CN100500750C - Method of preparing multiple starch base high water absorption resin for sanitary article - Google Patents
Method of preparing multiple starch base high water absorption resin for sanitary article Download PDFInfo
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- CN100500750C CN100500750C CNB2007100196676A CN200710019667A CN100500750C CN 100500750 C CN100500750 C CN 100500750C CN B2007100196676 A CNB2007100196676 A CN B2007100196676A CN 200710019667 A CN200710019667 A CN 200710019667A CN 100500750 C CN100500750 C CN 100500750C
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Abstract
The invention discloses a making method of built starch high-adsorbing resin, which comprises the following steps: allocating starch oxide-acrylic acid-AMPS grafted copolymer and crosslinking carboxymethyl starch; blending two materials according to rate; gelatinizing; making piece; grinding; sieving; obtaining easily decomposing product.
Description
Technical field
A kind of preparation method who is used for the built-up starch-base high water-absorption resin of sanitary product belongs to technical field of polymer composite materials.
Background technology
Super absorbent resin is meant the polymer substance that water absorbing properties is strong especially, and its water regain is tens times and even several thousand times of sole mass, and the ability of inhaling physiological saline is generally several times to tens times of sole mass.Super absorbent resin began one's study from about nineteen fifty, began to drop into suitability for industrialized production about nineteen sixty.The super absorbent resin kind is a lot, mainly comprise starch system, cellulose-based, protein system, chemosynthesis system and various compound be super absorbent resin etc.
The R and D of starch-base high water-absorption resin have the history of decades, it is that USDA in 1961 north C.R.Russell of institute etc. begin one's study from starch-grafted vinyl cyanide, its ultimate principle be adopt starch-grafted polymerization then the saponified method produce, vinyl cyanide is grafted on the starch molecule by graft copolymerization, use the basic hydrolysis saponification again, the alcohol washing, methods such as drying and dehydrating are produced, starch gelatinization during saponification, follow-up alcohol washing procedure is difficulty very, need to consume a large amount of alcohol and be used for washing, thereby production cost is very high, market value was progressively replaced by the super absorbent resin of chemosynthesis afterwards than the super absorbent resin height of chemosynthesis.Present widely used super absorbent resin mainly is to adopt chemical process synthetic crosslinked salt polyacrylate, and it inhales the distilled water multiplying power is about 300-500 times, inhales the physiological saline multiplying power and is approximately about 20-50 times.The super absorbent resin of chemosynthesis now has been widely used among many industries such as diaper, sanitary napkin, water-loss reducer of soil, and whole world annual production is more than 1,000,000 tons.The super absorbent resin of chemosynthesis has good water absorbent rate and result of use, and still, also exist following defectives: 1, rise in oil price causes production cost significantly to raise, and present price per ton is ten thousand yuan of 3-5; 2, biological degradation is relatively more difficult, all can not degrade in environment for a long time in the discarded back of super absorbent resin.Owing to these reasons, begin one's study the again super absorbent resin that adopts Starch Production of some country replaces the super absorbent resin of chemosynthesis at present.
Summary of the invention
The purpose of this invention is to provide a kind of preparation method who is used for the built-up starch-base high water-absorption resin of sanitary product, succeed in developing a kind of low built-up starch-base high water-absorption resin that again can fast degraded biologically of higher water absorbent rate, price that has, obtain a kind of cheap and good-quality novel high polymer matrix material.
Technical scheme of the present invention: the preparation method of built-up starch-base high water-absorption resin is composite for adopting Sumstar 190, vinylformic acid and 2-acrylamide-2-methyl propane sulfonic acid (AMPS) graft copolymer and crosslinked carboxymethyl fecula to carry out, and two kinds of raw materials are made a kind of built-up starch-base high water-absorption resin finished product that is used for sanitary product through mixing, gelatinization, film-making, pulverizing, screening.
The quality index of Sumstar 190-vinylformic acid-AMPS graft copolymer is: the mass percentage content of Sumstar 190 is 75%-85%, acrylic acid quality percentage composition is 5%-15%, and the quality percentage composition of 2-acrylamide-2-methyl propane sulfonic acid is 2%-10%.
The quality index of crosslinked carboxymethyl fecula: degree of substitution by carboxymethyl is 0.1-0.6, and degree of crosslinking is that per 100 glucose units have 0.1-1.8 crosslinked group.
Mix: the mass ratio of Sumstar 190-vinylformic acid-AMPS graft copolymer and crosslinked carboxymethyl fecula is 80-90:10-20, carries out thorough mixing in kneader.
Gelatinization: in kneader, carry out gelatinization, gelatinization point 80-120 ℃, time 20-40min.
Film-making: carry out film-making in roller dryer, the film-making temperature is 120-160 ℃, and the time is 3-10min.
