Biodegradable polyurethane bonding material and preparation method thereof

Abstract

The invention discloses a biodegradable polyurethane binding material and a preparation method thereof, and the biodegradable polyurethane binding material comprises the following components based on the total mass of the raw materials in percentage by mass: 10%-40% of polyurethane resin, 6%-20% of water, 0.5%-2% of isocyanate, 0.5%-2% of polylactic acid, 0.2%-0.8% of polycaprolactone, 0.5%-2% of a reinforcing material and 0.5%-1% of a functional additive, according to the biodegradable polyurethane bonding material and the preparation method thereof, the influence on the environment is reduced, the biodegradable polyurethane bonding material is similar to common polyurethane, but some biodegradable components such as polylactic acid and polycaprolactone need to be added, and the biodegradable components can be mixed with polyurethane resin, so that the biodegradable polyurethane bonding material has the advantages that the environment is protected, and the service life of the biodegradable polyurethane bonding material is prolonged. The biodegradable polyurethane binding material has physical and chemical properties, such as high strength, high elasticity and the like, similar to those of common polyurethane, however, the biodegradable polyurethane binding material can be gradually decomposed under the action of microorganisms to finally generate low-molecular compounds, such as carbon dioxide and water.

Description

Technical Field

[0001] The invention relates to the technical field of polyurethane adhesive materials, in particular to a biodegradable polyurethane adhesive material and a preparation method thereof. Background Art

[0002] Polyurethane adhesive refers to an adhesive containing carbamate groups (-NHCOO-) or isocyanate groups (-NCO) in the molecular chain. Polyurethane adhesives are divided into two categories: polyisocyanates and polyurethanes. Polyisocyanate molecular chains contain isocyanate groups (-NCO) and carbamate groups (-NH-COO-), so polyurethane adhesives show high activity and polarity. It has excellent chemical adhesion to substrates containing active hydrogen, such as porous materials such as LED soft light strips, foam, plastic, wood, leather, fabric, paper, ceramics, and metal, glass, rubber, plastic and other materials with smooth surfaces. The domestic polyurethane adhesives that are better are PU adhesives from brands such as Jintong and Baizhuang.

[0003] According to the patent number published on the China Patent Network: CN104448743A, the present invention discloses a biodegradable material and a preparation method thereof, which uses corn fiber and plastic material as the main raw materials, and obtains biodegradable particles through granulation, dehydration cooling, and drying; or obtains biodegradable foaming material through internal mixing, open mixing, and oil pressure foaming. The biodegradable material uses biodegradable corn fiber as the main raw material, which changes the dependence of traditional plastic materials on petroleum, and can improve the problem that plastic and rubber materials are prone to produce toxic and unpleasant odors during the combustion process. At the same time, the biodegradable material has good antistatic, anti-slip and skin-friendly properties, and has no adverse effects on plants and soil after degradation. It can replace EVA, PVC, rubber and other materials to make shoes, floor mats, toys, bags and various plastic products, and has good application prospects.

[0004] The adhesive industry requires the use of polyurethane adhesive materials, but most of the polyurethane adhesive materials currently on the market have poor degradability, resulting in the polyurethane adhesive materials being unable to degrade quickly after long-term use, which affects the environment, affects the normal use of the polyurethane adhesive materials, and fails to bring convenience to users.

[0005] Therefore, it is necessary to design and modify the polyurethane adhesive material to effectively prevent the polyurethane adhesive material from being unable to degrade quickly after long-term use. Summary of the invention

[0006] In order to solve the problems raised in the above background technology, the purpose of the present invention is to provide a biodegradable polyurethane adhesive material and a preparation method thereof, which has the advantage of rapid degradation function and solves the problem that the polyurethane adhesive material cannot be rapidly degraded after long-term use.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a biodegradable polyurethane adhesive material and a preparation method thereof, wherein the mass percentage of each component based on the total mass of the raw materials is as follows: 10% to 40% of polyurethane resin, 6% to 20% of water, 0.5% to 2% of isocyanate, 0.5% to 2% of polylactic acid, 0.2% to 0.8% of polycaprolactone, 0.5% to 2% of reinforcing material, and 0.5% to 1% of functional additive.

[0008] As a preferred embodiment of the present invention, the reinforcing material consists of a cross-linking agent, a catalyst and an antioxidant.

[0009] As a preferred embodiment of the present invention, the mass percentages of the components of the total mass of the reinforcing material are as follows: 0.08% to 0.3% of the cross-linking agent, 0.1% to 0.4% of the catalyst, and 0.1% to 0.2% of the antioxidant.

[0010] As a preferred embodiment of the present invention, the crosslinking agent is a crosslinking agent of acrylic acid and styrene type ion exchange resin.

[0011] As a preferred embodiment of the present invention, the catalyst is a mixture of at least two of sulfate, alkali metal, ammonium sulfate, sodium sulfate and ferric sulfate.

[0012] As a preferred embodiment of the present invention, the antioxidant is composed of one or two of polyphenol compounds, flavonoids and anthocyanins.

[0013] As the present invention is preferred, comprising the following steps:

[0014] Step 1: weigh the raw materials according to the ratio and add them into a mixer, adjust the mixer speed to 800r / min for mixing;

[0015] Step 2: Preliminarily mix the materials required for the reinforcing material according to the ratio to obtain an appropriate amount of reinforcing material solution;

[0016] Step 3: Add the reinforcing material and the functional additive to the mixed raw materials, start the multi-functional mixer to fully mix them, and obtain a mixed material;

[0017] Step 4: Adjust the speed of the multifunctional mixer to 1200r / min and rotate for 20min until the materials are completely mixed;

[0018] Step 5: The manufactured polyurethane adhesive material is quantitatively filled and packaged through a quantitative filling machine, and a sealing test is performed after packaging.

