High-elongation rubber for joint and preparation method of high-elongation rubber

Abstract

The invention provides high-elongation rubber for a joint. The high-elongation rubber comprises the following components in parts by weight: 45-50 parts of ethylene propylene rubber, 30-45 parts of ethylene propylene diene monomer, 10-20 parts of liquid ethylene propylene rubber, 20-25 parts of zinc oxide, 50-55 parts of carbon black N330, 10-15 parts of paraffin oil 2280, 3.0-5.0 parts of an anti-aging agent and 2.0-7.0 parts of a vulcanizing agent. According to the invention, improvement is carried out on the basis of a common heat-resistant rubber formula, the liquid ethylene propylene rubber is added at the same time, and the loss of an anti-aging agent in the ethylene propylene rubber vulcanization process is changed through a correct anti-aging agent ratio, so that the anti-aging agent can inhibit the heat effect to the maximum extent, thereby maintaining the high elongation of the ethylene propylene rubber after aging and prolonging the service life of the rubber; and moreover, the rubber is not obviously changed after being aged for 800000 times of dynamic tests, that is, the rubber with high elongation is only gradually weakened by the elongation force instead of being directly applied to the stripping force under the same acting force, so that the aim of keeping the adhesive property unchanged after the rubber is aged can be achieved.

Description

technical field

[0001] The invention relates to the technical field of ethylene-propylene rubber, in particular to a high-elongation rubber for joints. Background technique

[0002] In view of the huge difference between the structure of the high-temperature-resistant conveyor belt and the ordinary conveyor belt, the sealing part of the high-heat-resistant conveyor belt joint cannot be treated in the same way as the ordinary conveyor belt. The rubber with the same vulcanization system as the covering rubber must be used as the transition layer to achieve adhesion However, it has been proved by experiments and actual use that the existing rubber is not enough to meet the application of the conveyor belt in a high-temperature environment, and the transition layer is very easy to fail in a long-term high-temperature environment, resulting in the seal and the underlying cloth layer being in a high-temperature environment. Adhesive failure occurs in advance, so as to maintain the...

Examples

Embodiment 1

[0020] A high-elongation joint rubber, comprising the following components by weight: 45 parts of K740 rubber, 45 parts of 4045 rubber, 10 parts of liquid ethylene-propylene rubber T65, 20 parts of zinc oxide, 50 parts of carbon black N330, paraffin wax 15 parts of oil 2280, 1.0 parts of anti-aging agent RD, 1.0 parts of anti-aging agent MB, 1 part of anti-aging agent MC, 3 parts of vulcanizing agent DCP.

[0021] A preparation method of high elongation rubber for joints:

[0022] (1) Preparation of one stage of mixed rubber: Take K740 rubber 225g, 4045 rubber 225g, liquid ethylene propylene rubber T65 50g, zinc oxide 100g, carbon black N330 250g, paraffin oil 75g, antioxidant RD 7.5g, antioxidant MB 7.5g , anti-aging agent MC 5g, vulcanizing agent DCP 15g; press K740 rubber and 4045 rubber 1min-zinc oxide 1min-antiaging agent 1min-carbon black+paraffin oil 2min-vulcanizing agent DCP 1min when the internal temperature reaches 60°C with an internal mixer Sequentially add and m...

Embodiment 2

[0025] A high-elongation joint rubber, comprising the following components by weight: 50 parts of K740 rubber, 40 parts of 4045 rubber, 10 parts of liquid ethylene-propylene rubber T65, 20 parts of zinc oxide, 50 parts of carbon black N330, paraffin wax 15 parts of oil 2280, 1.5 parts of anti-aging agent RD, 1.5 parts of anti-aging agent MB, 1 part of anti-aging agent MC, 3 parts of vulcanizing agent DCP.

[0026] A preparation method of high elongation rubber for joints:

[0027] (1) Preparation of one stage of mixed rubber: Take K740 rubber 250g, 4045 rubber 200g, liquid ethylene propylene rubber T65 50g, zinc oxide 100g, carbon black N330 250g, paraffin oil 75g, antioxidant RD 7.5g, antioxidant MB 7.5g , anti-aging agent MC 5g, vulcanizing agent DCP 15g, when the internal temperature reaches 60°C with an internal mixer, add K740 rubber and 4045 rubber 1min-zinc oxide 1min-antiaging agent 1min-carbon black+paraffin oil 2min-vulcanizing agent 1min in sequence Mix and knead t...

Embodiment 3

[0030] A high-elongation joint rubber, comprising the following components by weight: 50 parts of K740 rubber, 30 parts of 4045 rubber, 20 parts of liquid ethylene propylene rubber, 20 parts of zinc oxide, 55 parts of carbon black N330, paraffin oil 15 parts of 2280, 1.5 parts of anti-aging agent RD, 1.5 parts of anti-aging agent MB, 1 part of anti-aging agent MC, 3 parts of vulcanizing agent DCP.

