BRPI1103251A2 - biodegradable vulcanized rubber composition, vulcanization process and resulting product - Google Patents
biodegradable vulcanized rubber composition, vulcanization process and resulting product Download PDFInfo
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- 239000000203 mixture Substances 0.000 title claims abstract description 53
- 238000004073 vulcanization Methods 0.000 title claims abstract description 22
- 239000004636 vulcanized rubber Substances 0.000 title abstract description 5
- 229920001971 elastomer Polymers 0.000 claims abstract description 22
- 239000005060 rubber Substances 0.000 claims abstract description 17
- 229920003052 natural elastomer Polymers 0.000 claims abstract description 15
- 229920001194 natural rubber Polymers 0.000 claims abstract description 15
- 244000043261 Hevea brasiliensis Species 0.000 claims abstract description 14
- 235000013312 flour Nutrition 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 12
- 235000013311 vegetables Nutrition 0.000 claims abstract description 11
- 239000000806 elastomer Substances 0.000 claims abstract description 6
- 229920003051 synthetic elastomer Polymers 0.000 claims abstract description 6
- 239000005061 synthetic rubber Substances 0.000 claims abstract description 6
- 235000014643 Orbignya martiana Nutrition 0.000 claims abstract description 5
- 244000021150 Orbignya martiana Species 0.000 claims abstract description 5
- 239000000843 powder Substances 0.000 claims abstract description 5
- 235000013162 Cocos nucifera Nutrition 0.000 claims abstract description 3
- 244000060011 Cocos nucifera Species 0.000 claims abstract description 3
- 239000000654 additive Substances 0.000 claims description 11
- 241000196324 Embryophyta Species 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 229910052717 sulfur Inorganic materials 0.000 claims description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 6
- 239000011593 sulfur Substances 0.000 claims description 6
- 239000004614 Process Aid Substances 0.000 claims description 4
- 229920001195 polyisoprene Polymers 0.000 claims description 3
- 239000003963 antioxidant agent Substances 0.000 claims description 2
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 2
- 239000000975 dye Substances 0.000 claims description 2
- 239000000194 fatty acid Substances 0.000 claims description 2
- 229930195729 fatty acid Natural products 0.000 claims description 2
- 150000004665 fatty acids Chemical class 0.000 claims description 2
- 239000012188 paraffin wax Substances 0.000 claims description 2
- 229920002857 polybutadiene Polymers 0.000 claims description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 claims 2
- 239000011707 mineral Substances 0.000 claims 2
- 240000006890 Erythroxylum coca Species 0.000 claims 1
- 235000008957 cocaer Nutrition 0.000 claims 1
- ZPUCINDJVBIVPJ-LJISPDSOSA-N cocaine Chemical compound O([C@H]1C[C@@H]2CC[C@@H](N2C)[C@H]1C(=O)OC)C(=O)C1=CC=CC=C1 ZPUCINDJVBIVPJ-LJISPDSOSA-N 0.000 claims 1
- 229920003211 cis-1,4-polyisoprene Polymers 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 12
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- 229920003023 plastic Polymers 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 6
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- 238000002347 injection Methods 0.000 description 3
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- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 238000006065 biodegradation reaction Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 229920005610 lignin Polymers 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 150000003463 sulfur Chemical class 0.000 description 2
- 239000004156 Azodicarbonamide Substances 0.000 description 1
- 241000146399 Ceriporiopsis Species 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 241000146398 Gelatoporia subvermispora Species 0.000 description 1
- 244000068988 Glycine max Species 0.000 description 1
- 235000010469 Glycine max Nutrition 0.000 description 1
- 239000004609 Impact Modifier Substances 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 239000006057 Non-nutritive feed additive Substances 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 102000004316 Oxidoreductases Human genes 0.000 description 1
- 108090000854 Oxidoreductases Proteins 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 240000000111 Saccharum officinarum Species 0.000 description 1
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- 229920003232 aliphatic polyester Polymers 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- XOZUGNYVDXMRKW-AATRIKPKSA-N azodicarbonamide Chemical compound NC(=O)\N=N\C(N)=O XOZUGNYVDXMRKW-AATRIKPKSA-N 0.000 description 1
