CN106800906B - Biodegradable polypropylene carbonate hot melt adhesive and preparation method thereof - Google Patents
Biodegradable polypropylene carbonate hot melt adhesive and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J169/00—Adhesives based on polycarbonates; Adhesives based on derivatives of polycarbonates
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
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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
- C08L2201/00—Properties
- C08L2201/06—Biodegradable
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- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
A biodegradable polypropylene carbonate hot melt adhesive and a preparation method thereof belong to the technical field of biodegradable high polymer materials. Solves the problem of how to provide the hot melt adhesive with biodegradability, good stability, good bonding strength and low use temperature. The hot melt adhesive of the invention comprises: 100 parts of polypropylene carbonate, 3-30 parts of biodegradable plasticizer, 5-30 parts of tackifying resin, 0.3-0.6 part of heat stabilizer and 0-0.6 part of antioxidant. The hot melt adhesive has biodegradability, can be used at the temperature of 100-120 ℃ when the number average molecular weight of polypropylene carbonate is less than or equal to 50000, reduces the use temperature by 40-60 ℃ compared with the prior hot melt adhesive, reduces energy consumption, improves production efficiency, ensures higher thermal stability and more stable viscosity of the hot melt adhesive, ensures bonding strength, and can be applied to bonding of paper, paperboard, foam and wood board products.
Description
Technical Field
The invention relates to a biodegradable polypropylene carbonate hot melt adhesive and a preparation method thereof, belonging to the technical field of biodegradable high polymer materials.
Background
The carbon dioxide is used as a raw material to produce the degradable polymer material, and has great significance for effectively utilizing resources, creating material wealth, relieving energy crisis and reducing greenhouse effect. Polypropylene carbonate (also known as carbon dioxide copolymer or polypropylene carbonate, abbreviated as PPC in english) is a novel completely biodegradable aliphatic polycarbonate derived from inexpensive and readily available propylene oxide and carbon dioxide. The polypropylene carbonate has excellent biodegradability and biocompatibility, good gas barrier property, transparency and the like, thereby showing good application prospect. However, polypropylene carbonate is an amorphous polymer with a glass transition temperature slightly higher than room temperature, which makes it have a lower glass transition temperature for use as a plastic and a higher glass transition temperature for use as a rubber. Therefore, the development of suitable application fields is required to promote the development of polypropylene carbonate.
The hot melt adhesive is a large variety with the most development potential in the adhesive industry, enjoys the name of a green adhesive due to the advantages of no toxicity, no environmental pollution, convenient preparation and the like, becomes the direction of the market development of the adhesive, has the annual output in the world always in the rising trend, has the highest growth speed among various adhesives, is more and more diversified in variety and is more and more widely applied. However, most hot melt adhesives cannot be degraded or hydrolyzed by microorganisms in the environment at present, and the long-term retention of the hot melt adhesives in the environment becomes a hidden danger and threat of the modern society. With the enhancement of the environmental awareness of human beings, the biodegradable hot melt adhesive has a huge potential market.
In recent years, biodegradable hot melt adhesives have come into existence, and the requirements for biodegradable hot melt adhesives are more urgent particularly for packaging materials such as paper and disposable sanitary ware. The hot melt adhesive is prepared by mainly using polyester polymers such as polylactic acid (PLA), Polycaprolactone (PCL), polyesteramide, poly (3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) and the like, natural high molecular compounds and the like as matrix resins and adding proper tackifier, plasticizer, antioxidant, filler and the like, wherein the matrix has biodegradability and is concerned by the adhesive industry and related fields in the world. The most studied biodegradable hot melt adhesives at present are PLA hot melt adhesives. For example, Garry J Edgington et al invented PLA hot melt adhesive formula, which comprises the following components: 10-90% of PLA with the molecular weight less than 20000, 10-50% of thermoplastic polyurethane or thermoplastic PHBV containing 5-35% of hydroxyvaleric acid, 0-5% of degradable ester plasticizer and 0-5% of stabilizer. The hot melt adhesive has wide application, and is especially one kind of biodegradable material for disposable package. The hot melt adhesive is prepared by adding PCL into the polycondensation PLA by Lewis. M. Viljanmaa, A prepares poly L-lactic acid (PLLA)/PCL hot melt adhesive with the molar ratio of 81:19, and researches the adhesive property and stability of the hot melt adhesive in the use of packaging materials. Mikael melt studied the adhesion and thermal stability of PLA and PCL blend hot melt adhesives. The biodegradable PLA hot melt adhesive prepared by the poplar name through a chain extension method is excellent in performance and high in lap joint shear strength. In addition to PLA hot melt adhesives, Grigat Ernst discloses a polyesteramide hot melt adhesive which is prepared by polycondensing ethylene glycol/butanediol and ethylene glycol into low molecular weight polyester, reacting with 1, 6-hexamethylene diisocyanate to synthesize polyesteramide, and then compounding with a proper amount of plasticizer and flame retardant to synthesize the completely biodegradable hot melt adhesive for bonding leather and paper. The Timmermann Ralf is polymerized by 30 to 70 percent of copolymerized polyester of aliphatic diol and dicarboxylic acid and 70 to 30 percent of amide diol to synthesize polyesteramide, and the biodegradable hot melt adhesive is obtained. Kauffman Thomas and the like invent a biodegradable hot melt adhesive, which is synthesized by 20-90% of 3-hydroxybutyric acid and 9-35% of 3-hydroxyvaleric acid, 10-80% of polar tackifier, 0-50% of plasticizer, 0-30% of paraffin and 0-3% of stabilizer, and the synthesized hot melt adhesive not only can be completely biodegradable, but also provides a way for relieving the current petroleum crisis.
