CN110698992A - Recycling processing technology based on waste PP plastic - Google Patents

Recycling processing technology based on waste PP plastic Download PDF

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Publication number
CN110698992A
CN110698992A CN201910876828.6A CN201910876828A CN110698992A CN 110698992 A CN110698992 A CN 110698992A CN 201910876828 A CN201910876828 A CN 201910876828A CN 110698992 A CN110698992 A CN 110698992A
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plastic
waste
layer
coating
recycling
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Inventor
朱保义
沈岑宽
卢山龙
任永刚
陈华勇
胡磊
吴国庆
王武钧
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Anhui Huabo Renewable Resources Technology Co Ltd
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Anhui Huabo Renewable Resources Technology Co Ltd
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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
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C249/00—Preparation of compounds containing nitrogen atoms doubly-bound to a carbon skeleton
    • C07C249/02—Preparation of compounds containing nitrogen atoms doubly-bound to a carbon skeleton of compounds containing imino groups
    • 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
    • C08F255/00—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00
    • C08F255/02—Macromolecular compounds obtained by polymerising monomers on to polymers of hydrocarbons as defined in group C08F10/00 on to polymers of olefins having two or three carbon atoms
    • 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
    • C08F279/00—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00
    • C08F279/02—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00 on to polymers of conjugated dienes
    • 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
    • C08K3/02—Elements
    • C08K3/04—Carbon
    • 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
    • C08K3/34—Silicon-containing compounds
    • C08K3/36—Silica
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/04—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06N3/10—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds with styrene-butadiene copolymerisation products or other synthetic rubbers or elastomers except polyurethanes
    • D06N3/106—Elastomers
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/66—Sealings
    • 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
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
    • 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
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
    • C09J2301/302—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
    • 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
    • C09J2400/00—Presence of inorganic and organic materials
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2209/00—Properties of the materials
    • D06N2209/14—Properties of the materials having chemical properties
    • D06N2209/142—Hydrophobic
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2213/00—Others characteristics
    • D06N2213/02—All layers being of the same kind of material, e.g. all layers being of polyolefins, all layers being of polyesters

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)

Abstract

The invention discloses a recycling and processing technology based on waste PP plastic, which comprises the following specific processing processes: adding the waste PP plastic into a grinder for grinding and granulating; simultaneously adding PP plastic master batch and butadiene rubber into a plasticator, adding antioxidant cross-linking agent and sodium persulfate after melt plastication, adding plasticizer, nano silicon dioxide, quartz powder and carbon black after plastication, continuously mixing and discharging rubber; and melting the sizing material, coating the sizing material on the upper surface and the lower surface of the asbestos cloth, cooling and solidifying to obtain a waterproof sheet layer, coating a layer of pressure-sensitive adhesive on the bottom surface of the waterproof sheet layer, and adhering a layer of isolation paper through the pressure-sensitive adhesive to obtain the waterproof coiled material. The waterproof coiled material prepared by the invention has the performance of PP plastic and the performance of butadiene rubber, contains a large amount of fluorine elements on crosslinking sites, can effectively prevent the aging of polymers, realizes the recycling of PP materials, and can well utilize the light weight and waterproof performance of the PP materials.