- 235000019399 azodicarbonamide Nutrition 0.000 description 1
- 235000008429 bread Nutrition 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
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- 238000007796 conventional method Methods 0.000 description 1
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- 229920003244 diene elastomer Polymers 0.000 description 1
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- 239000003063 flame retardant Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000035876 healing Effects 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- 239000010903 husk Substances 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 229920003049 isoprene rubber Polymers 0.000 description 1
- 239000004611 light stabiliser Substances 0.000 description 1
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- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000002207 metabolite Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 125000002524 organometallic group Chemical group 0.000 description 1
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- 238000000197 pyrolysis Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
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Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
"COMPOSIÇçO DE BORRACHA VULCANIZADA BIOEGRADÁVEL, PROCESSO DE VULCANIZAÇçO E PRODUTO RESULTANTE". É descrita uma composição de borracha, baseada em uma borracha natura ou elastômero cis 1,4-pollisopreno, a qual é biodegradável mesmo após a sua vulcanização. A dita composição apresenta, entre outros, uma farinha celulósica de vegetais, preferencialmente o pó de coco de babaçu, e um óleo láurico de origem vegetal, além de, eventualmente uma borracha sintética. São também descritos o processo de vulcanização e os produtos resultantes."BIOEGRADABLE VULCANIZED RUBBER COMPOSITION, VOLCANIZATION PROCESS AND RESULTING PRODUCT". A rubber composition based on a natural rubber or cis 1,4-polyisoprene elastomer is described which is biodegradable even after vulcanization. Said composition comprises, among others, a cellulosic vegetable flour, preferably babassu coconut powder, and a lauric oil of vegetable origin, as well as possibly a synthetic rubber. Also described is the vulcanization process and the resulting products.
Description
Composi^ao de borracha vulcanizada biodegradavel, pirocessc» de -vulcanizagao eBiodegradable vulcanized rubber composition, pyrolysis of volcanization and
produto resultante.resulting product.
A presente invengao se refere a unma composisao de borracha vulcanizada, a qual apresenta a caracteristica de s«er biode:gracOavel·. Ademais, a presente inven^ao se refere ainda a um processo para a vul»caniza?so da composigao de borracha biodegradavel, bem como aos produtos resuItantes de tal v-ulcaBiizagSo.The present invention relates to a vulcanized rubber composition which has the characteristic of biode: graceful ether. Furthermore, the present invention further relates to a process for the vulcanization of the biodegradable rubber composition, as well as to the products resulting from such biodegradation.
Conforme amplamente conhecsido, a borracha natural, ou seja ο elastomero cis 1,4-poliisopreno, tambem conhecida na art«e como Hevea Brasiliensis (planta da qual e extraida), apresenta uma cairacteristiica plastica iitil para algumas aplicagdes. Nao obstante, a maioria das aplicagdes para a borraacha natural e na sua forma vulcanizada. Atraves da vulcanizagao, processo que esnvol*ve a adi?ao de compostos contendo enxofre alem da submissao da massa die realizagao sobre condig5es controladas de pressao e de temperatura, ocorre a conheecida transformagao do estado plastico para ο estado elastico. As borrachas vulcacanizadss podem assim ser utilizadas para a fabricagao de pneus, solados de calgados, estruturais des amortecimento bem como inCimeras outras aplicagoes tanto industriais quanteo domesticas.As is well known, natural rubber, i.e. cis 1,4-polyisoprene elastomer, also known in the art as Hevea Brasiliensis (plant from which it is extracted), exhibits a useful plastic characteristic for some applications. However, most applications for natural rubber are in their vulcanized form. Through vulcanization, a process which involves the addition of sulfur-containing compounds in addition to the submission of the mass under controlled pressure and temperature conditions, the known transformation of the plastic state to the elastic state occurs. Vulcanized rubbers can thus be used for the manufacture of tires, footwear soles, cushioning structures as well as numerous other industrial as well as domestic applications.
