High-temperature-resistant biomass-based acrylate pressure-sensitive adhesive and preparation method of pressure-sensitive adhesive tape

Abstract

The invention relates to a high-temperature-resistant biomass-based acrylate pressure-sensitive adhesive which is characterized by comprising the following components in parts by mass: 20-40 parts of a biomass-based acrylate soft monomer; 20 to 40 parts of a petroleum-based acrylate soft monomer; 10 to 20 parts of a biomass-based acrylate hard monomer; 10-20 parts of a functional monomer; 70 to 120 parts of a solvent ethyl acetate; and 0.4 to 0.8 part of benzoyl peroxide serving as an initiator. The invention provides the high-temperature-resistant, environment-friendly and sustainable biomass-based acrylate pressure-sensitive adhesive and the preparation method of the pressure-sensitive adhesive tape, solves the problems that the existing acrylate pressure-sensitive adhesive mainly depends on non-renewable petrochemical resources, is not ideal in high temperature resistance and poor in environmental protection property, and shows a wide application prospect.

Description

Technical Field

[0001] The present invention belongs to the technical field of pressure-sensitive adhesives, and in particular relates to a high-temperature resistant biomass-based acrylate pressure-sensitive adhesive and a method for preparing a pressure-sensitive adhesive tape. Background Art

[0002] Pressure-sensitive adhesives (PSAs), also known as pressure-sensitive adhesives, essentially combine the viscosity of a liquid with the elasticity of a solid, allowing them to bond to various substrates with minimal pressure without undergoing a phase change. They are widely used in industries such as automotive, food and beverage packaging, electronics, and healthcare. Among various PSA types, acrylic PSA is the most widely used and consumed due to its simple processing, mature technology, and excellent overall performance.

[0003] However, traditional acrylic pressure-sensitive adhesives have the following defects: The need to consume non-renewable petrochemical resources has made the contradiction between the effective supply of petrochemical resources and the ever-increasing demand increasingly prominent; In addition, acrylic pressure-sensitive adhesives have poor high-temperature resistance. Under high-temperature conditions, the molecular chains of the pressure-sensitive adhesive are prone to relative movement, which reduces the modulus, cohesive strength and adhesive properties of the pressure-sensitive adhesive, and a large amount of residual adhesive is likely to appear on the surface of the adherend when peeling. 3) The above shortcomings greatly limit its application in high temperature environments such as high temperature resistant shielding, electronic component fixing and electronic component bonding.

[0004] Therefore, the present invention provides a method for preparing a high-temperature resistant biomass-based acrylate pressure-sensitive adhesive and a pressure-sensitive adhesive tape. The pressure-sensitive adhesive prepared by the method can have both excellent heat resistance and environmental friendliness. Summary of the Invention

[0005] In order to solve the technical problems that existing acrylic pressure-sensitive adhesives mainly rely on non-renewable petrochemical resources, have unsatisfactory high-temperature resistance and poor environmental protection, the present invention utilizes acrylic soft monomers from biomass resources in combination with other petroleum-based monomers to provide a high-temperature resistant biomass-based acrylic pressure-sensitive adhesive and a method for preparing a pressure-sensitive adhesive tape.

[0006] The present invention provides a method for preparing a high-temperature resistant biomass-based acrylate pressure-sensitive adhesive and a pressure-sensitive adhesive tape. The pressure-sensitive adhesive prepared by the method can have both good heat resistance and environmental friendliness.

[0007] A high-temperature resistant biomass-based acrylate pressure-sensitive adhesive, comprising the following components in parts by weight: 20-40 parts of biomass-based acrylate soft monomer; 20-40 parts of petroleum-based acrylate soft monomer; 10-20 parts of biomass-based acrylate hard monomer; 10-20 parts of functional monomer; Solvent ethyl acetate 70-120 parts; Initiator benzoyl peroxide 0.4-0.8 parts.

[0008] As a further improvement, the biomass-based acrylate soft monomer is either one or both of lauryl methacrylate and lauryl acrylate.

