CN112011101A - Green and environment-friendly natural latex and ammonia-free preservation method thereof - Google Patents
Green and environment-friendly natural latex and ammonia-free preservation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L7/00—Compositions of natural rubber
- C08L7/02—Latex
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
- B65D25/02—Internal fittings
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F253/00—Macromolecular compounds obtained by polymerising monomers on to natural rubbers or derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/262—Alkali metal carbonates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
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Abstract
The invention discloses a green environment-friendly natural latex which is prepared from the following components in parts by weight: 20-50 parts of fresh latex, 10-20 parts of maleic anhydride, 5-12 parts of ethylene glycol, 3-5 parts of palm oil residue, 0.2-0.3 part of catalytic enzyme, 1-2 parts of cross-linked hydroxyethyl cellulose grafted acrylamide polymer, 1-2 parts of sodium polyacrylate, 0.5-1 part of sodium carbonate, 1-2 parts of sodium silicate, 0.5-1 part of citric acid and 1-2 parts of sodium benzoate. Filtering fresh latex, removing impurities, adding weak base salt, clarifying and settling for 12-36 hours, and controlling the alkalinity of the fresh latex to be 0.06% -0.1%; then adding maleic anhydride, ethylene glycol, palm oil residue and catalytic enzyme into the fresh latex, stirring, and standing for 4-8 h; the cross-linked hydroxyethyl cellulose grafted acrylamide polymer, sodium polyacrylate, sodium carbonate, sodium silicate, citric acid and sodium benzoate are mixed and then added into the fresh latex, and the green environment-friendly natural latex is formed after 12-18 h. The preparation process is safe and nontoxic, and ammonia water is not used in any link.
Description
Technical Field
The invention relates to the technical field of rubber, in particular to green environment-friendly natural latex and an ammonia-free preservation method thereof.
Background
Rubber is an important industrial raw material, and is called four industrial raw materials with steel, petroleum and coal. The rubber has special high elasticity, good physical and mechanical properties and good electric insulation performance, so that the rubber has extremely wide application. The consumption of rubber is therefore high. Commonly used rubbers include natural and synthetic rubbers. The worldwide demand is up to 2000 ten thousand tons at present, wherein 1200 ten thousand tons of synthetic rubber and 800 ten thousand tons of natural rubber are available. But synthetic rubber cannot replace natural rubber. The natural rubber yield of China only accounts for 7 percent of the world, and the demand accounts for more than 22 percent of the world.
Natural rubber is rubber extracted from rubber-containing plants. The latex collected from the rubber tree is a milky white liquid, similar in appearance to milk; it is a product biosynthesized by rubber trees, has very complex components, contains rich non-rubber substances such as protein, saccharides, lipid, inorganic salt, enzyme and the like besides rubber hydrocarbon and water, and can be easily and quickly decayed under the action of bacteria and enzyme, thereby influencing the quality and the economic benefit of the product.
For a long time, in rubber production, in order to prevent the volatile acid value of fresh latex from increasing, keep fresh latex from putrefactive and coagulating before processing and keep processing stability, it is common practice to add ammonia for freshness preservation after collection. However, ammonia has strong pungent odor and corrosiveness, seriously affects the working and production environment, harms the physical health of workers, pollutes the environment, increases the acid amount for latex solidification in the later period and increases the production cost.
Disclosure of Invention
The invention aims to provide the environment-friendly natural latex, reduce the emission of waste water and waste gas and reduce the overall production cost.
In order to solve the technical problems, the invention adopts the following technical scheme: the green environment-friendly natural latex comprises the following components in parts by weight: 20-50 parts of fresh latex, 10-20 parts of maleic anhydride, 5-12 parts of ethylene glycol, 3-5 parts of palm oil residue, 0.2-0.3 part of catalytic enzyme, 1-2 parts of cross-linked hydroxyethyl cellulose grafted acrylamide polymer, 1-2 parts of sodium polyacrylate, 0.5-1 part of sodium carbonate, 1-2 parts of sodium silicate, 0.5-1 part of citric acid and 1-2 parts of sodium benzoate.
