WO2023281438A1 - Coated paper pulp based products, and method of manufacturing the same - Google Patents

Coated paper pulp based products, and method of manufacturing the same Download PDF

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Publication number
WO2023281438A1
WO2023281438A1 PCT/IB2022/056282 IB2022056282W WO2023281438A1 WO 2023281438 A1 WO2023281438 A1 WO 2023281438A1 IB 2022056282 W IB2022056282 W IB 2022056282W WO 2023281438 A1 WO2023281438 A1 WO 2023281438A1
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WO
WIPO (PCT)
Prior art keywords
paper pulp
coated paper
bottle
suspension
thickener
Prior art date
Application number
PCT/IB2022/056282
Other languages
French (fr)
Inventor
Samiksha GOVIL
Original Assignee
Govil Samiksha
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Govil Samiksha filed Critical Govil Samiksha
Publication of WO2023281438A1 publication Critical patent/WO2023281438A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/43—Thickening agents
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00—Carbon; Compounds thereof
    • C01B32/15—Nano-sized carbon materials
    • C01B32/182—Graphene
    • C01B32/198—Graphene oxide
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D103/00—Coating compositions based on starch, amylose or amylopectin or on their derivatives or degradation products
    • C09D103/02—Starch; Degradation products thereof, e.g. dextrin
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D189/00—Coating compositions based on proteins; Coating compositions based on derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • 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
    • C08K3/042—Graphene or derivatives, e.g. graphene oxides
    • 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
    • C08K5/00—Use of organic ingredients
    • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
    • C08K5/0016—Plasticisers
    • 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