[0009] As a further improvement, the petroleum-based acrylate soft monomer is any one or more of isooctyl acrylate, butyl acrylate, and ethyl acrylate.

[0010] As a further improvement, the biomass-based acrylate hard monomer includes any one or more of isobornyl acrylate, tetrahydrofurfuryl acrylate, isobornyl methacrylate, and tetrahydrofurfuryl methacrylate.

[0011] As a further improvement, the functional monomer includes any one or more of acrylic acid, itaconic acid, glycidyl methacrylate, and hydroxypropyl methacrylate.

[0012] A method for preparing a high-temperature resistant biomass-based acrylate pressure-sensitive adhesive, characterized by comprising the following preparation steps: (1) Dissolve 0.1-0.3 parts of benzoyl peroxide in 10-20 parts of ethyl acetate to obtain a benzoyl peroxide solution, and set aside for use. Add 30-60 parts of ethyl acetate, 20-40 parts of biomass-based acrylate soft monomer, and 20-40 parts of petroleum-based acrylate soft monomer into a 500 mL three-necked flask, and heat to 78°C while stirring. When liquid reflux appears at the condenser, start adding the previously prepared benzoyl peroxide solution; (2) Then slowly add 10-20 parts of biomass-based acrylate hard monomer, 0.3-0.5 parts of benzoyl peroxide, 10-20 parts of functional monomer and 20-40 parts of ethyl acetate. After the addition is completed, heat to 100 ° C and continue to react for 3-6 hours. After cooling to room temperature, obtain biomass-based acrylate pressure-sensitive adhesive.

[0013] As a further improvement, in step (2), benzoyl peroxide is first dissolved in ethyl acetate, then uniformly mixed with the biomass-based acrylate hard monomer and functional monomer, and then slowly added dropwise to the reaction vessel within 80-100 minutes using a constant pressure dropping funnel.

[0014] A high-temperature resistant biomass-based acrylate pressure-sensitive adhesive tape comprising the following components in parts by weight: 200 parts of biomass-based acrylate pressure-sensitive adhesive; 1-10 parts of tackifying resin; 0.4-2 parts of cross-linking agent; Wherein, the tackifying resin is terpene resin.

[0015] As a further improvement, the cross-linking agent is aluminum acetylacetonate.

[0016] A method for preparing a high-temperature resistant biomass-based acrylate pressure-sensitive adhesive tape comprises the following steps: (1) Add 4-10 parts of tackifying resin and 0.4-2 parts of cross-linking agent to 200 parts of biomass-based acrylate pressure-sensitive adhesive, stir for 15 minutes, coat the mixture on a PET release film, and heat in an oven at 100°C for 1-2 hours to evaporate the solvent and unreacted monomers to obtain a biomass-based acrylate pressure-sensitive adhesive tape; (2) Attach the release paper to the adhesive surface to protect it, and use a rubber roller (2 kg) to roll it to make the release paper fit tightly to the adhesive surface for subsequent use.

[0017] The beneficial effects of the present invention are: 1) Environmentally friendly and sustainable: The present invention uses acrylic soft and hard monomers derived from renewable biomass resources. By adjusting the formula, the content of biomass-based monomers can reach more than 50%, reducing the use of petrochemical raw materials. The prepared biomass-based acrylic pressure-sensitive adhesive is non-toxic and environmentally friendly, showing good environmental sustainability.

[0018] 2) High temperature resistance: The present invention preferably uses a biomass-based hard monomer with a high temperature resistant structural unit, and compounding it with a preferred biomass-based soft monomer and a functional monomer, so that the pressure-sensitive adhesive has relatively balanced bonding properties and good high temperature resistance. At 80°C, its adhesion can reach more than 200 hours.

[0019] 3) Simple process conditions: The preparation method of the biomass-based acrylate pressure-sensitive adhesive developed in the present invention is simple and the preparation process is easy to control, which is conducive to ensuring the performance of the pressure-sensitive adhesive between different batches during large-scale production.

