In recent years, with the increasing awareness of global environmental protection, halogen-free flame retardant materials have been paid more and more attention, especially high-performance halogen-free flame retardant nylon materials are being welcomed.

However, the unmodified nylon has poor flame retardancy and belongs to flammable materials, and droplets occur in the combustion process, which is easy to cause fire in the use process. Therefore, the flame retardant modification of nylon has become a common concern and key issue in academia and industry today. Later, scientists added flame retardants to nylon, which changed its flame retardancy, and the use of nylon became more extensive.

For halogen-free flame retardant nylon, the word “halogen-free” is used to mark the types of flame retardants used. Flame retardants are divided into halogen-containing flame retardants and halogen-free flame retardants. Halogen-containing flame retardants, such as bromine flame retardants, are mostly used in the early modification industry. However, since the dioxin problem appeared in 1986, brominated flame retardants began to face tremendous environmental pressures, and the controversy about brominated flame retardants has not stopped in the world.

Halogen-free flame retardants solve this problem. The halogen-free flame retardants widely used in nylon are red phosphorus and melamine salts. Red phosphorus has high flame retardant efficiency and can improve the arc resistance of products, but its storage and color limitations greatly limit its application in nylon, generally only in nylon 6. Another halogen-free flame retardant used in nylon is melamine salt, mainly melamine urate and phosphate. They have good flame retardant efficiency, but their thermal stability is poor, and their electrical properties are poor in humid environment because of their moisture absorption.

Halogen-free flame retardant nylon is added in the flame retardant content is very low or does not contain halogen group elements of bromine and chlorine. Halogen-free flame retardant nylon products have excellent flame retardant performance, flame retardant level up to UL94V0, with low precipitation, anti-dripping, high electrical performance and heat resistance, high CTI value, good electrical performance, high impact strength, environmental friendliness and environmental protection. Suitable for electrical connectors. The flame retardancy of the composites was improved by adding bromine flame retardants or halogen-free flame retardants which met the European ROHS standard. This granular nylon can withstand a processing temperature of 260 C.

In the process of using halogen-free flame retardant nylon granular materials, we sometimes encounter some labels, such as UL94V-0, UL94V-2 and so on.

Flammability UL94 is the most widely used standard for flammability of plastic materials. UL94V0 level can meet five standards and requirements: first, no sample still burns for more than 10 seconds after the test flame is removed; second, for each set of five samples, the total time of burning with the flame after 10 ignitions does not exceed 50 seconds; third, no sample burns to the fixture; fourth, no sample burns to the fixture; fourth, no sample burns melted liquid droplets ignite the following 12 “places”. Cotton; Fifth, without any sample, it continued to glow red for more than 30 seconds after the second removal of the test flame. Such a standard can completely avoid the occurrence of fire.

With the wider application of nylon engineering plastics, more and more varieties of flame retardants and the development and research of flame retardant technology, flame retardant nylon will develop in the following four directions in the coming decades:

One is the technology of compounding flame retardants. Many flame retardant manufacturers in the world are engaged in the development of new synergistic system, that is, the compounding of various flame retardants, in order to reduce the amount of flame retardant and improve the flame retardant performance, which not only reduces the price of flame retardant materials, but also reduces the loss of physical properties.

The second is non-halogenation, low toxicity and low halogenation. Many countries have banned or restricted the use of halogen-containing flame retardants, replaced by phosphorus, nitrogen-based flame retardants and inorganic flame retardants.

Third, multi-function. In some industries, nylon is required not only to have flame retardant properties, but also to have such properties as thermal conductivity, conductivity, antistatic and so on. A large number of other additives are needed to meet the user’s requirements.

Fourth, the balance of cost and performance. Developing efficient flame retardant system can reduce the influence of flame retardant on the physical properties of materials, and reduce pollution and cost.

On May 28, the ammonium nitrate commodity index was 103.51, which was the same as yesterday. It was 12.59% lower than the cycle peak of 118.42 points (2019-01-15), and 33.79% higher than the lowest point of 77.37 on October 31, 2016. (Note: Period refers to 2013-02-01 to date).