Como conseqQencia do proc=esso d'e \rulcanizagao, a borracha perde a sua caracteristica natural de biodegracflabilidad-e. Como uma das decorrencias deste fato, pode-se citar, por exemplo, ο gig-antesco prolblema atual de descarte dos pneus usados, posto que a sua decomposigao »e extrermamente demorada. O mesmo problema tambem e enfrentado pelas sociedades modemas em relagao aos plasticos em geral. Apenas para citar um exemplo, diversas s -ao as campsnhas atuais no sentido de cessar ο uso das sacolas plastica de supermercaodo, retorrnanodo ao emprego de sacos de papel ou se sacolas nao descartaveis. Como uma tentativa para tentsar redusir ο problema doAs a consequence of the process of ruling, rubber loses its natural biodegradability characteristic. As a consequence of this fact, one can cite, for example, the gig- rather the current discarding problem of used tires, since their decomposition is extremely time consuming. The same problem is also faced by modern societies in relation to plastics in general. To cite just one example, there are several current camps to cease the use of super-plastic plastic bags, return to the use of paper bags or non-disposable bags. As an attempt to try to reduce the problem of
descarte destes plasticos (naturais ou de engenharia), nos ul"timo-s vem sendo desenvolvidas diversas tecnicas para ο seu reaproveitamento . Assim, ganrafas PET vem sendo transformadas em tecidos, pneus, agregados para ο asfalto eentre tantas outras solugoes. De qualquer forma, tais tecnicas sao meramente psaliativas^, um ia vez que nao eliminam ο problema, mas simplesmente dao uma destinagao diversa pasra os produtos envolvidos. Nao obstante, estes novos produtos continusm a existrar, meramente postergando ο problema do seu descarte.Disposal of these plastics (natural or engineered), in the last several techniques have been developed for their reuse. Thus, PET bottles have been transformed into fabrics, tires, aggregates for asphalt and among many other solutions. Such techniques are merely palliative, since they do not eliminate the problem, but simply give a different destination to the products involved, but these new products continue to exist, merely postponing the problem of their disposal.
Em relapao especificamente as borracha s vunlcanizadas, os documentos JP 2006180822 e JP 2007000109 sao relat ivos mi-croo rganismos de laborat0rio destinados a degradar as borrachas vulcanizadas, e erra especial as borrachas de isopreno contendo negro de fumo. Nao obstante a ionpoBrtancia destes microorganismos na solugao do problema de descarte dos pn eus usaados, ainda e cedo para avaliar a sua eficacia, bem como as eventuais precaug5es necessarians de introduzir 2^/5 tais microorganismos em um ambiente fora da sarea controlada de um laboratorio.Specifically with respect to rubber being vulcanised, JP 2006180822 and JP 2007000109 are related laboratory microorganisms designed to degrade vulcanized rubbers, and especially carbon black containing isoprene rubbers. Notwithstanding the importance of these microorganisms in solving the discard problem of the used breads, it is still early to assess their effectiveness, as well as any precautions necessary to introduce such microorganisms in an environment outside the controlled area of a laboratory. .
Outra tecnica empregada para mudar as caracteristicas de biodegradabilidade dos plasticos em geral e relativa a inclusao de compostos de amido juntamente com os monomeros, aos quaiis p_odem ser adicionados outros compostos para manter as inalteradas ou compensar as c=aracteristicas do polimero nao misturado. Tais solugdes, cuja origem remonta a mais de 20 anos, nao tem se mostrado eficientes posto que a mistura destes compostos resulta extremamente complicada, necessitando de altas temperaturas e agitagao intensa, salem de que os polimeros resultantes apresentam caracteristicas de degradagao eextremamente aceleradas. io Por fim, uma soluigao recentemente publicada se refere,Another technique employed to change the biodegradability characteristics of plastics in general is related to the inclusion of starch compounds together with the monomers, to which other compounds may be added to keep them unchanged or to compensate for the c = characteristics of the unmixed polymer. Such solutions, which originate more than 20 years ago, have not been shown to be efficient since the mixing of these compounds is extremely complicated, requiring high temperatures and intense agitation, as the resulting polymers exhibit extremely accelerated degradation characteristics. Finally, a recently published solution refers,
