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High-adhesion starch size and preparation method thereof

A technology of starch size and high adhesion, applied in textiles and papermaking, fiber treatment, plant fiber, etc., can solve the problems of reducing the brittleness of fiber and starch glue, hard to degrade plasticizer, complicated manufacturing process, etc., and achieve impossible The effect of less control factors, good flexibility and long molecular chain

Inactive Publication Date: 2019-07-09
湖北顶新环保新材料有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN201710605460.0 discloses a method for improving the adhesive strength of starch slurry. The starch is subjected to two-step reactions of carboxymethyl etherification and propionate esterification to obtain oil / water amphiphilic starch derivatives. , and then mix oil / water amphiphilic starch derivatives with hydroxyl plasticizers and amino plasticizers to obtain an adhesion promoter; it is recorded that the surface activity of oil / water amphiphilic starch is used to improve the effect of starch size on fibers The wettability and soaking degree of the plasticizer reduce the brittleness of the fiber and starch glue, thereby improving the adhesive strength of the starch size, although the method of this patent can improve the adhesion of the starch size to the polyester staple fiber to a certain extent. However, there are still disadvantages such as complex manufacturing process, difficult degradation of plasticizer, and insufficient adhesion

Method used

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  • High-adhesion starch size and preparation method thereof
  • High-adhesion starch size and preparation method thereof

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preparation example Construction

[0024] The invention provides a kind of preparation method of high adhesion starch size, comprises the following steps:

[0025] (1) adding water to gelatinize cornstarch after irradiation treatment to obtain gelatinized starch;

[0026] (2) vinyl acetate, acrylic acid and initiator are mixed to carry out polymerization reaction, obtain copolymer;

[0027] (3) mixing the copolymer, gelatinized starch and ammonium cerium nitrate aqueous solution to carry out graft copolymerization, and obtaining high-adhesion starch slurry after neutralization with alkali;

[0028] The steps (1) and (2) are not limited by time sequence.

[0029] In the invention, the cornstarch is irradiated and gelatinized by adding water to obtain the gelatinized starch. In the present invention, the moisture content of the cornstarch is preferably 60 For Co-γ, the irradiation dose is preferably 4-40 kGy, more preferably 20-40 kGy, even more preferably 30-40 kGy. The present invention adopts 60 As an irra...

Embodiment 1

[0039] A kind of high adhesion starch size, its preparation comprises the following steps:

[0040] (1) Take 300g of corn starch (moisture content 14%) and place in 60 Co-γ irradiation field irradiation, the irradiation dose is 4kGy, add water 9 times the weight of the irradiation powder, put it in a glass reactor, protect it with nitrogen, raise the temperature from room temperature to 95°C, and gelatinize for 30 minutes. And keep warm for 30 minutes to obtain gelatinized starch;

[0041] (2) Take 700 g of monomers (550 g of vinyl acetate, 150 g of acrylic acid) and 2 g of dimethyl azobisisobutyrate in a 69° C. water bath for 40 minutes, protect with nitrogen, and stir at a speed of 200 rpm to obtain a copolymer;

[0042] (3) the gelatinized starch of step (1) is cooled to 55 ℃ and the copolymer is mixed homogeneously, then dripping concentration is the ceric ammonium nitrate aqueous solution catalytic grafting copolymerization reaction (containing ceric ammonium 15g) of 5wt...

Embodiment 2

[0044] A kind of high-adhesion starch slurry has improved irradiation dose relative to embodiment 1, and its preparation may further comprise the steps:

[0045] (1) Take 300g of cornstarch (moisture content 14%) and place it in a 60Co-γ irradiation field for irradiation. The irradiation dose is 20kGy, add water 9 times the weight of the irradiation powder, put it in a glass reaction kettle, and pass nitrogen protection , the temperature was raised from room temperature to 95°C, gelatinized for 30 minutes, and kept for 30 minutes to obtain gelatinized starch;

[0046] (2) Take 700 g of monomers (550 g of vinyl acetate, 150 g of acrylic acid) and 2 g of dimethyl azobisisobutyrate in a 69° C. water bath for 40 minutes, protect with nitrogen, and stir at a speed of 200 rpm to obtain a copolymer;

[0047] (3) the gelatinized starch of step (1) is cooled to 55 ℃ and the copolymer is mixed homogeneously, then dripping concentration is the ceric ammonium nitrate aqueous solution cata...

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Abstract

The invention provides a high-adhesion starch size and a preparation method thereof and belongs to the technical field of textile sizes. The preparation method comprises irradiating corn starch, and adding water to carry out gelatinization to obtain gelatinized starch; mixing vinyl acetate, acrylic acid and an initiator, and carrying out polymerizing to obtain a copolymer; mixing the copolymer, the gelatinized starch and ceric ammonium nitrate solution, carrying out grafting copolymerization, and adding a base for neutralization to obtain the high-adhesion starch size. Copolymerization of acrylic acid and vinyl acetate is easy to control; the attained copolymer has longer molecular chains and better flexibility. The grafting copolymerization is catalyzed with the single catalyst ceric ammonium nitrate, and has fewer uncontrollable factors, milder process and higher efficiency than a multi-system mixed catalyst. The ceric ammonium nitrate has adhesive power of 83.9 N for cotton and adhesive power of 119.42 N for polyester-cotton, and a film formed by the high-adhesion starch size has good flexibility.

Description

technical field [0001] The invention belongs to the technical field of textile size, and in particular relates to a high-adhesion starch size and a preparation method thereof. Background technique [0002] The textile processing process is to spin the fiber into yarn and then weave it into cloth. Before the yarn is woven into cloth, the warp yarn must be sized to improve the weavability of the yarn, so that the yarn will be lint-free and less broken during the weaving process; The warp yarns of a small part of strands, strong twisted yarns and some textured yarns do not need sizing, while other forms of warp yarns need sizing. After the weaving process is completed, the size on the gray cloth will affect the water absorption performance of the fabric and the dyeing quality of the product. In order to reduce the consumption of dyeing chemicals, it is necessary to desizing before dyeing. The wastewater produced by scouring and desizing in printing and dyeing generally account...

Claims

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Application Information

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IPC IPC(8): D06M15/11C08G81/02C08B30/18C08B31/00C08J3/28C08F218/08C08F220/06C08L3/02D06M101/06
CPCC08B30/18C08B31/00C08F218/08C08G81/021C08J3/28C08J2303/02D06M15/11D06M2101/06C08F220/06
Inventor 王晓广周盼张文馨肖成夏发明黄年华王海清
Owner 湖北顶新环保新材料有限公司
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