CN105086032A - Pre-disperse master batch for chloroprene rubber vulcanization crosslinking and preparation method thereof - Google Patents
Pre-disperse master batch for chloroprene rubber vulcanization crosslinking and preparation method thereof Download PDFInfo
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- CN105086032A CN105086032A CN201510567565.2A CN201510567565A CN105086032A CN 105086032 A CN105086032 A CN 105086032A CN 201510567565 A CN201510567565 A CN 201510567565A CN 105086032 A CN105086032 A CN 105086032A
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Abstract
The present invention discloses a pre-disperse master batch for chloroprene rubber vulcanization crosslinking. The master batch comprises, by weight, 69-81 parts of 3-methyl-2-thiazolidinethione, 13-15 parts of chloroprene rubber, 1-3 parts of an inorganic filler and 2-10 parts of a processing aid. The invention uses chloroprene rubber as a carrier, and prepares the master batch by pre-dispersing 3-methyl-2-thiazolidinethione into chloroprene rubber, in order to reduce dust pollution and improve the working environment. The method effectively avoids the loss of 3-methyl-2-thiazolidinethione caused by melting into droplets during direct mixing, facilitates weighing and improvement of the recipe accuracy, and improves the dispersion of MTT active ingredients and compatibility of MTT with rubber. The MTT pre-dispersed master batch prepared by the method of the present invention has stable property under normal storage conditions, and does not have precipitation of active ingredients, does not adhere at room temperature, so as to realize easy and accurate proportioning, and reduce the burden bias.
Description
Technical field
The present invention relates to rubber ingredients and preparing technical field thereof, specifically a kind of pre-dispersed masterbatch particles for chloroprene rubber vulcanization crosslinking and preparation method thereof.
Background technology
MTT(namely, 3-methyl-2-thiazole thione) be a kind of thiazoles how cyclic cpds, containing active sulphur atom in structure, can produce halogen-containing high molecular polymer crosslinked, be especially suitable for chlorinated butyl rubber, chloroprene rubber vulcanization crosslinking.Compare with sulfur cross-linking system, MTT can obtain the thermal aging property of excellent physicals, lower compression set and heat-dissipating and excellence in chlorinated butyl rubber.Also good than resin curative systems with the thermal aging property of the rubber item of MTT sulfuration.The time of scorch of MTT in chlorinated butyl rubber and curing time, can delay with MBTS or MTT, also can accelerate with TMTD or ZDMC.In chlorinated butyl rubber and natural rubber blend compounds, if MTT sulfuration can be used when the content of natural rubber is no more than 20%.Containing MTT chlorinated butyl rubber sizing material can with natural rubber covulcanization, covulcanization can improve the bond properties of chlorinated butyl rubber/natural rubber blend compounds.MTT can provide very large economic benefit, exceedes other vulcanization system of chlorinated butyl rubber.Owing to needing a small amount of MTT just can obtain above-mentioned excellent performance in chlorinated butyl rubber, be mainly used in taking chloroprene rubber as the injection moulding of raw material or the rubber parts extruded: as sebific duct, sealed strip, cable sheath or insulation layer, V-type band, rubber boot, wiper etc., being the substitute of Thiourea accelerator ETU, is environment-friendly type promotor.Therefore, MTT is a kind of vulcanizing agent possessing very much cost-effectiveness, utilizes this vulcanizing agent can obtain high performance specialty elastomer goods, and suitable obvious of cost advantage.
MTT is white or beige crystals powder, is dissolved in toluene, methyl alcohol, is slightly soluble in acetone, be insoluble to gasoline and water.Due to MTT self, there is the problem of roll banding, dust from flying in it in rubber mixing process, causes formula metering to be forbidden; Meanwhile, the problems such as the healthy and contaminate environment of employee are endangered.
Summary of the invention
Technical problem to be solved by this invention is: for the deficiencies in the prior art, a kind of pre-dispersed masterbatch particles for chloroprene rubber vulcanization crosslinking and preparation method thereof is provided, by MTT being prepared into the form of masterbatch particles, reduce dust pollution with this, improve Working environment, be convenient to the accuracy weighing, improve formula, improve the dispersiveness of MTT effective constituent and the consistency of MTT and rubber.
The present invention solves the problems of the technologies described above adopted technical scheme: for the pre-dispersed masterbatch particles of chloroprene rubber vulcanization crosslinking, count by weight, consisting of of this masterbatch particles: 3-methyl-2-thiazole thione 69 ~ 81 parts, chloroprene rubber 13 ~ 15 parts, mineral filler 1 ~ 3 part, processing aid 2 ~ 10 parts.
As preferably, the particle diameter < 63 microns of described 3-methyl-2-thiazole thione.
As preferably, the particle diameter of described 3-methyl-2-thiazole thione is 20 ~ 40 microns.
As preferably, described mineral filler is white carbon black and/or metal oxide.
As preferably, the median size of described metal oxide is 1 ~ 150 micron.
As preferably, the median size of described metal oxide is 1 ~ 50 micron.
