阅读说明：本技术 一种含有复配抗氧剂的耐老热熔胶 (Anti-aging hot melt adhesive containing compound antioxidant ) 是由 陈刚 夏鹏宇 于 2020-07-20 设计创作，主要内容包括：本发明属于高分子粘结剂技术领域,具体的说是一种含有复配抗氧剂的耐老热熔胶,包括枪体、加热管和酒精罐；所述枪体内开设有第一空腔；所述第一空腔“L”形设计；所述第一空腔位于枪体底部开设有第一通槽；所述第一通槽与外界导通；所述第一通槽内安装有密封塞；所述第一空腔“L”形交界处固连有限位片；所述限位片上固连有连接盖；所述连接盖朝向第一通槽一侧开设有连接槽；所述连接槽侧壁螺纹设计；所述第一空腔位于限位片远离酒精罐一侧侧壁固连有均匀分布的限位板；本发明通过将聚乙烯醇缩丁醛涂刷在挤出制备的热熔胶棒表面一层高熔点的保护膜,可以有效的防止低熔点的热熔胶棒在温度较高的环境中使用时,表面产生发黏现象。(The invention belongs to the technical field of high-molecular adhesives, and particularly relates to an anti-aging hot melt adhesive containing a compound antioxidant, which comprises a gun body, a heating pipe and an alcohol tank; a first cavity is formed in the gun body; the first cavity is in an L-shaped design; the first cavity is positioned at the bottom of the gun body and is provided with a first through groove; the first through groove is communicated with the outside; a sealing plug is arranged in the first through groove; the L-shaped junction of the first cavity is fixedly connected with a limiting piece; the limiting piece is fixedly connected with a connecting cover; one side of the connecting cover, which faces the first through groove, is provided with a connecting groove; the side wall of the connecting groove is in a threaded design; the side wall of the first cavity, which is positioned at one side of the limiting sheet away from the alcohol tank, is fixedly connected with uniformly distributed limiting plates; according to the invention, the polyvinyl butyral is coated on the surface of the hot melt adhesive rod prepared by extrusion to form a layer of high-melting-point protective film, so that the phenomenon of surface stickiness of the low-melting-point hot melt adhesive rod when the low-melting-point hot melt adhesive rod is used in an environment with higher temperature can be effectively prevented.)

1. An aging-resistant hot melt adhesive containing a compound antioxidant is characterized in that: the anti-aging hot melt adhesive containing the compound antioxidant is prepared from the following raw materials:

25-30 parts of EVA resin, 5-6 parts of polyvinyl butyral, 12-14 parts of absolute ethyl alcohol, 0.5-0.8 part of quartz sand, 2-4 parts of microcrystalline paraffin, 4-5 parts of rosin, 0.5-0.8 part of lauric acid, 0.5-0.8 part of triphosphite and 0.3-0.6 part of antioxidant CY;

the preparation method of the anti-aging hot melt adhesive containing the compound antioxidant comprises the following steps:

s1: placing the EVA resin in a reaction kettle, controlling the temperature in the reaction kettle to quickly rise to 100-120 ℃ at the speed of 1-2 ℃/S, keeping the temperature and stirring for 5-8min after the temperature rise is finished, uniformly adding triphosphite powder into the molten colloid while stirring, and keeping the temperature and reacting for 3-5min after the addition is finished;

s2: sequentially adding quartz sand, microcrystalline paraffin, rosin, lauric acid and an antioxidant CY into a reaction kettle, continuously stirring the reaction kettle in the adding process, controlling the stirring speed to be 60-80r/min, and stirring and blending the mixture for 5-8min after the adding is finished to prepare a hot melt adhesive base material;

s3: introducing the hot melt adhesive base material prepared in the step S2 into a double-screw extruder, controlling the extrusion temperature of the double-screw extruder to be 80-90 ℃, carrying out melt blending extrusion for 3-5 times, and then carrying out granulation to prepare master batches;

s4: dissolving polyvinyl butyral in an absolute ethyl alcohol solution, introducing master batches into a single-screw extruder, carrying out melt blending extrusion to obtain a crude glue stick, uniformly coating the absolute ethyl alcohol solution in which the polyvinyl butyral is dissolved on the surface of the extruded hot melt glue stick, and repeatedly brushing for 2-3 times until the crude glue stick is cooled to normal temperature;

s5: and feeding the cooled rough glue stick into a grinding machine to carry out surface polishing and grinding to obtain a hot melt glue stick, inserting the hot melt glue stick into a hot melt gun when in use, and heating and dissolving the hot melt glue stick in an alcohol atmosphere to coat the hot melt glue stick on a part to be adhered.