The biodegradable hot melt adhesive is an adhesive with great development prospect, but has the defects of poor stability, low bonding strength and the like in use at present. And no report on polypropylene carbonate hot melt adhesive is found in the prior art.
Disclosure of Invention
The invention aims to solve the problems of providing a polypropylene carbonate hot melt adhesive with biodegradability, good stability, good bonding strength and low use temperature and a preparation method thereof aiming at the defects of the prior hot melt adhesive technology.
The invention discloses a biodegradable polypropylene carbonate hot melt adhesive, which comprises the following components:
the number average molecular weight of the polypropylene carbonate is less than or equal to 200000.
Preferably, the biodegradable plasticizer is one or a mixture of more of poly 1, 2-propylene glycol adipate, poly 1, 2-propylene glycol succinate, poly diethylene glycol adipate copolyester and citrate in any proportion.
Preferably, the number average molecular weight of the poly (1, 2-propylene glycol adipate) is 2000-3000, the number average molecular weight of the poly (1, 2-propylene glycol succinate) is 3000-4000, and the number average molecular weight of the poly (diethylene glycol adipate) copolyester is 2000-10000.
Preferably, the citrate ester is acetyl tributyl citrate.
Preferably, the tackifying resin is one or a mixture of rosin resin, hydrogenated rosin resin and disproportionated rosin resin in any proportion.
Preferably, the heat stabilizer is maleic anhydride or succinic anhydride; the antioxidant is CHINOX 1010 or CHINOX 1076.
Preferably, the weight ratio of the polypropylene carbonate, the biodegradable plasticizer, the tackifying resin, the heat stabilizer and the antioxidant is 100 (5-25): 5-20):0.6: 0.6.
The invention also provides a preparation method of the biodegradable polypropylene carbonate hot melt adhesive, which comprises the steps of melting, blending and cooling the polypropylene carbonate, the biodegradable plasticizer, the tackifying resin, the heat stabilizer and the antioxidant according to the proportion to obtain the biodegradable polypropylene carbonate hot melt adhesive.
Preferably, the biodegradable polypropylene carbonate hot melt adhesive is prepared by mechanically mixing polypropylene carbonate, a biodegradable plasticizer, tackifying resin, a heat stabilizer and an antioxidant according to the proportion, adding the mixture into an internal mixer after uniform mixing, mixing for 8-30min at the temperature of 160-175 ℃ and at the speed of 40-60 r/min, and cooling.
Preferably, the polypropylene carbonate, the biodegradable plasticizer and the tackifying resin are mechanically mixed according to the proportion, and are added into an internal mixer after being uniformly mixed, and are mixed for 8-30min at the temperature of 160-175 ℃ and under the condition of 40-60 r/min; and then adding a heat stabilizer and an antioxidant according to the proportion, blending for 3-6min, and cooling to obtain the biodegradable polypropylene carbonate hot melt adhesive.