As preferably, described metal oxide is at least one in magnesium oxide, zinc oxide and plumbous oxide.
As preferably, described processing aid is at least one in softening agent, stablizer and treated oil.
As preferably, described softening agent is any one in aliphatic category, binary lipid and phthalic ester plasticizer; Described stablizer is stearic acid stablizer; Described treated oil is any one in rubber oil, industrial white oil and naphthenic oil.
The preparation method of the above-mentioned pre-dispersed masterbatch particles for chloroprene rubber vulcanization crosslinking, comprises the following steps:
(1) take according to proportion speed and prepare each raw material needed for masterbatch particles;
(2) chloroprene rubber is put in Banbury mixer by proportioning, temperature be 65 ~ 75 DEG C, rotating speed be the condition of 30 ~ 50r/min under mixing 3 ~ 7min;
(3) 3-methyl-2-thiazole thione, mineral filler and processing aid are put in the Banbury mixer of step (2), temperature be 65 ~ 75 DEG C, rotating speed continues mixing 4 ~ 8min under being the condition of 30 ~ 50r/min, obtains sizing material;
(4) by mixing for step (3) rear gained sizing material feeding to forcing machine, to extrude, pelletizing, namely obtain the pre-dispersed masterbatch particles for chloroprene rubber vulcanization crosslinking.
Compared with prior art, the invention has the advantages that: (1) the present invention take chloroprene rubber as carrier, preparing masterbatch particles by being distributed in chloroprene rubber in advance by 3-methyl-2-thiazole thione, reducing dust pollution with this, improving Working environment; Efficiently avoid 3-methyl-2-thiazole thione direct mixing time fusing form the loss that causes of drop, be convenient to the accuracy weighing, improve formula, improve the dispersiveness of MTT effective constituent and the consistency of MTT and rubber; (2) the pre-dispersed masterbatch particles of MTT stable in properties under normal storage condition of preparing of the inventive method, activeconstituents can not be separated out; Adhesion under room temperature, makes batching convenient, accurate, reduces batching deviation.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail.
Consisting of of the pre-dispersed masterbatch particles for chloroprene rubber vulcanization crosslinking of embodiment one: particle diameter is the 3-methyl-2-thiazole thione 81 parts of 35 ~ 45 microns, chloroprene rubber 13 parts, white carbon black 3 parts, dibutyl phthalate 1 part, stearic acid 1 part, rubber oil 1 part, the preparation method of this masterbatch particles, comprises the following steps:
(1) take according to proportion speed and prepare each raw material needed for masterbatch particles;
(2) chloroprene rubber is put in Banbury mixer by proportioning, temperature be 65 ~ 70 DEG C, rotating speed be the condition of 35r/min under mixing 5min;
(3) 3-methyl-2-thiazole thione, white carbon black, dibutyl phthalate, stearic acid and rubber oil are put in the Banbury mixer of step (2), temperature be 65 ~ 70 DEG C, rotating speed continues mixing 5min under being the condition of 35r/min, obtains sizing material;
(4) by mixing for step (3) rear gained sizing material feeding to forcing machine, to extrude, pelletizing, namely obtain the pre-dispersed masterbatch particles for chloroprene rubber vulcanization crosslinking of embodiment one.After testing, the density of this masterbatch particles 20 DEG C is 1.33g/cm
3, the mooney viscosity ML(1+4 of 50 DEG C) and be 50.6.
Consisting of of the pre-dispersed masterbatch particles for chloroprene rubber vulcanization crosslinking of embodiment two: particle diameter is the 3-methyl-2-thiazole thione 80 parts of 20 ~ 30 microns, chloroprene rubber 15 parts, median size is 2 parts, the magnesium oxide of 35 microns, dimixo-octyl phthalate 1 part, stearic acid 1 part, naphthenic oil 1 part, the preparation method of this masterbatch particles, comprises the following steps:
(1) take according to proportion speed and prepare each raw material needed for masterbatch particles;
(2) chloroprene rubber is put in Banbury mixer by proportioning, temperature be 68 ~ 72 DEG C, rotating speed be the condition of 45r/min under mixing 4min;
(3) 3-methyl-2-thiazole thione, magnesium oxide, dimixo-octyl phthalate, stearic acid and naphthenic oil are put in the Banbury mixer of step (2), temperature be 68 ~ 72 DEG C, rotating speed continues mixing 4min under being the condition of 45r/min, obtains sizing material;
(4) by mixing for step (3) rear gained sizing material feeding to forcing machine, to extrude, pelletizing, namely obtain the pre-dispersed masterbatch particles for chloroprene rubber vulcanization crosslinking of embodiment two.After testing, the density of this masterbatch particles 20 DEG C is 1.30g/cm
3, the mooney viscosity ML(1+4 of 50 DEG C) and be 50.1.
