{"id":5376,"date":"2022-07-14T01:12:43","date_gmt":"2022-07-14T01:12:43","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=5376"},"modified":"2022-07-14T01:12:43","modified_gmt":"2022-07-14T01:12:43","slug":"epoxy-resin-curing-agent-and-its-curing-mechanism","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/pt\/epoxy-resin-curing-agent-and-its-curing-mechanism\/","title":{"rendered":"Tipos comuns de agente de cura de resina ep\u00f3xi e seu mecanismo de cura"},"content":{"rendered":"

Tipos comuns de agente de cura de resina ep\u00f3xi e seu mecanismo de cura<\/strong><\/h1>\n

Este artigo resume brevemente os tipos comuns de agente de cura de resina ep\u00f3xi e seu mecanismo de cura.<\/p>\n

1, agente de cura de classe alcalina WTF. incluindo diamina alif\u00e1tica e poliamina, poliamina arom\u00e1tica, outros compostos nitrogenados e amina alif\u00e1tica modificada. O efeito de cura das aminas prim\u00e1rias e secund\u00e1rias na resina ep\u00f3xi \u00e9 abrir o grupo ep\u00f3xi pelo hidrog\u00eanio ativo no \u00e1tomo de nitrog\u00eanio e torn\u00e1-lo reticulado. As poliaminas alif\u00e1ticas, como etilenodiamina, hexanodiamina, dietilenotriamina, trietilenotetramina, dietilaminopropilamina, etc., s\u00e3o mais ativas e podem fazer com que a resina ep\u00f3xi seja reticulada e curada em temperatura ambiente, enquanto as poliaminas arom\u00e1ticas s\u00e3o menos ativas, como a m-fenilenodiamina, que pode ser curada a 150\u00b0C.<\/p>\n

2\u3001Agente de cura do tipo \u00e1cido. Incluindo \u00e1cidos org\u00e2nicos, anidrido \u00e1cido e trifluoreto de boro e seus complexos. O \u00e1cido dib\u00e1sico e seu anidrido, como o anidrido maleico e o anidrido ft\u00e1lico, podem curar a resina ep\u00f3xi, mas devem ser cozidos em uma temperatura mais alta para curar completamente. O anidrido reage primeiramente com o grupo hidroxila na resina ep\u00f3xi para gerar um mono\u00e9ster, e o grupo carboxila no mono\u00e9ster e o grupo ep\u00f3xi passam por adi\u00e7\u00e3o e esterifica\u00e7\u00e3o para formar um \u00e9ster duplo.<\/p>\n

3 \u3001 Agente de cura de moldagem aditiva. Esse tipo de agente de cura e a rea\u00e7\u00e3o de adi\u00e7\u00e3o de ep\u00f3xi constituem uma parte do segmento da cadeia do produto de cura e, por meio da rea\u00e7\u00e3o de polimeriza\u00e7\u00e3o gradual, de modo que as mol\u00e9culas lineares se reticulam nas mol\u00e9culas da estrutura do corpo, esse tipo de agente de cura tamb\u00e9m \u00e9 conhecido como agente de cura do tipo mel\u00e3o.<\/p>\n

4\u3001Agente de cura catal\u00edtico. Esse tipo de agente de cura s\u00f3 \u00e9 usado na inicia\u00e7\u00e3o da resina ep\u00f3xi, abre o grupo ep\u00f3xi, a pr\u00f3pria polimeriza\u00e7\u00e3o da resina ep\u00f3xi catal\u00edtica em uma estrutura de rede, a gera\u00e7\u00e3o de liga\u00e7\u00f5es de \u00e9ter como a estrutura principal do homopol\u00edmero.<\/p>\n