Definitions

  • the present invention relates, in general, to a compostable ecofriendly alternative to plastic bottles, especially single use plastic bottles and in particular relates to coating composition of graphene nanoparticles, a coated paper pulp, and articles thereof; and processes of manufacturing the same.
  • the present invention also relates to a bottle made of the coated paper pulp, which is waterproof and biodegradable, and the process of its manufacture.
  • Plastic is one of the main sources of pollution that afflict land, oceans and waterways. Due to its properties like durability and affordability, plastics are employed in numerous applications. However, plastic pollution due to accumulation of plastic products, especially by using single use plastic, such as plastic bottles, bags, packaging materials etc. are a threat to the earth’s environment, thereby adversely affecting wildlife, wildlife habitat and human. Numerous efforts are being undertaken to reduce plastic waste from getting dumped into the environment.
  • An object of the present invention is to reduce single use plastic waste. It is another object of the present invention to protect the environment from plastic pollution. It is yet another object of the present subject matter to provide a coating composition which when used with paper pulp renders it waterproof and completely biodegradable. Hence, another object of the invention is to provide a compostable ecofriendly alternative article to plastic bottles, bags and other articles.
  • the present invention relates to a coating composition comprising 0.1%- 0.5% graphene oxide nanoparticles, 10%-30% globular protein, 7%-17% plasticizer, 0.5%-3% thickener, 5%-20% filler, 0.5%-2.9% fungicide and water.
  • the present also relates to a coated paper pulp comprising the coating composition, said composition comprising 0.1%- 0.5% graphene oxide nanoparticles, 10%-30% globular protein, 7%-17% plasticizer, 0.5%-3% thickener, 5%-20% filler, 0.5%-2.9% fungicide and water.
  • coated paper pulp can be used to make articles that can be alternatives to plastics, such as a bottle which is biodegradable as well as water proof.
  • the present invention also relates to an article manufactured using the coated paper pulp. Further, the present invention also relates to a method for preparing the coated paper pulp comprising preparing emulsion of 0.1%- 0.5% graphene oxide in water, and a dextrin, or a saccharide or a polysaccharide or mixtures thereof; adding of 10%-30% globular protein, 7%-17% plasticizer, 0.5% to 3% thickener, 5%-20% filler, and 0.5%-2.9% fungicide to form a suspension; coating of a paper pulp with the suspension; optionally removing excess suspension; thermal annealing at a temperature of 180 °C for 1-3 hours; and optionally drying of the coated paper pulp.
  • the present invention provides a coating composition comprising 0.1%- 0.5% graphene oxide nanoparticles, 10%-30% globular protein, 7%-17% plasticizer, 0.5%-3% thickener, 5%- 20% filler, 0.5%-2.9% fungicide and water.
  • the water, used a medium for the reaction may or may not be combined with a dextrin, a saccharide or a polysaccharide, and makes up the reaction mixture to 100%.
  • a coating composition comprising 0.2% graphene oxide nanoparticles, 20%-30% globular protein, 12%-17% plasticizer, 2.9% thickener, 10%-15% filler, 2% fungicide and water.
  • Another embodiment of the present invention provides a coated paper pulp comprising a coating composition, said composition comprising 0.1%- 0.5% graphene oxide nanoparticles, 10%-30% globular protein, 7%-17% plasticizer, 0.5%-3% thickener, 5%- 20% filler, 0.5%-2.9% fungicide and water.
  • the present invention provides a coated paper pulp, wherein the coating composition comprises 0.2% graphene oxide nanoparticles, 20%-30% globular protein, 12%-17% plasticizer, 2.9% thickener, 10%-15% filler, 2% fungicide and water.