Preferably, the biodegradable polypropylene carbonate hot melt adhesive is prepared by mechanically mixing polypropylene carbonate, tackifying resin, heat stabilizer and antioxidant according to a ratio, uniformly mixing, adding into a double-screw extruder, feeding biodegradable plasticizer by using a peristaltic pump, blending, extruding and granulating;
the set temperature of the double-screw extruder is as follows: a first area: 115 ℃ and 125 ℃, and a second zone: 140 ℃ and 150 ℃, and a three-zone: 150-: 160 ℃ and 170 ℃, and five zones: 160 ℃ and 170 ℃, and six zones: 155 ℃ and 165 ℃, and a seventh zone: 150 ℃ and 160 ℃, eight zones: 145-: 140 ℃ and 150 ℃, screw rotation speed: 100-;
the feed rate of the peristaltic pump is 0.75 kg/h to 1.70 kg/h.
Compared with the prior art, the invention has the beneficial effects that:
the biodegradable polypropylene carbonate hot melt adhesive has biodegradable environmental protection performance, can be degraded in the environment after being used, does not bring hidden danger to the environment, can reduce the dependence of high polymer materials on petroleum resources, and provides a way for relieving the current petroleum crisis;
when the number average molecular weight of the polypropylene carbonate is less than or equal to 50000, the biodegradable polypropylene carbonate hot melt adhesive can be used at the temperature of 100-120 ℃, and the use temperature is reduced by 40-60 ℃ compared with the use temperature of the existing hot melt adhesive, so that the energy consumption is reduced, the production efficiency is improved, the thermal stability of the hot melt adhesive is higher, the viscosity is more stable, the bonding strength is ensured, the energy-saving production is facilitated, and the environment is more green;
the biodegradable polypropylene carbonate hot melt adhesive can have different colors according to different tackifying resins, has yellow, light yellow, milky white and the like, and has better transparency;
the biodegradable polypropylene carbonate hot melt adhesive can be made into various shapes and can be used for bonding paper, paperboard, foam and wood board products.
The invention also provides a preparation method of the biodegradable polypropylene carbonate hot melt adhesive, a melt blending mode is adopted, a solvent is not needed in the production process, no waste is generated, and the environment-friendly chemical process is met.
Drawings
FIG. 1 is a diagram showing the adhesion effect of the hot melt adhesive of example 2.
Detailed Description
For a further understanding of the invention, reference will now be made to the preferred embodiments of the invention in conjunction with the detailed description, but it is to be understood that the description is intended to further illustrate the features and advantages of the invention and not to limit the scope of the claims.
The invention discloses a biodegradable polypropylene carbonate hot melt adhesive, which comprises the following components: 100 parts by weight of polypropylene carbonate, 3-30 parts by weight of biodegradable plasticizer, 5-30 parts by weight of tackifying resin, 0.3-0.6 part by weight of heat stabilizer and 0-0.6 part by weight of antioxidant;
wherein the number average molecular weight of the polypropylene carbonate is 200000 or less, preferably 25000-150000, more preferably 25000-100000; the biodegradable plasticizer is one or more of poly (1, 2-propylene glycol adipate), poly (1, 2-propylene glycol succinate), poly (diethylene glycol adipate) copolyester and citric acid ester; the number average molecular weight of the poly adipic acid 1, 2-propylene glycol ester is 2000-3000, the number average molecular weight of the poly succinic acid 1, 2-propylene glycol ester is 3000-4000, and the number average molecular weight of the poly adipic acid diethylene glycol copolyester is 2000-10000; the citrate is acetyl tributyl citrate; the tackifying resin is one or a mixture of rosin resin, hydrogenated rosin resin and disproportionated rosin resin; the heat stabilizer is maleic anhydride or succinic anhydride; the antioxidant is CHINOX 1010 or CHINOX 1076; the weight ratio of the polypropylene carbonate, the biodegradable plasticizer, the tackifying resin, the heat stabilizer and the antioxidant is 100 (5-25) to (5-20) to 0.6.
The preparation method of the biodegradable polypropylene carbonate hot melt adhesive comprises the steps of melting and blending polypropylene carbonate, a biodegradable plasticizer, tackifying resin, a heat stabilizer and an antioxidant according to a ratio, cooling the mixture at room temperature in the air state, and cutting the mixture into small blocks to obtain the biodegradable polypropylene carbonate hot melt adhesive.
