阅读说明：本技术 一种耐热抗寒的户外用压敏胶及其制备方法 (Heat-resistant cold-resistant outdoor pressure-sensitive adhesive and preparation method thereof ) 是由 廖平湘 于 2019-10-12 设计创作，主要内容包括：本发明公开了一种耐热抗寒的户外用压敏胶及其制备方法,具体涉及压敏胶技术领域,包括以下成分及其重量份：天然橡胶100-150份、增粘树脂100-150份、增塑剂30-50份、硫化剂5-10份、防老剂5-10份、软化剂10-20份、混合填料10-20份和钛白粉1-5份；所述增粘树脂具体为松香脂、萜烯树脂、马林酸树脂和水白树脂的混合物,所述软化剂具体为羊毛脂、卵磷脂、邻苯二甲酸二丁酯和甘油的混合物。本发明能够降低压敏胶黏剂的本体黏度,改善其对基材的密着性和涂布工艺,提高低温下的初黏性,提高了压敏胶的抗寒耐热能力,在恶劣的户外环境使用时不宜脱落。(The invention discloses a heat-resistant and cold-resistant outdoor pressure-sensitive adhesive and a preparation method thereof, and particularly relates to the technical field of pressure-sensitive adhesives, wherein the pressure-sensitive adhesive comprises the following components in parts by weight: 100-150 parts of natural rubber, 100-150 parts of tackifying resin, 30-50 parts of plasticizer, 5-10 parts of vulcanizing agent, 5-10 parts of anti-aging agent, 10-20 parts of softener, 10-20 parts of mixed filler and 1-5 parts of titanium dioxide; the tackifying resin is a mixture of rosin ester, terpene resin, maleic acid resin and water white resin, and the softening agent is a mixture of lanolin, lecithin, dibutyl phthalate and glycerin. The invention can reduce the body viscosity of the pressure-sensitive adhesive, improve the adherence of the pressure-sensitive adhesive to a base material and a coating process, improve the initial adhesion at low temperature, improve the cold resistance and heat resistance of the pressure-sensitive adhesive, and prevent the pressure-sensitive adhesive from falling off when used in severe outdoor environment.)

1. The heat-resistant cold-resistant outdoor pressure-sensitive adhesive is characterized by comprising the following components in parts by weight: 100-150 parts of natural rubber, 100-150 parts of tackifying resin, 30-50 parts of plasticizer, 5-10 parts of vulcanizing agent, 5-10 parts of anti-aging agent, 10-20 parts of softener, 10-20 parts of mixed filler and 1-5 parts of titanium dioxide;

the tackifying resin is a mixture of rosin ester, terpene resin, maleic acid resin and water white resin, and the softening agent is a mixture of lanolin, lecithin, dibutyl phthalate and glycerin.

2. The heat and cold resistant pressure sensitive adhesive for outdoor use according to claim 1, wherein: comprises the following components in parts by weight: 140 parts of natural rubber 110-140, 140 parts of tackifying resin 110-140, 35-45 parts of plasticizer, 6-8 parts of vulcanizing agent, 6-8 parts of anti-aging agent, 12-18 parts of softener, 12-18 parts of mixed filler and 2-4 parts of titanium dioxide.

3. The heat and cold resistant pressure sensitive adhesive for outdoor use according to claim 1, wherein: comprises the following components in parts by weight: 125 parts of natural rubber, 125 parts of tackifying resin, 40 parts of plasticizer, 7 parts of vulcanizing agent, 7 parts of anti-aging agent, 7 parts of softener, 15 parts of mixed filler and 3 parts of titanium dioxide.

4. A method for preparing a heat-resistant and cold-resistant pressure-sensitive adhesive for outdoor use according to any one of claims 1 to 3, comprising the following steps:

step one, adding 125 parts of natural rubber into a reaction kettle, stirring and heating to 75-85 ℃, continuing stirring for 5-10min, adding 125 parts of tackifying resin and 40 parts of plasticizer into the reaction kettle in sequence, cooling to 50 ℃, and stirring for 30-40min to prepare a mixed colloid A;

taking out the mixed colloid, placing the mixed colloid in a sealed container, sealing and standing the mixed colloid for 3 to 5 hours at room temperature, adding 3 parts of titanium dioxide into the mixed colloid, stirring the mixed colloid for 3 to 5 minutes by using a stirrer, pouring the stirred mixture into a reaction kettle, adding 7 parts of vulcanizing agent and 15 parts of softening agent into the reaction kettle, heating the mixture to 50 to 60 ℃, and stirring the mixture for 20 to 30 minutes to prepare a mixed colloid B;