  • the present invention employs graphene, which comprises a single layer of carbon atoms made from graphite. Graphene is used to coat paper and cardboard to stop gas and liquid from escaping and make it stronger. Moreover, graphene has an antibacterial effect that makes it useful in food packaging.
  • Still another embodiment provides an article comprising the coated paper pulp in accordance with the instant invention.
  • the article is preferably a bottle. Annealing of the formed paper pulp bottles in accordance with the present invention, is performed to create permeability. Therefore, the present invention ensures that the coating has affinity for cellulosic surface.
  • the open end of the bottle made from the coated paper pulp, in accordance with the present invention are closed with a plastic cap.
  • An embodiment of the present invention also provides a method for preparing the coated paper pulp comprising preparing emulsion of 0.1%- 0.5% graphene oxide in water, and a dextrin, or a saccharide or a polysaccharide or mixtures thereof; adding of 10%-30% globular protein, 7%-17% plasticizer, 0.5% to 3% thickener, 5%-20% filler, and 0.5%-2.9% fungicide to form a suspension; coating of a paper pulp with the suspension; optionally removing excess suspension; thermal annealing at a temperature of 180 °C for 1-3 hours; and optionally drying of the coated paper pulp.
  • Another embodiment of the present invention provides a method for preparing a coated paper pulp, comprising preparing emulsion of 0.2% graphene oxide in water, and a dextrin, or a saccharide or a polysaccharide or mixtures thereof; adding of 10%-30% globular protein, 7%-17% plasticizer, 2.9% thickener, 5%-20% filler, and 2% fungicide to form a suspension; coating of a paper pulp with the suspension by spraying, dipping or enrobing; optionally removing excess suspension; thermal annealing at a temperature of 180 °C for 1-3 hours; and optionally drying of the coated paper pulp.
  • the paper pulp, before the coating with the suspension is moulded in the shape of a half-bottle longitudinally; followed by coating of the half-bottle made of the paper pulp mould with the suspension by spraying; thermal annealing of the coated half bottle at a temperature of 180 °C for 1-3 hours to obtained an annealed paper pulp mould in form of a half-bottle; and joining the annealed half bottles to form a single bottle.
  • the thermal treatment transforms the paper from hydrophilic to hydrophobic.
  • Yet another embodiment of the present invention provides a biodegradable bottle comprising the coating composition in accordance with the present invention.
  • the coating composition as prepared in example 1 is thereafter applied to the surface of a paper pulp by dipping, enrobing, spraying or any other suitable application.
  • the excess of the composition is removed by suitable means, and the coating is allowed to set or dry by warm air flow, prior to further processing or packaging. Coating thickness, pick-up and setting of the coating is accelerated by control of both the temperature of the coating composition of matter at the time of application and the surface temperature of the food product.
  • two halves of the bottle are first prepared through vacuum pulping process.
  • the two halves are dried naturally and hot pressed.
  • the hot-pressed bottle is sprayed with the coating composition and baked or annealed in the oven to almost 180°C. Annealing makes the final product permeable to oxygen which is helpful for any kind of food packaging and carbonated drinks.
  • a pouch head is kept in the center of the bottle, and biodegradable glue is applied on the lip of the bottle half.
  • the bottle halves are attached together with the pouch in the center.
  • the bottle prepared by using the coated paper pulp of the present invention was tested and found to be water proof, hence devoid of leakage.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Inorganic Chemistry (AREA)
  • Nanotechnology (AREA)
  • Paper (AREA)

