Composite oil phase and composite emulsion matrix for site-mixed emulsion explosive and preparation methods therefor
Patent Information
- Application Number
- AU2024442889
- Authority / Receiving Office
- AU · AU
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-04-29
- Filing Date
- 2024-07-22
- Publication Date
- 2026-10-29
Abstract
Description
[0009] Further, in the above composite oil phase for site-mixed emulsion explosives, a mass percentage of LVI (low viscosity index) 1# and LVI2# in Material A is 67-70%, and a mass percentage of LVI1# and LVI2# in Material B is 74-77%.
[0010] Further, in the above composite oil phase for site-mixed emulsion explosives, the specifications of raw materials in Material A and Material B are shown in Table 2. Polyisobutylene maleic anhydride amine esterified derivatives 1#, 2#, and 3# are a series of amine ester polymeric emulsifiers prepared by reacting polyisobutylene maleic anhydride with alcohol amine. Table 2 Specifications of raw materials in Material A and Material B Composite oil phase Raw materials of composite oil phase Parameters Note Material A Base oil LVI1# Flash point (°C, open cup) > 140, Kinematic viscosity (40 °C, mm2 / s): 9-12, Density (g / cm3): 0.8-0.9 Group III base oil Base oil LVI2# Flash point (°C, open cup) > 180, Kinematic viscosity (40 °C, mm2 / s): 30-35, Density (g / cm3): 0.8-0.9 Group III base oil Emulsifier SP-80 Acid value of polymeric emulsifier SP-80 (mgKOH / g) <7, Hydroxyl value (mgKOH / g): 190-230, Saponification value (mgKOH / g): 140-160 - Polyisobutylene maleic anhydride amine esterified derivative 3# Nitrogen content (%): 0.8-1.4, Acid value (mgKOH / g): 10-15, Kinematic viscosity (100°C): 140-160 - Material B Base oil LVI1# Flash point (°C, open cup) > 140, Kinematic viscosity (40 °C, mm2 / s ): 9-12, Density (g / cm3): 0.8-0.9 Group III base oil Base oil LVI2# Flash point (°C, open cup) > 180, Kinematic viscosity (40 °C, mm2 / s ): 30-35, Density (g / cm3): 0.8-0.9 Group III base oil Emulsifier SP-80 Acid value of polymeric emulsifier SP-80 (mgKOH / g)<7, Hydroxyl value (mgKOH / g): 190-230, Saponification value (mgKOH / g): 140-160 - Polyisobutylene maleic anhydride amine esterified derivative 1# Nitrogen content (%): 0.8-1.4, Acid value (mgKOH / g): 15-22, Kinematic viscosity (100C): 40-60 - Polyisobutylene maleic anhydride amine esterified derivative 2# Nitrogen content (%): 0.8-1.4, Acid value (mgKOH / g): 15-22, Kinematic viscosity (100C): 80-100 - Oleic acid Acid value (mgKOH / g): 185-210, Iodine value (mgKOH / g): 120-140, Saponification value (mgKOH / g): 190-215 -
[0011] Further, the present invention provides a method for preparing the above composite oil phase for site-mixed emulsion explosives, including:
[0012] Method for preparing Material A: Feed low-viscosity base oils LVI1# and LVI2# into a reactor according to their mass percentages in Material A . Turn on a stirrer to stir them evenly, and heat them to 40-50 °C. Then feed the polymeric emulsifier SP-80 into the reactor and stir evenly at a constant temperature of 40-50 °C. Subsequently, feed the polymeric emulsifier polyisobutylene maleic anhydride amine esterified derivative 3# into the reactor, stir and heat the resulting mixture to 65-70 °C, and continue stirring for 45-60 minutes to obtain Material A; and
[0013] Method for preparing Material B: feed low-viscosity base oils LVI1# and LVI2# into a reactor according to their mass percentages in Material B. Turn on a stirrer to stir them evenly, and heat them to 40-50 °C. Then feed the polymeric emulsifier SP-80 into the reactor and stir evenly at a constant temperature of 40-50 °C. Subsequently, feed the polymeric emulsifier polyisobutylene maleic anhydride amine esterified derivative 1# into the reactor and stir evenly at a constant temperature of 40-50 °C. Thereafter, feed the polymeric emulsifier polyisobutylene maleic anhydride amine esterified derivative 2# into the reactor and stir evenly at a constant temperature of 40-50 °C. Finally, feed a sensitizing auxiliary oleic acid into the reactor, stir and heat the resulting mixture to 65-70 °C and continue stirring for 45-60 minutes to obtain Material B.
