Cable flame-retardant adhesive and preparation method thereof

Abstract

The invention relates to the field of cable adhesives, in particular to a cable flame-retardant adhesive and a preparation method thereof. The adhesive comprises the following raw material components: 30-45% of saturated polyester resin, 5-10% of high-temperature-resistant epoxy resin, 1-5% of tackifying resin, 10-20% of a flame retardant, 0.1-1% of a coupling agent, 0.01-0.1% of a catalyst, 0.1-1% of an anti-hydrolysis agent, 0.1-1% of a high-temperature-resistant curing agent, 0.1-1% of a flexibilizer, 1-5% of a filler and 0.1-1% of a heat-resistant oxygen agent. The invention aims to provide the cable flame-retardant adhesive so as to reduce the catalytic degradation activity of metal ions and improve the high temperature resistance of the adhesive; the second purpose of the invention is to provide the cable flame-retardant adhesive and the preparation method thereof, so that the stability of the adhesive is improved.

Description

Technical Field

[0001] The invention relates to the field of cable adhesives, and in particular to a flame retardant cable adhesive and a preparation method thereof. Background Art

[0002] Cables are usually rope-like cables made of several or several groups of wires (at least two wires in each group). Each group of wires is insulated from each other and often twisted around a center. The entire core wire is extruded or coated with a highly insulating covering layer, insulating layer, oxygen barrier layer, etc. For cable production, adhesives are an indispensable material; common and practical adhesives mainly include phenolic resin adhesives, heat-resistant epoxy adhesives, silicone adhesives, etc.

[0003] With the continuous acceleration of economic construction, the number of various large-scale industrial facilities, high-rise commercial buildings, underground buildings and residential buildings has gradually increased. Among them, the demand for cables in the new energy vehicle industry has gradually increased, and higher requirements have been put forward for cables. Because the existing adhesives are prone to high-temperature catalytic thermal oxidation degradation reactions of organic polymers when in high-temperature contact with metal ions such as copper ions and iron ions, causing cross-sectional bonding damage, resulting in a high cable replacement rate and a low service life.

[0004] Therefore, how to design a cable flame retardant adhesive and a preparation method thereof that can solve the above technical problems is a technical problem that needs to be solved. Summary of the invention

[0005] In order to solve the above problems, the first object of the present invention is to provide a cable flame retardant adhesive to reduce the catalytic degradation activity of metal ions and improve the high temperature resistance of the adhesive; the second object of the present invention is to provide a cable flame retardant adhesive and a preparation method thereof to increase the stability of the adhesive.

[0006] To achieve the above object, the present invention adopts the following technical solution: the adhesive comprises the following raw material components by mass percentage:

[0007] Saturated polyester resin 30-45%;

[0008] High temperature resistant epoxy resin 5-10%;

[0009] Tackifying resin 1-5%;

[0010] Flame retardant 10-20%;

[0011] Coupling agent 0.1-1%;

[0012] Catalyst 0.01-0.1%;

[0013] Anti-hydrolysis agent 0.1-1%;

[0014] High temperature resistant curing agent 0.1-1%;

[0015] Toughener 0.1-1%;

[0016] Filler 1-5%;

[0017] Thermal oxidation inhibitor 0.1-1%;

[0018] Solvent Residue

[0019] The high temperature resistant epoxy resin includes phenolic epoxy resin and alicyclic epoxy resin. The number average molecular weight of the phenolic epoxy resin is 2000-4000 and the glass transition temperature is 15-30°C. The number average molecular weight of the alicyclic epoxy resin is 1000-2000 and the glass transition temperature is -10-10°C. The dosage mass of the phenolic epoxy resin is greater than that of the alicyclic epoxy resin.

[0020] Further, the flame retardant includes one or more of phosphorus flame retardants, nitrogen flame retardants, silicon flame retardants, metal hydroxide flame retardants, metal oxide flame retardants, and metal boride flame retardants;

[0021] The coupling agent includes one or more of a titanate coupling agent, an aluminate coupling agent, an organic silane coupling agent, an organic chromium complex coupling agent, and a borate coupling agent;

[0022] The catalyst includes an organic amine catalyst and / or an organic metal salt catalyst;

[0023] The anti-hydrolysis agent includes monocarbodiimide and / or polycarbodiimide;

[0024] The high temperature resistant curing agent includes isocyanate;

[0025] The toughening agent includes liquid polysulfide rubber and / or liquid nitrile rubber;

[0026] The filler includes ultra-fine pure aluminum powder and / or silicon powder;

[0027] The thermal oxidation inhibitor includes a metal separation chelating agent

[0028] 1. Further, the operation steps are:

[0029] Step 1: Mix the phenolic epoxy resin and the alicyclic epoxy resin, heat to 210°C and maintain 210°C for 24 hours;

[0030] Step 2: Add saturated polyester resin to high temperature resistant epoxy resin and keep it at 210°C for 6 hours;

[0031] Step 3: adding a flame retardant to the mixed solution and cooling the mixture to 90°C-100°C to generate a slurry;

[0032] Step 4: Finally, a coupling agent, a catalyst, an anti-hydrolysis agent, a high temperature resistant curing agent, a toughening agent, a filler and an anti-thermal oxidation agent are added to the slurry to prepare an adhesive.

[0033] The present invention has the following beneficial effects:

[0034] 1- The present invention reduces the activity of metal ions by adding metal ion chelating agents to the mixed solution, thereby avoiding the thermal oxidation degradation reaction of organic polymers outside the cable catalyzed by iron and copper metal ions at high temperatures, and avoiding the bonding damage of the contact surface as much as possible, so as to improve the utilization rate of the cable.