Abstract

The present invention relates to a coating composition comprising graphene oxide nanoparticles, with other constituents comprising globular protein, plasticizer, thickener, filler, fungicide, and water. The present also relates to a coated paper pulp comprising the coating composition. These coated paper pulp can be used to make articles that can be alternatives to plastics, such as a bottle which is biodegradable as well as water proof. These articles are compostable and ecofriendly. The invention also provides method of preparing the coated paper pulp articles.

Description

COATED PAPER PULP BASED PRODUCTS, AND METHOD OF MANUFACTURING THE SAME
TECHNICAL FIELD
The present invention relates, in general, to a compostable ecofriendly alternative to plastic bottles, especially single use plastic bottles and in particular relates to coating composition of graphene nanoparticles, a coated paper pulp, and articles thereof; and processes of manufacturing the same.
The present invention also relates to a bottle made of the coated paper pulp, which is waterproof and biodegradable, and the process of its manufacture.
BACKGROUND
Plastic is one of the main sources of pollution that afflict land, oceans and waterways. Due to its properties like durability and affordability, plastics are employed in numerous applications. However, plastic pollution due to accumulation of plastic products, especially by using single use plastic, such as plastic bottles, bags, packaging materials etc. are a threat to the earth’s environment, thereby adversely affecting wildlife, wildlife habitat and human. Numerous efforts are being undertaken to reduce plastic waste from getting dumped into the environment.
However, there still exists a well felt need to reduce plastic waste and provide ecofriendly alternative, especially to single use bottles, bags, packaging materials and the like in a simple and cost-effective manner without compromising the ease of usability.
OBJECT OF THE INVENTION
An object of the present invention is to reduce single use plastic waste. It is another object of the present invention to protect the environment from plastic pollution. It is yet another object of the present subject matter to provide a coating composition which when used with paper pulp renders it waterproof and completely biodegradable. Hence, another object of the invention is to provide a compostable ecofriendly alternative article to plastic bottles, bags and other articles.
It is yet another object of the present subject matter to provide a solution that has the potential to replace all types of plastic packaging.
SUMMARY
The present invention relates to a coating composition comprising 0.1%- 0.5% graphene oxide nanoparticles, 10%-30% globular protein, 7%-17% plasticizer, 0.5%-3% thickener, 5%-20% filler, 0.5%-2.9% fungicide and water. The present also relates to a coated paper pulp comprising the coating composition, said composition comprising 0.1%- 0.5% graphene oxide nanoparticles, 10%-30% globular protein, 7%-17% plasticizer, 0.5%-3% thickener, 5%-20% filler, 0.5%-2.9% fungicide and water.
These coated paper pulp can be used to make articles that can be alternatives to plastics, such as a bottle which is biodegradable as well as water proof.
The present invention also relates to an article manufactured using the coated paper pulp. Further, the present invention also relates to a method for preparing the coated paper pulp comprising preparing emulsion of 0.1%- 0.5% graphene oxide in water, and a dextrin, or a saccharide or a polysaccharide or mixtures thereof; adding of 10%-30% globular protein, 7%-17% plasticizer, 0.5% to 3% thickener, 5%-20% filler, and 0.5%-2.9% fungicide to form a suspension; coating of a paper pulp with the suspension; optionally removing excess suspension; thermal annealing at a temperature of 180 °C for 1-3 hours; and optionally drying of the coated paper pulp. These and other features, aspects, and advantages of the present subject matter will become better understood with reference to the following description. This statement is provided to introduce a selection of concepts in a simplified form. This statement is not intended to identify key features or essential features of the subject matter, nor is it intended to be used to limit the scope of the subject matter.
DETAILED DESCRPTION OF THE INVENTION
The specification may refer to “an”, “one”, “different” or “some” embodiment s) in several locations. This does not necessarily imply that each such reference is to the same embodiment(s), or that the feature only applies to a single embodiment. Single features of different embodiments may also be combined to provide other embodiments.
As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless expressly stated otherwise. It will be further understood that the terms “includes”, “comprises”, “including” and/or “comprising” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The present invention provides a coating composition comprising 0.1%- 0.5% graphene oxide nanoparticles, 10%-30% globular protein, 7%-17% plasticizer, 0.5%-3% thickener, 5%- 20% filler, 0.5%-2.9% fungicide and water. The water, used a medium for the reaction may or may not be combined with a dextrin, a saccharide or a polysaccharide, and makes up the reaction mixture to 100%.
In an embodiment of the present invention, it provides a coating composition comprising 0.2% graphene oxide nanoparticles, 20%-30% globular protein, 12%-17% plasticizer, 2.9% thickener, 10%-15% filler, 2% fungicide and water. Another embodiment of the present invention provides a coated paper pulp comprising a coating composition, said composition comprising 0.1%- 0.5% graphene oxide nanoparticles, 10%-30% globular protein, 7%-17% plasticizer, 0.5%-3% thickener, 5%- 20% filler, 0.5%-2.9% fungicide and water.
