阅读说明：本技术 一种低拉伸强度热熔胶及其制备方法及运用 (Low-tensile-strength hot melt adhesive and preparation method and application thereof ) 是由 邱文煜 温琳蕊 黄晓龙 王加建 于 2020-07-15 设计创作，主要内容包括：本发明公开了一种低拉伸强度热熔胶及其制备方法及运用,属于高分子材料领域。其技术要点包括如下重量份数的组分：矿物油100-240份；增粘树脂5-30份；低分子增韧剂10-50份；高分子聚异丁烯1-10份；抗氧化剂0.15-1份；辅助增稠剂5-10份,在受力较小的情况下具有良好的拉伸长度和易拉伸的优点。(The invention discloses a low-tensile-strength hot melt adhesive, a preparation method and application thereof, and belongs to the field of high polymer materials. The technical key points of the method are that the method comprises the following components in parts by weight: 100 portions and 240 portions of mineral oil; 5-30 parts of tackifying resin; 10-50 parts of a low-molecular toughening agent; 1-10 parts of high-molecular polyisobutylene; 0.15-1 part of antioxidant; 5-10 parts of auxiliary thickening agent, and has the advantages of good stretching length and easy stretching under the condition of small stress.)

1. The low-tensile-strength hot melt adhesive is characterized by comprising the following components in parts by weight:

100 portions and 240 portions of mineral oil;

5-30 parts of tackifying resin;

10-50 parts of a low-molecular toughening agent;

1-10 parts of high-molecular polyisobutylene;

0.15-1 part of antioxidant;

5-10 parts of auxiliary thickening agent.

2. The low-tensile-strength hot melt adhesive according to claim 1, further comprising 1-10 parts of wax, wherein the wax is one or more of paraffin wax, polyethylene wax or microcrystalline wax.

3. The low tensile strength hot melt adhesive of claim 1, wherein said mineral oil is predominantly naphthenic oil having a naphthenic hydrocarbon content of greater than 30%.

4. The low-tensile-strength hot-melt adhesive according to claim 1, wherein the auxiliary thickener is one or more of polyethylene or polypropylene.

5. The preparation method of the low-tensile-strength hot melt adhesive according to claims 1-4, characterized by comprising the following steps:

step one, cutting and crushing macromolecular polyisobutylene in corresponding weight parts, and screening by using a screen to obtain granular macromolecular polyisobutylene;

step two, heating to 140-;

adding auxiliary thickening agents in corresponding weight parts, uniformly stirring, then sequentially adding tackifying resin and antioxidant in corresponding weight parts, and uniformly stirring;

and step four, adding the low-molecular toughening agent in corresponding parts by weight, adding the mineral oil in corresponding parts by weight, reducing the temperature to 90-110 ℃, and uniformly stirring to obtain the product.

6. The method for preparing the low-tensile-strength hot melt adhesive according to claim 5, wherein the mesh number of the screen is more than 6 meshes.

7. The method for preparing the low-tensile-strength hot melt adhesive according to claim 5, wherein the weight ratio of the mineral oil to the high-molecular polyisobutylene in the second step is (15-25): 1.

8. the method for preparing the low-tensile-strength hot melt adhesive according to claim 6, wherein the weight ratio of the mineral oil to the high-molecular polyisobutylene in the second step is 20: 1.

9. the method for preparing the low-tensile-strength hot melt adhesive according to claim 5, wherein the weight of the low-molecular toughening agent and the mineral oil in the fourth step accounts for 20-30% of the total weight.

10. A mouse sticking board, which is characterized by comprising a board body, wherein the surface of the board body is provided with the hot melt adhesive according to the claims 1-4, and the hot melt adhesive further comprises 1-3 parts of bait.

Technical Field

The invention belongs to the field of high polymer materials, and particularly relates to a low-tensile-strength hot melt adhesive, and a preparation method and application thereof.

Background

The hot melt adhesive is a plastic adhesive, the physical state of which changes along with the change of temperature within a certain temperature range, and the chemical property of which is unchanged, is nontoxic and tasteless, and belongs to an environment-friendly chemical product. The product is solid, so the product is convenient to package, transport and store, and has no solvent, pollution and toxicity; and the production process is simple, the added value is high, the bonding length is large, the speed is high, and the like.

