CN116079958A - Green tyre external spray and preparation method thereof - Google Patents
Green tyre external spray and preparation method thereof Download PDFInfo
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- CN116079958A CN116079958A CN202310046204.8A CN202310046204A CN116079958A CN 116079958 A CN116079958 A CN 116079958A CN 202310046204 A CN202310046204 A CN 202310046204A CN 116079958 A CN116079958 A CN 116079958A
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- 239000007921 spray Substances 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title abstract description 13
- 229920000126 latex Polymers 0.000 claims abstract description 41
- 239000004816 latex Substances 0.000 claims abstract description 41
- 239000007788 liquid Substances 0.000 claims abstract description 32
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 claims abstract description 31
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000008367 deionised water Substances 0.000 claims abstract description 17
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 17
- 239000000945 filler Substances 0.000 claims abstract description 12
- 239000004094 surface-active agent Substances 0.000 claims abstract description 12
- -1 alkylbenzene sulfonate Chemical class 0.000 claims description 23
- 239000002202 Polyethylene glycol Substances 0.000 claims description 17
- 229920001223 polyethylene glycol Polymers 0.000 claims description 17
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 12
- 239000000194 fatty acid Substances 0.000 claims description 12
- 229930195729 fatty acid Natural products 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 10
- 239000003945 anionic surfactant Substances 0.000 claims description 9
- 239000002736 nonionic surfactant Substances 0.000 claims description 9
- 229920001084 poly(chloroprene) Polymers 0.000 claims description 8
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical group C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 125000000542 sulfonic acid group Chemical group 0.000 claims description 5
- 239000011256 inorganic filler Substances 0.000 claims description 4
- 229910003475 inorganic filler Inorganic materials 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 4
- 239000002174 Styrene-butadiene Substances 0.000 claims description 3
- 239000011115 styrene butadiene Substances 0.000 claims description 3
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims 1
- 229920001971 elastomer Polymers 0.000 abstract description 20
- 239000005060 rubber Substances 0.000 abstract description 20
- 238000004073 vulcanization Methods 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 230000007547 defect Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 23
- 238000002955 isolation Methods 0.000 description 20
- 230000000052 comparative effect Effects 0.000 description 18
- 238000005507 spraying Methods 0.000 description 15
- ONCZQWJXONKSMM-UHFFFAOYSA-N dialuminum;disodium;oxygen(2-);silicon(4+);hydrate Chemical group O.[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Na+].[Na+].[Al+3].[Al+3].[Si+4].[Si+4].[Si+4].[Si+4] ONCZQWJXONKSMM-UHFFFAOYSA-N 0.000 description 13
- 229940080314 sodium bentonite Drugs 0.000 description 13
- 229910000280 sodium bentonite Inorganic materials 0.000 description 13
- 239000003795 chemical substances by application Substances 0.000 description 8
- 238000001035 drying Methods 0.000 description 8
- QGVQVNIIRBPOAM-UHFFFAOYSA-N dodecyl naphthalene-1-sulfonate;sodium Chemical compound [Na].C1=CC=C2C(S(=O)(=O)OCCCCCCCCCCCC)=CC=CC2=C1 QGVQVNIIRBPOAM-UHFFFAOYSA-N 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 3
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 3
- 239000004636 vulcanized rubber Substances 0.000 description 3
- YIWGJFPJRAEKMK-UHFFFAOYSA-N 1-(2H-benzotriazol-5-yl)-3-methyl-8-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carbonyl]-1,3,8-triazaspiro[4.5]decane-2,4-dione Chemical compound CN1C(=O)N(c2ccc3n[nH]nc3c2)C2(CCN(CC2)C(=O)c2cnc(NCc3cccc(OC(F)(F)F)c3)nc2)C1=O YIWGJFPJRAEKMK-UHFFFAOYSA-N 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 239000002775 capsule Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- WBIQQQGBSDOWNP-UHFFFAOYSA-N 2-dodecylbenzenesulfonic acid Chemical compound CCCCCCCCCCCCC1=CC=CC=C1S(O)(=O)=O WBIQQQGBSDOWNP-UHFFFAOYSA-N 0.000 description 1
- 239000002313 adhesive film Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000003093 cationic surfactant Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000009658 destructive testing Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 229940060296 dodecylbenzenesulfonic acid Drugs 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 125000005456 glyceride group Chemical group 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 235000003642 hunger Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000003223 protective agent Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 230000007928 solubilization Effects 0.000 description 1
- 238000005063 solubilization Methods 0.000 description 1
- 230000037351 starvation Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
- B29C33/60—Releasing, lubricating or separating agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2030/00—Pneumatic or solid tyres or parts thereof
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention provides a green tyre external spray liquid and a preparation method thereof, wherein the green tyre external spray liquid comprises the following components in parts by mass: 8-15 parts of natural latex, 5-8 parts of carboxyl or sulfonic modified synthetic latex, 2-4 parts of surfactant, 0.5-1.5 parts of filler and 75-88 parts of deionized water. The external spray liquid for the green tire has the advantages of simple integral formula, convenient manufacture and low production cost, and can effectively reduce the vulcanization defect of the tire, so that the tire has an excellent appearance. The carboxyl or sulfonic modified synthetic latex and the natural latex are compounded according to a certain proportion to play a role in synergy, and a layer of elastic film which is strongly adhered with rubber is formed on the surface of the green tire, so that the tire is easily and completely separated from the mold.