Consisting of of the pre-dispersed masterbatch particles for chloroprene rubber vulcanization crosslinking of embodiment three: particle diameter is the 3-methyl-2-thiazole thione 75 parts of 25 ~ 35 microns, chloroprene rubber 15 parts, median size is 3 parts, the zinc oxide of 35 microns, dimixo-octyl phthalate 2 parts, stearic acid 2 parts, industrial white oil 3 parts, the preparation method of this masterbatch particles, comprises the following steps:
(1) take according to proportion speed and prepare each raw material needed for masterbatch particles;
(2) chloroprene rubber is put in Banbury mixer by proportioning, temperature be 70 ~ 75 DEG C, rotating speed be the condition of 40r/min under mixing 3min;
(3) 3-methyl-2-thiazole thione, zinc oxide, dimixo-octyl phthalate, stearic acid and industrial white oil are put in the Banbury mixer of step (2), temperature be 70 ~ 75 DEG C, rotating speed continues mixing 5min under being the condition of 40r/min, obtains sizing material;
(4) by mixing for step (3) rear gained sizing material feeding to forcing machine, to extrude, pelletizing, namely obtain the pre-dispersed masterbatch particles for chloroprene rubber vulcanization crosslinking of embodiment three.After testing, the density of this masterbatch particles 20 DEG C is 1.29g/cm
3, the mooney viscosity ML(1+4 of 50 DEG C) and be 50.6.
Claims (10)
1. for the pre-dispersed masterbatch particles of chloroprene rubber vulcanization crosslinking, it is characterized in that, count by weight, consisting of of this masterbatch particles: 3-methyl-2-thiazole thione 69 ~ 81 parts, chloroprene rubber 13 ~ 15 parts, mineral filler 1 ~ 3 part, processing aid 2 ~ 10 parts.
2. the pre-dispersed masterbatch particles for chloroprene rubber vulcanization crosslinking according to claim 1, is characterized in that, the particle diameter < 63 microns of described 3-methyl-2-thiazole thione.
3. the pre-dispersed masterbatch particles for chloroprene rubber vulcanization crosslinking according to claim 2, is characterized in that, the particle diameter of described 3-methyl-2-thiazole thione is 20 ~ 40 microns.
4. the pre-dispersed masterbatch particles for chloroprene rubber vulcanization crosslinking according to claim 1, is characterized in that, described mineral filler is white carbon black and/or metal oxide.
5. the pre-dispersed masterbatch particles for chloroprene rubber vulcanization crosslinking according to claim 4, is characterized in that, the median size of described metal oxide is 1 ~ 150 micron.
6. the pre-dispersed masterbatch particles for chloroprene rubber vulcanization crosslinking according to claim 5, is characterized in that, the median size of described metal oxide is 1 ~ 50 micron.
7. the pre-dispersed masterbatch particles for chloroprene rubber vulcanization crosslinking according to claim 4, is characterized in that, described metal oxide is at least one in magnesium oxide, zinc oxide and plumbous oxide.
8. the pre-dispersed masterbatch particles for chloroprene rubber vulcanization crosslinking according to claim 1, is characterized in that, described processing aid is at least one in softening agent, stablizer and treated oil.
9. the pre-dispersed masterbatch particles for chloroprene rubber vulcanization crosslinking according to claim 8, is characterized in that, described softening agent is any one in aliphatic category, binary lipid and phthalic ester plasticizer; Described stablizer is stearic acid stablizer; Described treated oil is any one in rubber oil, industrial white oil and naphthenic oil.
10. the preparation method of the pre-dispersed masterbatch particles for chloroprene rubber vulcanization crosslinking according to any one of claim 1 ~ 9, is characterized in that, comprise the following steps:
(1) take according to proportion speed and prepare each raw material needed for masterbatch particles;
(2) chloroprene rubber is put in Banbury mixer by proportioning, temperature be 65 ~ 75 DEG C, rotating speed be the condition of 30 ~ 50r/min under mixing 3 ~ 7min;
(3) 3-methyl-2-thiazole thione, mineral filler and processing aid are put in the Banbury mixer of step (2), temperature be 65 ~ 75 DEG C, rotating speed continues mixing 4 ~ 8min under being the condition of 30 ~ 50r/min, obtains sizing material;
(4) by mixing for step (3) rear gained sizing material feeding to forcing machine, to extrude, pelletizing, namely obtain the pre-dispersed masterbatch particles for chloroprene rubber vulcanization crosslinking.
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| CN109912896A (en) * | 2019-03-29 | 2019-06-21 | 珠海科茂威新材料有限公司 | A kind of vulcanization of rubber delayed-action activator and its application |
| CN115678135A (en) * | 2023-01-04 | 2023-02-03 | 中国万宝工程有限公司 | Rubber composition with vulcanization promoting effect |
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| CN109912896A (en) * | 2019-03-29 | 2019-06-21 | 珠海科茂威新材料有限公司 | A kind of vulcanization of rubber delayed-action activator and its application |
| CN115678135A (en) * | 2023-01-04 | 2023-02-03 | 中国万宝工程有限公司 | Rubber composition with vulcanization promoting effect |
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