A formaldehyde-free, all-natural plant extract gum and its preparation method

Abstract

This invention discloses a zero-formaldehyde, all-natural plant-extract adhesive, comprising a main adhesive component, which is a compound of deep-sea brown algae extract and mussel protein extract. This adhesive is free of formaldehyde and phenolic chemical pollutants. Using deep-sea brown algae and mussel protein as core raw materials, this adhesive is completely free of formaldehyde and phenolic chemical pollutants, making it suitable for direct use in sensitive spaces such as children's rooms and elderly people's rooms, allowing for immediate occupancy after installation. The adhesive boasts a bonding strength ≥1.2 MPa, significantly improved waterproof and moisture-proof performance, and the adhesive layer remains intact after immersion in 70℃ hot water for 72 hours, making it suitable for humid environments such as kitchens and bathrooms. Furthermore, the natural antibacterial properties of the brown algae polyphenols and the termite-repellent properties of the extract create a multi-layered protective system that is waterproof, antibacterial, insect-proof, deformation-resistant, and environmentally friendly.

Description

Technical Field

[0001] This invention relates to the field of adhesive technology, specifically to a zero-formaldehyde pure natural plant extract adhesive and its preparation method. Background Technology

[0002] Adhesives are the core raw material in the production of home furnishing boards. Traditional board adhesives are mainly chemical adhesives such as urea-formaldehyde glue and phenol-formaldehyde glue. These adhesives contain toxic and harmful chemical pollutants such as formaldehyde and phenol. The formaldehyde release is generally between 0.05-0.1 mg / m³, and formaldehyde has the characteristic of long-term release, which will continuously cause indoor decoration pollution and easily cause respiratory diseases, skin allergies and other problems. They cannot meet the use needs of sensitive spaces such as children's rooms and elderly people's rooms.

[0003] To address formaldehyde pollution, some bio-based adhesives have emerged in existing technologies, mostly using single plant extracts as raw materials. However, these adhesives generally suffer from poor waterproofing and moisture resistance, insufficient bonding strength, and inadequate antibacterial and insect-repellent effects. For example, traditional bio-adhesives show delamination after being soaked in 70°C hot water for 24 hours, with a water absorption thickness expansion rate exceeding 12%, making them unusable in humid environments such as kitchens and bathrooms. Furthermore, they lack natural antibacterial and insect-repellent capabilities, requiring the addition of chemical additives, thus reducing the product's environmental friendliness. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a zero-formaldehyde pure natural plant extract adhesive and its preparation method, which solves the problems of formaldehyde pollution in traditional chemical adhesives and the insufficient performance of existing biological adhesives, while realizing the renewability of raw materials and the low-carbonization of the production process, and is suitable for the bonding needs of high-end home furnishing boards.

[0005] To address the aforementioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution: A formaldehyde-free, all-natural plant-based adhesive includes a main adhesive component, which is a compound of deep-sea brown algae extract and mussel protein extract. This adhesive is free of formaldehyde and phenolic chemical pollutants.

[0006] As a preferred embodiment of the zero-formaldehyde pure natural plant extract gum described in this invention, the mass ratio of the deep-sea brown algae extract to the mussel protein extract is (3-5):1.

[0007] As a preferred embodiment of the zero-formaldehyde pure natural plant extract gum described in this invention, it further includes 5-10 parts of a natural thickener, wherein the natural thickener is one or a combination of konjac gum and xanthan gum.

[0008] As a preferred embodiment of the zero-formaldehyde pure natural plant extract adhesive described in this invention, the adhesive has an adhesion strength ≥1.2MPa, the adhesive layer remains intact without delamination after soaking in hot water at 70℃ for 72h, and the water absorption thickness expansion rate is ≤8%.

[0009] As a preferred embodiment of the zero-formaldehyde pure natural plant extract gum described in this invention, the deep-sea brown algae extract is a compound of brown algae polyphenols and brown algae gum, with a mass ratio of (1-2):3.