[0014] The present invention also provides a composite emulsion matrix for site-mixed emulsion explosives, including emulsion matrix C and emulsion matrix D in a mass ratio of 45-55%:55-45%. The emulsion matrix C includes an aqueous phase and Material A of the composite oil phase in a mass ratio of 90-92:10-8. The emulsion matrix D includes an aqueous phase and Material B of the composite oil phase in a mass ratio of 90-92:10-8.
[0015] Specifically, the aqueous phase is the aqueous phase in the existing technology. Preferably, the aqueous phase is composed of water, ammonium nitrate, and ammonium acetate, with a mass ratio of 19.80-19.95% : 80 % : 0.05-0.20%.
[0016] Further, a method for preparing the above composite emulsion matrix for site-mixed emulsion explosives is further provided, including:
[0017] Mix the aqueous phase at a temperature of 75-80 C with Material A of the composite oil phase at a temperature of 40-50 C and Material B of the composite oil phase at 40-50 C in respective ratios, form emulsion matrix C and emulsion matrix D through primary stirring and mixing emulsification at 600-650 r / min and secondary static shearing emulsification, then mix and stir the emulsion matrix C and the emulsion matrix D evenly according to the mass ratio to obtain a composite emulsion matrix, place it in a thermal insulation chamber for storage, and use it for on-site charging and blasting.
[0018] Compared with the prior art, beneficial effects of the present invention are as follows:
[0019] (1) The composite oil phase is divided into Material A and Material B. Material A employs a high-viscosity polyisobutylene maleic anhydride amine esterified derivative as the main emulsifier, which can effectively increase the strength and thickness of emulsion film of the emulsion matrix, thereby improving the stability of the emulsion matrix. Material B employs a low-viscosity polyisobutylene maleic anhydride amine esterified derivative and SP-80 as the main emulsifiers, which can effectively regulate the ammonium nitrate dissolution rate of the emulsion matrix and improve the sensitization characteristics of the emulsion matrix.
[0020] (2) By mixing the emulsion matrices prepared from Material A and Material B of the composite oil phase mixed in an appropriate ratio to produce a composite emulsion matrix, the water resistance of the emulsion matrix can be effectively improved (storage period greater than 6 months), and the final viscosity (Brookfield viscosity) of the matrix can be stabilized between 25 and 35, while the problems of over-sensitization at high temperature and non-sensitization at low temperature are solved, achieving controllable sensitization density (1.08-1.20 g / cm3) within a temperature range of 35-65 C and ensuring blasint quality. DETAILED DESCRIPTIONS OF THE EMBODIMENTS
[0021] The aqueous phase formulation in the following examples consists of water, ammonium nitrate, and acetic acid in mass percentages of 19.95%:80%:0.05%.
[0022] Polyisobutylene maleic anhydride amine esterified derivatives 1#, 2#, and 3# are a series of amine ester polymeric emulsifiers prepared by reacting polyisobutylene maleic anhydride with alcohol amine. Their structure consists of three parts: a lipophilic group (hydrocarbon group), a polar group, and a linking group, and their specifications are classified according to differences in nitrogen content, acid value, and kinematic viscosity.