Pulverize, sieve: pulverize with the low speed screw feeder, make it become a certain size flap; Successively sieve with 18 orders and 80 mesh sieves then, collection is finished product greater than 80 orders less than 18 purpose flaps.
The application of prepared built-up starch-base high water-absorption resin, be used for sanitary product, the quality percentage composition of Sumstar 190-vinylformic acid in its composite component-AMPS graft copolymer is 80%-90%, and the quality percentage composition of crosslinked carboxymethyl fecula is 10%-20%; The multiplying power of the suction distilled water of finished product is 800-1200 times, and the multiplying power of inhaling physiological saline is 60-100 times; It can use the amylase biodegrade after using, and degradation time can be controlled in 15 minutes; It is discarded in physical environment, can be degraded fast by the microorganism in the physical environment.
Beneficial effect of the present invention: the main body of the built-up starch-base high water-absorption resin of the present invention's preparation is Sumstar 190-vinylformic acid-AMPS graft copolymer, owing to adopt the lower Sumstar 190 of viscosity to replace full-bodied ative starch to prepare super absorbent resin, thereby the problem of viscosity height, operational difficulty when having avoided the ative starch gelatinization, the Sumstar 190 that adds higher proportion in prescription can increase the biological degradability of product, in addition, the adding of AMPS can increase substantially the water-intake rate of product; Add proper amount of cross-linking agent and can improve the problem that reduces owing to the little caused water-intake rate of Sumstar 190 molecular weight.
But, adopt Sumstar 190-vinylformic acid-AMPS graft copolymer also to have some shortcomings separately, mainly be because viscosity is lower, film-making is relatively more difficult on cylinder, can itself and viscosity is higher, production effect crosslinking carboxymethyl starch complex preferably, utilize the good film-making performance of crosslinked carboxymethyl fecula and increase the production effect of product, but the water-intake rate of crosslinked carboxymethyl fecula is lower, the multiplying power of inhaling physiological saline is generally all below 20.The crosslinking carboxymethyl starch complex that will have Sumstar 190-vinylformic acid-AMPS graft copolymer and have good film-making performance than high water absorbing capacity, can give full play to its advantage separately, both has higher water-intake rate thereby prepare, again the compound of film-making fast.
This security of products is good, product is mainly starchbased product, its biodegradability is fabulous, the enzyme decomposition run of carrying out has proved fully that also product has good decomposition rate, under the situation that adding amylase is tested, can all decompose in 15 minutes, and discard in physical environment, also can be degraded fast by the microorganism in the physical environment.Thereby use the diaper packing bag of this product also can make cloth bag, and be immersed in after the use in the enzyme liquid and decompose, thereby become the environmentfriendly products that cloth bag can be recycled, further reduce the overall use cost of this product.
Above-mentioned two kinds of starch ingredients are combined, prepare a kind of advanced composite material, can give full play to the advantage of these two kinds of starch ingredients, overcome its shortcoming, thus prepare can with the built-up starch-base high water-absorption resin of the super absorbent resin of chemosynthesis competition.
Embodiment
Embodiment 1
The quality index of Sumstar 190-vinylformic acid-AMPS graft copolymer is: the mass percentage content of Sumstar 190 is 75%, and acrylic acid quality percentage composition is 15%, and the quality percentage composition of 2-acrylamide-2-methyl propane sulfonic acid is 10%.
The quality index of crosslinked carboxymethyl fecula is: degree of substitution by carboxymethyl is 0.1-0.6, and degree of crosslinking is that per 100 glucose units have 0.1-1.8 crosslinked group.
Mix: the mass ratio of Sumstar 190-vinylformic acid-AMPS graft copolymer and crosslinked carboxymethyl fecula is 80:20, carries out thorough mixing.
Gelatinization: in kneader, carry out gelatinization, 80 ℃ of gelatinization points, time 40min.
Film-making: carry out film-making in roller dryer, the film-making temperature is 120 ℃, and the time is 10min.
Pulverize, sieve: pulverize with the low speed screw feeder, make it become a certain size flap; Successively sieve then with 18 orders and 80 mesh sieves.Collection is product greater than 80 orders less than 18 purpose flaps.
The suction distilled water multiplying power of product is 800 times, and the multiplying power of inhaling physiological saline is 60 times.
Embodiment 2
The quality index of Sumstar 190-vinylformic acid-AMPS graft copolymer is: the mass percentage content of Sumstar 190 is 80%, and acrylic acid quality percentage composition is 10%, and the quality percentage composition of 2-acrylamide-2-methyl propane sulfonic acid is 10%.
The quality index of crosslinked carboxymethyl fecula is: degree of substitution by carboxymethyl is 0.1-0.6, and degree of crosslinking is that per 100 glucose units have 0.1-1.8 crosslinked group.
Mix: the mass ratio of Sumstar 190-vinylformic acid-AMPS graft copolymer and crosslinked carboxymethyl fecula is 85: 15, carries out thorough mixing.