Description
Technical Field
The invention relates to the field of vulcanization release agents, in particular to a green tire external spray and a preparation method thereof.
Background
In the production of tires, a vulcanization process is required, and the vulcanization process generally adopts a mode of model pressurization. The vulcanization is characterized in that the outer surface of the rubber green body is contacted with a metal mold, the inner surface of the rubber green body is contacted with a capsule, and the inflated capsule generates pressure on the green body and the metal mold in the vulcanization process so as to assist in forming patterns on the outer surface and the inner surface of the tire. In order to prevent the adhesion between the green tire and the metal mold, a release agent is required. Some of the release agents now on the market must be reapplied to the mold surface prior to the manufacture of each tire, and as the release agent is repeatedly used, the release agent accumulates on the mold surface to form scale, which can cause mold surface features to be not clearly printed onto the surface of the tire, and starvation, blistering, etc. to destroy the integrity of the tire surface. The use of the release agent also requires that the vulcanizer stands on a high temperature vulcanizing machine to spray, the high temperature easily causes unsafe working environment of the worker, and the release agent gasified at the high temperature also affects the health of the worker. Aiming at the problems and defects existing in the prior art, the research and development of the liquid spraying outside the green tyre has important significance.
Disclosure of Invention
The invention provides a green tyre external spray liquid and a preparation method thereof, and the specific technical scheme is as follows:
the green tyre external spray comprises the following components in parts by mass: 8-15 parts of natural latex, 5-8 parts of carboxyl or sulfonic modified synthetic latex, 2-4 parts of surfactant, 0.5-1.5 parts of filler and 75-88 parts of deionized water;
further, the synthetic latex is styrene-butadiene latex or neoprene latex;
further, the dosage mass ratio of the natural latex to the carboxyl or sulfonic acid group synthetic latex is 2-3:1, a step of;
further, the using amount mass ratio of the natural latex to the carboxyl or sulfonic acid group synthetic latex is 2:1, a step of;
further, the surfactant includes an anionic surfactant and a nonionic surfactant;
further, 1.0 to 2.5 parts by mass of anionic surfactant and 0.1 to 0.3 parts by mass of nonionic surfactant;
further, the anionic surfactant is one or more of alkylbenzene sulfonate, alkyl naphthalene sulfonate and alkyl glyceryl ether sulfonate;
further, the nonionic surfactant is one or more of fatty acid glyceride, polyethylene glycol fatty acid ester and polyethylene glycol;
further, the filler is an inorganic filler;
further, the inorganic filler is sodium bentonite;
a preparation method of a green tyre external spray comprises the following steps: dissolving a surfactant in deionized water, adding a filler, stirring for 30-50 minutes, grinding, adding natural latex and carboxyl or sulfonic modified synthetic latex, and stirring for 20-40 minutes at normal temperature;
further, the natural latex and the modified synthetic latex were added and stirred at room temperature for 30 minutes.