Further, the natural latex comprises the following components in parts by weight: 30-40 parts of fresh latex, 14-18 parts of maleic anhydride, 8-10 parts of ethylene glycol, 3.6-4.3 parts of palm oil residue, 0.26 part of catalytic enzyme, 1.6 parts of cross-linked hydroxyethyl cellulose grafted acrylamide polymer, 1.2 parts of sodium polyacrylate, 0.8 part of sodium carbonate, 1.7 parts of sodium silicate, 0.9 part of citric acid and 1.1 part of sodium benzoate.
Further, the natural latex comprises the following components in parts by weight: 37 parts of fresh latex, 15 parts of maleic anhydride, 8.8 parts of ethylene glycol, 4.1 parts of palm oil residue, 0.26 part of catalytic enzyme, 1.6 parts of cross-linked hydroxyethyl cellulose grafted acrylamide polymer, 1.2 parts of sodium polyacrylate, 0.8 part of sodium carbonate, 1.7 parts of sodium silicate, 0.9 part of citric acid and 1.1 parts of sodium benzoate.
Further, filtering the fresh latex, removing impurities, adding weak base salt, clarifying and settling for 12-36 hours, and controlling the alkalinity of the fresh latex to be 0.06% -0.1%; then adding maleic anhydride, ethylene glycol, palm oil residue and catalytic enzyme into the fresh latex, stirring, and standing for 4-8 h; the cross-linked hydroxyethyl cellulose grafted acrylamide polymer, sodium polyacrylate, sodium carbonate, sodium silicate, citric acid and sodium benzoate are mixed and then added into the fresh latex, and the green environment-friendly natural latex is formed after 12-18 h.
Further, the clarified and settled fresh latex is placed in a sealing tank, added with maleic anhydride, ethylene glycol, palm oil residue and catalytic enzyme, stirred and sealed, and the temperature is controlled at 20-30 ℃.
Further, the cross-linked hydroxyethyl cellulose grafted acrylamide polymer, sodium polyacrylate, sodium carbonate, sodium silicate, citric acid and sodium benzoate are mixed and added into fresh latex, and the fresh latex is sealed and stored, and the temperature is controlled at 22-28 ℃.
The invention also provides a green environment-friendly natural latex and an ammonia-free preservation method thereof, wherein the cassia seed, the garden balsam stem and the peach leaf extract are mixed and then added into the purified water for mixing and stirring, the temperature is 70-90 ℃, the treatment is carried out for 2-3 hours, after the residue is filtered, bamboo charcoal particles are added into the filtrate to form an ammonia-free preservation system, and the natural latex is preserved into the ammonia-free preservation system.
Further, the ammonia-free preservation system is added into the ammonia-free preservation device, the natural latex is divided into a plurality of parts by the ammonia-free preservation device, and the ammonia-free preservation system circulates among the parts.
Further, the ammonia-free preservation device comprises a storage barrel; the latex storage cavity is not arranged on the storage barrel, and the bottom of the storage barrel is provided with a circulating cavity; the circulation cavity is connected with the latex storage cavity through a plurality of drainage tubes; the drainage tube is connected with the micro circulating pump through a hose; the drainage tube be bilayer structure, outer structure's lateral wall is provided with the backward flow hole, outer structure's inside wall is provided with the filter screen.
The invention has the beneficial effects that:
the environment-friendly natural latex disclosed by the invention is free of ammonia, so that downstream manufacturers can avoid a deamination process, the emission of waste water and waste gas is reduced, and the overall production cost is reduced.
The preparation process of the environment-friendly natural latex without ammonia is environment-friendly, and the production environment is improved.
The latex storage adopts an ammonia-free storage system, has no stimulation, health and toxicity, has no toxic or side effect on human bodies, is more suitable for the requirements of bedding articles, mother and infant articles and other products, and overcomes the defect of easy caking during latex storage by arranging the ammonia-free storage device.
Detailed Description
The technical solution of the present invention will be clearly and completely described by the following detailed description.
Example 1
The green environment-friendly natural latex comprises the following components in parts by weight: 20 parts of fresh latex, 10 parts of maleic anhydride, 5 parts of ethylene glycol, 3 parts of palm oil residue, 0.2 part of catalytic enzyme, 1 part of cross-linked hydroxyethyl cellulose grafted acrylamide polymer, 1 part of sodium polyacrylate, 0.5 part of sodium carbonate, 1 part of sodium silicate, 0.5 part of citric acid and 1 part of sodium benzoate.