[0020] In summary, the present invention provides a high-temperature resistant, environmentally friendly and sustainable biomass-based acrylate pressure-sensitive adhesive and a method for preparing a pressure-sensitive tape, which solves the problems of existing acrylate pressure-sensitive adhesives that mainly rely on non-renewable petrochemical resources, have unsatisfactory high-temperature resistance and poor environmental performance, and shows broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is the molecular formula of lauryl methacrylate in the high-temperature resistant biomass-based acrylate pressure-sensitive adhesive of the present invention.

[0022] Figure 2 It is the molecular formula of methyl methacrylate in the high-temperature resistant biomass-based acrylate pressure-sensitive adhesive of the present invention.

[0023] Figure 3 It is the molecular formula of isobornyl methacrylate in the high-temperature resistant biomass-based acrylate pressure-sensitive adhesive of the present invention.

[0024] Figure 4 It is the molecular formula of glycidyl acrylate in the high-temperature resistant biomass-based acrylate pressure-sensitive adhesive of the present invention.

[0025] Figure 5 It is the molecular formula of isooctyl acrylate in the high-temperature resistant biomass-based acrylate pressure-sensitive adhesive of the present invention.

[0026] Figure 6 This is a real picture of the high-temperature resistant biomass-based acrylate pressure-sensitive adhesive of the present invention. DETAILED DESCRIPTION

[0027] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0028] Example 1 Preparation of pressure-sensitive adhesive: By mass, 0.1 parts of benzoyl peroxide was dissolved in 10 parts of ethyl acetate to obtain a benzoyl peroxide solution, which was set aside for use. 30 parts of ethyl acetate, 20 parts of lauryl methacrylate, and 20 parts of isooctyl acrylate were added to a 500 mL three-necked flask and heated to 78°C while stirring. When liquid reflux appeared at the condenser, the previously prepared benzoyl peroxide solution was added. Then, 10 parts of isobornyl methacrylate, 0.3 parts of benzoyl peroxide, 10 parts of glycidyl methacrylate, and 20 parts of ethyl acetate were added dropwise using a constant pressure dropping funnel within 80 minutes. After the addition was completed, the temperature was raised to 100°C and the reaction was continued for 6 hours. After cooling to room temperature, a biomass-based acrylate pressure-sensitive adhesive was obtained.

[0029] Preparation of pressure-sensitive adhesive tape: 4 parts of terpene resin and 0.4 parts of aluminum acetylacetonate were added to 200 parts of biomass-based acrylate pressure-sensitive adhesive. After stirring for 15 minutes, the mixture was coated on a PET release film and heated in a 100°C oven for 1 hour to evaporate the solvent and unreacted monomers. To protect the adhesive surface, release paper was attached to the adhesive surface and rolled with a 2 kg rubber roller to ensure a tight fit for subsequent use.

[0030] Example 2 Preparation of pressure-sensitive adhesive: By mass, 0.1 parts of benzoyl peroxide was dissolved in 10 parts of ethyl acetate to obtain a benzoyl peroxide solution, which was set aside for use. 40 parts of ethyl acetate, 30 parts of lauryl methacrylate, and 20 parts of isooctyl acrylate were added to a 500 mL three-necked flask and heated to 78°C while stirring. When liquid reflux appeared at the condenser, the previously prepared benzoyl peroxide solution was added. Then, 15 parts of isobornyl methacrylate, 0.4 parts of benzoyl peroxide, 15 parts of glycidyl methacrylate, and 30 parts of ethyl acetate were added dropwise using a constant pressure dropping funnel within 85 minutes. After the addition was completed, the temperature was raised to 100°C and the reaction was continued for 5 hours. After cooling to room temperature, a biomass-based acrylate pressure-sensitive adhesive was obtained.

[0031] Preparation of pressure-sensitive adhesive tape: 6 parts of terpene resin and 1 part of aluminum acetylacetonate were added to 200 parts of biomass-based acrylate pressure-sensitive adhesive. After stirring for 15 minutes, the mixture was coated on a PET release film and heated in an oven at 100°C for 1 hour to evaporate the solvent and unreacted monomers. To protect the adhesive surface, release paper was attached to the adhesive surface and rolled with a 2 kg rubber roller to ensure a tight fit for subsequent use.