It should be noted that the biodegradable polypropylene carbonate hot melt adhesive of the present invention can be prepared by the melt blending method commonly used by those skilled in the art in the prior art, and is not particularly limited. The present embodiment provides four methods for preparing biodegradable poly (trimethylene carbonate) hot melt adhesives:
mechanically mixing polypropylene carbonate, a biodegradable plasticizer, tackifying resin, a heat stabilizer and an antioxidant according to a ratio, adding the mixture into an internal mixer after uniform mixing, mixing for 8-30min at the temperature of 160-175 ℃ and at the speed of 40-60 r/min, cooling in the air state at room temperature, and cutting into small blocks to obtain the biodegradable polypropylene carbonate hot melt adhesive.
The method is simple to operate and relatively uniform in mixing;
mechanically mixing the polypropylene carbonate, the biodegradable plasticizer and the tackifying resin according to the proportion, adding the mixture into an internal mixer after uniform mixing, and mixing for 8-30min at the temperature of 160-175 ℃ and under the condition of 40-60 r/min; and adding a heat stabilizer and an antioxidant according to a ratio, blending for 3-6min, cooling at room temperature in the air, and cutting into small pieces to obtain the biodegradable polypropylene carbonate hot melt adhesive.
The raw materials are added into the internal mixer in two batches, the first batch of raw materials are added, and because the heat stabilizer and the antioxidant are not added, the polypropylene carbonate is subjected to partial thermal degradation, the molecular weight is reduced (the viscosity of the high molecular weight polypropylene carbonate is higher, a large amount of plasticizer needs to be added, the plasticizer is too large in amount and can easily migrate out of the surface, the use of the obtained hot melt adhesive is influenced), the viscosity is reduced, the fluidity of the hot melt adhesive is increased, a series of side reactions caused by the heat stabilizer are avoided simultaneously, the end capping effect is better, and the thermal stability of the hot melt adhesive is higher.
Mechanically mixing the polypropylene carbonate, the tackifying resin, the heat stabilizer and the antioxidant according to the proportion, adding the mixture into a double-screw extruder after uniform mixing, feeding the biodegradable plasticizer by using a peristaltic pump, and performing blending extrusion granulation to obtain the biodegradable polypropylene carbonate hot melt adhesive;
the set temperature of the twin-screw extruder is as follows: a first area: 115 ℃ and 125 ℃, and a second zone: 140 ℃ and 150 ℃, and a three-zone: 150-: 160 ℃ and 170 ℃, and five zones: 160 ℃ and 170 ℃, and six zones: 155 ℃ and 165 ℃, and a seventh zone: 150 ℃ and 160 ℃, eight zones: 145-: 140 ℃ and 150 ℃, screw rotation speed: 100-;
the feed rate of the peristaltic pump is 0.75 kg/h to 1.70 kg/h.
The method can be used for mass production, and hot melt adhesives with different shapes can be obtained by replacing the die head.
And fourthly, adding the polypropylene carbonate, the biodegradable plasticizer, the tackifying resin, the heat stabilizer and the antioxidant into a container according to the proportion, mixing for 8-30min at the temperature of 160-175 ℃ under stirring, cooling in the air state at room temperature, and cutting into small blocks to obtain the biodegradable polypropylene carbonate hot melt adhesive.
The present invention is further illustrated by the following examples.
Example 1
The biodegradable polypropylene carbonate hot melt adhesive consists of the following components:
the preparation method of the biodegradable polypropylene carbonate hot melt adhesive comprises the following steps: mechanically mixing the polypropylene carbonate, 1, 2-propylene glycol adipate, acetyl tributyl citrate, rosin resin, maleic anhydride and antioxidant CHINOX 1010, uniformly mixing, adding into an internal mixer, blending for 15min at the temperature of 170 ℃ and 50 rpm until the mixture is completely melted, uniformly mixing, directly cooling the mixed sample at room temperature in the air state, and cutting into small blocks to obtain the biodegradable polypropylene carbonate hot melt adhesive.
Example 2
The biodegradable polypropylene carbonate hot melt adhesive consists of the following components:
the preparation method of the biodegradable polypropylene carbonate hot melt adhesive comprises the following steps: mechanically mixing the polypropylene carbonate, 1, 2-propylene glycol adipate, acetyl tributyl citrate, rosin resin, maleic anhydride and antioxidant CHINOX 1010, uniformly mixing, adding into an internal mixer, blending for 10min at the temperature of 170 ℃ and 50 rpm until the mixture is completely melted, uniformly mixing, directly cooling the mixed sample at room temperature in the air state, and cutting into small blocks to obtain the biodegradable polypropylene carbonate hot melt adhesive.
