1, bisphenol A
Bisphenol A oil called BPA, bisphenol A is used in industry to synthesize polycarbonate (PC) and epoxy resins and other materials. 60 years since the 1960s has been used in the manufacture of plastic (milk) bottles, sippy cups for young children, and the inner coating of food and beverage (powdered milk) cans. BPA is ubiquitous, from bottles of mineral water, medical equipment and food packaging, and the inside, all of which are it. BPA is everywhere, from mineral water bottles and medical devices to the inside of food packaging.
The world produces 27 million tons of BPA-containing plastics every year. But BPA can also cause endocrine disruption, threatening the health of fetuses and children. Cancer and obesity due to metabolic disorders are also thought to be linked. The European Union, which believes that BPA-containing bottles can induce precocious puberty, has banned the production of baby bottles containing the chemical bisphenol A (BPA) since March 2, 2011, the EU said.
2. Toxicity
Information shows that BPA is a low-toxicity chemical. Animal testing has found that BPA has an estrogen-mimicking effect, and that even very low doses can produce premature estrogen, decreased sperm count, and prostate growth in animals. In addition, some data show that BPA has a certain degree of embryotoxicity and teratogenicity, can significantly increase the occurrence of ovarian cancer, prostate cancer, leukemia and other cancers in animals.
At the same time, studies have shown that BPA is associated with asthma in mice, and preliminary human experiments have shown that pregnant women affected by BPA in early pregnancy may cause their babies to contract asthma.
Extended information:
Domestic uses of BPA:
Bisphenol A is mainly Used in the production of epoxy resins and polycarbonates, it is currently one of the fastest growing chemical products in China in terms of demand, and its main use in China is the preparation of epoxy resins. Historically, Chinese epoxy resin manufacturers produced their own bisphenol A, and no bisphenol A commodities were available on the market at that time.
After the reform and opening up, the users had high requirements on the quality and variety of epoxy resin, and Wuxi Resin Factory and Shanghai Resin Factory had started the research on the production process of bisphenol A at that time.
In order to remove the long-used sulfuric acid method of production of bisphenol A process, since the early 1980s China's Wuxi Resin Factory, Shanghai Dyeing and Chemical Plant No. 2, Dalian Paint Factory almost simultaneously carried out the ionic method of bisphenol A test work, but also want to learn from the advanced experience of foreign countries, the plan is to introduce the advanced technology of bisphenol A to the development of China's bisphenol A. However, the two paths forward have encountered difficulties.
According to the China Epoxy Resin Industry Association experts Cha Wenhai: the former into the 500 tons / year of industrial testing, encountered post-processing equipment, technology can not pass the problem; the latter can not overcome the Western countries to limit the import of strategic technology to China's key defense line.
In such a situation, Wuxi Resin Factory in the late 1980s from Poland introduced a more advanced ionic production of bisphenol A process, narrowing the gap with the world's advanced level, and solved the epoxy resin development of raw materials encountered difficulties, so that the domestic epoxy resin in the fierce competition in the market to win a place.
Baidu Encyclopedia - Bisphenol A