By adopting the technical scheme, the invention has the beneficial technical effects that:
1. the invention designs a green tyre external spray liquid, which is characterized in that carboxyl or sulfonic modified synthetic latex of the green tyre external spray liquid and natural latex are compounded according to a certain proportion to play a synergistic effect, and a layer of elastic film which is strongly adhered with rubber is formed on the surface of the green tyre, so that the tyre is easily and completely separated from a mould, the green tyre external spray liquid is free of silicone oil and organic solvent, and compared with the prior art, the scale deposition on the surface of the mould is avoided, and the characteristic structure of the surface of the mould cannot be clearly printed on the surface of the tyre;
2. the liquid spraying outside the green tyre can effectively reduce the vulcanization defect of the tyre and lead the tyre to have excellent appearance. The invention has the advantages of small dosage, short drying time, difficult precipitation, convenient operation and capability of using an air spray gun for spraying, thereby being capable of replacing a mould release agent;
4. the green tyre external spray liquid has the advantages of simple overall formula, convenient manufacture, low production cost and no pollution to the environment.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The green tyre external spray comprises the following components in parts by mass: 8-15 parts of natural latex, 5-8 parts of carboxyl or sulfonic modified synthetic latex, 2-4 parts of surfactant, 0.5-1.5 parts of filler and 75-88 parts of deionized water. The natural latex has good film forming performance, and the adhesive film formed during bonding has high elasticity and flexibility, but has poor ageing resistance and temperature resistance and poor adhesion with an adherend; compared with natural latex particles, the carboxyl or sulfonic modified synthetic latex has small particles, aging resistance, high temperature resistance and stronger bonding capability; an elastic film which is strongly adhered with rubber is formed on the surface of the green tyre, so that the tyre is easily and completely separated from the mould, in addition, the outer liquid spray of the green tyre is transparent after being vulcanized after being sprayed on the outer surface of the green tyre blank, and the appearance of the tyre is not affected.
The dosage ratio of the natural latex to the carboxyl or sulfonic modified synthetic latex is 2-3:1, the natural latex and the carboxyl or sulfonic modified synthetic latex are compounded according to a certain proportion to play a role in synergism, and an elastic film with stronger adhesiveness with raw rubber is formed after the natural latex and the carboxyl or sulfonic modified synthetic latex are dried.
The carboxyl or sulfonic acid modified synthetic latex is carboxyl or sulfonic acid modified styrene-butadiene latex or carboxyl or sulfonic acid modified neoprene latex, and the styrene-butadiene latex or neoprene latex is subjected to carboxyl or sulfonic acid modification, so that the temperature resistance and salt resistance stability are improved, and demulsification is not easy to occur; good dispersibility with natural latex and difficult flocculation.
The surfactant comprises anionic surfactant and nonionic surfactant, wherein the anionic surfactant is one or more of alkylbenzene sulfonate, alkyl naphthalene sulfonate and alkyl glyceryl ether sulfonate, and the nonionic surfactant is one or more of fatty glyceride, polyethylene glycol fatty acid ester and polyethylene glycol. Cationic surfactants are not suitable for use in this system because the carboxyl or sulfonic acid group modified synthetic latex is anionically modified. The surface tension of the product on the green tire rubber surface can be reduced by adding the surfactant, and the anionic surfactant has the effect of dispersing and suspending the filler, so that the emulsion stability is maintained; the nonionic surfactant is dispersed in the solution and has the functions of lubrication, dispersion, solubilization, static resistance and the like; the two surfactants are compounded and used, have excellent wettability, and are favorable for forming a complete elastic film on the surface of the green tire by spraying liquid outside the green tire, the film not only has good isolation effect, but also can keep the surface of the tire bright, resist static electricity, be difficult to adhere to dirt and the like after vulcanization, and the use of the tire protective agent or the tire modifying liquid is reduced.
The filler is inorganic filler, sodium bentonite can be selected, the sodium bentonite has good dispersibility in water medium, good suspension lubricity and good thermal stability, and can play a role in lubrication and isolation between the surface of a green tire and a mold as the filler, and good air exhaust property and mold flowability are provided in the vulcanization process.