conforme ο documento EP 1749855 publicaido e^m 07/02/2007, a uma composigao a base de borracha para a produgao de pneus vulc^anizsados, os quais podem ser biodegradados por microorganismos, em particular ο fuungo ceriporiopsis subvermispora, Iigado a deslignificagao da madeira. Mais especificamemte, a Ceriporiopsis subvermispora e um exemplo de fungo capaz de promover a degradsgao seletiva da lignina. A capacidade de degradar a lignina e devida ao seu sisteema enzimatico extracelular nao-especifico com posto por Iacase (Lac) e manganes-peroxiedase (MnP)1 que funcionam juntamente com oxidases produtoras de H2O2 e metabo Iitos de baixa massa molar. Basicamente1 tal composigao compreende 100 partes em pes^o des uma borracha natural ou de dieno, e de 0,5 a 80 partes em peso de um poliester alif^tico biodegradavel, entre outros.according to EP 1749855 published on 07/02/2007 to a rubber-based composition for the production of vulcanized tires which can be biodegraded by microorganisms, in particular to the subprispore fungi ceriporiopsis. wood. More specifically, Ceriporiopsis subvermispora is an example of a fungus capable of promoting selective lignin degradation. The ability to degrade lignin is due to its nonspecific extracellular enzyme system composed of Iacase (Lac) and manganese peroxyhedase (MnP) 1 which function together with low-mass H2O2-producing oxidases and metabolites. Basically, such a composition comprises 100 parts by weight of a natural or diene rubber, and from 0.5 to 80 parts by weight of a biodegradable aliphatic polyester, among others.
Desta forma, ai nda existe um marcante deficit no mercado em relagao aos produtos de borracha vulcaniizads, em particular os biodegradaveis.Thus, there is still a marked deficit in the market for vulcanized rubber products, in particular biodegradable ones.
Desta forma, co.nstitiui um escopo da presente invengao uma composigao a base de borracha natural a qual, imesmo apos vulcanizagao, mantenha a caracteristica de biodegradabilidade da borra‘cha tinatural.Accordingly, a scope of the present invention is comprised of a natural rubber-based composition which, even after vulcanization, retains the biodegradability characteristic of tinatural rubber.
Ademais1 consti'tui unm outro escopo da presente invengao um processo de vulcanizagao para uma comiposiQao a base de borracha natural, do qual resulte um produto de borracha natural vulcanizacila biodegradavel.In addition, another scope of the present invention is a vulcanization process for a natural rubber based composition, which results in a biodegradable natural rubber product.
Ainda mais, con stitui um escopo da presente invengao um produto biodegradavel, sem a necessidacde cie incluir a adigao de amido ou a necessidade de atua^ao de microorganismos sinteticos, na sua biodegradagao.Further, a scope of the present invention is a biodegradable product, without the need to include starch addition or the need for synthetic microorganisms to act upon its biodegradation.
Estes e outros eobjeBivos sao alcangados a partir de uma composigao de borracha, biodegradavel sap0ss vulcanizagao, compreendendo, em percentual em peso, com relagao ao peso tcrtal dDa composigao final: de 45% a 70% de borracha natural ou elastomero cis 1,4-poliiseopre .no; ate 20% de borracha sintetica; de 8% a 25% de farinha celulosica de vegetais; dea 1% a 5% de oleo Iaurico de origem vegetal; ate 10% de uma carga mineral; de S% an 8% de agentes e/ou aceleradores deThese and other objects are achieved from a biodegradable rubber composition based on vulcanization, comprising, by percentage, by weight, based on the final composition: from 45% to 70% natural rubber or cis-elastomer 1,4- polyiseopre; no; up to 20% synthetic rubber; from 8% to 25% vegetable cellulosic flour; 1% to 5% lauric oil of vegetable origin; up to 10% of a mineral filler; % S 8% of agents and / or accelerators of
vulcanizagao a base de enxofre; e ate 10% de aditfivos. Além disto, constitui também outro objeto da presente invenção um processo de vulcanização de uma composição de borracha biodegradável, compreendendo submeter a vulcanização a dita composição de borracha, tal como supra, a uma temperatura entre 100° e 180° C, por um tempo de vulcanização entre 1 minuto e 10 horas, a uma pressão mínima de 100 bar.sulfur based vulcanization; and up to 10% additives. Further, it is also another object of the present invention to process a vulcanization of a biodegradable rubber composition comprising vulcanizing said rubber composition as above at a temperature between 100 ° and 180 ° C for a time of vulcanization between 1 minute and 10 hours at a minimum pressure of 100 bar.