2. The compound antioxidant-containing aging-resistant hot melt adhesive according to claim 1, which is characterized in that: wherein the rosin in the raw material is modified hydrogenated rosin which is obtained by heating poloxamer and hydrogenated rosin, grinding and adding microcrystalline cellulose for modification treatment.

3. The compound antioxidant-containing aging-resistant hot melt adhesive according to claim 1, which is characterized in that: the hot melting gun in the S5 comprises a gun body (1), a heating pipe (2) and an alcohol tank (3); a first cavity is formed in the gun body (1); the first cavity is in an L-shaped design; the first cavity is positioned at the bottom of the gun body (1) and is provided with a first through groove; the first through groove is communicated with the outside; a sealing plug (11) is arranged in the first through groove; the L-shaped junction of the first cavity is fixedly connected with a limiting piece (12); the limiting sheet (12) is fixedly connected with a connecting cover (13); one side of the connecting cover (13) facing the first through groove is provided with a connecting groove; the side wall of the connecting groove is in a threaded design; the alcohol tank (3) is in threaded connection with the connecting cover (13) through a connecting groove; the side wall of the first cavity, which is positioned at one side of the limiting sheet (12) far away from the alcohol tank (3), is fixedly connected with uniformly distributed limiting plates; the limiting plate is provided with a second through groove; the second through groove extends in two directions to penetrate through the gun body (1) and extend to the outside; the heating pipe (2) is arranged at one end of the second through groove, which is far away from the alcohol tank (3); the heating pipe (2) is in a conical design at one end far away from the alcohol tank (3); the heating pipe (2) is positioned in the second through groove and is in a cross-shaped design; a ceramic pipe (4) is sleeved at one end of the heating pipe (2) close to the alcohol tank (3); a guide pipe (41) is sleeved on one side of the ceramic pipe (4) far away from the heating pipe (2); the first cavity is positioned above the limiting sheet (12) and is provided with a first sliding chute; a moving pipe (42) is connected in the first sliding chute in a sliding way; the second through groove extends into the moving pipe (42); the moving pipe (42) is positioned below the second through groove and is provided with a clamping groove; a clamping block (43) is rotationally connected in the clamping groove; one end of the clamping block (43) extends into the second through groove, and the other end of the clamping block extends into the first cavity; a handle of the gun body (1) is provided with a rotating groove; the rotating groove is communicated with the first cavity; a rotating handle (44) is rotatably connected in the rotating groove through a guide rod; the rotation handle (44) extends into the first cavity; one end of the rotating handle (44) positioned in the first cavity is hinged with the clamping block (43) through a connecting plate; an inflatable bag (45) is fixedly connected in the rotating groove; the inflatable bag (45) extends into the connecting cover (13) through a one-way conduit and is communicated with the alcohol tank (3); the connecting cover (13) is fixedly connected with a connecting pipe (46); the outer wall of the ceramic tube (4) is fixedly connected with a jet ring (47); one end of the connecting pipe (46) far away from the connecting cover (13) extends into the injection ring (47); one side of the injection ring (47) close to the ceramic tube (4) is provided with a one-way guide hole; the single guide hole closed design in the initial state.

4. The anti-aging hot melt adhesive containing the compound antioxidant as claimed in claim 3, is characterized in that: the ceramic tube (4) is internally designed in a step shape; a driven ring (5) is connected in the ceramic tube (4) in a sliding manner; one side, close to the step shape of the ceramic tube (4), of the driven ring (5) is elastically connected with the ceramic tube (4) through a spring; the inner wall of the driven ring (5) is designed to be inclined.

5. The anti-aging hot melt adhesive containing the compound antioxidant as claimed in claim 3, is characterized in that: a second sliding chute is formed in the ceramic tube (4); a sliding plate (51) is connected in the second sliding chute in a sliding manner; the one-way guide hole extends into the second sliding groove; one side of the sliding plate (51) close to the driven ring (5) is fixedly connected with a transmission rod (52); the transmission rod (52) extends to the movement path of the driven ring (5).

6. The anti-aging hot melt adhesive containing the compound antioxidant as claimed in claim 3, is characterized in that: a plurality of heat dissipation plates (53) are fixedly connected to the outer side of the ceramic tube (4); the heat dissipation plates (53) are all in an I-shaped design; the heat dissipation plate (53) is closely attached to the injection ring (47).