CN102059074A - Method for granulating rubber vulcanization accelerator TETD (Tetraethylthiuram Disulfide) - Google Patents
Method for granulating rubber vulcanization accelerator TETD (Tetraethylthiuram Disulfide) Download PDFInfo
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- CN102059074A CN102059074A CN2010105586478A CN201010558647A CN102059074A CN 102059074 A CN102059074 A CN 102059074A CN 2010105586478 A CN2010105586478 A CN 2010105586478A CN 201010558647 A CN201010558647 A CN 201010558647A CN 102059074 A CN102059074 A CN 102059074A
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Abstract
The invention discloses a method for granulating a rubber vulcanization accelerator TETD (Tetraethylthiuram Disulfide), comprising the following steps of: (1) adding a cementing agent into a TETD wet material, sufficiently stirring, and adding into a granulator to ensure that the material is squeezed out from a machine head template hole to form even cylindrical granules through screw conveying; and (2) drying, separating by utilizing screen cloth and directly packaging the granular product to obtain an end product, wherein the TETD is an abbreviation of tetraethylthiuram disulfide and the cementing agent is made from the following constituents in parts by mass: 80-100 parts of polyvinyl alcohol, 80-100 parts of povidone, 70-90 parts of vinyl acetate, 40-50 parts of liquid paraffin, 1-5 parts of emulsifying agent, 0.5-1 part of polyoxyethylene, 0.1-0.5 part of NaHCO3 and 180-200 parts of water. By means of the method for granulating the rubber vulcanization accelerator TETD, the manpower and material resources are saved; the energy consumption is reduced; the once granulation rate of the product is high; the average hardness is about 2N and the quality index accords with the standard of a first-grade product in China.
Description
Technical field
The present invention relates to the prilling process and the granulation binding agent of a kind of vulcanization of rubber accelerant disulfide Thiuram (TETD), belong to the TETD technical field of granulating production.
Background technology
Tetraethylthiuram disulfide (TETD) is natural gum, butadiene-styrene rubber, NBR, cis-butadiene cement and latex ultras, also can make vulcanizing agent, and effective sulfur content is 11% of its weight.Performance is similar to TM monex TD when doing promoter, but its activity is low slightly, is difficult for incipient scorch, handling safety, and the bloom tendency is less.This product is the second good promoter of thiazole accelerator, and aldehyde amines and guanidines are also had activation.Need be equipped with zinc oxide when doing first promoter, but lead monoxide there is inhibitory action to it with this product.This product is easily disperseed in sizing material, does not pollute, nondiscolouring.Along with the increasingly stringent that requires of environment protection health management and industrial use, for fear of problems such as dust, powder product is more and more substituted by pelletized product in industry.Pelletized product and powder product relatively have following advantage: not having dust from flying in the use, is user friendly product; Pelletized product does not have surface attachment, disperses easily, easier metering in the auxiliary agent product uses.The granulation of rubber chemicals is technical process of the final products of auxiliary agent production process, and the granulating technique level of the integral body of China's rubber accelerator is not high at present, and development is also uneven, and the ratio of granulation product is on the low side.That the promoter granulating technique comprises is oil-filled, non-slurry pelletizing, wet granulation, melt pelletization and the pre-dispersed granulation of carrier.The granulation of rubber accelerator all has crucial meaning to auxiliary agent factory and rubber mill, has reduced the pollution of dust, has increased the accuracy of processing factory's batching, ensures that to improving the sizing material physical property product quality has played facilitation.
Two kinds of non-slurry pelletizing, wet granulations are generally adopted in present stage TETD granulation.Non-slurry pelletizing be with the TETD siccative with after binding agent, water etc. mixes in proportion, through use the belt dryer drying after extruding or the spray-on process granulation, dry back product gets finished product after vibratory sieve is handled.And wet granulation be with the TETD wet feed with after binding agent, water etc. mixes in proportion, after granulation, drying finished product.Excessive or select improperly if add binding agent in granulation process, can cause particle really up to the mark, difficulty etc. during dispersion, but if do not add or add very little, then cause cohesive force not enough, granulating rate is too low, and particle scatters again in the transportation handling process, does not reach the granulation purpose.
The TETD grain in application process since the problems such as hardness of grain exist to be difficult for disperse, problem such as mixing time is long, therefore, needing a kind of being easy to badly disperses, the granulating rate height is with the prilling process of all very strong promoter TETD of the compatibility of multiple rubber.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, the prilling process of a kind of thiofide TETD is provided.
Second purpose of the present invention provides a kind of binding agent that is used for thiofide TETD granulation.