[0010] A method for preparing a zero-formaldehyde pure natural plant extract gum, characterized by comprising the following steps: S1. Raw material pretreatment: Extract deep-sea brown algae extract and mussel protein extract separately, purify and concentrate to a solid content ≥30%, and set aside for later use; S2. Compound mixing: Add the pretreated main binder to the reactor and mix for 20-30 minutes at 40-50℃ and 300-500r / min. S3. Homogenization and emulsification: The stirred mixture is subjected to homogenization and emulsification treatment at a pressure of 20-30 MPa and a time of 10-15 min to obtain the initial emulsion. S4. Curing and Defoaming: The initial adhesive solution is cured at a constant temperature of 35-40℃ for 1-2 hours, while vacuum defoaming is performed. The vacuum degree is controlled at 0.08-0.1MPa, and the defoaming time is 15-20 minutes, thus obtaining the zero-formaldehyde pure natural plant extract adhesive.

[0011] Compared with existing technologies, the beneficial effects of this invention are as follows: The extract adhesive of this invention uses deep-sea brown algae and mussel protein as core raw materials, and is completely free of formaldehyde and phenolic chemical pollutants. It can be directly used in sensitive spaces such as children's rooms and elderly people's rooms, enabling immediate occupancy after board bonding; the adhesive bonding strength is ≥1.2MPa, the waterproof and moisture-proof performance is exponentially improved, the adhesive layer remains intact after soaking in 70℃ hot water for 72 hours, and the water absorption thickness expansion rate is ≤8%, making it suitable for humid environments such as kitchens and bathrooms. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below. Example

[0013] A formaldehyde-free, all-natural plant-extract adhesive includes a main adhesive component and a natural thickener. The main adhesive component consists of a deep-sea brown algae extract and a mussel protein extract in a mass ratio of 4:1. The deep-sea brown algae extract is a compound of brown algae polyphenols and alginate in a mass ratio of 1:3. The natural thickener is a compound of konjac gum and xanthan gum in a mass ratio of 1:1.

[0014] The above-mentioned method for preparing the extraction gel: Raw material pretreatment: Deep-sea brown algae extract and mussel protein extract were extracted by ultrasonic-assisted water extraction, with an ultrasonic power of 250W, an extraction temperature of 55℃, and an extraction time of 1.5h. The extracts were then purified by filtration through a 0.3μm microfiltration membrane and concentrated to a solid content of 35% for later use. Compound mixing: Add the pretreated raw materials into the reaction vessel and stir for 25 minutes at 45°C and 400 r / min. Homogenization and emulsification: Homogenization pressure 25MPa, homogenization time 12min, to obtain initial emulsion; Curing and defoaming: Curing at 38℃ for 1.5 hours, followed by vacuum defoaming (vacuum degree 0.09MPa, defoaming time 18min) to obtain the extraction gel.

[0015] The performance of the extract adhesive in this embodiment was tested, and the results were as follows: formaldehyde release 0.015 mg / m³, adhesive strength 1.3 MPa, adhesive layer intact after soaking in hot water at 70°C for 72 hours, water absorption thickness swelling rate 7%, inhibition rate against Escherichia coli 99.5%, inhibition rate against Staphylococcus aureus 99.3%, and ant repellency rate 98.5%. Example

[0016] A formaldehyde-free, all-natural plant-extract adhesive includes a main adhesive component and a natural thickener. The main adhesive component contains a deep-sea brown algae extract and a mussel protein extract in a mass ratio of 3:1. The deep-sea brown algae extract is a compound of brown algae polyphenols and brown algae gum in a mass ratio of 1:3. The natural thickener is pure konjac gum.

[0017] The above-mentioned method for preparing the extraction gel: Raw material pretreatment: Ultrasonic-assisted water extraction, ultrasonic power 200W, extraction temperature 50℃, extraction time 1h; purified by filtration through a 0.22μm microfiltration membrane, concentrated to a solid content of 30%, and set aside for later use; Mixing: Stir for 20 minutes at 40℃ and 300 r / min. Homogenization and emulsification: Homogenization pressure 20MPa, homogenization time 10min, to obtain initial emulsion; Curing and defoaming: Curing at 35℃ for 1 hour, followed by vacuum defoaming (vacuum degree 0.08MPa, defoaming time 15min) to obtain the extraction gel.

[0018] The performance of the extract adhesive in this embodiment was tested, and the results were as follows: formaldehyde release 0.016 mg / m³, adhesive strength 1.2 MPa, adhesive layer intact after soaking in hot water at 70°C for 72 hours, water absorption thickness swelling rate 7.5%, inhibition rate against Escherichia coli 99%, inhibition rate against Staphylococcus aureus 99%, and ant repellency rate 98%. Example

[0019] A formaldehyde-free, all-natural plant-extract adhesive includes a main adhesive component and a natural thickener. The main adhesive component contains a deep-sea brown algae extract and a mussel protein extract in a mass ratio of 5:1. The deep-sea brown algae extract is a compound of brown algae polyphenols and brown algin in a mass ratio of 2:3. The natural thickener is pure xanthan gum.

