Biobased adhesives and sealants in continuous development
The environmental concerns, growth of population and decreasing of fossil resources all affect the development of biobased adhesives and sealants. The adhesive and sealant formulations traditionally rely on fossil fuel based components, however, the newer technologies allow for formulations where the fossil materials are replaced by biobased, renewable materials.
Not only are biobased adhesives and sealants environmentally friendly, but they also posses desired mechanical and chemical properties which contribute to their efficiency. Materials used in biobased products include starch, vegetable oils, proteins, lignin and natural resins.
Biobased materials in adhesives and sealants
The raw materials used in biobased adhesives and sealants are derived from biomass mostly produced by the agricultural and silvicultural processes. These materials are climate-neutral without affecting the environment when used in adhesives, sealants and other chemical products. The biobased materials replacing petroleum based polymers, tackifiers and waxes are presented in the table below.
|Biobased material type||Ingredients in biobased adhesives and sealants|
|Tackifiers|| Pine rosin|
Dimerized fatty acids
Some biobased materials are also biodegradable. Especially adhesives use these materials, and when they make up the most of the ingredients, the adhesives become compostable by industrial means.
European Standard EN 16785-1 measured biobased content
When biobased adhesives and sealants first were introduced, there were neither internationally acknowledged standards nor testing for biobased materials. To make it easier to define biobased materials and products that use them, several standards have been developed, one of them being the European Standard EN 1678-1 which verifies biobased content of products. Determining biobased content is done by radiocarbon analysis and elemental analysis according to CEN/TS 16440 for Carbon- 14 component.
In the standard EN 19785, biobased is defined as “derived from biomass”. The biobased products are thus those partially or wholly made of materials derived from biomass. The standard covers a broad range of products as it is applicable to solid, liquid and gaseous compositions which contain carbon.
What is in it for the adhesives and sealants manufacturers and buyers?
Obtaining a biobased certificate helps manufacturers demonstrate the biobased content of their products on the labels. This increases the trustworthiness of the products and company in general.
As for the buyer, it is good to look for products that are biobased certified according to EN 16785 or another similar standard to be sure of the contents of the product.
Interested in biobased adhesives and sealants?
Biobased adhesives and sealants are gaining more and more share on various markets ranging from wood and construction to paper and packaging. In case you would like to receive more information on biobased products, or like to enquire about a suitable biobased product for your process, do not hesitate to contact us.