The invention discloses a logistics environment-friendly hot melt adhesive which can be attached at low temperature, a preparation method and application thereof in Chinese invention patent with publication number CN108795351A, wherein the hot melt adhesive is prepared from 10-30% of naphthenic oil, 15-35% of high molecular polymer, 5-25% of low molecular toughening agent, 5-20% of liquid tackifying resin, 30-60% of tackifying resin and 0.2-0.8% of antioxidant. The hot melt adhesive disclosed by the invention is an environment-friendly hot melt adhesive which is applied to express PE seal at a low temperature of as low as-10 ℃, applied to a logistics waybill at a low temperature of as low as-15 ℃, applied to a logistics back adhesive bag at a low temperature of as low as-15 ℃, applied to express documents seal at a low temperature of as low as-20 ℃ and lower than the application temperature of a traditional SBC formula by 10 ℃.

However, the hot melt adhesive of the above invention has a high tensile strength in practical use, and is difficult to stretch, and thus cannot meet the requirements in specific situations.

Therefore, there is a need to propose a new solution to prepare low tensile strength hot melt adhesives.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the advantages of good stretching length and easy stretching under the condition of small stress.

The second purpose of the present invention is to provide a preparation method of a low tensile strength hot melt adhesive, which is used for preparing the hot melt adhesive.

The struggled mouse stretches the hot melt adhesive, the feet of the mouse can be wound by the stretched hot melt adhesive and stumbled, more outer surfaces of the mouse are in contact with the mouse sticking plate, and the mouse sticking plate can firmly stick the mouse.

In order to achieve the first purpose, the invention provides the following technical scheme:

the low-tensile-strength hot melt adhesive is characterized by comprising the following components in parts by weight: 100 portions and 240 portions of mineral oil; 5-30 parts of tackifying resin; 10-50 parts of a low-molecular toughening agent; 1-10 parts of high-molecular polyisobutylene; 0.15-1 part of antioxidant; 5-10 parts of auxiliary thickening agent.

By adopting the technical scheme, the high-molecular polyisobutylene is a typical saturated linear polymer and has ideal chemical stability, good waterproofness and air tightness, and is dissolved in the mineral oil to play roles in reducing the tensile strength of the hot melt adhesive and improving the tensile length of the hot melt adhesive.

More preferably, the wax also comprises 1-10 parts of wax, and the wax is one or more of paraffin wax, polyethylene wax or microcrystalline wax.

By adopting the technical scheme, the heat resistance of the hot melt adhesive can be improved and the fluidity of the hot melt adhesive can be reduced by adding the wax and crystallizing the wax.

Further preferably, the mineral oil is predominantly naphthenic oil with a naphthenic content of more than 30%.

By adopting the technical scheme, the naphthenic oil is used as a solvent, so that the high-molecular polyisobutylene and the low-molecular toughening agent can be dispersed in the hot melt adhesive, and the naphthenic oil has excellent low-temperature performance: high viscosity and low pour point, and can well enhance the mechanical property and cold resistance of the heat-filling hot melt adhesive when being filled into the hot melt adhesive.

More preferably, the tackifying resin is one of hydrogenated carbon five resin, hydrogenated DCPD, modified carbon five resin, carbon five/carbon nine copolymer resin or modified rosin.

Further preferably, the auxiliary thickener is one or more of polyethylene or polypropylene.

By adopting the technical scheme, the auxiliary thickening agent is added, so that the consistency of the hot melt adhesive can be improved, and the bonding performance of the hot melt adhesive is better.

Further, the low-molecular toughening agent is low-molecular polyisobutylene.

By adopting the technical scheme, the low-molecular polyisobutylene is Newtonian fluid, has a high viscosity index and good compatibility with mineral oil, and can play a role in improving the viscosity of the hot melt adhesive.

Further, the antioxidant is one or more of antioxidant 1010, antioxidant 168 and antioxidant 627.