[0020] The above-mentioned method for preparing the extraction gel: Raw material pretreatment: Ultrasonic-assisted water extraction, ultrasonic power 300W, extraction temperature 60℃, extraction time 2h; purified by filtration through a 0.45μm microfiltration membrane, concentrated to a solid content of 40%, and set aside for later use; Mixing: Stir for 30 minutes at 50℃ and 500 r / min. Homogenization and emulsification: Homogenization pressure 30MPa, homogenization time 15min, to obtain initial emulsion; Curing and defoaming: Curing at 40℃ for 2 hours, followed by vacuum defoaming (vacuum degree 0.1MPa, defoaming time 20min) to obtain the extraction gel.

[0021] The performance of the extract adhesive in this embodiment was tested, and the results were as follows: formaldehyde release 0.014 mg / m³, adhesive strength 1.4 MPa, adhesive layer intact after soaking in hot water at 70°C for 72 hours, water absorption thickness swelling rate 6.5%, inhibition rate against Escherichia coli 99.6%, inhibition rate against Staphylococcus aureus 99.5%, and ant repellency rate 99%.

[0022] The zero-formaldehyde, all-natural plant-extract adhesive of this invention can be widely used for bonding various types of home furnishing boards, including cedar boards, multi-layer solid wood boards, OSB boards, PET boards, etc. It is suitable for the production of boards for all scenarios such as kitchen cabinets, bathroom mirror cabinets, wardrobes, and food storage cabinets. It can also be used for special bonding of children's furniture and elderly furniture.

[0023] Although the present invention has been described above with reference to embodiments, various modifications can be made thereto without departing from the scope of the invention. In particular, the exhaustive description of these combinations is not provided in this specification merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A formaldehyde-free, all-natural plant extract gum, characterized in that, It includes a main adhesive component, which is a compound of deep-sea brown algae extract and mussel protein extract. This extractive adhesive does not contain formaldehyde or phenolic chemical pollutants.

2. The zero-formaldehyde pure natural plant extract gum according to claim 1, characterized in that, The mass ratio of the deep-sea brown algae extract to the mussel protein extract is (3-5):

1.

3. The zero-formaldehyde pure natural plant extract gum according to claim 1, characterized in that, It also includes natural thickeners, which are one or a combination of two of konjac gum and xanthan gum.

4. The zero-formaldehyde pure natural plant extract gum according to claim 1, characterized in that, The adhesive strength of the extracted adhesive is ≥1.2MPa. After soaking in hot water at 70℃ for 72h, the adhesive layer remains intact without delamination, and the water absorption thickness swelling rate is ≤8%.

5. The zero-formaldehyde pure natural plant extract gum according to claim 1, characterized in that, The deep-sea brown algae extract is a compound of brown algae polyphenols and brown alginic acid, with a mass ratio of (1-2):

3.

6. A method for preparing a zero-formaldehyde pure natural plant extract gum as described in any one of claims 1-5, characterized in that, Includes the following steps: S1. Raw material pretreatment: Extract deep-sea brown algae extract and mussel protein extract separately, purify and concentrate to a solid content ≥30%, and set aside for later use; S2. Compounding and stirring: Add the pretreated main binder to the reactor and stir for 20-30 minutes at 40-50℃ and 300-500r / min. S3. Homogenization and emulsification: The stirred mixture is subjected to homogenization and emulsification treatment at a pressure of 20-30 MPa and a time of 10-15 min to obtain the initial emulsion. S4. Curing and Defoaming: The initial adhesive solution is cured at a constant temperature of 35-40℃ for 1-2 hours, while vacuum defoaming is performed. The vacuum degree is controlled at 0.08-0.1MPa, and the defoaming time is 15-20 minutes, thus obtaining the zero-formaldehyde pure natural plant extract adhesive.

7. The preparation method of zero-formaldehyde pure natural plant extract gum according to claim 6, characterized in that, In step S1, the extracts are all extracted using ultrasound-assisted water extraction with an ultrasound power of 200-300W, an extraction temperature of 50-60℃, and an extraction time of 1-2 hours. The purification process is carried out using microfiltration membrane filtration with a pore size of 0.22-0.45μm.