Example 1
The liquid spraying outside the green tyre comprises the following components in parts by mass: 12 parts of natural latex, 6 parts of carboxyl modified styrene-butadiene latex, 2.5 parts of sodium dodecyl naphthalene sulfonate, 0.1 part of polyethylene glycol fatty acid ester, 1 part of sodium bentonite and 78.4 parts of deionized water.
The preparation method comprises the following steps:
78.4 parts of deionized water, 2.5 parts of sodium dodecyl naphthalene sulfonate and 0.1 part of polyethylene glycol fatty acid ester are added into a reaction kettle, stirred uniformly at normal temperature, then 1 part of sodium bentonite is added, stirred for 40 minutes, and 12 parts of natural latex and 6 parts of carboxyl modified styrene-butadiene latex are added after returning to the kettle by a grinding machine for one time, and stirred for 30 minutes at normal temperature to obtain the modified styrene-butadiene rubber.
Example 2
The liquid spraying outside the green tyre comprises the following components in parts by mass: 15 parts of natural latex, 5 parts of sulfonic modified styrene-butadiene latex, 1.7 parts of sodium dodecyl naphthalene sulfonate, 0.3 part of polyethylene glycol fatty acid ester, 0.5 part of sodium bentonite and 77.7 parts of deionized water.
The preparation method comprises the following steps:
adding 77.7 parts of deionized water, 1.7 parts of sodium dodecyl naphthalene sulfonate and 0.3 part of polyethylene glycol fatty acid ester into a reaction kettle, stirring uniformly at normal temperature, adding 0.5 part of sodium bentonite, stirring for 50 minutes, returning to the kettle by a grinding machine for the first time, adding 15 parts of natural latex and 5 parts of sulfonic modified styrene-butadiene latex, and stirring for 40 minutes at normal temperature.
Example 3
The liquid spraying outside the green tyre comprises the following components in parts by mass: 8 parts of natural latex, 8 parts of sulfonic modified neoprene latex, 2 parts of sodium dodecyl benzene sulfonate, 0.2 part of polyethylene glycol, 1.5 parts of sodium bentonite and 88 parts of deionized water.
The preparation method comprises the following steps:
88 parts of deionized water and 2 parts of sodium dodecyl benzene sulfonate, 0.2 part of polyethylene glycol are added into a reaction kettle, the mixture is stirred uniformly at normal temperature, 1.5 parts of sodium bentonite is added, the mixture is stirred for 30 minutes, 8 parts of natural latex and 8 parts of sulfonic modified neoprene latex are added after the mixture is returned to the kettle by a grinding machine for one time, and the mixture is stirred for 20 minutes at normal temperature.
Example 4
The liquid spraying outside the green tyre comprises the following components in parts by mass: 10 parts of natural latex, 6 parts of carboxyl modified neoprene latex, 3 parts of dodecylbenzene sulfonic acid, 1 part of polyethylene glycol, 1 part of sodium bentonite and 75 parts of deionized water.
The preparation method comprises the following steps:
adding 75 parts of deionized water, 3 parts of sodium dodecyl benzene sulfonate and 1 part of polyethylene glycol into a reaction kettle, stirring uniformly at normal temperature, adding 1 part of sodium bentonite, stirring for 30 minutes, returning to the kettle by a grinding machine for one time, adding 10 parts of natural latex and 6 parts of carboxyl modified neoprene latex, and stirring for 30 minutes at normal temperature.
Comparative example 1
The liquid spraying outside the green tyre comprises the following components in parts by mass: 6 parts of natural latex, 12 parts of carboxyl modified styrene-butadiene latex, 2.5 parts of sodium dodecyl naphthalene sulfonate, 0.1 part of polyethylene glycol fatty acid ester and 79.4 parts of deionized water.
The preparation procedure was as in example 1.
Comparative example 2
The liquid spraying outside the green tyre comprises the following components in parts by mass: 12 parts of natural latex, 2.5 parts of sodium dodecyl naphthalene sulfonate, 0.1 part of polyethylene glycol fatty acid ester, 1 part of sodium bentonite and 84.4 parts of deionized water.
The preparation procedure was as in example 1.