A preparation method of a low-tensile-strength hot melt adhesive comprises the following steps:

step one, cutting and crushing macromolecular polyisobutylene in corresponding weight parts, and screening by using a screen to obtain granular macromolecular polyisobutylene;

step two, heating to 140-;

adding auxiliary thickening agents in corresponding weight parts, uniformly stirring, then sequentially adding tackifying resin and antioxidant in corresponding weight parts, and uniformly stirring;

and step four, adding the low-molecular toughening agent in corresponding parts by weight, adding the mineral oil in corresponding parts by weight, reducing the temperature to 90-110 ℃, and uniformly stirring to obtain the product.

Through adopting above-mentioned technical scheme, because polymer polyisobutylene solubility is lower, through stripping and slicing, breakage before the production hot melt adhesive for polymer polyisobutylene becomes graininess, and the polymer polyisobutylene dispersion of being convenient for produces in the mineral oil with graininess polymer polyisobutylene dispersion again, makes the tensile length of hot melt adhesive of producing longer.

More preferably, the mesh number of the screen is larger than 6 meshes.

Through adopting above-mentioned technical scheme, the mesh number of screen cloth is greater than 6 meshes, has restricted the size of the polymer polyisobutylene through the screen cloth for polymer polyisobutylene can be even dispersion in mineral oil, when the mesh number of screen cloth is less than 6 meshes, makes the tensile strength of hot melt adhesive rise, thereby guarantees the low tensile strength of hot melt adhesive through control screen cloth mesh number.

More preferably, the weight ratio of the mineral oil to the high-molecular polyisobutylene in the second step is (15-25): 1.

by adopting the technical scheme, the ratio of the high-molecular polyisobutylene to the mineral oil is controlled, and if the consumption of the high-molecular polyisobutylene is too high, the tensile strength of the hot melt adhesive is higher, so that the production cost is increased, the resource waste is caused, and the tensile length of the hot melt adhesive is reduced; if the use amount of the high-molecular polyisobutylene is too small, the tensile strength of the hot melt adhesive is low, so that the tensile length of the hot melt adhesive is reduced, and the quality of the hot melt adhesive is influenced.

More preferably, the weight ratio of the mineral oil to the high-molecular polyisobutylene in the second step is 20: 1.

more preferably, the weight of the low molecular weight toughening agent and the mineral oil in the fourth step accounts for 20-30% of the total weight.

By adopting the technical scheme, the using amount of the low-molecular toughening agent is controlled, and if the using amount of the low-molecular toughening agent is too high, the toughness of the hot melt adhesive cannot be continuously improved, so that the waste of resources is caused, and the production cost is increased; if the amount of the low-molecular toughening agent is too small, the toughness of the hot melt adhesive is poor, and the quality of the hot melt adhesive is affected.

A mouse sticking plate comprises a plate body, wherein hot melt adhesive is arranged on the surface of the plate body, and 1-3 parts of bait is also included in the hot melt adhesive.

By adopting the technical scheme, the hot melt adhesive has good tensile length and low tensile strength, so that the pulled hot melt adhesive is easy to form threads, adheres to and winds the body of a mouse, and improves the difficulty of the mouse escaping from the mouse sticking plate; the addition of the bait can improve the mouse catching rate of the mouse sticking plate.

Further preferably, the bait is an essence.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the high molecular polyisobutylene is a typical saturated linear polymer and has ideal chemical stability, good waterproofness and air tightness, and has the effects of reducing the tensile strength of the hot melt adhesive and improving the tensile length of the hot melt adhesive by dissolving the high molecular polyisobutylene in mineral oil;

2. the heat resistance of the hot melt adhesive can be improved and the fluidity of the hot melt adhesive can be reduced by adding the wax and crystallizing the wax;

3. the mesh number through the screen cloth is greater than 6 meshes, the size of the high polymer polyisobutylene passing through the screen cloth is limited, the high polymer polyisobutylene can be uniformly dispersed in the mineral oil, and when the mesh number of the screen cloth is less than 6 meshes, the tensile strength of the hot melt adhesive is increased, so that the low tensile strength of the hot melt adhesive is ensured by controlling the mesh number of the screen cloth.

Detailed Description

The following examples describe the invention in detail.

The raw material sources of the following examples and preparations are shown in table 1:

TABLE 1