[0023] In the following examples, the parameters of the base oil LVI1# are: flash point 148 °C (open cup), kinematic viscosity 10.9 mm2 / s at 40 °C, density 0.84 g / cm3, and Group III base oil; the parameters of the base oil LVI2# are: flash point 192°C (open cup), kinematic viscosity 32.2 mm2 / s at 40 °C, density 0.86 g / cm3, and Group III base oil; the parameters of the emulsifier SP-80 are: acid value 6.8 mgKOH / g, hydroxyl value 207 mgKOH / g, and saponification value 149 mgKOH / g; the parameters of polyisobutylene maleic anhydride amine esterified derivative 1# are: nitrogen content 0.9%, acid value 16.4 mgKOH / g, and kinematic viscosity 56 at 100 °C; the parameters of polyisobutylene maleic anhydride amine esterified derivative 2# are: nitrogen content 1.1%, acid value 15.3 mgKOH / g, and kinematic viscosity 92 at 100 °C; the parameters of polyisobutylene maleic anhydride amine esterified derivative 3# are: nitrogen content 1.2%, acid value 12.2 mgKOH / g, and viscosity 152 at 100 °C. Example 1
[0024] A composite oil phase for site-mixed emulsion explosives was prepared and consisted of an emulsion matrix C and an emulsion matrix D. The emulsion matrix C consisted of an aqueous phase and Material A of the composite oil phase, and the emulsion matrix D consisted of the aqueous phase and Material B of the composite oil phase. The preparation method was as follows:
[0025] 1. Raw materials of Material A and Material B of the composite oil phase each satisfied the requirements for specification in Table 2, and their mass percentages are shown in Table 3. Table 3 Raw materials and mass percentages of composite oil phase Composite oil phase Raw materials of composite oil phase Mass percentages (%) Material A Base oil LVI1# 35 Base oil LVI2# 35 Emulsifier SP-80 7 Polyisobutylene maleic anhydride amine esterified derivative 3# 23 Material B Base oil LVI1# 30 Base oil LVI2# 47 Emulsifier SP-80 12 Polyisobutylene maleic anhydride amine esterified derivative 1# 3.5 Polyisobutylene maleic anhydride amine esterified derivative 2# 7 Oleic acid 0.5
[0026] 2. Preparation of composite oil phase
[0027] Preparation of Material A: Low-viscosity base oils LVI1# and LVI2# were fed into a reactor according to their mass percentages in Material A. A stirrer was turned on to stir them evenly, and the resulting mixture was heated to 45 °C. Then the polymeric emulsifier SP-80 was fed into the reactor and stirred evenly at a constant temperature of 45 °C. Subsequently, the polymeric emulsifier polyisobutylene maleic anhydride amine esterified derivative 3# was fed into the reactor, and the resulting mixture was stirred and heated to 68 °C and continued stirring for 60 minutes to obtain Material A.
[0028] Preparation of Material B: Low-viscosity base oils LVI1# and LVI2# were fed into a reactor according to their mass percentages in Material B. A stirrer was turned on to stir them evenly, and the resulting mixture was heated to 45 °C. Then the polymeric emulsifier SP-80 was fed into the reactor and stirred evenly at a constant temperature of 45 °C. Subsequently, the polymeric emulsifier polyisobutylene maleic anhydride amine esterified derivative 1# was fed into the reactor and stirred evenly at a constant temperature of 45 °C. Thereafter, the polymeric emulsifier polyisobutylene maleic anhydride amine esterified derivative 2# was fed into the reactor and stirred evenly at a constant temperature of 45 °C. Finally, a sensitizing auxiliary oleic acid was fed into the reactor, and the resulting mixture was stirred and heated to 68 °C and continued stirring for 60 minutes to obtain Material B.
[0029] 3. Preparation of composite emulsion matrix
[0030] An Orica production line was used to mix the aqueous phase (80 °C) separately with the Material A (40°C) of the composite oil phase and Material B (40°C) of the composite oil phase at a mass ratio of 92:8, and the resulting mixtures were respectively formed into emulsion matrix C and emulsion matrix D through primary stirring and mixing emulsification (650 r / min) combined with secondary static shearing emulsification. Subsequently, the emulsion matrix C and the emulsion matrix D were mixed and stirred evenly at a mass ratio of 1:1 to obtain the composite emulsion matrix, which was placed in a thermal insulation chamber for storage and used for site-mixed charging and blasting.