The hot melt adhesive of example 2 was made into a sheet, the hot stage was heated to 160 ℃, the adherend was placed on the hot stage, the sheet-like hot melt adhesive was laid flat on the adherend, another layer of the adherend was laid, after the hot melt adhesive was melted, the adherend was pressed to be tightly bonded, and finally the adhesion was completed. As shown in figure 1, the hot melt adhesive has good bonding strength and can not be separated even if being pulled by force.
Example 3
The biodegradable polypropylene carbonate hot melt adhesive consists of the following components:
the preparation method of the biodegradable polypropylene carbonate hot melt adhesive comprises the following steps: the polypropylene carbonate, the 1, 2-propylene glycol adipate, the rosin resin, the maleic anhydride and the antioxidant CHINOX 1010 are firstly mechanically mixed, the mixture is added into an internal mixer after being uniformly mixed, the mixture is blended for 15min at the temperature of 170 ℃ and 50 r/min until the mixture is completely melted, the mixture is uniformly mixed, a mixed sample is directly cooled in the air state at room temperature, and the sample is cut into small blocks, so that the biodegradable polypropylene carbonate hot melt adhesive is obtained.
Example 4
The biodegradable polypropylene carbonate hot melt adhesive consists of the following components:
the preparation method of the biodegradable polypropylene carbonate hot melt adhesive comprises the following steps: mechanically mixing the polypropylene carbonate, the 1, 2-propylene glycol adipate and the hydrogenated rosin resin for 3min, adding the mixed materials into an internal mixer, and mixing for 25min at the temperature of 170 ℃ and at the speed of 50 r/min; and adding succinic anhydride and an antioxidant CHINOX 1010, blending for 6min, directly cooling the mixed sample at room temperature in the air state, and cutting into small pieces to obtain the biodegradable polypropylene carbonate hot melt adhesive.
The hot melt adhesive of example 4 was tested for peel strength using GB/T2790, which was tested for flexibility versus stiffness of 180 ℃ and peel strength of 30N/25 mm.
Example 5
The biodegradable polypropylene carbonate hot melt adhesive consists of the following components:
the preparation method of the biodegradable polypropylene carbonate hot melt adhesive comprises the following steps: mechanically mixing the polypropylene carbonate, the 1, 2-propylene glycol adipate and the hydrogenated rosin resin for 3min, adding the mixed materials into an internal mixer, and mixing for 8min at 165 ℃ and 50 r/min; and adding succinic anhydride and an antioxidant CHINOX 1010, blending for 3min, directly cooling the mixed sample at room temperature in the air state, and cutting into small pieces to obtain the biodegradable polypropylene carbonate hot melt adhesive.
The hot melt adhesive of example 5 was tested for peel strength using GB/T2790, which was tested for flexibility versus stiffness of 180 ℃ and peel strength of 26N/25 mm.
Example 6
The biodegradable polypropylene carbonate hot melt adhesive consists of the following components:
the preparation method of the biodegradable polypropylene carbonate hot melt adhesive comprises the following steps: mechanically mixing polypropylene carbonate, rosin resin, maleic anhydride and an antioxidant CHINOX 1010 according to a ratio, adding the mixture into a double-screw extruder, feeding a biodegradable plasticizer namely poly (1, 2-propylene glycol adipate) by using a peristaltic pump, blending, extruding and granulating to obtain the biodegradable polypropylene carbonate hot melt adhesive, wherein the conditions of extrusion granulation are as follows: the set temperature of the twin-screw extruder is as follows: a first area: 120 ℃, zone two: 145 ℃, three zones: 160 ℃, four zones: 165 ℃, five zones: 163 ℃, six zones: 160 ℃, seven zones: 155 ℃, eight zones: 150 ℃, head: 140 ℃, screw rotation speed: 150 rpm and a peristaltic pump feed rate of 1.6 kg/h.
The thermal properties of the biodegradable polypropylene carbonate hot melt adhesives of examples 1-6 were examined and the results are shown in Table 1. The detection equipment adopts a softening point tester (HAD-24750 type), the detection method adopts the national people's republic of China standard GB/T4507, and the high temperature viscometer SNB-AI detection method adopts the HGT 3660 standard.
TABLE 1 thermal Properties of the biodegradable Polypropylene carbonate Hot melt Adhesives of examples 1-6
As can be seen from Table 1, the biodegradable polypropylene carbonate hot melt adhesive of the present invention has excellent heat resistance and thermal stability.