[0032] Example 3 Preparation of pressure-sensitive adhesive: By mass, 0.2 parts of benzoyl peroxide were dissolved in 15 parts of ethyl acetate to obtain a benzoyl peroxide solution, which was set aside for use. 50 parts of ethyl acetate, 30 parts of lauryl methacrylate and 30 parts of isooctyl acrylate were added to a 500 mL three-necked flask and heated to 78°C while stirring. When liquid reflux appeared at the condenser, the previously prepared benzoyl peroxide solution was added. Then, 15 parts of isobornyl methacrylate, 0.3 parts of benzoyl peroxide, 20 parts of glycidyl methacrylate and 30 parts of ethyl acetate were added dropwise using a constant pressure dropping funnel within 90 minutes. After the addition was completed, the temperature was raised to 100°C and the reaction was continued for 5 hours. After cooling to room temperature, a biomass-based acrylate pressure-sensitive adhesive was obtained.

[0033] Preparation of pressure-sensitive adhesive tape: 6 parts of terpene resin and 1.6 parts of aluminum acetylacetonate were added to 200 parts of biomass-based acrylate pressure-sensitive adhesive. After stirring for 15 minutes, the mixture was coated on a PET release film and heated in a 100°C oven for 1.5 hours to evaporate the solvent and unreacted monomers. To prepare the biomass-based acrylate pressure-sensitive adhesive tape, release paper was attached to the adhesive surface to protect it. A 2 kg rubber roller was used to press the release paper against the adhesive surface for subsequent use.

[0034] Example 4 Preparation of pressure-sensitive adhesive: By mass, 0.3 parts of benzoyl peroxide was dissolved in 20 parts of ethyl acetate to obtain a benzoyl peroxide solution, which was set aside for use. 50 parts of ethyl acetate, 40 parts of lauryl methacrylate, and 30 parts of isooctyl acrylate were added to a 500 mL three-necked flask and heated to 78°C while stirring. When liquid reflux appeared at the condenser, the previously prepared benzoyl peroxide solution was added. Then, 20 parts of isobornyl methacrylate, 0.4 parts of benzoyl peroxide, 20 parts of glycidyl methacrylate, and 40 parts of ethyl acetate were added dropwise using a constant pressure dropping funnel within 95 minutes. After the addition was completed, the temperature was raised to 100°C and the reaction was continued for 4 hours. After cooling to room temperature, a biomass-based acrylate pressure-sensitive adhesive was obtained.

[0035] Preparation of pressure-sensitive adhesive tape: 8 parts of terpene resin and 0.4 parts of aluminum acetylacetonate were added to 200 parts of biomass-based acrylate pressure-sensitive adhesive. After stirring for 15 minutes, the mixture was coated on a PET release film and heated in a 100°C oven for 1.5 hours to evaporate the solvent and unreacted monomers. To protect the adhesive surface, release paper was attached to the adhesive surface and rolled with a 2 kg rubber roller to ensure a tight fit for subsequent use.

[0036] Example 5 Preparation of pressure-sensitive adhesive: By mass, 0.3 parts of benzoyl peroxide was dissolved in 20 parts of ethyl acetate to obtain a benzoyl peroxide solution, which was set aside for use. 60 parts of ethyl acetate, 40 parts of lauryl methacrylate, and 40 parts of isooctyl acrylate were added to a 500 mL three-necked flask and heated to 78°C while stirring. When liquid reflux appeared at the condenser, the previously prepared benzoyl peroxide solution was added. Then, 20 parts of isobornyl methacrylate, 0.5 parts of benzoyl peroxide, 20 parts of glycidyl methacrylate, and 40 parts of ethyl acetate were added dropwise using a constant pressure dropping funnel within 100 minutes. After the addition was completed, the temperature was raised to 100°C and the reaction was continued for 3 hours. After cooling to room temperature, a biomass-based acrylate pressure-sensitive adhesive was obtained.