Technical scheme of the present invention is summarized as follows:
The prilling process of thiofide TETD may further comprise the steps:
(1) binding agent is added in the TETD wet feed of moisture mass content≤25%, after stirring, add in the comminutor, make material from the head die plate hole, extrude the cylindrical particle that uniform diameter is 2 ± 0.2mm by screw rod transmission;
(2) use belt dryer, 40-50 ℃ of drying, with vibration screen separating particles shape product and powder, with the direct finished product packing of described granular product, powder returns granulation again, described TETD is the abbreviation of tetraethylthiuram disulfide, and described binding agent is made with following component by mass fraction: polyvinyl alcohol: 80-100 part; PVP: 80-100 part; Vinylacetate: 70-90 part; Atoleine: 40-50 part; Emulsifying agent: 1-5 part; Polyethylene glycol oxide: 0.5-1 part; NaHCO
3: 0.1-0.5 part; Water: 180-200 part.
Described emulsifying agent is NPE, OPEO or octadecane alcohol radical APEO.
Preferably, the adding quality of binding agent is 0.5%～3% of a TETD material dry product quality, preferably 1%.
A kind of binding agent that is used for thiofide TETD granulation is made with following component by mass fraction: polyvinyl alcohol: 80-100 part; PVP: 80-100 part; Vinylacetate: 70-90 part; Atoleine: 40-50 part; Emulsifying agent: 1-5 part; Polyethylene glycol oxide: 0.5-1 part; NaHCO
3: 0.1-0.5 part; Water: 180-200 part.
Described emulsifying agent is NPE, OPEO or octadecane alcohol radical APEO.
The present invention directly carries out granulation by wet feed, avoided the prior art problem, the problem includes: twice dry problem, manpower and materials have been saved, reduced energy consumption, the binding agent that is used for thiofide TETD granulation that adds in granulation process makes granulating rate height of material, gained TETD grain intensity is big, pulverization rate is low, but to the physicochemical properties of product and vulcanization reaction character without any influence, meet the environmental protection policy of country.
Use granulating rate of method granulation TETD product of the present invention up to more than 80%, average hardness can reach customer requirements fully about 2N, does not occur the broken phenomenon of particle in the packing moving process.The TETD grain is after chemical examination is measured, and its quality index meets country-level product standard.This TETD pelletized product is not observed serious dust from flying phenomenon in mixing process, do not find to mix uneven phenomenon, compares with powder product, and TETD grain mixing time, curingprocess rate, time of scorch, elongation at break etc. all do not have significant difference.Owing in binding agent, added a spot of dispersant, to compare with other TETD pelletized products, its application performance (mixing time, curingprocess rate, time of scorch, elongation at break etc.) has certain advantage.
Granulation process of the present invention is simple, is easy to industrialization, and binder formula is reasonable, and all very strong with the compatibility of multiple rubber, consumption is few, and is effective, granulating rate height of product, and properties of product are not had influence.
The specific embodiment
The present invention is described in further detail below by specific embodiment:
Following examples can make those skilled in the art more fully understand the present invention, but do not limit the present invention in any way.
Embodiment 1
The prilling process of thiofide TETD may further comprise the steps:
According to subordinate list 1 preparation binding agent; is that 5% TETD wet feed join in agitated kettle with the ratio of the weight 0.5% of TETD dry product with the moisture mass content with the binding agent for preparing; behind abundant stirring and evenly mixing; add in the comminutor; make wet product material from the head die plate hole, extrude the cylindrical particle that uniform diameter is 2 ± 0.2mm by screw rod transmission; after through 40 ℃ of dryings of belt dryer; separate grain and powder with vibration screen; the direct finished product packing of granular product on the screen cloth, powder returns in the agitated kettle stirring-granulating again under the screen cloth.Use granulating rate of this method granulation product up to more than 80%, average hardness can reach customer requirements fully about 2.00N, and properties of product are compared indifference with the TETD powder.
Subordinate list 1: binding agent becomes to be grouped into
| Composition | Mass fraction |
| Polyvinyl alcohol | 80 |
| PVP | 80 |
| Vinylacetate | 70 |
| Atoleine | 40 |
| NPE | 1 |
| Polyethylene glycol oxide | 0.5 |
| NaHCO 3 | 0.1 |
| Water | 180 |
Embodiment 2
The prilling process of thiofide TETD may further comprise the steps:
According to subordinate list 2 preparation binding agents; is that 25%TETD wet feed join in agitated kettle with the ratio of the weight 1% of TETD dry product with the moisture mass content with the binding agent for preparing; behind abundant stirring and evenly mixing; add in the comminutor; make wet product material from the head die plate hole, extrude the cylindrical particle that uniform diameter is 2 ± 0.2mm by screw rod transmission; after through 45 ℃ of dryings of belt dryer; separate grain and powder with vibration screen; the direct finished product packing of granular product on the screen cloth, powder returns in the agitated kettle stirring-granulating again under the screen cloth.Use granulating rate of this method granulation product up to more than 81.7%, average hardness can reach customer requirements fully about 2.00N, and properties of product are compared indifference with the TETD powder.