Filtering fresh latex, removing impurities, adding weak base salt, clarifying and settling for 12 hours, and controlling the alkalinity of the fresh latex to be 0.06%; then adding maleic anhydride, ethylene glycol, palm oil residue and catalytic enzyme into the fresh latex, stirring, and standing for 4 h; the cross-linked hydroxyethyl cellulose grafted acrylamide polymer, sodium polyacrylate, sodium carbonate, sodium silicate, citric acid and sodium benzoate are mixed and then added into the fresh latex, and the green environment-friendly natural latex is formed after 12 hours.
And (3) placing the clarified and settled fresh latex into a sealing tank, adding maleic anhydride, ethylene glycol, palm oil residue and catalytic enzyme, stirring, and sealing, wherein the temperature is controlled at 20 ℃.
Mixing the cross-linked hydroxyethyl cellulose grafted acrylamide polymer, sodium polyacrylate, sodium carbonate, sodium silicate, citric acid and sodium benzoate, adding into fresh latex, sealing and storing, and controlling the temperature at 22 ℃.
Example 2
The green environment-friendly natural latex comprises the following components in parts by weight: 50 parts of fresh latex, 20 parts of maleic anhydride, 12 parts of ethylene glycol, 5 parts of palm oil residue, 0.3 part of catalytic enzyme, 2 parts of cross-linked hydroxyethyl cellulose grafted acrylamide polymer, 2 parts of sodium polyacrylate, 1 part of sodium carbonate, 2 parts of sodium silicate, 1 part of citric acid and 2 parts of sodium benzoate.
Filtering fresh latex, removing impurities, adding weak base salt, clarifying and settling for 36 hours, and controlling the alkalinity of the fresh latex to be 0.1%; then adding maleic anhydride, ethylene glycol, palm oil residue and catalytic enzyme into the fresh latex, stirring, and standing for 4-8 h; the cross-linked hydroxyethyl cellulose grafted acrylamide polymer, sodium polyacrylate, sodium carbonate, sodium silicate, citric acid and sodium benzoate are mixed and then added into the fresh latex, and the green environment-friendly natural latex is formed after 18 hours.
And (3) placing the clarified and settled fresh latex into a sealing tank, adding maleic anhydride, ethylene glycol, palm oil residue and catalytic enzyme, stirring, and sealing, wherein the temperature is controlled at 30 ℃.
Mixing the cross-linked hydroxyethyl cellulose grafted acrylamide polymer, sodium polyacrylate, sodium carbonate, sodium silicate, citric acid and sodium benzoate, adding into fresh latex, sealing and storing, and controlling the temperature at 28 ℃.
Example 3
The green environment-friendly natural latex comprises the following components in parts by weight: 30-40 parts of fresh latex, 14-18 parts of maleic anhydride, 8-10 parts of ethylene glycol, 3.6-4.3 parts of palm oil residue, 0.26 part of catalytic enzyme, 1.6 parts of cross-linked hydroxyethyl cellulose grafted acrylamide polymer, 1.2 parts of sodium polyacrylate, 0.8 part of sodium carbonate, 1.7 parts of sodium silicate, 0.9 part of citric acid and 1.1 part of sodium benzoate.
Filtering fresh latex, removing impurities, adding weak base salt, clarifying and settling for 12-36 hours, and controlling the alkalinity of the fresh latex to be 0.06% -0.1%; then adding maleic anhydride, ethylene glycol, palm oil residue and catalytic enzyme into the fresh latex, stirring, and standing for 4-8 h; the cross-linked hydroxyethyl cellulose grafted acrylamide polymer, sodium polyacrylate, sodium carbonate, sodium silicate, citric acid and sodium benzoate are mixed and then added into the fresh latex, and the green environment-friendly natural latex is formed after 12-18 h.
And (3) placing the clarified and settled fresh latex into a sealing tank, adding maleic anhydride, ethylene glycol, palm oil residue and catalytic enzyme, stirring, and sealing, wherein the temperature is controlled at 25 ℃.
Mixing the cross-linked hydroxyethyl cellulose grafted acrylamide polymer, sodium polyacrylate, sodium carbonate, sodium silicate, citric acid and sodium benzoate, adding into fresh latex, sealing and storing, and controlling the temperature at 23 ℃.