Comparative example 3
The liquid spraying outside the green tyre comprises the following components in parts by mass: 6 parts of carboxyl modified styrene-butadiene latex, 2.5 parts of sodium dodecyl naphthalene sulfonate, 0.1 part of polyethylene glycol fatty acid ester, 1 part of sodium bentonite and 90.4 parts of deionized water.
The preparation procedure was as in example 1.
The green tire-outside spray liquids prepared in examples 1 to 4 and comparative examples 1 to 3 were subjected to drying time and post-drying state test analysis to obtain the data shown in Table 1.
TABLE 1 drying time of the green tire external spray solutions prepared in examples 1 to 4 and comparative examples 1 to 3 and results of the post-drying state test
| Drying time/min | Uniformly brushing the film stock, observing the state after airing | |
| Example 1 | 9 | The formed elastic film is difficult to be torn off |
| Example 2 | 9 | The formed elastic film is difficult to be torn off |
| Example 3 | 10 | The formed elastic film is difficult to be torn off |
| Example 4 | 10 | The formed elastic film is difficult to be torn off |
| Comparative example 1 | 9 | The formed elastic film is easy to be torn off |
| Comparative example 2 | 10 | The elastic film formed, upon removal, is relatively intact |
| Comparative example 3 | 8 | Formed elastic film which is difficult to be torn off but is fragile |
As can be seen from the table, the drying time of the green tyre external spray liquid prepared in the examples 1-4 is less than or equal to 10min, the film forming time is short, and the production time cost can be saved; after drying, an elastic film with stronger adhesiveness with raw rubber is formed, which shows that the synergy between the natural latex and the carboxyl or sulfonic modified synthetic latex plays an important role in film forming. And the films formed by spraying the liquid outside the green tire prepared in comparative examples 2-3 have poor adhesion properties with the green tire.
Secondly, spraying the outer spray liquid of the green tyre prepared in the examples 1-4 and the comparative examples 1-3 on a raw rubber sheet (tread rubber or sidewall rubber) respectively, putting the raw rubber sheet into a self-made vulcanizing mold preheated in advance, performing vulcanization test on a flat vulcanizing machine to obtain a demolding effect, vulcanizing at 170 ℃ for 10min, and observing whether the vulcanized rubber sheet can be easily separated from the mold to judge an isolation effect, so as to obtain data shown in Table 2.
TABLE 2 isolation effects of spray liquid outside the green tire prepared in examples 1-4 and comparative examples 1-3
| Tread rubber | Sidewall rubber | |
| Example 1 | Good isolation effect | Good isolation effect |
| Example 2 | Good isolation effect | Good isolation effect |
| Example 3 | Good isolation effect | Good isolation effect |
| Example 4 | Good isolation effect | Good isolation effect |
| Comparative example 1 | Poor isolation effect | Poor isolation effect |
| Comparative example 2 | Poor isolation effect | Poor isolation effect |
| Comparative example 3 | Poor isolation effect | Poor isolation effect |
As can be seen from the above table, the external liquid spray of the green tire prepared in examples 1 to 4 has good isolation effect on tread rubber and sidewall rubber, and the reasonable proportion of the surfactant and the filler makes the isolation effect of the external liquid spray of the green tire significantly improved compared with that of comparative examples 1 to 3.
(III) destructive testing to verify the venting and mold flow.
Cutting raw rubber sheets into 1/5,2/5,3/5 and 4/5 (the raw rubber sheets have equal thickness and equal width) according to the length of a mould, spraying liquid spray samples outside the raw rubber sheets in examples 1-4 and comparative examples 1-3 respectively, placing the liquid spray samples into a self-made vulcanizing mould preheated in advance, carrying out vulcanization test demoulding effect on a flat vulcanizing machine, vulcanizing at 170 ℃ for 10min, and observing the size of the vulcanized rubber sheets in a mould cavity to judge the flowability of the mould and whether bulges in the vulcanized rubber sheets are used for judging the exhaust property.
TABLE 3 influence of the green tire outer spray prepared in examples 1 to 4 and comparative examples 1 to 3 on the air extraction and drainage properties of the green tire and the mold flowability
As can be seen from the above table, the green extra-tire spray prepared in examples 1-4 provided good air-drainage and in-mold flow to the green, and the green extra-tire spray prepared in examples 1-4 allowed the green to substantially fill the mold cavity when the green sheet was cut to 3/5, whereas the green extra-tire spray prepared in comparative examples 1-3 allowed the green to go short and out of the mold.