Como dito, a composição da presente invenção está baseada em uma borracha natural, ou seja, de elastômero eis 1,4-poliisopreno, extraído a partir da Hevea Brasiliensis, tal como amplamente conhecido. A borracha natural é introduzida na composição, de acordo com a presente invenção, em uma quantidade, em particular, de 45% a 70% em peso. Em particular, uma faixa preferencial de adição da borracha natural está entre 50% e 60% em peso.As said, the composition of the present invention is based on a natural rubber, ie, useful 1,4-polyisoprene elastomer, extracted from Hevea Brasiliensis, as widely known. Natural rubber is introduced into the composition according to the present invention in an amount, in particular, from 45% to 70% by weight. In particular, a preferred range of addition of natural rubber is between 50% and 60% by weight.
Além da borracha supra, a composição da invenção também inclui a adição de uma borracha sintética, em particular o 1,4-polibutadieno, o qual integra a composição dentro de uma faixa de até 20% em peso. A presença de uma borracha sintética, como revelaram os testes, incrementa a resistência a abrasão do produto final, sem comprometer a sua biodegradabilidade. No caso do produto final ser um solado para calçado, tal característica é importante em relação ao seu uso e vida útil.In addition to the above rubber, the composition of the invention also includes the addition of a synthetic rubber, in particular 1,4-polybutadiene, which integrates the composition within a range of up to 20% by weight. The presence of a synthetic rubber, as revealed by the tests, increases the abrasion resistance of the final product without compromising its biodegradability. If the end product is a shoe sole, this feature is important in terms of its use and service life.
O terceiro componente da composição da invenção é uma farinha celulósica de vegetais. Mais em particular, tal produto é um pó fibroso formado a partir da moagem, entre outros, de partes de estruturas vegetais, excetuando-se as estruturas vegetais que compreendam amido. A farinha é responsável pela dureza do produto, que varia de maleável para os sapatos masculinos a rígido para os calçados femininos. Contudo, o teor da farinha celulósica deve ser controlado, posto que, um seu excesso poderia fazer com que o solado ficasse extremamente rígido e, portanto, quebradiço. Assim, a participação da farinha de celulose na composição é limitada a faixa entre 8% e 25%, porém sendo preferencial a faixa compreendida entre 12% e 20% em peso.The third component of the composition of the invention is a cellulosic vegetable flour. More particularly, such a product is a fibrous powder formed from the milling, inter alia, of parts of plant structures, except for plant structures comprising starch. Flour is responsible for the hardness of the product, which varies from malleable for men's shoes to hard for women's shoes. However, the content of the cellulosic flour must be controlled, since too much of it could make the sole extremely rigid and therefore brittle. Thus, the participation of cellulose flour in the composition is limited to between 8% and 25%, but preferably between 12% and 20% by weight.
Preferencialmente, a farinha é o produto comercialmente conhecido como "pó de coco de babaçu". Em particular, tal produto é resultante da moagem das nozes do babaçu (Orbygnia), o qual é isento de amido. Alternativamente, podem ser empregadas outras farinhas de origem vegetal similares, obtidas a partir de outras espécies vegetais e/ou de outras partes da planta, tais como de casca de arroz, de trigo, de soja, de cana de açúcar, etc. De qualquer forma, a farinha também pode ser composta a partir de uma mistura de farinhas de origens diversas, tais como as especificadas acima.Preferably, flour is the product commercially known as "babassu coconut powder". In particular, such a product is the result of grinding babassu nuts (Orbygnia) which is starch free. Alternatively, other flours of similar plant origin, obtained from other plant species and / or other parts of the plant, such as rice husk, wheat, soybean, sugar cane, etc. may be employed. In any case, flour may also be composed from a mixture of flour of various origins, such as those specified above.