Description

Recycling processing technology based on waste PP plastic
Technical Field
The invention belongs to the field of plastic recovery, and relates to a recovery processing technology based on waste PP plastic.
Background
The PP material has high impact resistance, high mechanical property and toughness, resists various organic solvents and acid-base corrosion and is widely applied, but the anti-aging performance and low-temperature resistance of the PP material are low, the PP material is degraded in performance through aging and low-temperature action after long-term use, the PP material is difficult to recycle after recovery, and the waste PP material is difficult to decompose, so that the environment is polluted and resources are wasted.
Disclosure of Invention
The invention aims to provide a recovery processing technology based on waste PP plastic, which is characterized in that the waste PP material and butadiene rubber are subjected to free polymerization through an antioxidant crosslinking agent, the prepared antioxidant crosslinking agent contains two olefin groups, and can be subjected to polymerization reaction with the PP plastic and butadiene rubber simultaneously under the action of an initiator, so that the PP plastic and butadiene rubber are subjected to polymerization crosslinking through the antioxidant crosslinking agent, the prepared product has the performance of both PP plastic and butadiene rubber, and meanwhile, a large amount of fluorine elements are contained on crosslinking sites, so that the aging of a polymer can be effectively prevented, the recycling of the PP material is realized, and the light and waterproof performance of the PP material can be well utilized.
The purpose of the invention can be realized by the following technical scheme:
a recycling and processing technology based on waste PP plastics comprises the following specific processing steps:
firstly, adding waste PP plastic into a grinder for grinding and granulating;
secondly, simultaneously adding the PP plastic master batch and the butadiene rubber into a plasticator, melting and plasticating for 2-3min, then adding the antioxidant cross-linking agent and the sodium persulfate into the mixture, plasticating for 1-2h, then adding the plasticizer, the nano silicon dioxide, the quartz powder and the carbon black into the mixture, continuing to mix for 2-3min, and then discharging the rubber; the PP plastic master batch and the butadiene rubber are mixed according to the mass ratio of 1: 1.2, simultaneously adding 1.6-1.7g of antioxidant cross-linking agent, 12-14g of sodium persulfate, 0.8-0.9g of plasticizer, 1.3-1.5g of nano silicon dioxide, 4-5g of quartz powder and 2-3g of carbon black into per 100 g of PP plastic master batch;
the preparation process of the antioxidant cross-linking agent is as follows:
①, weighing a certain amount of 4-diethylamino salicylaldehyde, adding the 4-diethylamino salicylaldehyde into an acetone solution, stirring for dissolving, then adding 2, 6-difluoroaniline into a reaction container, heating to 60-70 ℃, carrying out reflux reaction for 5-6h, and then carrying out reduced pressure distillation to obtain a product A, wherein the 4-diethylamino salicylaldehyde and the 2, 6-difluoroaniline are mixed according to the mass ratio of 1: 1 to prepare the product A, and the 4-diethylamino salicylaldehyde contains aldehyde groups and can react with amino groups in the 2, 6-difluoroaniline to generate-C-N-bonds, so that two fluorine elements are introduced into the product A;
② adding a mixed acid solution obtained by mixing concentrated sulfuric acid and acetic acid solution according to a volume ratio of 1: 6 into a reaction container, adding a product A into the reaction container, stirring for dissolving, cooling to 10-15 ℃, adding a formaldehyde solution and diallylamine with a mass concentration of 37% into the reaction container, stirring for reacting for 2-3h, heating to 30-35 ℃, stirring for reacting for 1h, adding the obtained product solution into ice water with a temperature of-5-0 ℃, stirring for solid precipitation, filtering, washing and drying to obtain the antioxidant crosslinking agent, wherein 8-9mL of the mixed acid solution is added into each gram of the product A, 0.86-0.89g of the formaldehyde solution with a mass concentration of 37% and 0.23-0.24g of the diallylamine are added, the amino group of the phenolic hydroxyl group has an ortho-position activating effect, the para-position hydrogen ion of the phenolic hydroxyl group has a higher active double bond, the C-N-double bond has a meta-position activating effect, the amino group of the phenolic hydroxyl group has a higher active hydrogen ion, the para-position double bond, the amino group has a higher active hydrogen ion performance, the methylation effect, the cis-amino group and the meta-position activating effect, the antioxidant crosslinking initiator can be used for preparing crosslinked plastic, and the antioxidant crosslinking initiator, so that the antioxidant crosslinking rubber can be introduced into a crosslinking plastic, and a crosslinking plastic with a crosslinking plastic, so that the antioxidant crosslinking rubber can be prepared under the polypropylene rubber, and a great amount of the antioxidant crosslinking rubber can have an antioxidant crosslinking initiator can have an aging-resistant crosslinking rubber, and a great amount of a crosslinking;
