water (21.2kg), mixed and stirred at room temperature for 20min to make a premix mixture, the total water content of the resulting mixture is 42%. Adjust the temperature of the extruder to 115° C., put the mixed material into the extruder (co-rotating non-intermeshing twin-screw extruder), and feed the material at a rate of 8.0 kg / h. The screw speed is 200rpm, and the extrudate is extruded through five dies (aperture is 3mm) and granulated simultaneously, obtains 36kg starch-based nano biolatex, the viscosity at 50% concentration by weight, 25 ℃ is 320cps, granule The diameter is 480nm, and the ratio of weight average molecular weight to number average molecular weight is 1.4.

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Abstract

The invention relates to a starch-based nano biological latex and a preparation method thereof. The starch-based nano biological latex comprises the following components by weight percent: starch with 14 percent of water content or starch derivative, 10 to 22.2 percent of plasticizer, 0.17 to 2 percent of lubricant and 0.17 to 15 percent of starch modifying agent, and the weight percent is based on the weight of absolute dried starch or starch derivative. The starch-based nano biological latex has the advantages of low viscosity, good viscosity stability, high binding power and the like, also has the characteristics of narrow molecular weight distribution and excellent film forming property and can be used for partially or completely replacing the petroleum base styrene butadiene latex applicable to the filed of papermaking.

Description

technical field [0001] The invention relates to a starch-based nano-biological latex and a preparation method thereof, in particular to a starch-based nano-biological latex for papermaking. Background technique [0002] As people's requirements for paper quality are increasing day by day, more and more paper-making enterprises choose to use coating to improve paper quality. As one of the main components of paper coating, latex plays a decisive role in the quality of coating and paper. However, latex as a petroleum-based product, with the increasing shortage of petroleum resources and the growing awareness of people's environmental protection, more and more paper-making companies and paper-making chemical companies have begun to study renewable environmentally friendly adhesives to replace the current petroleum cracking products. Petroleum-based latex synthesized from butadiene and styrene as the main monomers. [0003] At present, most coated paper companies choose to incre...

Claims

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Application Information

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IPC IPC(8): C08L3/02C08L3/04C08L3/10C08L3/06C08L3/08B29B9/06B29C47/92C09J103/02C09J103/04C09J103/10C09J103/06C09J103/08C09J11/00D21H19/00B29C48/92
CPCB29C48/04B29C48/92
Inventor 雷得定王然王跃斌
Owner EVERFIRST WISEFUND TECH BEIJING
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