Outro componente da composição, de acordo com a presente invenção, é o óleo láurico de origem vegetal, um auxiliar de processos naturais, o qual é empregado na composição final com teores entre 1 e 5% em peso. Alem disto, é prevista a incorporação de uma carga mineral a fim de melhorar as características do produto resultante. A carga mineral é uma carga convencional e a sua utilização é limitada a uma quantidade de até 10% em p'eso, com relação ao peso total da composição.Another component of the composition according to the present invention is lauric oil of vegetable origin, a natural process aid, which is employed in the final composition with contents of between 1 and 5% by weight. In addition, a mineral filler is envisaged to improve the characteristics of the resulting product. The mineral filler is a conventional filler and its use is limited to an amount of up to 10% by weight, based on the total weight of the composition.
Além disto, a composcição da presente invenção ainda inclui,In addition, the composition of the present invention further includes,
preferencialmente, um ou mais compostos tradiciomais baseados em enxofre, compostos estes que podem atuar tanto como agente de vulccanização, quanto como aceleradores de reação. No caso de se utilizar um derivado de enxofre, o percentual supra deve ser calculado em relação especificação a fração d'o enxofre no derivado de enxofre. Basicamente não existem preferências em relação aos agentes de vulcanização escolhidos, desde que os mesmos se prestem a vulcanização tanto de borrachas naturais quanto de sintéticas. Além disto, a quanti-dade empregada na composição, de acordo com a invenção, está entre 2% e 8%.preferably one or more sulfur-based traditional compounds, which compounds may act as both vulcanizing agent and reaction accelerators. If a sulfur derivative is used, the above percentage shall be calculated with respect to specification of the sulfur fraction in the sulfur derivative. Basically there are no preferences regarding the vulcanizing agents chosen as long as they lend themselves to vulcanization of both natural and synthetic rubbers. In addition, the amount employed in the composition according to the invention is between 2% and 8%.
Alternativamente, a cmra da composição pode ser feita a partir de um peróxido, de acordo com a técnica cormhecida. Outra alternativa para a cura é através do emprego de um isocianato, técnica esta também conhecida na arte. Ademais, e em função do processo de cura selecionado, podem ser incluídos na composição aditivos específicos para cada reação, ®ais como iniciadores de reação e/ou aceleradores de reação, as formas de uso e o quantitativo destes aditivos sendo de amplo conhecimento da arte.Alternatively, the composition may be made from a peroxide according to the known technique. Another alternative for healing is the use of an isocyanate, a technique also known in the art. In addition, and depending on the curing process selected, specific additives for each reaction, such as reaction initiators and / or reaction accelerators, may be included in the composition, the forms of use and the quantity of these additives being well known in the art. .
Por fim, a composição cia invenção ainda pode compreender um ou mais aditivos, tais como antioxidantes (até 2*% em peso), antiozonantes (até 4% em peso), bem como outros aditivos necessários e/ou de interesse para o produto final. Opcionalmente, a composição da presente invenção pode compreender outros aditivos conhecidos na arte incluindo, mas não limitado a, es®abilizantes, tais como estabilizantes de cor, estabilizantes de calor, estabilizantes de luz= protetores de UV, absorventes de UV, retardadores de chama, agentes anti-gotejament-Ό, lubrificantes, promotores de fluxo e outros auxiliares de processamento; plas~tificantes, agentes anti-estático, desmoldantes, modificadores de impacto. Dentre os auxiliares de processo empregados, cabe destacar o emprego de ácidos graxos e de agertttes de proteção a base de parafina, os quais são introduzidos na composição em uma quantidade de até 6% em peso.Finally, the composition of the invention may further comprise one or more additives, such as antioxidants (up to 2% by weight), anti-zonants (up to 4% by weight), as well as other additives required and / or of interest to the final product. . Optionally, the composition of the present invention may comprise other additives known in the art including, but not limited to, stabilizers such as color stabilizers, heat stabilizers, light stabilizers = UV protectors, UV absorbers, flame retardants. anti-drip agents, lubricants, flow promoters and other processing aids; plasticizers, antistatic agents, release agents, impact modifiers. Among the process aids employed, it is worth mentioning the use of fatty acids and paraffin-based protection agents, which are introduced in the composition in an amount of up to 6% by weight.
