Additions

Question 1

Polyurethane

Answer 1

This forms a basis of many points and varnishes because it is very tough and has water resistant qualities

Question 2

Melamine formaldehyde

Answer 2

Used in production of plastics laminates excuse of its smooth surface and hygienic qualities. Also used in electrical plugs and sockets because it can be cast and it’s an excellent insulator.

Question 3

Polyester resins

Answer 3

If resins are combined with a material such as fibre the result is a very tough material that can resist impact. This material is known as glass reinforced plastics (GRP) used in car body repairs, sailboats, carrugated sheets because of its lightness, toughness and resistance to water.

Question 4

Adhesives (glue)

Answer 4

A good example is ‘Araldite’,hardens when a second chemical is added (a catalyst).it will band most materials such as woods, metals and some plastics.