Recently, the price trend of domestic ammonium nitrate Market is temporarily stable. Affected by environmental protection control, domestic ammonium nitrate plant shuts down more, domestic ammonium nitrate plant starts less, but with the warming of the weather recently, the influence of northern air limitation disappears. In addition, due to the complete shutdown of domestic downstream civil explosion industry, domestic ammonium nitrate manufacturers have more stockpiles, and the price trend in the field declines. As of the 29th, domestic ammonium nitrate market price negotiations in 1900-2050 yuan/ton, affected by environmental protection, so now many manufacturers in many areas are forced to limit production or stop production and maintenance for environmental protection inspection, the price trend of ammonium nitrate on the site is temporarily stable.

Recently, the domestic nitric acid price has risen, up to 29 days, the market price is 1726.67 yuan/ton. The rising trend of nitric acid price has a positive impact on the ammonium nitrate market, and the price trend of ammonium nitrate is stable. The price trend of upstream raw material liquid ammonia has risen slightly. As of 29 days, the price quoted by manufacturers in the northern region is maintained in the range of 3200-3600 yuan/ton, while that in the northwest region is around 2900-3100 yuan/ton. The upward trend of raw material prices in the upstream has a positive impact on the ammonium nitrate market, and the price trend of ammonium nitrate Market is temporarily stable. At the end of the peak season of the downstream civil explosion industry recently, the demand for ammonium nitrate has weakened and the stocks of ammonium nitrate manufacturers have increased, but the liquid ammonia market is on the rise again. The ammonium nitrate Market is shaking at a low level because of the bad market. Ammonium nitrate analysts believe that the recent upstream raw material market price shocks, but the downstream demand is not good, ammonium nitrate market prices are expected to remain low in the latter part of the shocks.

In May, the prices of polyethylene in various sales links continued to fall, prices continued to fall, linear and low-pressure injection moulding appeared “7″ low price. Low prices stimulated some middlemen and downstream replenishment, the market rebounded rapidly on the 17th, turnover improved, and petrochemical stocks quickly digested. However, after replenishing the warehouse, the 22nd returned to silence, and high-end prices began to fall. Polyethylene may start a new round of decline on the 24th due to crude oil plunge and the downward trend of linear futures.

First of all, domestic maintenance devices will start one after another. Lanzhou Petrochemical PE plant is scheduled to restart on June 20; Yuneng Chemical Full Density Plant is scheduled to stop on May 8 and start at the end of May; Jilin Petrochemical Linear Plant is scheduled to stop on May 14 and restart on May 28; Maoming Petrochemical Full Density Plant is scheduled to stop on May 11 and start-up time is pending; Pucheng Clean Energy Full Density Plant is scheduled to stop on May 17 and restart around June 11. There are few new overhaul devices. There is no new overhaul device except the 450,000 tons low-voltage unit planned for July in Yan’an Energy and Chemical Industry, Shaanxi Province. Following the start-up of Jiutai energy plant, the first 350,000 tons linear plant of Zhongan Coal Chemical Company is scheduled to start in June 2019.

Secondly, demand continues to be off-season, the demand for plastic film ends, enterprises shut down mainly, individual enterprises maintain sporadic production or stage start-up, mainly functional plastic film. The demand for plastic film is light, the order follow-up is insufficient, and most enterprises have stopped or staged production. Some high-end film follow-up, mainly EVA sunlight film and PO film, some large and medium-sized enterprises maintain a small or stage production, the start-up rate generally varies from 1 to 3%. In June, all products were still in the off-season of demand, and the domestic wheat harvest season came one after another.

Thirdly, the macro-level is negative. Internationally, the conflict of trade wars persists. The market is worried about the negative impact of trade wars on economic growth and the growth rate of global demand. From the perspective of crude oil supply and demand pattern, Iran, Venezuela and OPEC cut-off agreements affect the supply of crude oil, while OECD lowered the growth expectation of crude oil demand, there are uncertainties in the supply and demand side of crude oil, and crude oil maintains a short-term oscillation pattern.

Domestic side: Facing the escalation of trade war, the domestic government has raised counter-cyclical adjustment to cushion the downward pressure of the economy; domestic monetary policy and fiscal policy actively release positive news, increase support for infrastructure and consumer side, which is conducive to smoothing the change of demand side.

