Issue |
Silva Lusitana
Volume 28, Number 2, 2020
|
|
---|---|---|
Page(s) | 181 - 195 | |
DOI | https://doi.org/10.1051/silu/20202802165 | |
Published online | 20 January 2021 |
Polyterpene Resisns: Part I – A Brief Historical Review
Resinas de Politerpenos: Parte I – Uma Breve Revisão Histórica
Résines de Polyterpène : Partie I – Un bref aperçu historique
*
Superior Technical
**
Senior Researcher. Instituto Nacional de Investigação Agrária e Veterinária, I.P. Av. da República, Quinta do Marquês, 2780-159 Oeiras, Portugal
a E-mail: miguel.pestana@iniav.pt
The terpenic resins are polymers of low molecular weight hydrocarbons, obtained by cationic polymerization of terpenes. These products are used in the adhesives, sealants and wax coating industries.
Commercial adhesive resins are prepared from monoterpenes -the main ones are α-pinene, β-pinene and dipentene.
The softening point and molecular weight of polyterpene resins are critical for their main use (adherence).
Its adhesive behavior results from the relationship of the softening point with the molecular weight.
At the commercial level, polyterpene resins are produced by polymerization of terpene monomers. Batch and continuous systems are used.
The composition of an adhesive requires a wide knowledge of the materials available and the specific requirements of its application.
The most common types of adhesives are Pressure Sensitive Adhesives, Hot-melt Adhesives and Structural Adhesives.
Resumo
As resinas terpénicas são polímeros de hidrocarbonetos de baixo peso molecular, são obtidas pela polimerização catiónica de terpenos. Estes produtos são usados nas indústrias de adesivos, vedantes e ceras de revestimento.
As resinas adesivas comerciais são preparadas a partir dos monoterpenos -os principais são o α-pineno, β-pineno e dipenteno.
O ponto de amolecimento e o peso molecular das resinas de politerpenos são críticos para a sua principal utilização (aderência). O seu comportamento adesivo resulta da relação do ponto amolecimento com o peso molecular.
A nível comercial as resinas de politerpenos são produzidas por polimerização em solução de monómeros de terpenos. São usados sistemas batch e contínuo.
A composição de um adesivo requer um amplo conhecimento dos materiais disponíveis e dos requisitos específicos da sua aplicação.
Os tipos mais comuns de adesivos são os adesivos por sistemas sensíveis à pressão, adesivos de hot-melt e adesivos estruturais.
Résumé
Les résines terpéniques sont des polymères d’hydrocarbures de bas poids moléculaire, obtenus par polymérisation cationique de terpènes. Ces produits sont utilisés dans les industries des adhésifs, des mastics et des cires de revêtement.
Les résines adhésives commerciales sont préparées à partir de monoterpènes - les principaux sont l’α-pinène, le β-pinène et le dipentènes.
Le point de ramollissement et le poids moléculaire des résines de polyterpène sont essentiels pour leur utilisation principale (adhérence). Son comportement adhésif résulte de la relation du point de ramollissement avec le poids moléculaire.
Au niveau commercial, les résines de polyterpène sont produites par polymérisation dans une solution de monomères terpéniques. Des systèmes discontinus et continus sont utilisés.
La composition d’un adhésif nécessite une large connaissance des matériaux disponibles et des exigences spécifiques de son application.
Les types d’adhésifs les plus courants sont les adhésifs sensibles à la pression, les adhésifs thermofusibles et les adhésifs structuraux.
Key words: Turpentine / derivates / production / chemistry / physical properties / applications / types of Adhesives
Palavras-chave: Aguarrás / derivados / produção / química / propriedades físicas / aplicações / tipos de adesivo
Mots clés : Essence de térébenthine / dérives / production / chimie / propriétés physiques / applications / types d’adhésifs
© INIAV, Oeiras, Portugal 2020
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