5, aparente no tipo de agente de cura para o uso geral do agente de cura, pode ser dividido em polimeriza\u00e7\u00e3o por adi\u00e7\u00e3o e tipo catal\u00edtico. O tipo de polimeriza\u00e7\u00e3o de adi\u00e7\u00e3o que abre o anel do grupo ep\u00f3xi para a rea\u00e7\u00e3o de polimeriza\u00e7\u00e3o de adi\u00e7\u00e3o, o pr\u00f3prio agente de cura para participar da estrutura de rede tridimensional. Esse tipo de agente de cura, como a adi\u00e7\u00e3o de uma quantidade muito pequena, faz com que o produto de cura se conecte ao grupo ep\u00f3xi no final da rea\u00e7\u00e3o. Portanto, para esse tipo de agente de cura, h\u00e1 uma quantidade adequada; e o agente de cura catal\u00edtico \u00e9 uma forma cati\u00f4nica ou ani\u00f4nica de fazer a polimeriza\u00e7\u00e3o de adi\u00e7\u00e3o de anel do grupo ep\u00f3xi, o agente de cura n\u00e3o participa da estrutura da rede, portanto, n\u00e3o h\u00e1 rea\u00e7\u00e3o equivalente da quantidade adequada. No entanto, o aumento da dosagem tornar\u00e1 a velocidade de cura mais r\u00e1pida. No agente de cura do tipo aparente, dicianodiamida, diidrazida de \u00e1cido ad\u00edpico, essas variedades, em temperatura ambiente, n\u00e3o s\u00e3o dissolvidas na resina ep\u00f3xi e, em altas temperaturas, ap\u00f3s a dissolu\u00e7\u00e3o, come\u00e7am a curar a rea\u00e7\u00e3o e, portanto, tamb\u00e9m apresentam um estado latente, por isso podem ser chamadas de agente de cura latente funcional.<\/p>\n

6, o agente de cura latente refere-se \u00e0 resina ep\u00f3xi misturada com a estabilidade de prazo relativamente longo em condi\u00e7\u00f5es de temperatura ambiente. Geralmente, s\u00e3o necess\u00e1rios mais de 3 meses para ter maior valor pr\u00e1tico; o ideal \u00e9 meio ano ou mais de 1 ano. E s\u00f3 precisa ser exposto ao calor, \u00e0 luz, \u00e0 umidade e a outras condi\u00e7\u00f5es para iniciar a rea\u00e7\u00e3o de cura. Esse tipo de agente de cura \u00e9 basicamente um m\u00e9todo f\u00edsico e qu\u00edmico para fechar a atividade do agente de cura; essas variedades s\u00e3o chamadas de agente de cura latente; na verdade, podem ser chamadas de agente de cura latente funcional. Como a dicianodiamida e a resina ep\u00f3xi misturadas, a temperatura ambiente \u00e9 est\u00e1vel. Se a 145-165 \u2103, a resina ep\u00f3xi pode ser curada em 30 minutos; o complexo de boro triazida e etilamina tamb\u00e9m \u00e9 est\u00e1vel em temperatura ambiente, acima de 100 \u2103 quando a resina ep\u00f3xi pode ser curada.<\/p>\n

O agente de cura latente pode ser misturado \u00e0 resina ep\u00f3xi para formar um composto do tipo l\u00edquido, simplificando a aplica\u00e7\u00e3o de produtos de resina ep\u00f3xi. Sua gama de aplica\u00e7\u00f5es vai de um adesivo de embalagem \u00fanica a revestimentos, tintas de impregna\u00e7\u00e3o, compostos de envasamento, revestimentos em p\u00f3 e outros aspectos do desenvolvimento.<\/p>","protected":false},"excerpt":{"rendered":"

Tipos comuns de agente de cura de resina ep\u00f3xi e seu mecanismo de cura Este artigo resume brevemente os tipos comuns de agente de cura de resina ep\u00f3xi e seu mecanismo de cura. 1, agente de cura de classe alcalina WTF. incluindo diamina alif\u00e1tica e poliamina, poliamina arom\u00e1tica, outros compostos nitrogenados e amina alif\u00e1tica modificada. O efeito de cura das aminas prim\u00e1rias e secund\u00e1rias [...]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[114],"tags":[],"class_list":["post-5376","post","type-post","status-publish","format-standard","hentry","category-catalysts-chemical-auxiliary-agents"],"yoast_head":"\nCommon types of epoxy resin curing agent and its curing mechanism - Longchang Chemical<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/longchangchemical.com\/pt\/epoxy-resin-curing-agent-and-its-curing-mechanism\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Common types of epoxy resin curing agent and its curing mechanism - Longchang Chemical\" \/>\n<meta property=\"og:description\" content=\"Common types of epoxy resin curing agent and its curing mechanism This article briefly summarizes the common types of epoxy resin curing agent and its curing mechanism. 1, alkaline class curing agent WTF. including aliphatic diamine and polyamine, aromatic polyamine, other nitrogenous compounds and modified aliphatic amine. 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