[0035] 2- The present invention adds ultrafine pure aluminum powder, silicon powder, etc. during the preparation process of the adhesive, which improves the heat resistance to a certain extent and significantly improves the bonding strength of the adhesive. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below with reference to specific embodiments:

[0037] Embodiment 1

[0038] In this solution, the adhesive comprises the following raw material components by mass percentage:

[0039] Saturated polyester resin 30-45%;

[0040] High temperature resistant epoxy resin 5-10%;

[0041] Tackifying resin 1-5%;

[0042] Flame retardant 10-20%;

[0043] Coupling agent 0.1-1%;

[0044] Catalyst 0.01-0.1%;

[0045] Anti-hydrolysis agent 0.1-1%;

[0046] High temperature resistant curing agent 0.1-1%;

[0047] Toughener 0.1-1%;

[0048] Filler 1-5%;

[0049] Thermal oxidation inhibitor 0.1-1%;

[0050] Solvent Residue

[0051] The high temperature resistant epoxy resin includes phenolic epoxy resin and alicyclic epoxy resin. The number average molecular weight of the phenolic epoxy resin is 2000-4000 and the glass transition temperature is 15-30°C. The number average molecular weight of the alicyclic epoxy resin is 1000-2000 and the glass transition temperature is -10-10°C. The dosage mass of the phenolic epoxy resin is greater than that of the alicyclic epoxy resin.

[0052] The flame retardant includes one or more of phosphorus flame retardants, nitrogen flame retardants, silicon flame retardants, metal hydroxide flame retardants, metal oxide flame retardants, and metal boride flame retardants;

[0053] The coupling agent includes one or more of a titanate coupling agent, an aluminate coupling agent, an organic silane coupling agent, an organic chromium complex coupling agent, and a borate coupling agent;

[0054] The catalyst includes an organic amine catalyst and / or an organic metal salt catalyst;

[0055] The anti-hydrolysis agent includes monocarbodiimide and / or polycarbodiimide;

[0056] The high temperature resistant curing agent includes isocyanate;

[0057] The toughening agent includes liquid polysulfide rubber and / or liquid nitrile rubber;

[0058] The filler includes ultra-fine pure aluminum powder and / or silicon powder;

[0059] The thermal oxidation inhibitor includes a metal chelating agent.

[0060] Embodiment 2

[0061] Step 1: Mix the phenolic epoxy resin and the alicyclic epoxy resin, heat to 210°C and maintain 210°C for 24 hours;

[0062] Step 2: Add saturated polyester resin to high temperature resistant epoxy resin and keep it at 210°C for 6 hours;

[0063] Step 3: adding a flame retardant to the mixed solution and cooling the mixture to 90°C-100°C to generate a slurry;

[0064] Step 4: Finally, a coupling agent, a catalyst, an anti-hydrolysis agent, a high temperature resistant curing agent, a toughening agent, a filler and an anti-thermal oxidation agent are added to the slurry to prepare an adhesive.

[0065] The above description is only a specific implementation mode of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made by using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A flame retardant adhesive for cables, characterized in that: The adhesive comprises the following raw material components by mass percentage: Saturated polyester resin 30-45%; High temperature resistant epoxy resin 5-10%; Tackifying resin 1-5%; Flame retardant 10-20%; Coupling agent 0.1-1%; Catalyst 0.01-0.1%; Anti-hydrolysis agent 0.1-1%; High temperature resistant curing agent 0.1-1%; Toughener 0.1-1%; Filler 1-5%; Thermal antioxidant 0.1-1%; Solvent Residue The high temperature resistant epoxy resin includes phenolic epoxy resin and alicyclic epoxy resin. The number average molecular weight of the phenolic epoxy resin is 2000-4000 and the glass transition temperature is 15-30°C. The number average molecular weight of the alicyclic epoxy resin is 1000-2000 and the glass transition temperature is -10-10°C. The dosage mass of the phenolic epoxy resin is greater than that of the alicyclic epoxy resin.

2. The flame retardant adhesive for cables according to claim 1, characterized in that: The flame retardant includes one or more of phosphorus flame retardants, nitrogen flame retardants, silicon flame retardants, metal hydroxide flame retardants, metal oxide flame retardants, and metal boride flame retardants; The coupling agent includes one or more of a titanate coupling agent, an aluminate coupling agent, an organic silane coupling agent, an organic chromium complex coupling agent, and a borate coupling agent; The catalyst includes an organic amine catalyst and / or an organic metal salt catalyst; The anti-hydrolysis agent includes monocarbodiimide and / or polycarbodiimide; The high temperature resistant curing agent includes isocyanate; The toughening agent includes liquid polysulfide rubber and / or liquid nitrile rubber; The filler includes ultrafine pure aluminum powder and / or silicon powder; The thermal oxidation inhibitor includes a metal chelating agent.

3. A method for preparing a flame retardant cable adhesive according to claim, characterized in that: The operation steps are: Step 1: Mix the phenolic epoxy resin and the alicyclic epoxy resin, heat to 210°C and maintain 210°C for 24 hours; Step 2: Add saturated polyester resin to high temperature resistant epoxy resin and keep it at 210°C for 6 hours; Step 3: adding a flame retardant to the mixed solution and cooling the mixture to 90°C-100°C to generate a slurry; Step 4: Finally, a coupling agent, a catalyst, an anti-hydrolysis agent, a high temperature resistant curing agent, a toughening agent, a filler and an anti-thermal oxidation agent are added to the slurry to prepare an adhesive.