[0031] Implementation effects:
[0032] Technical specifications of the composite oil phase prepared in this example are shown in Table 4, and the emulsification effects of the composite oil phase are shown in Table 5. Table 4 Technical specifications of composite oil phase Composite oil phase Flash point (°C, open cup) Density (g / cm3) Kinematic viscosity (40C mm2 / s) Appearance Material A 185.7 0.873 54.1 Yellow-brown oily liquid Material B 164.2 0.862 49.8 Yellow-brown oily liquid Table 5 Emulsification effects of composite oil phase Matrix Matrix viscosity (Bu) Density after 15 min of sensitization (g / cm3) Storage period (Month) Final viscosity Viscosity after standing for 10 min 40 C 50 C 60 C Emulsion matrix C 29 26 1.24 1.22 1.13 - Emulsion matrix D 26 22.5 1.15 1.11 1.00 - Composite emulsion matrix 28 24 1.17 1.15 1.08 >6 Example 2
[0033] A composite oil phase for site-mixed emulsion explosives was prepared and consisted of an emulsion matrix C and an emulsion matrix D. The emulsion matrix C consisted of an aqueous phase and Material A of the composite oil phase, and the emulsion matrix D consisted of the aqueous phase and Material B of the composite oil phase. The preparation method was as follows:
[0034] 1. Raw materials of Material A and Material B of the composite oil phase each satisfied the requirements for specification in Table 2, and their mass percentages are shown in Table 6. Table 6 Raw materials and mass percentages of composite oil phase Composite oil phase Raw materials of composite oil phase Mass percentages (%) Material A Base oil LVI1# 36 Base oil LVI2# 32 Emulsifier SP-80 8 Polyisobutylene maleic anhydride amine esterified derivative 3# 24 Material B Base oil LVI1# 35 Base oil LVI2# 41 Emulsifier SP-80 12 Polyisobutylene maleic anhydride amine esterified derivative 1# 3.5 Polyisobutylene maleic anhydride amine esterified derivative 2# 8 Oleic acid 0.5
[0035] 2. Preparation of composite oil phase
[0036] Preparation of Material A: Low-viscosity base oils LVI1# and LVI2# were fed into a reactor according to their mass percentages in Material A. A stirrer was turned on to stir them evenly, and the resulting mixture was heated to 40 °C. Then the polymeric emulsifier SP-80 was fed into the reactor and stirred evenly at a constant temperature of 40 °C. Subsequently, the polymeric emulsifier polyisobutylene maleic anhydride amine esterified derivative 3# was fed into the reactor, and the resulting mixture was stirred and heated to 65 °C and continued stirring for 60 minutes to obtain Material A.
[0037] Preparation of Material B: Low-viscosity base oils LVI1# and LVI2# were fed into a reactor according to their mass percentages in Material B. A stirrer was turned on to stir them evenly, and the resulting mixture was heated to 40 °C. Then the polymeric emulsifier SP-80 was fed into the reactor and stirred evenly at a constant temperature of 40 °C. Subsequently, the polymeric emulsifier polyisobutylene maleic anhydride amine esterified derivative 1# was fed into the reactor and stirred evenly at a constant temperature of 40 °C. Thereafter, the polymeric emulsifier polyisobutylene maleic anhydride amine esterified derivative 2# was fed into the reactor and stirred evenly at a constant temperature of 40 °C. Finally, a sensitizing auxiliary oleic acid was fed into the reactor, and the resulting mixture was stirred and heated to 65 C and continued stirring for 60 minutes to obtain Material B.