Therefore, the whole formula of the liquid spraying outside the green tire is simple, the manufacturing is convenient, the production cost is low, the tire vulcanization defect can be effectively reduced, and the tire has excellent appearance. The carboxyl or sulfonic modified synthetic latex and the natural latex are compounded according to a certain proportion to play a role in synergy, and a layer of elastic film which is strongly adhered with rubber is formed on the surface of the green tire, so that the tire is easily and completely separated from the mold.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (10)
1. The green tyre external spray is characterized by comprising the following components in parts by mass: 8-15 parts of natural latex, 5-8 parts of carboxyl or sulfonic modified synthetic latex, 2-4 parts of surfactant, 0.5-1.5 parts of filler and 75-88 parts of deionized water.
2. The green extra-corporeal spray of claim 1, wherein the synthetic latex is styrene-butadiene latex or neoprene latex.
3. The external green tyre spray according to claim 1, wherein the ratio of the natural latex to the carboxyl or sulfonic acid group synthetic latex is 2-3:1.
4. the external liquid spray for green tyre according to claim 3, wherein the mass ratio of the natural latex to the carboxyl or sulfonic acid group synthetic latex is 2:1.
5. the extra-green spray of claim 1 wherein the surfactant comprises an anionic surfactant and a nonionic surfactant.
6. The external liquid spray for green tyre according to claim 5, wherein the anionic surfactant is 1.0-2.5 parts by mass and the nonionic surfactant is 0.1-0.3 parts by mass.
7. The extra-green spray of claim 5 wherein the anionic surfactant is one or more of alkylbenzene sulfonate, alkylnaphthalene sulfonate, alkyl glyceryl ether sulfonate.
8. The external green tire spray of claim 5, wherein the nonionic surfactant is one or more of a fatty acid glyceride, a polyethylene glycol fatty acid ester, and a polyethylene glycol.
9. The green tyre extemal spray of claim 1, wherein the filler is an inorganic filler.
10. A method of preparing a green tyre extemal spray as claimed in any one of claims 1 to 9, comprising the steps of: dissolving surfactant in deionized water, adding filler, stirring for 30-50 min, grinding, adding natural latex and carboxyl or sulfonic modified synthetic latex, and stirring at normal temperature for 20-40 min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310046204.8A CN116079958A (en) | 2023-01-31 | 2023-01-31 | Green tyre external spray and preparation method thereof |
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| CN202310046204.8A CN116079958A (en) | 2023-01-31 | 2023-01-31 | Green tyre external spray and preparation method thereof |
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| CN116079958A true CN116079958A (en) | 2023-05-09 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1673261A (en) * | 2005-03-18 | 2005-09-28 | 清华大学 | Natural liquid rubber slurry with added carbon nanotube and its prepn process |
| CN101456961A (en) * | 2009-01-07 | 2009-06-17 | 中国热带农业科学院农产品加工研究所 | Method for preparing reactive nano calcium carbonate-native rubber composite material |
| CN102070998A (en) * | 2010-12-14 | 2011-05-25 | 浙江工业大学 | Automatic inflation tyre-repairing solution |
| CN110317380A (en) * | 2019-07-26 | 2019-10-11 | 蓝帆医疗股份有限公司 | A kind of butyronitrile gloves and preparation method thereof |
-
2023
- 2023-01-31 CN CN202310046204.8A patent/CN116079958A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1673261A (en) * | 2005-03-18 | 2005-09-28 | 清华大学 | Natural liquid rubber slurry with added carbon nanotube and its prepn process |
| CN101456961A (en) * | 2009-01-07 | 2009-06-17 | 中国热带农业科学院农产品加工研究所 | Method for preparing reactive nano calcium carbonate-native rubber composite material |
| CN102070998A (en) * | 2010-12-14 | 2011-05-25 | 浙江工业大学 | Automatic inflation tyre-repairing solution |
| CN110317380A (en) * | 2019-07-26 | 2019-10-11 | 蓝帆医疗股份有限公司 | A kind of butyronitrile gloves and preparation method thereof |
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