Example 4
The green environment-friendly natural latex comprises the following components in parts by weight: 37 parts of fresh latex, 15 parts of maleic anhydride, 8.8 parts of ethylene glycol, 4.1 parts of palm oil residue, 0.26 part of catalytic enzyme, 1.6 parts of cross-linked hydroxyethyl cellulose grafted acrylamide polymer, 1.2 parts of sodium polyacrylate, 0.8 part of sodium carbonate, 1.7 parts of sodium silicate, 0.9 part of citric acid and 1.1 parts of sodium benzoate.
Filtering fresh latex, removing impurities, adding weak base salt, clarifying and settling for 12-36 hours, and controlling the alkalinity of the fresh latex to be 0.06% -0.1%; then adding maleic anhydride, ethylene glycol, palm oil residue and catalytic enzyme into the fresh latex, stirring, and standing for 6 hours; the cross-linked hydroxyethyl cellulose grafted acrylamide polymer, sodium polyacrylate, sodium carbonate, sodium silicate, citric acid and sodium benzoate are mixed and then added into the fresh latex, and the green environment-friendly natural latex is formed after 15 hours.
And (3) placing the clarified and settled fresh latex into a sealing tank, adding maleic anhydride, ethylene glycol, palm oil residue and catalytic enzyme, stirring, and sealing, wherein the temperature is controlled at 22 ℃.
Mixing the cross-linked hydroxyethyl cellulose grafted acrylamide polymer, sodium polyacrylate, sodium carbonate, sodium silicate, citric acid and sodium benzoate, adding into fresh latex, sealing and storing, and controlling the temperature at 22 ℃.
Example 5
Mixing semen Cassiae, herba Speranskiae Tuberculatae and folium Persicae extract, adding into purified water, mixing and stirring at 70-90 deg.C, processing for 2-3 hr, filtering the residue, adding bamboo charcoal particles into the filtrate to form ammonia-free storage system, and storing natural latex in the ammonia-free storage system. The ammonia-free preservation system is added into the ammonia-free preservation device, the natural latex is divided into a plurality of parts by the ammonia-free preservation device, and the ammonia-free preservation system circulates among the parts. The ammonia-free preservation device comprises a storage barrel; the latex storage cavity is not arranged on the storage barrel, and the bottom of the storage barrel is provided with a circulating cavity; the circulation cavity is connected with the latex storage cavity through a plurality of drainage tubes; the drainage tube is connected with the micro circulating pump through a hose; the drainage tube be bilayer structure, outer structure's lateral wall is provided with the backward flow hole, outer structure's inside wall is provided with the filter screen.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention.
Claims (9)
1. A green environmental-protection natural latex is characterized in that: the natural latex comprises the following components in parts by weight: 20-50 parts of fresh latex, 10-20 parts of maleic anhydride, 5-12 parts of ethylene glycol, 3-5 parts of palm oil residue, 0.2-0.3 part of catalytic enzyme, 1-2 parts of cross-linked hydroxyethyl cellulose grafted acrylamide polymer, 1-2 parts of sodium polyacrylate, 0.5-1 part of sodium carbonate, 1-2 parts of sodium silicate, 0.5-1 part of citric acid and 1-2 parts of sodium benzoate.
2. The green environmental-friendly natural latex according to claim 1, wherein: the natural latex comprises the following components in parts by weight: 30-40 parts of fresh latex, 14-18 parts of maleic anhydride, 8-10 parts of ethylene glycol, 3.6-4.3 parts of palm oil residue, 0.26 part of catalytic enzyme, 1.6 parts of cross-linked hydroxyethyl cellulose grafted acrylamide polymer, 1.2 parts of sodium polyacrylate, 0.8 part of sodium carbonate, 1.7 parts of sodium silicate, 0.9 part of citric acid and 1.1 part of sodium benzoate.
3. The green environmental-friendly natural latex according to claim 2, wherein: the natural latex comprises the following components in parts by weight: 37 parts of fresh latex, 15 parts of maleic anhydride, 8.8 parts of ethylene glycol, 4.1 parts of palm oil residue, 0.26 part of catalytic enzyme, 1.6 parts of cross-linked hydroxyethyl cellulose grafted acrylamide polymer, 1.2 parts of sodium polyacrylate, 0.8 part of sodium carbonate, 1.7 parts of sodium silicate, 0.9 part of citric acid and 1.1 parts of sodium benzoate.