[0037] Preparation of pressure-sensitive adhesive tape: 10 parts of terpene resin and 0.4 parts of aluminum acetylacetonate were added to 200 parts of biomass-based acrylate pressure-sensitive adhesive. After stirring for 15 minutes, the mixture was coated on a PET release film and heated in an oven at 100°C for 2 hours to evaporate the solvent and unreacted monomers. The biomass-based acrylate pressure-sensitive adhesive tape was obtained. To protect the adhesive surface, release paper was attached to the adhesive surface and rolled with a 2 kg rubber roller to ensure a tight fit between the release paper and the adhesive surface for subsequent use.

[0038] Comparative Example 1 Compared with Example 1, this comparative example differs in that lauryl methacrylate is replaced by isooctyl acrylate, and the remaining raw materials and processes are the same as those in Example 1.

[0039] Comparative Example 2 Compared with Example 1, this comparative example is different in that isooctyl acrylate is replaced by lauryl methacrylate, and the rest of the raw materials and processes are the same as those in Example 1.

[0040] Comparative Example 3 Compared with Example 1, this comparative example differs in that isobornyl methacrylate is replaced by methyl methacrylate, and the remaining raw materials and processes are the same as those in Example 1.

[0041] Comparative Example 4 Compared with Example 1, this comparative example is different in that no terpene resin is added, and the rest of the raw materials and processes are the same as those in Example 1.

[0042] Comparative Example 5 Compared with Example 1, this comparative example differs in that 1 terpene resin is replaced by rosin resin, and the rest of the raw materials and processes are the same as those in Example 1.

[0043] Comparative Example 6 This comparative example is different from Example 1 in that glycidyl methacrylate is not added, and the remaining raw materials and processes are the same as those in Example 1.

[0044] Performance Testing Initial tack, lasting tack and 180° peel strength tests: Tested in accordance with GB / T 4852-2002, GB / T 4851-1998 and GB / T 2792-1998 standards.

[0045] The solid content is determined by the following method: Weigh 1-2 g of the glue sample, place it in a drying oven at 120°C and dry it for three hours. After cooling, calculate its solid content; The results are shown in Table 1: It can be seen from the data in the above table that the biomass-based acrylate pressure-sensitive adhesives prepared by the method of the present invention in Examples 1-5 have more comprehensive bonding properties and good high temperature resistance compared to the comparative example, and the adhesion retention at 80°C is greater than 200 h. In addition, the hard monomers and some soft monomers used are all biomass resources. The prepared acrylate pressure-sensitive adhesives have a high biomass carbon content, which is in line with the concept of green environmental protection.

[0046] From the comparison of the experimental results of Comparative Example 1 and Example 1, it can be seen that when lauryl methacrylate is replaced by isooctyl acrylate, the initial tack of the prepared pressure-sensitive adhesive is greatly improved, while the sustained tack is greatly reduced. This is mainly due to the shorter molecular chain and higher flexibility of isooctyl acrylate. T gThe pressure-sensitive adhesive layer synthesized with this as a soft monomer has good wettability and fluidity, can quickly wet the micropores on the surface of the substrate, and exhibits excellent initial adhesion. However, due to its weak cohesive force, the pressure-sensitive adhesive's sustained adhesion is greatly reduced.

[0047] From the comparison of the experimental results of Comparative Example 2 and Example 1, it can be seen that when isooctyl acrylate is replaced by lauryl methacrylate, the initial tack of the prepared pressure-sensitive adhesive is greatly reduced, while the holding force is greatly improved. This is mainly because lauryl methacrylate has a high degree of entanglement between molecular chains due to its long-chain alkyl structure, high cohesive strength, and is not easy to wet the bonding surface, thereby exhibiting higher holding force and high temperature resistance, but poor initial tack.