thirdly, coating the melted sizing material on the surface of the asbestos cloth, cooling and solidifying, coating a layer of melted sizing material on the bottom surface of the asbestos cloth, and cooling and solidifying to obtain a waterproof sheet layer; wherein the thickness of the sizing material coated on the upper surface and the lower surface is 1mm-1.5 mm;
fourthly, coating a layer of pressure-sensitive adhesive on the bottom surface of the waterproof sheet layer, and then adhering a layer of release paper through the pressure-sensitive adhesive to obtain the waterproof roll; the PP plastic is the lightest plastic in the plastics, has higher corrosion resistance and waterproof performance, but has lower low-temperature resistance, and the butadiene rubber has higher low-temperature resistance, so that the polymer prepared by polymerizing the PP plastic and the butadiene rubber through the antioxidant crosslinking agent has the performance of both the PP plastic and the butadiene rubber, not only has light weight, but also can resist low temperature, and contains a large amount of fluorine elements on crosslinking sites, thereby effectively preventing the aging of the polymer.
The invention has the beneficial effects that:
according to the invention, the waste PP material and the butadiene rubber are subjected to free polymerization through the antioxidant cross-linking agent, and the prepared antioxidant cross-linking agent contains two olefin groups, so that the prepared antioxidant cross-linking agent can be subjected to polymerization reaction with PP plastic and butadiene rubber simultaneously under the action of an initiator, and the PP plastic and the butadiene rubber are subjected to polymerization cross-linking through the antioxidant cross-linking agent, so that the prepared product has the performances of both PP plastic and butadiene rubber, not only is light in weight and high in waterproof performance, but also can resist low temperature and simultaneously contains a large amount of fluorine elements on cross-linking sites, the aging of the polymer can be effectively prevented, and the recycling of the PP material is realized.
Detailed Description
Example 1:
the specific preparation process of the antioxidant cross-linking agent is as follows:
①, weighing 1.93g of 4-diethylamino salicylaldehyde, adding the weighed 1.93g of 4-diethylamino salicylaldehyde into 12mL of acetone solution, stirring for dissolving, then adding 1.29g of 2, 6-difluoroaniline into a reaction vessel, heating to 60-70 ℃, carrying out reflux reaction for 5-6 hours, and then carrying out reduced pressure distillation to obtain a product A;
② adding 8mL of mixed acid solution of concentrated sulfuric acid and acetic acid solution which are mixed according to the volume ratio of 1: 6 into a reaction vessel, then adding 1g of the product A into the reaction vessel, stirring and dissolving, cooling to 10-15 ℃, then adding 0.86g of 37% formaldehyde solution and 0.23g of diallylamine into the reaction vessel, stirring and reacting for 2-3h, then heating to 30-35 ℃, stirring and reacting for 1h, then adding the obtained product solution into ice water at-5-0 ℃, stirring and precipitating solids, filtering, washing and drying to obtain the antioxidant cross-linking agent.
Example 2:
a recycling and processing technology based on waste PP plastics comprises the following specific processing steps:
firstly, adding waste PP plastic into a grinder for grinding and granulating;
secondly, simultaneously adding 1kg of PP plastic master batch and 1.2kg of butadiene rubber into a plasticator, melting and plasticating for 2-3min, then adding 16g of the antioxidant cross-linking agent prepared in the example 1 and 120g of sodium persulfate into the mixture, plasticating for 1-2h, then adding 8g of plasticizer, 13g of nano-silica, 40g of quartz powder and 20g of carbon black into the mixture, continuing to mix for 2-3min, and then discharging rubber;
thirdly, coating the melted sizing material on the surface of the asbestos cloth, cooling and solidifying, coating a layer of melted sizing material on the bottom surface of the asbestos cloth, and cooling and solidifying to obtain a waterproof sheet layer; wherein the thickness of the sizing material coated on the upper surface and the lower surface is 1mm-1.5 mm;
and fourthly, coating a layer of pressure-sensitive adhesive on the bottom surface of the waterproof sheet layer, and then adhering a layer of release paper through the pressure-sensitive adhesive to obtain the waterproof roll.
Example 3:
a recycling and processing technology based on waste PP plastics comprises the following specific processing steps:
firstly, adding waste PP plastic into a grinder for grinding and granulating;
secondly, simultaneously adding 1kg of PP plastic master batch and 1.2kg of butadiene rubber into a plasticator, melting and plasticating for 2-3min, then adding 17g of the antioxidant cross-linking agent prepared in the example 1 and 140g of sodium persulfate into the mixture, plasticating for 1-2h, then adding 89g of plasticizer, 15g of nano silicon dioxide, 50g of quartz powder and 30g of carbon black into the mixture, continuing to mix for 2-3min, and then discharging rubber;