Yet in another embodiment of the present invention, it provides a coated paper pulp, wherein the coating composition comprises 0.2% graphene oxide nanoparticles, 20%-30% globular protein, 12%-17% plasticizer, 2.9% thickener, 10%-15% filler, 2% fungicide and water. The present invention employs graphene, which comprises a single layer of carbon atoms made from graphite. Graphene is used to coat paper and cardboard to stop gas and liquid from escaping and make it stronger. Moreover, graphene has an antibacterial effect that makes it useful in food packaging.
Still another embodiment provides an article comprising the coated paper pulp in accordance with the instant invention. The article is preferably a bottle. Annealing of the formed paper pulp bottles in accordance with the present invention, is performed to create permeability. Therefore, the present invention ensures that the coating has affinity for cellulosic surface. In a preferred embodiment, the open end of the bottle made from the coated paper pulp, in accordance with the present invention, are closed with a plastic cap.
An embodiment of the present invention also provides a method for preparing the coated paper pulp comprising preparing emulsion of 0.1%- 0.5% graphene oxide in water, and a dextrin, or a saccharide or a polysaccharide or mixtures thereof; adding of 10%-30% globular protein, 7%-17% plasticizer, 0.5% to 3% thickener, 5%-20% filler, and 0.5%-2.9% fungicide to form a suspension; coating of a paper pulp with the suspension; optionally removing excess suspension; thermal annealing at a temperature of 180 °C for 1-3 hours; and optionally drying of the coated paper pulp. Another embodiment of the present invention provides a method for preparing a coated paper pulp, comprising preparing emulsion of 0.2% graphene oxide in water, and a dextrin, or a saccharide or a polysaccharide or mixtures thereof; adding of 10%-30% globular protein, 7%-17% plasticizer, 2.9% thickener, 5%-20% filler, and 2% fungicide to form a suspension; coating of a paper pulp with the suspension by spraying, dipping or enrobing; optionally removing excess suspension; thermal annealing at a temperature of 180 °C for 1-3 hours; and optionally drying of the coated paper pulp.
In another embodiment, the paper pulp, before the coating with the suspension is moulded in the shape of a half-bottle longitudinally; followed by coating of the half-bottle made of the paper pulp mould with the suspension by spraying; thermal annealing of the coated half bottle at a temperature of 180 °C for 1-3 hours to obtained an annealed paper pulp mould in form of a half-bottle; and joining the annealed half bottles to form a single bottle. The thermal treatment transforms the paper from hydrophilic to hydrophobic. By making bottles in two halves, it is ensured that the paper is formed suitably to take the shape of a bottle. In an embodiment, the coating can be done either on the halves or when the complete bottle is formed by joining the two halves.
Yet another embodiment of the present invention provides a biodegradable bottle comprising the coating composition in accordance with the present invention.
EXAMPLES
The disclosure will now be illustrated with working examples, which is intended to illustrate the working of the invention and not intended to take restrictively to imply any limitations on the scope of the present invention. Other embodiments are also possible. Example 1:
0.3% of graphene oxide is combined with water to make a colloidal dispersion along with a dextrin or other soluble saccharides or polysaccharide using sonication or emulsified triglyceride or an emulsifier. This facilitates nanoscrolls monolayer specially modified with oxygen free radical and graphene oxide layers with holes. Further to the suspension are added biologically degradable 30% globular protein, 17% plasticizer, 3% thickener, 15% filler, and 2% fungicide. The plasticizer, thickener and filler can be any of that are well known in the art.
Example 2:
The coating composition as prepared in example 1 is thereafter applied to the surface of a paper pulp by dipping, enrobing, spraying or any other suitable application. The excess of the composition is removed by suitable means, and the coating is allowed to set or dry by warm air flow, prior to further processing or packaging. Coating thickness, pick-up and setting of the coating is accelerated by control of both the temperature of the coating composition of matter at the time of application and the surface temperature of the food product.
Example 3:
0.2% of graphene oxide is combined with water to make a colloidal dispersion along with a dextrin using sonication or emulsified triglyceride or an emulsifier. To the suspension are added biologically degradable 15% globular protein, 10% plasticizer, 2.9% thickener, 15% filler, and 2% fungicide. The suspension so obtained can be used for the coating of a paper pulp. Example 4:
In order to prepare a coated bottle with the coated paper pulp of examples 1 or 3, two halves of the bottle are first prepared through vacuum pulping process. The two halves are dried naturally and hot pressed. The hot-pressed bottle is sprayed with the coating composition and baked or annealed in the oven to almost 180°C. Annealing makes the final product permeable to oxygen which is helpful for any kind of food packaging and carbonated drinks. Finally, a pouch head is kept in the center of the bottle, and biodegradable glue is applied on the lip of the bottle half. The bottle halves are attached together with the pouch in the center.
The bottle prepared by using the coated paper pulp of the present invention was tested and found to be water proof, hence devoid of leakage.
While the preferred embodiments of the present invention have been described hereinabove, it should be understood that various changes, adaptations, and modifications may be made therein without departing from the spirit of the invention and the scope of the appended claims. It will be obvious to a person skilled in the art that the present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. The described embodiments are to be considered in all respects only as illustrative and not restrictive.