Gelatinization: in kneader, carry out gelatinization, 120 ℃ of gelatinization points, time 20min.
Film-making: carry out film-making in roller dryer, the film-making temperature is 160 ℃, and the time is 3min.
Pulverize, sieve: pulverize with the low speed screw feeder, make it become a certain size flap; Successively sieve then with 18 orders and 80 mesh sieves.Collection is product greater than 80 orders less than 18 purpose flaps.
The suction distilled water multiplying power of product is 1000 times, and the multiplying power of inhaling physiological saline is 80 times.
Embodiment 3
The quality index of Sumstar 190-vinylformic acid-AMPS graft copolymer is: the mass percentage content of Sumstar 190 is 85%, and acrylic acid quality percentage composition is 10%, and the quality percentage composition of 2-acrylamide-2-methyl propane sulfonic acid is 5%.
The quality index of crosslinked carboxymethyl fecula: degree of substitution by carboxymethyl is 0.1-0.6, and degree of crosslinking is that per 100 glucose units have 0.1-1.8 crosslinked group.
Mix: the mass ratio of Sumstar 190-vinylformic acid-AMPS graft copolymer and crosslinked carboxymethyl fecula is 90:10, carries out thorough mixing.
Gelatinization: in kneader, carry out gelatinization, 100 ℃ of gelatinization points, time 30min.
Film-making: carry out film-making in roller dryer, the film-making temperature is 140 ℃, and the time is 6min.
Pulverize, sieve: pulverize with the low speed screw feeder, make it become a certain size flap; Successively sieve then with 18 orders and 80 mesh sieves.Collection is product greater than 80 orders less than 18 purpose flaps.
The suction distilled water multiplying power of product is 1200 times, and the multiplying power of inhaling physiological saline is 100 times.
Claims (2)
1, a kind of preparation method of built-up starch-base high water-absorption resin, it is composite to it is characterized in that adopting Sumstar 190, vinylformic acid and 2-acrylamide-2-methyl propane sulfonic acid graft copolymer and two kinds of raw materials of crosslinked carboxymethyl fecula to carry out, and two kinds of raw materials are made the built-up starch-base high water-absorption resin finished product that is used for sanitary product through mixing, gelatinization, film-making, pulverizing and screening;
The quality index of Sumstar 190, vinylformic acid and 2-acrylamide-2-methyl propane sulfonic acid graft copolymer is: the quality percentage composition of Sumstar 190 is 75%-85%, acrylic acid quality percentage composition is 5%-15%, and the quality percentage composition of 2-acrylamide-2-methyl propane sulfonic acid is 2%-10%;
The quality index of crosslinked carboxymethyl fecula is: degree of substitution by carboxymethyl is 0.1-0.6, and degree of crosslinking is that per 100 glucose units have 0.1-1.8 crosslinked group;
Mix: the mass ratio of Sumstar 190, vinylformic acid and 2-acrylamide-2-methyl propane sulfonic acid graft copolymer and crosslinked carboxymethyl fecula is 80-90:10-20, carries out thorough mixing in kneader;
Gelatinization: in kneader, carry out gelatinization, gelatinization point 80-120 ℃, time 20-40min;
Film-making: carry out film-making on roller dryer, the film-making temperature is 120-160 ℃, and the time is 3-10min;
Pulverize, sieve: pulverize with the low speed screw feeder, make it become flap; Successively sieve with 18 orders and 80 mesh sieves then, collection is finished product greater than 80 orders less than 18 purpose flaps.
2, the application of the built-up starch-base high water-absorption resin of the described method preparation of claim 1 is characterized in that being used for sanitary product, and the multiplying power that finished product is inhaled distilled water is 800-1200 times, and the multiplying power of inhaling physiological saline is 60-100 times; It can use the amylase biodegrade after using, and degradation time can be controlled in 15 minutes; It is discarded in physical environment, can be degraded fast by the microorganism in the physical environment.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100196676A CN100500750C (en) | 2007-01-29 | 2007-01-29 | Method of preparing multiple starch base high water absorption resin for sanitary article |
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| CNB2007100196676A CN100500750C (en) | 2007-01-29 | 2007-01-29 | Method of preparing multiple starch base high water absorption resin for sanitary article |
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| CN101012320A CN101012320A (en) | 2007-08-08 |
| CN100500750C true CN100500750C (en) | 2009-06-17 |
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| CNB2007100196676A Expired - Fee Related CN100500750C (en) | 2007-01-29 | 2007-01-29 | Method of preparing multiple starch base high water absorption resin for sanitary article |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103374104B (en) * | 2012-04-28 | 2015-06-17 | 台湾塑胶工业股份有限公司 | Preparation method of super absorbent polymer (SAP) |
| CN110003389A (en) * | 2019-03-25 | 2019-07-12 | 北京林业大学 | A kind of environment-friendly type agricultural water-retaining agent and preparation method thereof |
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