thirdly, coating the melted sizing material on the surface of the asbestos cloth, cooling and solidifying, coating a layer of melted sizing material on the bottom surface of the asbestos cloth, and cooling and solidifying to obtain a waterproof sheet layer; wherein the thickness of the sizing material coated on the upper surface and the lower surface is 1mm-1.5 mm;
and fourthly, coating a layer of pressure-sensitive adhesive on the bottom surface of the waterproof sheet layer, and then adhering a layer of release paper through the pressure-sensitive adhesive to obtain the waterproof roll.
Example 4:
a recycling and processing technology based on waste PP plastics comprises the following specific processing steps:
firstly, adding waste PP plastic into a grinder for grinding and granulating;
secondly, simultaneously adding 1kg of PP plastic master batch and 1.2kg of butadiene rubber into a plasticator, melting and plasticating for 2-3min, then adding 17g of antioxidant KY405 and 140g of sodium persulfate, plasticating for 1-2h, then adding 89g of plasticizer, 15g of nano silicon dioxide, 50g of quartz powder and 30g of carbon black, continuing to mix for 2-3min, and then discharging rubber;
thirdly, coating the melted sizing material on the surface of the asbestos cloth, cooling and solidifying, coating a layer of melted sizing material on the bottom surface of the asbestos cloth, and cooling and solidifying to obtain a waterproof sheet layer; wherein the thickness of the sizing material coated on the upper surface and the lower surface is 1mm-1.5 mm;
and fourthly, coating a layer of pressure-sensitive adhesive on the bottom surface of the waterproof sheet layer, and then adhering a layer of release paper through the pressure-sensitive adhesive to obtain the waterproof roll.
Example 5:
the specific preparation process of the rubber waterproof roll material is as follows:
firstly, simultaneously adding 2.2kg of butadiene rubber into a plasticator, melting and plasticating for 2-3min, then adding 17g of the antioxidant cross-linking agent prepared in the example 1 and 140g of sodium persulfate, plasticating for 1-2h, then adding 89g of plasticizer, 15g of nano silicon dioxide, 50g of quartz powder and 30g of carbon black, continuing to mix for 2-3min, and then discharging rubber;
secondly, coating the melted sizing material on the surface of the asbestos cloth, cooling and solidifying, coating a layer of melted sizing material on the bottom surface of the asbestos cloth, and cooling and solidifying to obtain a waterproof sheet layer; wherein the thickness of the sizing material coated on the upper surface and the lower surface is 1mm-1.5 mm;
and thirdly, coating a layer of pressure-sensitive adhesive on the bottom surface of the waterproof sheet layer, and then adhering a layer of release paper through the pressure-sensitive adhesive to obtain the waterproof roll.
Example 6:
test pieces with the same length and width were cut from the waterproofing membranes prepared in examples 2 and 5, and the test pieces were weighed by mass, respectively, and the weight of the test pieces in example 2 was recorded as M0The weight of the applicator prepared in example 5 is recorded as M1Then, the lightweight ratio P ═ (M) of the waterproofing membrane prepared in example 2 was calculated1-M0)/M1X 100%, and the measurement result was 15.32%, from which it can be seen that the weight of the material prepared by compounding the PP material with butadiene rubber was lighter than that of pure butadiene rubber, sinceThe waterproof roll prepared in the embodiment 2 is prepared by polymerizing the PP material and the butadiene rubber, and the PP plastic has light weight, so that the weight of the whole waterproof roll is reduced.
Example 7:
test pieces with the same length were cut out from the waterproof rolls prepared in examples 2 to 5, and then the test pieces were put into a xenon weather-resistant test box to undergo ultraviolet aging treatment for 10 days, wherein the ultraviolet irradiation intensity was 45mW/cm2The temperature is 50 ℃, the air humidity is 40 percent, then the tensile strength of the waterproof coiled material before and after aging is tested, and the strength before aging is N1Strength after aging is N2Wherein the tensile strength change rate is (N)1-N2)/N1X 100%, the measurement results are shown in Table 2;
TABLE 2 tensile Strength Change Rate
Example 2 Example 3 Example 4 Example 5
Percent change in tensile Strength% 6.8 6.7 15.2 4.6
As shown in table 2, the waterproof rolls prepared in examples 2 and 3 are prepared by compounding waste PP plastic and butadiene rubber, but have high anti-aging performance after cross-linking polymerization by the antioxidant cross-linking agent, and the waste PP plastic and butadiene rubber are directly cross-linked and fixed by the antioxidant cross-linking agent through radical polymerization reaction, so that the antioxidant cross-linking agent in the prepared waterproof roll is uniformly distributed on cross-linking sites, and the prepared waterproof roll has high antioxidant performance which is not much changed from the pure butadiene rubber prepared in example 5 after anti-aging cross-linking, while the antioxidant is added in the preparation process of the waterproof cross-linking agent directly through physical mixing in example 4, although the anti-aging effect can be achieved, the antioxidant is not uniformly mixed in the waterproof material directly through physical mixing, thereby greatly reducing the anti-aging performance.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims (6)