Claims

We Claim:
1. A coating composition comprising 0.1%- 0.5% graphene oxide nanoparticles, 10%- 30% globular protein, 7%-17% plasticizer, 0.5%-3% thickener, 5%-20% filler, 0.5%-2.9% fungicide and water.
2. The coating composition as claimed in claim 1, wherein the composition comprises 0.2% graphene oxide nanoparticles, 20%-30% globular protein, 12%-17% plasticizer, 2.9% thickener, 10%-15% filler, 2% fungicide and water.
3. A coated paper pulp comprising the coating composition as claimed in claim 1, said composition comprising 0.1%- 0.5% graphene oxide nanoparticles, 10%-30% globular protein, 7%-17% plasticizer, 0.5%-3% thickener, 5%-20% filler, 0.5%- 2.9% fungicide and water.
4. The coated paper pulp as claimed in claim 3, wherein the coating composition comprises 0.2% graphene oxide nanoparticles, 20%-30% globular protein, 12%- 17% plasticizer, 2.9% thickener, 10%-15% filler, 2% fungicide and water.
5. An article comprising the coated paper pulp as claimed in any of the claims 3 or 4.
6. The article as claimed in claim 5, wherein the article is a bottle.
7. A method for preparing the coated paper pulp as claimed in claim 3 comprising: preparing emulsion of 0.1%- 0.5% graphene oxide in water, and a dextrin, or a saccharide or a polysaccharide or mixtures thereof; adding of 10%-30% globular protein, 7%-17% plasticizer, 0.5% to 3% thickener, 5%-20% filler, and 0.5%-2.9% fungicide to form a suspension; coating of a paper pulp with the suspension; optionally removing excess suspension; thermal annealing at a temperature of 180 °C for 1-3 hours; and optionally drying of the coated paper pulp.
8. The method as claimed in claim 7, comprising preparing emulsion of 0.2% graphene oxide in water, and a dextrin, or a saccharide or a polysaccharide or mixtures thereof; adding of 10%-30% globular protein, 7%-17% plasticizer, 2.9% thickener, 5%-20% filler, and 2% fungicide to form a suspension; coating of a paper pulp with the suspension by spraying, dipping or enrobing; optionally removing excess suspension; thermal annealing at a temperature of 180 °C for 1-3 hours; and optionally drying of the coated paper pulp.
9. The method as claimed in claim 7, wherein the paper pulp before the coating with the suspension is moulded in the shape of a half-bottle longitudinally; followed by coating of the half-bottle made of the paper pulp mould with the suspension by spraying; thermal annealing of the coated half-bottle at a temperature of 180 °C for 1-3 hours to obtained an annealed paper pulp mould in form of a half-bottle; and joining the annealed half bottles to form a single bottle.
10. A biodegradable bottle comprising the coating composition as claimed in claim 1.
PCT/IB2022/056282 2021-07-07 2022-07-07 Coated paper pulp based products, and method of manufacturing the same WO2023281438A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN202111030585 2021-07-07
IN202111030585 2021-07-07

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WO2023281438A1 true WO2023281438A1 (en) 2023-01-12

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170037257A1 (en) * 2014-04-14 2017-02-09 Board Of Regents, The University Of Texas System Graphene-based coatings
WO2018083539A2 (en) * 2016-11-07 2018-05-11 Polynatural Holding Spa Coating compositions and methods of use thereof
ES2824117T3 (en) * 2014-07-23 2021-05-11 Henkel IP & Holding GmbH Expandable coating compositions and their use

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170037257A1 (en) * 2014-04-14 2017-02-09 Board Of Regents, The University Of Texas System Graphene-based coatings
ES2824117T3 (en) * 2014-07-23 2021-05-11 Henkel IP & Holding GmbH Expandable coating compositions and their use
WO2018083539A2 (en) * 2016-11-07 2018-05-11 Polynatural Holding Spa Coating compositions and methods of use thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
FELIX M., PEREZ-PUYANA V., ROMERO A., GUERRERO A.: "Development of protein-based bioplastics modified with different additives", JOURNAL OF APPLIED POLYMER SCIENCE, JOHN WILEY & SONS, INC., US, vol. 134, no. 42, 5 November 2017 (2017-11-05), US , pages 45430, XP093023087, ISSN: 0021-8995, DOI: 10.1002/app.45430 *

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