{"id":3414,"date":"2020-03-15T12:21:16","date_gmt":"2020-03-15T12:21:16","guid":{"rendered":"https:\/\/resin-expert.com\/?p=3414"},"modified":"2023-09-24T19:35:16","modified_gmt":"2023-09-24T19:35:16","slug":"polyurethane-glue","status":"publish","type":"post","link":"https:\/\/resin-expert.com\/en\/guide\/polyurethane-glue","title":{"rendered":"Polyurethane Glue Guide \u2013 Urethane Applications and Tutorials"},"content":{"rendered":"

There are many different adhesives available on the market which have different properties and are more or less suitable for really firm bonding. One of these adhesives is polyurethane adhesive – an adhesive that can stand out with many favorable properties. But what is polyurethane adhesive? We will explain it to you – in our PU adhesive guide.<\/strong><\/p>\n

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What Is Polyurethane Glue?<\/h2>\n

Polyurethane adhesives, also known as PU adhesives, are adhesives used for higher strength constructions and can be used as both inelastic and permanently elastic adhesives<\/strong>. They are based on polymers, but often contain other components such as various additives.<\/p>\n

PU adhesives are often used as two-component adhesives. But there are also one-component adhesives available. Both are based on the chemical reaction of different ingredients. This reaction often involves catalysts such as light, heat, or moisture. The glue is paste-like and shrink-free. Once it has cured, it is waterproof and can be painted or sanded. The adhesive also compensates for small unevenness in the workpiece. These and various other properties make it an unbeatable assistant for all kinds of bonding work.<\/p>\n

Not to be underestimated, however, is its health hazard. It is, therefore, subject to the Chemicals Prohibition Ordinance and may not be sold to persons under 18 years of age. Furthermore, specific safety measures must be taken when using it, which we will discuss below.<\/p>\n

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Different Types of Polyurethane Glues<\/h2>\n

Polyurethane glues are available in different versions. Besides the one-component adhesives, there are two-component adhesives.<\/strong> However, both are based on the same principle, the chemical reaction of different ingredients. Furthermore, hot melt adhesives are available, also called hotmelts. All types have their advantages and disadvantages. Hotmelts are particularly robust, but offer the user only a very limited open time during which the adhesive can be processed.<\/p>\n

In the following sections, we list all polyurethane adhesive properties of the different types of adhesive.<\/p>\n

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Polyurethane Two-Component Adhesives<\/h2>\n

PU 2K adhesives are those that bond surfaces together by the chemical reaction of two components, usually a resin and a hardener. Both elements must be mixed in a specific ratio. There are different mixing ratios. The most common mixing ratios of adhesive to hardener are either 100:15 or 100:30. A good alternative is epoxy resin glue<\/a><\/strong>.<\/p>\n

Polyurethane two-component adhesives are divided into different degrees of hardness. A distinction is made:<\/p>\n

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