1. A recycling and processing technology based on waste PP plastics is characterized by comprising the following specific processing steps:
firstly, adding waste PP plastic into a grinder for grinding and granulating;
secondly, simultaneously adding the PP plastic master batch and the butadiene rubber into a plasticator, melting and plasticating for 2-3min, then adding the antioxidant cross-linking agent and the sodium persulfate into the mixture, plasticating for 1-2h, then adding the plasticizer, the nano silicon dioxide, the quartz powder and the carbon black into the mixture, continuing to mix for 2-3min, and then discharging the rubber;
thirdly, coating the melted sizing material on the surface of the asbestos cloth, cooling and solidifying, coating a layer of melted sizing material on the bottom surface of the asbestos cloth, and cooling and solidifying to obtain a waterproof sheet layer;
and fourthly, coating a layer of pressure-sensitive adhesive on the bottom surface of the waterproof sheet layer, and then adhering a layer of release paper through the pressure-sensitive adhesive to obtain the waterproof roll.
2. The recycling and processing technology of the waste PP plastic according to claim 1, wherein in the second step, the mass ratio of PP plastic master batch to butadiene rubber is 1: 1.2, simultaneously adding 1.6-1.7g of antioxidant cross-linking agent, 12-14g of sodium persulfate, 0.8-0.9g of plasticizer, 1.3-1.5g of nano silicon dioxide, 4-5g of quartz powder and 2-3g of carbon black into each 100 g of PP plastic master batch.
3. The recycling process of waste PP plastic according to claim 1, wherein the antioxidant cross-linking agent is prepared by the following steps:
①, weighing a certain amount of 4-diethylamino salicylaldehyde, adding the 4-diethylamino salicylaldehyde into an acetone solution, stirring and dissolving, then adding 2, 6-difluoroaniline into a reaction vessel, heating to 60-70 ℃, carrying out reflux reaction for 5-6 hours, and then carrying out reduced pressure distillation to obtain a product A;
② adding a mixed acid solution obtained by mixing concentrated sulfuric acid and acetic acid solution according to a volume ratio of 1: 6 into a reaction container, then adding the product A into the reaction container, stirring and dissolving, cooling to 10-15 ℃, then adding a formaldehyde solution and diallylamine with a mass concentration of 37% into the reaction container, stirring and reacting for 2-3h, then heating to 30-35 ℃, stirring and reacting for 1h, then adding the obtained product solution into ice water with a temperature of-5-0 ℃, stirring until solids are separated out, filtering, washing and drying to obtain the antioxidant cross-linking agent.
4. The recycling process of waste PP plastic according to claim 3, wherein 4-diethylamino salicylaldehyde and 2, 6-difluoroaniline are mixed in the mass ratio of 1: 1 in step ①.
5. The recycling process of waste PP plastic as claimed in claim 3, wherein 8-9mL of mixed acid solution, 0.86-0.89g of formaldehyde solution with mass concentration of 37% and 0.23-0.24g of diallylamine are added to each gram of product A in step ②.
6. The recycling process of waste PP plastic according to claim 1, wherein the thickness of the sizing coated on the upper and lower surfaces of the asbestos cloth in the third step is 1mm to 1.5 mm.
CN201910876828.6A 2019-09-17 2019-09-17 Recycling processing technology based on waste PP plastic Withdrawn CN110698992A (en)

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