dividing 7 parts of the anti-aging agent into A, B, C parts of mass equal parts, firstly adding A parts of the anti-aging agent into a mixed colloid B, uniformly stirring for 3 minutes at 50 ℃, then heating the mixed colloid B to 60 ℃, adding B parts of the anti-aging agent into the mixed colloid B, uniformly stirring for 10 minutes at 60 ℃, then cooling the mixed colloid to 30 ℃, then adding C parts of the anti-aging agent into the mixed colloid B, and uniformly stirring for 20 minutes to obtain a mixed colloid C;

and step four, heating the mixed colloid C to 40 ℃, adding 15 parts of mixed filler into the mixed colloid C, stirring at a constant speed for 30-50 minutes, cooling to normal temperature, and filtering to obtain the heat-resistant and cold-resistant outdoor pressure-sensitive adhesive.

5. The method for preparing the heat-resistant and cold-resistant pressure-sensitive adhesive for outdoor use according to claim 4, wherein the method comprises the following steps: tackifying resin: the mixing ratio of the rosin ester, the terpene resin, the maleic resin and the water white resin is 1: 3:1:1, and the viscosity of the tackifying resin is 250000-300000 mPas.

6. The method for preparing the heat-resistant and cold-resistant pressure-sensitive adhesive for outdoor use according to claim 4, wherein the method comprises the following steps: the plasticizer is phthalic acid ester, and the anti-aging agent is zinc ethyl phenyl dithiocarbamate or 4,4' -dioctyl diphenylamine.

7. The method for preparing the heat-resistant and cold-resistant pressure-sensitive adhesive for outdoor use according to claim 4, wherein the method comprises the following steps: the mixing ratio of the lanolin to the lecithin to the dibutyl phthalate to the glycerin is 1:1.5:2: 3.

8. The method for preparing the heat-resistant and cold-resistant pressure-sensitive adhesive for outdoor use according to claim 4, wherein the method comprises the following steps: the mixed filler is a mixture of silicon hydroxide, barium sulfate and talcum powder.

9. The method for preparing the heat-resistant and cold-resistant pressure-sensitive adhesive for outdoor use according to claim 4, wherein the method comprises the following steps: the stirring speed in the first step and the second step is 60 revolutions per minute, the stirring speed in the third step is 120 revolutions per minute, and the stirring speed in the fourth step is 150 revolutions per minute.

10. The method for preparing the heat-resistant and cold-resistant pressure-sensitive adhesive for outdoor use according to claim 4, wherein the method comprises the following steps: and the room temperature in the second step is 15-25 ℃.

Technical Field

The invention relates to the technical field of pressure-sensitive adhesives, in particular to a heat-resistant and cold-resistant outdoor pressure-sensitive adhesive and a preparation method thereof.

Background

The gluing (bonding, adhering, cementing, gluing) refers to a technique of connecting the surfaces of homogeneous or heterogeneous objects together by using an adhesive, and has the characteristics of continuous stress distribution, light weight, sealing, low temperature of most processes and the like. The glue joint is particularly suitable for connecting different materials, different thicknesses, ultrathin specifications and complex components. The glue joint has the fastest recent development and extremely wide application industry, and has great influence on the improvement of high-tech scientific and technical progress and the daily life of people. Therefore, it is very important to research, develop and produce various adhesives.

The pressure-sensitive adhesive is a short name of pressure-sensitive adhesives, is one of the adhesives, and has the characteristics of tight adhesion, difficult falling and cracking, small environmental pollution and the like. However, due to the different usage scenarios of pressure-sensitive adhesives, different requirements are imposed on the characteristics of pressure-sensitive adhesives. In some outdoor environments, the environment is severe, the performance requirement on the pressure-sensitive adhesive is high, the cold resistance and heat resistance of some traditional pressure-sensitive adhesives are insufficient, and the phenomenon that the pressure-sensitive adhesive falls off due to insufficient viscosity is easy to occur in the using process.

Disclosure of Invention

In order to overcome the defects of the prior art, the embodiment of the invention provides a heat-resistant and cold-resistant outdoor pressure-sensitive adhesive and a preparation method thereof.

In order to achieve the purpose, the invention provides the following technical scheme: the heat-resistant cold-resistant outdoor pressure-sensitive adhesive comprises the following components in parts by weight: 100-150 parts of natural rubber, 100-150 parts of tackifying resin, 30-50 parts of plasticizer, 5-10 parts of vulcanizing agent, 5-10 parts of anti-aging agent, 10-20 parts of softener, 10-20 parts of mixed filler and 1-5 parts of titanium dioxide;

the tackifying resin is a mixture of rosin ester, terpene resin, maleic acid resin and water white resin, and the softening agent is a mixture of lanolin, lecithin, dibutyl phthalate and glycerin.