[0048] From the comparison of the experimental results of Comparative Example 3 and Example 1, it can be seen that when isobornyl methacrylate is replaced by methyl methacrylate, the room temperature tackiness of the prepared pressure-sensitive adhesive does not change much, but the tackiness at 80°C decreases significantly. This is mainly because isobornyl methacrylate contains a cyclic isobornyl group, which has high rigidity and large steric hindrance, and can effectively inhibit the thermal motion of the molecular chain at high temperatures, giving the pressure-sensitive adhesive good high temperature resistance, so that it can still maintain good tackiness at high temperatures.

[0049] From the comparison of the experimental results of Comparative Example 4 and Example 1, it can be seen that without the addition of terpene resin, the initial tack of the prepared pressure-sensitive adhesive is reduced, while the sustained tack is improved. This is mainly because terpene resin, as a small molecule polymer, has good compatibility with acrylic monomers and can improve the wetting performance of the pressure-sensitive adhesive on the substrate surface, thereby improving its initial tack. However, it will also weaken the cohesive strength of the pressure-sensitive adhesive and cause a decrease in sustained tack. By adjusting the amount of terpene resin, the prepared pressure-sensitive adhesive has more balanced properties.

[0050] From the comparison of the experimental results of Comparative Example 5 and Example 1, it can be seen that when the terpene resin is replaced by rosin resin, the initial tack and room temperature tack of the prepared pressure-sensitive adhesive are similar, but the tack at 80°C is significantly reduced. This is mainly because the rosin acid in the rosin resin is easily oxidized and decomposed at high temperatures, releasing acidic substances, which may cause aging of the adhesive layer or residual adhesive problems, thereby resulting in a significant decrease in tack at high temperatures. Terpene resin has a higher softening point and good compatibility with acrylates, so the prepared pressure-sensitive adhesive has better tack at high temperatures.

[0051] Comparison of the experimental results of Comparative Example 6 with those of Example 1 shows that without the addition of glycidyl methacrylate, the initial tack of the prepared pressure-sensitive adhesive is significantly improved, but the sustained tack and 80°C sustained tack are significantly reduced. This is mainly because glycidyl methacrylate can undergo a ring-opening reaction under the action of a cross-linking agent and thermal catalysis, forming a cross-linked network that limits the slippage of the molecular chains and increases the cohesive strength, thereby significantly improving its high temperature resistance and sustained tack. However, the initial tack is also somewhat reduced.

[0052] Performance testing of the examples and comparative examples demonstrates that the biomass-based acrylate pressure-sensitive adhesives prepared using the method of the present invention exhibit excellent high-temperature resistance. The examples all maintained adhesion for over 200 hours at 80°C and exhibited relatively balanced adhesive properties, significantly outperforming the comparative examples. Furthermore, the pressure-sensitive adhesives of the present invention exhibited no adhesive residue during use and exhibited a high solids content.

[0053] The beneficial effects brought about by the technology of the present invention are mainly reflected in the following aspects: First, the use of biomass resources to replace traditional petrochemical resources significantly improves the environmental friendliness and sustainability of the adhesive; second, by optimizing the ratio of soft and hard monomers with unique structures and introducing tackifying resins, the pressure-sensitive adhesive has good high-temperature resistance and relatively comprehensive bonding properties, meeting the application scenarios that require high-temperature bonding performance; finally, the preparation process conditions are mild and easy to control, ensuring the stability and consistency of product quality.

[0054] In practical applications, the biomass-based acrylate pressure-sensitive adhesive of the present invention can not only be used in daily use fields such as food packaging, medical care, construction, and automobiles, but also has good application scenarios in high-temperature environments such as high-temperature shielding, electronic component fixation, and electronic component bonding. Moreover, due to its environmentally friendly characteristics and excellent bonding performance, it can meet the market's growing demand for high-performance, environmentally friendly adhesives, showing broad market application prospects.