Em particular, e tendo ertn vista a destinação preferencial da composição, de acordo com a presente invenção, há · de se ressaltar a possibilidade de adição de corantes e/ou pigmentos, os quais podem ser orgânicos, inorgânicos ou organometálicos, e aditivos similares. A previsão de tais aditivos é relevante e a inclusão destes na composição pode seguir os mais diversos pparâmetros e formas operacionais, tendo em vista o efeito final desejado (monocromático, multicolorido, compondo desenhos, padrões e etc.). Por fim, o processo de vulcanização da composição, d-e acordo com a invenção, prevê a vulcanização da composição com uma temperatursa compreendida entre 100° e 180° C, com um tempo de vulcanização entre 1 minuto e 1G0 horas, a uma pressão mínima de 100 bar. Para a vulcanização, podem ser empregadoss quaisquer tipos de moldes conhecidos, tais como os moldes em duas ou mais partes-, aquecidos ou não, etc. Ademais, a vulcanização pode ocorrer no momento da injeção ou diretamente no molde, também conforme a técnica convencional. No primeiro caso utiliza-se um aumento na quantidade de aceleradores de modo a poder fazer a curai durante o tempo de injeção.In particular, and in view of the preferred destination of the composition according to the present invention, the possibility of adding dyes and / or pigments which may be organic, inorganic or organometallic, and similar additives should be emphasized. The prediction of such additives is relevant and the inclusion of them in the composition can follow the most diverse parameters and operational forms, in view of the desired final effect (monochrome, multicolored, composing drawings, patterns, etc.). Finally, the vulcanization process of the composition according to the invention provides for the vulcanization of the composition with a temperature of from 100 ° to 180 ° C, with a vulcanization time of between 1 minute and 1 hour at a minimum pressure of 100 bar. For vulcanization, any known mold type can be employed, such as two or more part molds, heated or not, etc. In addition, vulcanization may occur at the time of injection or directly into the mold, also according to conventional technique. In the first case an increase in the amount of accelerators is used in order to be able to cure during the injection time.
Em uma forma alternativa de realização, a composição podes ser produzida/comercializada na forma de placas semi-rigidas, a partir da injeção/depósito da composição sem que ocorra a sua vulcanização. Desta forma, uma placa assim obtida pode ser armazenada e apenas posteriormente vulcanizada, conforme a necessidade.In an alternative embodiment, the composition may be produced / marketed as semi-rigid plates from injection / deposition of the composition without vulcanization occurring. In this way, a plate thus obtained can be stored and only later vulcanized as required.
Em uma outra forma de realização da invenção, a composição pode ser expandida, dando origem assim a um produto final particular e interessante. Neste caso, existe a necessidade de se adicionar na composição a azodicarbonamida, em uma quantidade em peso de até 5%, e preferencialmente entre 3- 4% em peso.In another embodiment of the invention, the composition may be expanded, thereby giving rise to a particular and interesting end product. In this case, there is a need to add azodicarbonamide in the composition in an amount by weight of up to 5%, and preferably between 3-4% by weight.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BRPI1103251 BRPI1103251A2 (en) | 2011-07-06 | 2011-07-06 | biodegradable vulcanized rubber composition, vulcanization process and resulting product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BRPI1103251 BRPI1103251A2 (en) | 2011-07-06 | 2011-07-06 | biodegradable vulcanized rubber composition, vulcanization process and resulting product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BRPI1103251A2 true BRPI1103251A2 (en) | 2013-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BRPI1103251 BRPI1103251A2 (en) | 2011-07-06 | 2011-07-06 | biodegradable vulcanized rubber composition, vulcanization process and resulting product |
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| Country | Link |
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| BR (1) | BRPI1103251A2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10179479B2 (en) | 2015-05-19 | 2019-01-15 | Bridgestone Americas Tire Operations, Llc | Plant oil-containing rubber compositions, tread thereof and race tires containing the tread |
-
2011
- 2011-07-06 BR BRPI1103251 patent/BRPI1103251A2/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10179479B2 (en) | 2015-05-19 | 2019-01-15 | Bridgestone Americas Tire Operations, Llc | Plant oil-containing rubber compositions, tread thereof and race tires containing the tread |
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