These chemicals-widely used in the middle decades of the 20th century to manufacture electrical insulation coolants sealants and plasticisers-often ended up dumped in lakes rivers and coastal waters .
These chemicals-widely used in the middle decades of the 20th century to manufacture electrical insulation , coolants , sealants and plasticisers-often ended up dumped in lakes , rivers and coastal waters .
The compound , used inmanufacturing polycarbonate plastic and epoxy resins , is found inplastic goggles , face shields , and helmets ; baby bottles ; protectivecoatings inside metal food containers ; and composites and sealants usedin dentistry .
Abstract : the characteristics , features , classification , gradation and technical requirements of building sealants are described . The function for sealing building joints is briefly analyzed , and new standards are also introduced .