4. The green environmental-friendly natural latex according to claim 1, wherein: filtering the fresh latex, removing impurities, adding weak base salt, clarifying and settling for 12-36 hours, and controlling the alkalinity of the fresh latex to be 0.06% -0.1%; then adding maleic anhydride, ethylene glycol, palm oil residue and catalytic enzyme into the fresh latex, stirring, and standing for 4-8 h; the cross-linked hydroxyethyl cellulose grafted acrylamide polymer, sodium polyacrylate, sodium carbonate, sodium silicate, citric acid and sodium benzoate are mixed and then added into the fresh latex, and the green environment-friendly natural latex is formed after 12-18 h.
5. The green environmental-friendly natural latex according to claim 4, wherein: and (3) placing the clarified and settled fresh latex into a sealing tank, adding maleic anhydride, ethylene glycol, palm oil residue and catalytic enzyme, stirring, and sealing, wherein the temperature is controlled at 20-30 ℃.
6. The green environmental-friendly natural latex according to claim 4, wherein: mixing the cross-linked hydroxyethyl cellulose grafted acrylamide polymer, sodium polyacrylate, sodium carbonate, sodium silicate, citric acid and sodium benzoate, adding into fresh latex, sealing and storing, and controlling the temperature at 22-28 ℃.
7. The ammonia-free preservation method of green environmental-friendly natural latex according to claim 1, characterized in that: mixing semen Cassiae, herba Speranskiae Tuberculatae and folium Persicae extract, adding into purified water, mixing and stirring at 70-90 deg.C, processing for 2-3 hr, filtering the residue, adding bamboo charcoal particles into the filtrate to form ammonia-free storage system, and storing natural latex in the ammonia-free storage system.
8. The ammonia-free preservation method of green environmental-friendly natural latex according to claim 7, wherein: the ammonia-free preservation system is added into the ammonia-free preservation device, the ammonia-free preservation device divides the natural latex into a plurality of parts, and the ammonia-free preservation system circulates among the parts.
9. The ammonia-free preservation method of green environmental-friendly natural latex according to claim 8, wherein: the ammonia-free preservation device comprises a storage barrel; the latex storage cavity is not arranged on the storage barrel, and the bottom of the storage barrel is provided with a circulating cavity; the circulation cavity is connected with the latex storage cavity through a plurality of drainage tubes; the drainage tube is connected with the micro circulating pump through a hose; the drainage tube be bilayer structure, outer structure's lateral wall is provided with the backward flow hole, outer structure's inside wall is provided with the filter screen.
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| US5773499A (en) * | 1996-03-25 | 1998-06-30 | Schill & Seilacher (Gmbh & Co.) | Preserved and stabilized natural latex, with water-soluble carboxylic acid salts |
| JP2006056930A (en) * | 2004-08-17 | 2006-03-02 | Regitex Co Ltd | Natural rubber latex |
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| CN110358157A (en) * | 2019-08-14 | 2019-10-22 | 海南天然橡胶产业集团金橡有限公司 | A kind of anti-condensation antistaling agent of natural rubber cream and its preservation method |
| CN110577610A (en) * | 2019-07-25 | 2019-12-17 | 海南天然橡胶产业集团金橡有限公司金水橡胶加工分公司 | Ultralow-ammonia concentrated natural latex and preparation method thereof |
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- 2020-08-17 CN CN202010824256.XA patent/CN112011101A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5773499A (en) * | 1996-03-25 | 1998-06-30 | Schill & Seilacher (Gmbh & Co.) | Preserved and stabilized natural latex, with water-soluble carboxylic acid salts |
| JP2006056930A (en) * | 2004-08-17 | 2006-03-02 | Regitex Co Ltd | Natural rubber latex |
| CN102358789A (en) * | 2011-08-09 | 2012-02-22 | 北京天一瑞博生物科技有限公司 | Natural rubber latex anticoagulating and antistaling agent and preservation method thereof |
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| CN109369826A (en) * | 2018-09-21 | 2019-02-22 | 昌江金达乳胶制品有限公司 | Production method of ammonia-free natural concentrated latex |
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