[0038] 3. Preparation of composite emulsion matrix
[0039] An Orica production line was used to mix the aqueous phase (80 °C) separately with Material A (40°C) of the composite oil phase and Material B (40°C) of the composite oil phase at a mass ratio of 92:8, and the resulting mixtures were respectively formed into emulsion matrix C and emulsion matrix D through primary stirring and mixing emulsification (650 r / min) combined with secondary static shearing emulsification. Subsequently, the emulsion matrix C and the emulsion matrix D were mixed and stirred evenly at a mass ratio of 1:1 to obtain the composite emulsion matrix, which was placed in a thermal insulation chamber for storage and used for site-mixed charging and blasting.
[0040] Implementation effects:
[0041] Technical specifications of the composite oil phase prepared in this example are shown in Table 7, and the emulsification effects of the composite oil phase are shown in Table 8. Table 7 Technical specifications of composite oil phase Composite oil phase Flash point (°C, open cup) Density (g / cm3) Kinematic viscosity (40C mm2 / s) Appearance Material A 182.5 0.880 53.6 Yellow-brown oily liquid Material B 160.7 0.853 48.8 Yellow-brown oily liquid Table 8 Emulsification effects of composite oil phase Matrix Matrix viscosity (Bu) Density after 15 min of sensitization (g / cm3) Storage period (Month) Final viscosity Viscosity after standing for 10 min 40 C 50 C 60 C Emulsion matrix C 29 26 1.26 1.23 1.18 — Emulsion matrix D 25 22 1.16 1.12 1.05 — Composite emulsion matrix 28 24 1.19 1.15 1.13 >6 Example 3
[0042] A composite oil phase for site-mixed emulsion explosives was prepared and consisted of an emulsion matrix C and an emulsion matrix D. The emulsion matrix C consisted of an aqueous phase and Material A of the composite oil phase, and the emulsion matrix D consisted of the aqueous phase and Material B of the composite oil phase. The preparation method was as follows:
[0043] 1. Raw materials of Material A and Material B of the composite oil phase each satisfied the requirements for specification in Table 2, and their mass percentages are shown in Table 9. Table 9 Raw materials and mass percentages of composite oil phase Composite oil phase Raw materials of composite oil phase Mass percentages (%) Material A Base oil LVI1# 32 Base oil LVI2# 36 Emulsifier SP-80 8 Polyisobutylene maleic anhydride amine esterified derivative 3# 24 Material B Base oil LVI1# 35 Base oil LVI2# 40 Emulsifier SP-80 12 Polyisobutylene maleic anhydride amine esterified derivative 1# 3.5 Polyisobutylene maleic anhydride amine esterified derivative 2# 9 Oleic acid 0.5
[0044] 2. Preparation of composite oil phase
[0045] Preparation of Material A: Low-viscosity base oils LVI1# and LVI2# were fed into a reactor according to their mass percentages in Material A. A stirrer was turned on to stir them evenly, and the resulting mixture was heated to 50 °C. Then the polymeric emulsifier SP-80 was fed into the reactor and stirred evenly at a constant temperature of 50 °C. Subsequently, the polymeric emulsifier polyisobutylene maleic anhydride amine esterified derivative 3# was fed into the reactor, and the resulting mixture was stirred and heated to 70 °C and continued stirring for 60 minutes to obtain Material A.
[0046] Preparation of Material B: Low-viscosity base oils LVI1# and LVI2# were fed into a reactor according to their mass percentages in Material B. A stirrer was turned on to stir them evenly, and the resulting mixture was heated to 50 °C. Then the polymeric emulsifier SP-80 was fed into the reactor and stirred evenly at a constant temperature of 50 °C. Subsequently, the polymeric emulsifier polyisobutylene maleic anhydride amine esterified derivative 1# was fed into the reactor and stirred evenly at a constant temperature of 50 °C. Thereafter, the polymeric emulsifier polyisobutylene maleic anhydride amine esterified derivative 2# was fed into the reactor and stirred evenly at a constant temperature of 50 °C. Finally, a sensitizing auxiliary oleic acid was fed into the reactor, and the resulting mixture was stirred and heated to 70 C and continued stirring for 60 minutes to obtain Material B.