In a preferred embodiment, the following ingredients and parts by weight thereof are included: 140 parts of natural rubber 110-140, 140 parts of tackifying resin 110-140, 35-45 parts of plasticizer, 6-8 parts of vulcanizing agent, 6-8 parts of anti-aging agent, 12-18 parts of softener, 12-18 parts of mixed filler and 2-4 parts of titanium dioxide.

In a preferred embodiment, the following ingredients and parts by weight thereof are included: 125 parts of natural rubber, 125 parts of tackifying resin, 40 parts of plasticizer, 7 parts of vulcanizing agent, 7 parts of anti-aging agent, 7 parts of softener, 15 parts of mixed filler and 3 parts of titanium dioxide.

A preparation method of a heat-resistant and cold-resistant outdoor pressure-sensitive adhesive specifically comprises the following steps:

step one, adding 125 parts of natural rubber into a reaction kettle, stirring and heating to 75-85 ℃, continuing stirring for 5-10min, adding 125 parts of tackifying resin and 40 parts of plasticizer into the reaction kettle in sequence, cooling to 50 ℃, and stirring for 30-40min to prepare a mixed colloid A;

taking out the mixed colloid, placing the mixed colloid in a sealed container, sealing and standing the mixed colloid for 3 to 5 hours at room temperature, adding 3 parts of titanium dioxide into the mixed colloid, stirring the mixed colloid for 3 to 5 minutes by using a stirrer, pouring the stirred mixture into a reaction kettle, adding 7 parts of vulcanizing agent and 15 parts of softening agent into the reaction kettle, heating the mixture to 50 to 60 ℃, and stirring the mixture for 20 to 30 minutes to prepare a mixed colloid B;

dividing 7 parts of the anti-aging agent into A, B, C parts of mass equal parts, firstly adding A parts of the anti-aging agent into a mixed colloid B, uniformly stirring for 3 minutes at 50 ℃, then heating the mixed colloid B to 60 ℃, adding B parts of the anti-aging agent into the mixed colloid B, uniformly stirring for 10 minutes at 60 ℃, then cooling the mixed colloid to 30 ℃, then adding C parts of the anti-aging agent into the mixed colloid B, and uniformly stirring for 20 minutes to obtain a mixed colloid C;

and step four, heating the mixed colloid C to 40 ℃, adding 15 parts of mixed filler into the mixed colloid C, stirring at a constant speed for 30-50 minutes, cooling to normal temperature, and filtering to obtain the heat-resistant and cold-resistant outdoor pressure-sensitive adhesive.

In a preferred embodiment, the mixing ratio of the rosin ester, the terpene resin, the maleic acid resin and the water white resin is 1: 3:1:1, and the viscosity of the tackifying resin is 250000-300000 mPas.

In a preferred embodiment, the plasticizer is in particular a phthalate and the anti-aging agent is in particular one of zinc ethylphenyldithiocarbamate and 4,4' -dioctyldiphenylamine.

In a preferred embodiment, the mixing ratio of lanolin, lecithin, dibutyl phthalate and glycerin is 1:1.5:2: 3.

In a preferred embodiment, the mixed filler is in particular a mixture of silicon hydroxide, barium sulphate and talc.

In a preferred embodiment, the stirring speed in the first step and the second step is 60 rpm, the stirring speed in the third step is 120 rpm, and the stirring speed in the fourth step is 150 rpm.

In a preferred embodiment, the room temperature in the second step is 15-25 ℃.

The invention has the technical effects and advantages that:

1. according to the invention, rosin ester, terpene resin, maleic acid resin and water white resin are used as tackifying resins, and the maleic acid resin, the water white resin and the terpene resin are mixed, so that the characteristics of better quick viscosity and peel strength of the terpene resin are kept, and good adhesion is achieved;

2. by using lanolin, lecithin, dibutyl phthalate and glycerin as softeners, the good compatibility of aromatic lubricating grease is kept, the low-temperature performance of aliphatic lubricating grease can be utilized, and when molecules of the aromatic lubricating grease and the aliphatic lubricating grease are uniformly dispersed among rubber macromolecules, the interaction force among rubber molecules can be reduced, so that the mutual sliding of the rubber molecules is promoted, the bulk viscosity of the pressure-sensitive adhesive can be reduced, the adhesion of the pressure-sensitive adhesive to a base material and a coating process are improved, the initial adhesion at low temperature is improved, and the heat and cold resistance of the pressure-sensitive adhesive is further improved;

3. the method has the advantages of simple process, low equipment requirement, strong operability and good social popularization and application.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.