[0055] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0056] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A high temperature resistant biomass-based acrylate pressure-sensitive adhesive, characterized by: The composition comprises the following components in parts by weight: 20-40 parts of biomass-based acrylate soft monomer; 20-40 parts of petroleum-based acrylate soft monomer; 10-20 parts of biomass-based acrylate hard monomer; 10-20 parts of functional monomer; Solvent ethyl acetate 70-120 parts; Initiator benzoyl peroxide 0.4-0.8 parts.

2. The high temperature resistant biomass-based acrylate pressure-sensitive adhesive according to claim 1, characterized in that: The biomass-based acrylate soft monomer is either one or both of lauryl methacrylate and lauryl acrylate.

3. The high temperature resistant biomass-based acrylate pressure-sensitive adhesive according to claim 1, characterized in that: The petroleum-based acrylate soft monomer is any one or more of isooctyl acrylate, butyl acrylate, and ethyl acrylate.

4. The high temperature resistant biomass-based acrylate pressure-sensitive adhesive according to claim 1, characterized in that: The biomass-based acrylate hard monomer includes any one or more of isobornyl acrylate, tetrahydrofurfuryl acrylate, isobornyl methacrylate, and tetrahydrofurfuryl methacrylate.

5. The high temperature resistant biomass-based acrylate pressure-sensitive adhesive according to claim 1, characterized in that: The functional monomers include any one or more of acrylic acid, itaconic acid, glycidyl methacrylate, and hydroxypropyl methacrylate.

6. A method for preparing the high-temperature resistant biomass-based acrylate pressure-sensitive adhesive according to any one of claims 1 to 5, characterized in that: The method comprises the following preparation steps: (1) Dissolve 0.1-0.3 parts of benzoyl peroxide in 10-20 parts of ethyl acetate to obtain a benzoyl peroxide solution, and set aside for use. Add 30-60 parts of ethyl acetate, 20-40 parts of biomass-based acrylate soft monomer, and 20-40 parts of petroleum-based acrylate soft monomer into a 500 mL three-necked flask, and heat to 78°C while stirring. When liquid reflux appears at the condenser, start adding the previously prepared benzoyl peroxide solution; (2) Then slowly add 10-20 parts of biomass-based acrylate hard monomer, 0.3-0.5 parts of benzoyl peroxide, 10-20 parts of functional monomer and 20-40 parts of ethyl acetate. After the addition is completed, heat to 100 ° C and continue to react for 3-6 hours. After cooling to room temperature, obtain biomass-based acrylate pressure-sensitive adhesive.

7. The method for preparing a high-temperature resistant biomass-based acrylate pressure-sensitive adhesive according to claim 6, characterized in that: In step 2), benzoyl peroxide is first dissolved in ethyl acetate, then uniformly mixed with the biomass-based acrylate hard monomer and functional monomer, and then slowly added dropwise to the reaction vessel within 80-100 minutes using a constant pressure dropping funnel.

8. A high temperature resistant biomass-based acrylate pressure-sensitive adhesive tape, characterized in that: The composition includes the following components in parts by mass: 200 parts of the biomass-based acrylate pressure-sensitive adhesive according to any one of claims 1 to 5; 1-10 parts of tackifying resin; 0.4-2 parts of cross-linking agent; Wherein, the tackifying resin is terpene resin.

9. The high temperature resistant biomass-based acrylate pressure-sensitive adhesive tape according to claim 8, characterized in that: The cross-linking agent is aluminum acetylacetonate.

10. A method for preparing the high-temperature resistant biomass-based acrylate pressure-sensitive adhesive tape according to any one of claims 8 or 9, characterized in that: The method comprises the following preparation steps: (1) Add 4-10 parts of tackifying resin and 0.4-2 parts of cross-linking agent to 200 parts of biomass-based acrylate pressure-sensitive adhesive, stir for 15 minutes, coat the mixture on a PET release film, and heat in an oven at 100°C for 1-2 hours to evaporate the solvent and unreacted monomers to obtain a biomass-based acrylate pressure-sensitive adhesive tape; (2) Attach the release paper to the adhesive surface to protect it, and use a rubber roller (2 kg) to roll it to make the release paper fit tightly to the adhesive surface for subsequent use.

Images