Subordinate list 2: binding agent becomes to be grouped into
| Composition | Mass fraction |
| Polyvinyl alcohol | 90 |
| PVP | 90 |
| Vinylacetate | 80 |
| Atoleine | 45 |
| OPEO | 3 |
| Polyethylene glycol oxide | 0.7 |
| NaHCO 3 | 0.3 |
| Water | 190 |
Embodiment 3
The prilling process of thiofide TETD may further comprise the steps:
According to subordinate list 3 preparation binding agents; is that 20%TETD wet feed join in agitated kettle with the ratio of the weight 3% of TETD dry product with the moisture mass content with the binding agent for preparing; behind abundant stirring and evenly mixing; add in the comminutor; make wet product material from the head die plate hole, extrude the cylindrical particle that uniform diameter is 2 ± 0.2mm by screw rod transmission; after through 50 ℃ of dryings of belt dryer; separate grain and powder with vibration screen; the direct finished product packing of granular product on the screen cloth, powder returns in the agitated kettle stirring-granulating again under the screen cloth.Use granulating rate of this method granulation product up to more than 83.5%, average hardness can reach customer requirements fully about 2.00N, and properties of product are compared indifference with the TETD powder.
Subordinate list 3: binding agent becomes to be grouped into
| Composition | Parts by weight |
| Polyvinyl alcohol | 100 |
| PVP | 100 |
| Vinylacetate | 90 |
| Atoleine | 50 |
| Octadecane alcohol radical APEO | 5 |
| Polyethylene glycol oxide | 1 |
| NaHCO 3 | 0.5 |
| Water | 200 |
Although above the preferred embodiments of the present invention are described; but the present invention is not limited to the above-mentioned specific embodiment; the above-mentioned specific embodiment only is schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not breaking away under the scope situation that aim of the present invention and claim protect, can also make the concrete conversion of a lot of forms, these all belong within protection scope of the present invention.
Claims (6)
1. the prilling process of thiofide TETD is characterized in that may further comprise the steps:
(1) binding agent is added in the TETD wet feed of moisture mass content≤25%, after stirring, add in the comminutor, make material from the head die plate hole, extrude the cylindrical particle that uniform diameter is 2 ± 0.2mm by screw rod transmission;
(2) use belt dryer, 40-50 ℃ of drying, with vibration screen separating particles shape product and powder, with the direct finished product packing of described granular product, powder returns granulation again, described TETD is the abbreviation of tetraethylthiuram disulfide, and described binding agent is made with following component by mass fraction: polyvinyl alcohol: 80-100 part; PVP: 80-100 part; Vinylacetate: 70-90 part; Atoleine: 40-50 part; Emulsifying agent: 1-5 part; Polyethylene glycol oxide: 0.5-1 part; NaHCO
3: 0.1-0.5 part; Water: 180-200 part.
2. method according to claim 1 is characterized in that described emulsifying agent is NPE, OPEO or octadecane alcohol radical APEO.
3. method according to claim 2, the adding quality that it is characterized in that described binding agent are 0.5%～3% of TETD material dry product quality.
4. method according to claim 3, the adding quality that it is characterized in that described binding agent are 1% of TETD material dry product quality.
5. a binding agent that is used for thiofide TETD granulation is characterized in that making with following component by mass fraction: polyvinyl alcohol: 80-100 part; PVP: 80-100 part; Vinylacetate: 70-90 part; Atoleine: 40-50 part; Emulsifying agent: 1-5 part; Polyethylene glycol oxide: 0.5-1 part; NaHCO
3: 0.1-0.5 part; Water: 180-200 part.
6. a kind of binding agent that is used for thiofide TETD granulation according to claim 5 is characterized in that described emulsifying agent is NPE, OPEO or octadecane alcohol radical APEO.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105586478A CN102059074A (en) | 2010-11-24 | 2010-11-24 | Method for granulating rubber vulcanization accelerator TETD (Tetraethylthiuram Disulfide) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105586478A CN102059074A (en) | 2010-11-24 | 2010-11-24 | Method for granulating rubber vulcanization accelerator TETD (Tetraethylthiuram Disulfide) |
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| Publication Number | Publication Date |
|---|---|
| CN102059074A true CN102059074A (en) | 2011-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105586478A Pending CN102059074A (en) | 2010-11-24 | 2010-11-24 | Method for granulating rubber vulcanization accelerator TETD (Tetraethylthiuram Disulfide) |
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Application publication date: 20110518 |