* S&P500 E-mini futures down 0.2 pct
* MSCI ex-Japan Asia-Pacific down 0.3 pct, but Nikkei up sharply
* Trump imposes 10 pct tariffs on $200 bln goods from China
* U.S. 10-year bond yields retreat from 4-month highs
By Hideyuki Sano and Swati Pandey
TOKYO/SYDNEY, Sept 18 (Reuters) - Asian shares fell and copper prices eased on Tuesday after Washington announced new tariffs on Chinese imports, inflaming trade tensions between the world's two biggest economies.
U.S. stock futures took a knock as well, with E-Minis for the S&P 500 ESc1 and the Dow Minis 1YMc1 both down 0.2 percent.
MSCI's broadest index of Asia-Pacific shares outside Japan .MIAPJ0000PUS slipped 0.3 percent with Hong Kong's Hang Seng index .HSI off 0.7 percent and Australian stocks .AXJO down 0.4 percent.
Chinese shares were a touch lower with the blue-chip index .CSI300 off 0.1 percent while Japan's Nikkei .N225 bucked the trend, gaining more than 1.5 percent.
The sell-off came after U.S. President Donald Trump imposed 10 percent tariffs on as additional $200 billion worth of Chinese imports, and warned of duties on more products if China took retaliatory action. spared smart watches from Apple AAPL.O and Fitbit FIT.N and other consumer products such as bicycle helmets and car seats for babies.
"The announcement dashes hopes of any trade negotiations between two rivals. Be prepared for a prolonged period of risk-off," analysts at ING said in a note.
"Although the levy saw a lower rate, it could foment a response from China which had previously threatened to walk away from the negotiating table," ING said.
Some analysts said the market reaction was a bit muted because Tuesday's announcement was in line with expectations and had been baked into prices.
Chinese Vice Premier Liu He was to convene a meeting in Beijing on Tuesday to discuss the government's response, Bloomberg News reported, citing a person briefed on the matter. South China Morning Post newspaper reported, citing an unidentified source in Beijing, that China was reviewing its previous plan to send a delegation headed by Liu He to the United States next week for fresh talks, and was now unlikely to do so.
In currencies, the dollar index gained briefly against a basket of major currencies but was last unchanged at 94.465. .DXY
Against the yen JPY= , the greenback inched up 0.1 percent to 111.94.
The risk-sensitive Australian dollar AUD=D3 shed as much as 0.5 percent on the tariff news to near a recent 2-1/2 year low, then it changed direction and was up 0.2 percent at $0.7193. AUD/
The euro EUR= gained a fraction to $1.1693.
The latest tariff news sent some investors to the safety of U.S. Treasuries with 10-year US10YT=RR yields coming off Monday's four-month top of 3.0220 percent as bond prices rose. They were last at 2.9922 percent.
Oil prices fell on worries rising trade tensions could dent global demand for crude.
U.S. crude futures CLc1 skidded 28 cents to $68.63 a barrel while international benchmark Brent futures LCOc1 lost 43 cents to $77.62 per barrel.
Copper, considered a barometer of global growth, drifted lower for a third straight session. CMCU3