[0019] As a preferred embodiment of the present invention, the multifunctional mixer is controlled to maintain a temperature of 65° C. for stirring, and has a high-efficiency temperature control function.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention provides a biodegradable polyurethane adhesive material and a preparation method thereof, which reduce the impact on the environment. The biodegradable polyurethane adhesive material is similar to ordinary polyurethane, but needs to add some biodegradable components, such as polylactic acid, polycaprolactone, etc. These components can be mixed with polyurethane resin to obtain a biodegradable polyurethane material. The biodegradable polyurethane adhesive material has physical and chemical properties similar to ordinary polyurethane, such as high strength, high elasticity, etc. However, they can be gradually decomposed under the action of microorganisms and eventually generate low molecular weight compounds, such as carbon dioxide and water. DETAILED DESCRIPTION

[0022] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] The invention provides a biodegradable polyurethane adhesive material and a preparation method thereof. The mass percentage of each component based on the total mass of raw materials is as follows: 10% to 40% of polyurethane resin, 6% to 20% of water, 0.5% to 2% of isocyanate, 0.5% to 2% of polylactic acid, 0.2% to 0.8% of polycaprolactone, 0.5% to 2% of reinforcing material and 0.5% to 1% of functional additive.

[0024] The present invention is further configured such that the reinforcing material consists of a cross-linking agent, a catalyst and an antioxidant.

[0025] The present invention is further configured such that the mass percentages of the components of the total mass of the reinforcing material are as follows: 0.08% to 0.3% of the cross-linking agent, 0.1% to 0.4% of the catalyst, and 0.1% to 0.2% of the antioxidant.

[0026] The present invention is further configured such that the crosslinking agent is a crosslinking agent of acrylic acid and styrene type ion exchange resin.

[0027] The present invention is further configured such that the catalyst is a mixture of at least two of sulfate, alkali metal, ammonium sulfate, sodium sulfate and iron sulfate.

[0028] The present invention is further configured that the antioxidant is composed of one or two of polyphenol compounds, flavonoids and anthocyanidins.

[0029] The present invention is further configured to include the following steps:

[0030] Step 1: Weigh the raw materials according to the ratio and add them into the mixer, adjust the mixer speed to 800r / min for mixing;

[0031] Step 2: Preliminarily mix the materials required for the reinforcement material according to the proportion to obtain an appropriate amount of reinforcement material solution;

[0032] Step 3: Add the reinforcing material and the functional additive to the mixed raw materials, start the multi-functional mixer to fully mix them, and obtain a mixed material;

[0033] Step 4: Adjust the speed of the multifunctional mixer to 1200r / min and rotate for 20min until the materials are completely mixed;

[0034] Step 5: The manufactured polyurethane adhesive material is quantitatively filled and packaged through a quantitative filling machine, and a sealing test is performed after packaging.

[0035] The present invention is further configured such that the control temperature of the multifunctional mixer is maintained at 65° C. for mixing, and has a high-efficiency temperature control function.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0037] Although 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 present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A biodegradable polyurethane adhesive material, It is characterized in that The mass percentage of each component based on the total mass of the raw materials is as follows: 10% to 40% of polyurethane resin, 6% to 20% of water, 0.5% to 2% of isocyanate, 0.5% to 2% of polylactic acid, 0.2% to 0.8% of polycaprolactone, 0.5% to 2% of reinforcing material, and 0.5% to 1% of functional additive.

2. A biodegradable polyurethane adhesive material according to claim 1, Features: The reinforcing material consists of a cross-linking agent, a catalyst and an antioxidant.

3. A biodegradable polyurethane adhesive material according to claim 1, Features: The mass percentages of the components of the total mass of the reinforcing material are as follows: 0.08% to 0.3% of a cross-linking agent, 0.1% to 0.4% of a catalyst, and 0.1% to 0.2% of an antioxidant.

4. A biodegradable polyurethane adhesive material according to claim 2, Features: The cross-linking agent is cross-linked by acrylic acid and styrene type ion exchange resin.

5. A biodegradable polyurethane adhesive material according to claim 2, Features: The catalyst is a mixture of at least two of sulfate, alkali metal, ammonium sulfate, sodium sulfate and ferric sulfate.

6. A biodegradable polyurethane adhesive material according to claim 2, Features: The antioxidant is composed of one or two of polyphenol compounds, flavonoids and anthocyanidins.

7. The method for preparing a biodegradable polyurethane adhesive material and a preparation method thereof according to claim 1, comprising the following steps: Step 1: weigh the raw materials according to the ratio and add them into a mixer, adjust the mixer speed to 800r / min for mixing; Step 2: Preliminarily mix the materials required for the reinforcing material according to the ratio to obtain an appropriate amount of reinforcing material solution; Step 3: Add the reinforcing material and the functional additive to the mixed raw materials, start the multi-functional mixer to fully mix them, and obtain a mixed material; Step 4: Adjust the speed of the multifunctional mixer to 1200r / min and rotate for 20min until the materials are completely mixed; Step 5: The manufactured polyurethane adhesive material is quantitatively filled and packaged through a quantitative filling machine, and a sealing test is performed after packaging.

8. A method for preparing a biodegradable polyurethane adhesive material according to claim 7, Features: The multifunctional mixer maintains a controlled temperature of 65°C for mixing, and has an efficient temperature control function.