Claims (8)
1. Biodegradable polypropylene carbonate hot melt adhesive, characterized by, includes:
the number average molecular weight of the polypropylene carbonate is less than or equal to 200000;
the biodegradable plasticizer is one or a mixture of a plurality of poly (1, 2-propylene glycol adipate), poly (1, 2-propylene glycol succinate), poly (diethylene glycol adipate) copolyester and citric acid ester according to any proportion; the number average molecular weight of the poly adipic acid 1, 2-propylene glycol ester is 2000-3000, the number average molecular weight of the poly succinic acid 1, 2-propylene glycol ester is 3000-4000, and the number average molecular weight of the poly adipic acid diethylene glycol copolyester is 2000-10000;
the tackifying resin is one or a mixture of more of rosin resin, hydrogenated rosin resin and disproportionated rosin resin according to any proportion.
2. The biodegradable polypropylene carbonate hot melt adhesive according to claim 1, wherein the citric acid ester is acetyl tributyl citrate.
3. The biodegradable polypropylene carbonate hot melt adhesive according to claim 1, wherein the heat stabilizer is maleic anhydride or succinic anhydride; the antioxidant is CHINOX 1010 or CHINOX 1076.
4. The biodegradable polypropylene carbonate hot melt adhesive as claimed in claim 1, wherein the weight ratio of the polypropylene carbonate, the biodegradable plasticizer, the tackifying resin, the heat stabilizer and the antioxidant is 100 (5-25): 0.6: 0.6.
5. The preparation method of the biodegradable polypropylene carbonate hot melt adhesive as claimed in any one of claims 1 to 4, wherein the biodegradable polypropylene carbonate hot melt adhesive is obtained by melting and blending polypropylene carbonate, a biodegradable plasticizer, a tackifying resin, a heat stabilizer and an antioxidant according to a proportion and cooling.
6. The preparation method of the biodegradable polypropylene carbonate hot melt adhesive as claimed in claim 5, wherein the biodegradable polypropylene carbonate hot melt adhesive is prepared by mechanically mixing polypropylene carbonate, biodegradable plasticizer, tackifying resin, heat stabilizer and antioxidant according to a ratio, adding the mixture into an internal mixer after uniform mixing, mixing for 8-30min at a temperature of 160-175 ℃ and at a speed of 40-60 r/min, and cooling.
7. The method for preparing the biodegradable polypropylene carbonate hot melt adhesive as claimed in claim 5, wherein the polypropylene carbonate, the biodegradable plasticizer and the tackifying resin are mechanically mixed according to the ratio, and are added into an internal mixer after being uniformly mixed, and are mixed for 8-30min at the temperature of 160-175 ℃ and at the speed of 40-60 r/min; and then adding a heat stabilizer and an antioxidant according to the proportion, blending for 3-6min, and cooling to obtain the biodegradable polypropylene carbonate hot melt adhesive.
8. The preparation method of the biodegradable polypropylene carbonate hot melt adhesive as claimed in any one of claims 1 to 4, wherein the polypropylene carbonate, the tackifying resin, the heat stabilizer and the antioxidant are mechanically mixed according to the proportion, the mixture is added into a double screw extruder after being uniformly mixed, the biodegradable plasticizer is fed by a peristaltic pump, and the mixture is subjected to extrusion granulation to obtain the biodegradable polypropylene carbonate hot melt adhesive;
the set temperature of the double-screw extruder is as follows: a first area: 115 ℃ and 125 ℃, and a second zone: 140 ℃ and 150 ℃, and a three-zone: 150-: 160 ℃ and 170 ℃, and five zones: 160 ℃ and 170 ℃, and six zones: 155 ℃ and 165 ℃, and a seventh zone: 150 ℃ and 160 ℃, eight zones: 145-: 140 ℃ and 150 ℃, screw rotation speed: 100-;
the feed rate of the peristaltic pump is 0.75 kg/h to 1.70 kg/h.
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| CN101722699A (en) * | 2009-11-06 | 2010-06-09 | 东莞市雅居乐日用制品有限公司 | Degradable composite plastic sheet |
| CN103261354A (en) * | 2010-12-28 | 2013-08-21 | Sk新技术株式会社 | Composition of eco-friendly hot melt adhesive |
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| CN101722699A (en) * | 2009-11-06 | 2010-06-09 | 东莞市雅居乐日用制品有限公司 | Degradable composite plastic sheet |
| CN103261354A (en) * | 2010-12-28 | 2013-08-21 | Sk新技术株式会社 | Composition of eco-friendly hot melt adhesive |
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