[0047] 3. Preparation of composite emulsion matrix
[0048] An Orica production line was used to mix the aqueous phase (80 °C) separately with Material A (50°C) of the composite oil phase and Material B (50°C) of the composite oil phase at a mass ratio of 92:8, and the resulting mixtures were respectively formed into emulsion matrix C and emulsion matrix D through primary stirring and mixing emulsification (650 r / min) combined with secondary static shearing emulsification. Subsequently, the emulsion matrix C and the emulsion matrix D were mixed and stirred evenly at a mass ratio of 1:1 to obtain the composite emulsion matrix, which was placed in a thermal insulation chamber for storage and used for site-mixed charging and blasting.
[0049] Implementation effects:
[0050] Technical specifications of the composite oil phase prepared in this example are shown in Table 10, and the emulsification effects of the composite oil phase are shown in Table 11. Table 10 Technical specifications of composite oil phase Composite oil phase Flash point (°C, open cup) Density (g / cm3) Kinematic viscosity (40C mm2 / s) Appearance Material A 184.1 0.883 54.3 Yellow-brown oily liquid Material B 161.2 0.854 49.0 Yellow-brown oily liquid Table 11 Emulsification effects of composite oil phase Matrix Matrix viscosity (Bu) Density after 15 min of sensitization (g / cm3) Storage period (Month) Final viscosity Viscosity after standing for 10 min 40 C 50 C 60 C Emulsion matrix C 30 26.5 1.25 1.21 1.15 — Emulsion matrix D 26.5 22 1.15 1.10 0.98 — Composite emulsion matrix 28.5 24.5 1.18 1.14 1.09 >6
Claims
1. A composite oil phase for site-mixed emulsion explosives, comprising Material A and Material B, wherein raw materials in Material A and Material B and their mass percentages are listed in Table 1:Table 1 Raw materials and mass percentages of composite oil phaseComposite oil phase Raw materials of composite oil phase Mass percentages (%) Material A Base oil LVI1# 35-45 Base oil LVI2# 22-35 Emulsifier SP-80 7-10 Polyisobutylene maleic anhydride amine esterified derivative 3# 20-26 Material B Base oil LVI1# 30-40 Base oil LVI2# 34-47 Emulsifier SP-80 11-13 Polyisobutylene maleic anhydride amine esterified derivative 1# 3-4 Polyisobutylene maleic anhydride amine esterified derivative 2# 7-10 Oleic acid 0.3-0.
72. The composite oil phase for site-mixed emulsion explosives according to claim 1, wherein a mass percentage of LVI1# and LVI2# in Material A is 67-70%, and a mass percentage of LVI1# and LVI2# in Material B is 74-77%.