[0031] A preparation method of high elongation rubber for joints:

[0032] (1) Preparation of one stage of mixed rubber: Take K740 rubber 250g, 4045 rubber 150g, liquid ethylene propylene rubber T65 100g, zinc oxide 100g, carbon black N330 250g, paraffin oil 75g, antioxidant RD 7.5g, antioxidant MB 7.5g , anti-aging agent MC 5g, vulcanizing agent DCP 15g; when the internal temperature reaches 60°C with an internal mixer, add solid rubber 1min-zinc oxide 1min-antiaging agent 1min-carbon black+paraffin oil 2min-vulcanizing agent DCP 1min in order to mix and knead Make the rubber mat...

technical field

[0001] The invention relates to the technical field of ethylene-propylene rubber, in particular to a high-elongation rubber for joints. Background technique

[0002] In view of the huge difference between the structure of the high-temperature-resistant conveyor belt and the ordinary conveyor belt, the sealing part of the high-heat-resistant conveyor belt joint cannot be treated in the same way as the ordinary conveyor belt. The rubber with the same vulcanization system as the covering rubber must be used as the transition layer to achieve adhesion However, it has been proved by experiments and actual use that the existing rubber is not enough to meet the application of the conveyor belt in a high-temperature environment, and the transition layer is very easy to fail in a long-term high-temperature environment, resulting in the seal and the underlying cloth layer being in a high-temperature environment. Adhesive failure occurs in advance, so as to maintain the...

Examples

Embodiment 1

[0020] A high-elongation joint rubber, comprising the following components by weight: 45 parts of K740 rubber, 45 parts of 4045 rubber, 10 parts of liquid ethylene-propylene rubber T65, 20 parts of zinc oxide, 50 parts of carbon black N330, paraffin wax 15 parts of oil 2280, 1.0 parts of anti-aging agent RD, 1.0 parts of anti-aging agent MB, 1 part of anti-aging agent MC, 3 parts of vulcanizing agent DCP.

[0021] A preparation method of high elongation rubber for joints:

[0022] (1) Preparation of one stage of mixed rubber: Take K740 rubber 225g, 4045 rubber 225g, liquid ethylene propylene rubber T65 50g, zinc oxide 100g, carbon black N330 250g, paraffin oil 75g, antioxidant RD 7.5g, antioxidant MB 7.5g , anti-aging agent MC 5g, vulcanizing agent DCP 15g; press K740 rubber and 4045 rubber 1min-zinc oxide 1min-antiaging agent 1min-carbon black+paraffin oil 2min-vulcanizing agent DCP 1min when the internal temperature reaches 60°C with an internal mixer Sequentially add and m...

Embodiment 2

[0025] A high-elongation joint rubber, comprising the following components by weight: 50 parts of K740 rubber, 40 parts of 4045 rubber, 10 parts of liquid ethylene-propylene rubber T65, 20 parts of zinc oxide, 50 parts of carbon black N330, paraffin wax 15 parts of oil 2280, 1.5 parts of anti-aging agent RD, 1.5 parts of anti-aging agent MB, 1 part of anti-aging agent MC, 3 parts of vulcanizing agent DCP.

[0026] A preparation method of high elongation rubber for joints:

[0027] (1) Preparation of one stage of mixed rubber: Take K740 rubber 250g, 4045 rubber 200g, liquid ethylene propylene rubber T65 50g, zinc oxide 100g, carbon black N330 250g, paraffin oil 75g, antioxidant RD 7.5g, antioxidant MB 7.5g , anti-aging agent MC 5g, vulcanizing agent DCP 15g, when the internal temperature reaches 60°C with an internal mixer, add K740 rubber and 4045 rubber 1min-zinc oxide 1min-antiaging agent 1min-carbon black+paraffin oil 2min-vulcanizing agent 1min in sequence Mix and knead t...

Embodiment 3

[0030] A high-elongation joint rubber, comprising the following components by weight: 50 parts of K740 rubber, 30 parts of 4045 rubber, 20 parts of liquid ethylene propylene rubber, 20 parts of zinc oxide, 55 parts of carbon black N330, paraffin oil 15 parts of 2280, 1.5 parts of anti-aging agent RD, 1.5 parts of anti-aging agent MB, 1 part of anti-aging agent MC, 3 parts of vulcanizing agent DCP.

[0031] A preparation method of high elongation rubber for joints:

[0032] (1) Preparation of one stage of mixed rubber: Take K740 rubber 250g, 4045 rubber 150g, liquid ethylene propylene rubber T65 100g, zinc oxide 100g, carbon black N330 250g, paraffin oil 75g, antioxidant RD 7.5g, antioxidant MB 7.5g , anti-aging agent MC 5g, vulcanizing agent DCP 15g; when the internal temperature reaches 60°C with an internal mixer, add solid rubber 1min-zinc oxide 1min-antiaging agent 1min-carbon black+paraffin oil 2min-vulcanizing agent DCP 1min in order to mix and knead Make the rubber mat...

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