It has been suggested that Polybutene-1 be merged into this article or section. (Discuss)

Polybutylene is a thermoplastic Polyolefin. It is created by polymerizing butylene. It is a semi-crystalline thermoplastic, and is also known as polybutene-1. It should not be confused with polybutene, a low molecular weight oligomer with a different repeat unit.

Contents 1 Controversy 2 See also 3 References 4 External links

[edit] Controversy

The suitability of polybutylene for use in plumbing is controversial. Polybutylene plumbing was used in 6 to 10 million homes built in the United States from 1970 to the mid-1990s. ^[1] Problems with leaks led to a class action lawsuit, Cox vs. Shell Oil, that was settled for one billion dollars ^[2]. Polybutylene plumbing is still widely used in Europe and Asia ^{[3] [4] [5]}

The material oxidised when used in hot water systems, developing longitudinal cracks which eventually punctured the walls leading to floods and damage to properties. Many acetal resin fittings also cracked, a problem caused by chlorine attack. Even the low concentration (ppm) of chlorine used in most potable water supplies for purification was enough to initiate cracking. ^[6]

[edit] See also

• Forensic engineering
• Forensic polymer engineering
• Polymer degradation

[edit] References

1. ^ The Problems with Polybutylene
2. ^ Consumer Plumbing Recovery Center
3. ^ Polybutylene Piping Systems - Successful in the Past, Prepared for the Future
4. ^ Myths About Polybutylene
5. ^ Polybutylene Public Service Message
6. ^ Leaks Plague Polybutylene Plumbing

[edit] External links

• Structure and properties

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