3. The composite oil phase for site-mixed emulsion explosives according to claim 1, wherein specifications of raw materials in Material A and Material B are shown in Table 2:Table 2 Specifications of raw materials in Material A and Material BComposite oil phase Raw materials of composite oil phase Parameters Note Material A Base oil LVI1# Flash point (°C, open cup) > 140, Kinematic viscosity (40 °C, mm2 / s ): 9-12, Density (g / cm3): 0.8-0.9 Group III base oil Base oil LVI2# Flash point (°C, open cup) > 180, Kinematic viscosity (40 °C, mm2 / s ): 30-35, Density (g / cm3): 0.8-0.9 Group III base oil Emulsifier SP-80 Acid value of polymeric emulsifier SP-80 (mgKOH / g) <7, Hydroxyl value (mgKOH / g): 190-230, Saponification value (mgKOH / g): 140-160 - Polyisobutylene maleic anhydride amine esterified derivative 3# Nitrogen content (%): 0.8-1.4, Acid value (mgKOH / g): 10-15, Kinematic viscosity (100^): 140-160 - Material B Base oil LVI1# Flash point (°C, open cup) > 140, Group IIIKinematic viscosity (40 °C, mm2 / s ): 9-12, Density (g / cm3): 0.8-0.9 base oil Base oil LVI2# Flash point (°C, open cup) > 180, Kinematic viscosity (40 °C, mm2 / s ): 30-35, Density (g / cm3): 0.8-0.9 Group III base oil Emulsifier SP-80 Acid value of polymeric emulsifier SP-80 (mgKOH / g)<7, Hydroxyl value (mgKOH / g): 190-230, Saponification value (mgKoH / g): 140-160 - Polyisobutylene maleic anhydride amine esterified derivative 1# Nitrogen content (%): 0.8-1.4, Acid value (mgKOH / g): 15-22, Kinematic viscosity (100OC): 40-60 - Polyisobutylene maleic anhydride amine esterified derivative 2# Nitrogen content (%): 0.8-1.4, Acid value (mgKOH / g): 15-22, Kinematic viscosity (100C): 80-100 - Oleic acid Acid value (mgKOH / g): 185-210, Iodine value (mgKOH / g): 120-140, Saponification value (mgKOH / g): 190-215 -4. A method for preparing the composite oil phase for site-mixed emulsion explosives according to claim 1, comprising:method for preparing Material A: feeding low-viscosity base oils LVI1# and LVI2# according to their mass percentages in Material A into a reactor, turning on a stirrer to stir them evenly, and heating them to 40-50 °C; then feeding the polymeric emulsifier SP-80 into the reactor and stirring evenly at a constant temperature of 40-50 °C; subsequently, feeding the polymeric emulsifier polyisobutylene maleic anhydride amine esterified derivative 3# into the reactor, stirring and heating the resulting mixture to 65-70 °C and continuing stirring for 45-60 minutes to obtain Material A; andmethod for preparing Material B: feeding low-viscosity base oils LVI1# and LVI2# according to their mass percentages in Material B into a reactor, turning on a stirrer to stir them evenly, and heating them to 40-50 °C; then feeding the polymeric emulsifier SP-80 into the reactor and stirring evenly at a constant temperature of 40-50 °C; subsequently, feeding the polymeric emulsifier polyisobutylene maleic anhydride amine esterified derivative 1# into the reactor and stirring evenly at a constant temperature of 40-50 °C; thereafter, feeding the polymeric emulsifier polyisobutylene maleic anhydride amine esterified derivative 2# into the reactor and stirring evenly at a constant temperature of 40-50 °C; and finally, feeding a sensitizing auxiliary oleic acid into the reactor, stirring and heating the resulting mixture to 65-70 °C and continuing stirring for 45-60 minutes to obtain Material B.
5. A composite emulsion matrix for site-mixed emulsion explosives, wherein it is a composite emulsion matrix for site-mixed emulsion explosives comprising the composite oil phase of claim 1.
6. The composite emulsion matrix for site-mixed emulsion explosives according to claim 5, comprising emulsion matrix C and emulsion matrix D in a mass ratio of 45-55%:55-45%, wherein the emulsion matrix C comprises an aqueous phase and Material A of the composite oil phase in a mass ratio of 90-92:10-8, and the emulsion matrix D comprises an aqueous phase and Material B of the composite oil phase in a mass ratio of 90-92:10-8.
7. A method for preparing the composite emulsion matrix for site-mixed emulsionexplosives according to claim 6, comprising mixing the aqueous phase at a temperature of 75-80C, according to the mass ratios, with Material A of the composite oil phase at a temperature of 40-50C and Material B of the composite oil phase at 40-50C in respective ratios, forming emulsion matrix C and emulsion matrix D through primary stirring and mixing emulsification at 600-650 r / min and secondary static shearing emulsification, then mixing and stirring the emulsion matrix C and the emulsion matrix D evenly according to the mass ratio to obtain a composite emulsion matrix, placing it in a thermal insulation chamber for storage, and using it for on-site charging and blasting.