Overall, although the market is concerned about the global economic downturn and obvious changes in demand side, a series of domestic policies have been issued to hedge the impact of peripheral markets. Overall, there are certain uncertainties in macro-level, and the emotional impact on commodities is slightly neutral.

I. Trend analysis

According to the data of business associations, the price of domestic cis-butadiene rubber rose slightly this week (5.20-5.24). At the beginning of the week, the price was 11312 yuan/ton, and at the end of the week, the price was 11362 yuan/ton, up 0.44%.

II. Market Analysis

Petrochemical ex-factory price: This week (5.20-5.24) domestic cis-butadiene rubber petrochemical factory ex-factory price increased by 300 yuan/ton, as of May 24, Daqing Petrochemical cis-butadiene rubber ex-factory price increased by 11500 yuan/ton.

Rubber import and export: China imported 557,000 tons of natural and synthetic rubber (including latex) in April 2019, a decrease of 4.13%. From January to April 2019, China imported 212.8 million tons of natural and synthetic rubber (including latex), an increase of 2.3% over the same period last year.

Raw materials: raw material butadiene prices rose slightly this week, the cost side supports the price of cis-butadiene rubber. According to the business association, butadiene was 8081 yuan/ton at the beginning of the week and 8370 yuan/ton at the end of the week, up 3.58 percent on the whole.

Demand: According to the statistics bureau, the output of domestic rubber tyres in April 2019 was 73.758 million, down 0.8% from the same period last year; the output of domestic rubber tyres in January-April was 26.633 million, down 3.6% from the same period last year.

3. Prospects for the Future Market

Xu Xiaokun, an analyst with business associations, believes that at present, on the one hand, the price of upstream butadiene has risen slightly, which supports the price of synthetic rubber, on the other hand, the downstream market of rubber is weak, and the overall negative atmosphere for cis-butadiene rubber is formed. In the later period, the market of cis-butadiene rubber will maintain a narrow fluctuation.

First, the price trend

The price of Trichloromethane in China continued to rise this week, with 2780 yuan/ton at the start of the week in Shandong, and an average price of 2930 yuan/ton over the weekend, up 5.4%, according to business’s bulk data monitoring.

Ii. Analysis of Causes Product Reason: This week, the domestic trichloromethane market is affected by the strong demand for downstream refrigerant, the price continues to rise, the current Shandong region Chloromethane quote 2930-2960 yuan/ton or so, Jiangsu region quoted 4000 yuan/ton or so: Jiangxi quote 3700 yuan/ton or so.

In terms of construction, jinling chemical plant to resume production, the current construction of about 80%, dongying jinmao full load operation, Luxi chemical plant started 60%, Jiangsu Liwen Plant started normal, Jiangxi Liwen plant normal operation and so on. Industrial chain: Upstream, this week the domestic methanol market performance is strong, local prices continue to move up. At the beginning of the week, the average price of domestic methanol market in 2288 yuan/ton, the weekend reported 2342 yuan/ton, the increase of 2.36% in the week, the price is 23.18% lower than the same period last year, the liquid chlorine market supply and demand two weak, the overall performance is stable, enterprises more than 300-600 yuan/ton.

Downstream, R22 refrigerant market in the high season, the overall performance is better, the market trading active, is the Enterprise Scatterwater Factory reported 18500-18800 yuan/ton. Industry: According to business price monitoring, in the 20th Week of 2019 (5.20-5.24) commodity prices rose and fell in the chemical sector a total of 17 kinds of goods, including more than 5% of the total number of goods 1, accounting for the sector of 1.4% of monitored goods; the top 3 of the goods were Trichloromethane (5.4%) , Butadiene (3.57%), fluorite (3.28%).

A total of 28 items fell in the ring, a total of 6 products fell above 5%, accounting for 8.2% of the number of goods monitored in the sector, and the first 3 of the decreases were TDI (-15.15%), sulfuric acid (-8.79%) and polymerized MDI (-7.2%).

Third, the forecast of the aftermarket Business Society Methane chloride Data analyst believes that the current Trichloromethane market supply gap has gradually eased, the industry supply and demand two strong, trading atmosphere is good, it is expected that in the future a short period of time methane chloride market high strength.