The phrase "aims to block" is correct and usable in written English.
It can be used when describing an intention or goal to prevent something from happening or to obstruct a particular action.
Example: "The new policy aims to block any unauthorized access to sensitive information."
Alternatives: "intends to prevent" or "seeks to obstruct".
The drug aims to block the binding of vasopressin to V1AR.
But legislation around the country and world aims to block newcomers from being able to use some of those words to describe their products.
Ian Fisher (NYT) MIDDLE EAST IRAN: BILL ON NEWSPAPERS -- After an order from Iran's supreme leader to drop a debate on press freedom, reformist lawmakers presented a bill that aims to block the hard-line judiciary from closing reformist newspapers.
This was provoked, it says, by South Korea's decision to join the American-led Proliferation Security Initiative, a group that aims to block shipments of weapons of mass destruction and related contraband.
The group aims to block federal regulations so it can spend unlimited money on a commercial smearing the Democratic nominee as a zealous proponent of any and all abortion on demand — "at any time during pregnancy, as many times as a woman wants one".
[World Business, Section W.] Cancer Drug Fails Late-Stage Trial Genentech said that a drug that aims to block the flow of blood to tumors has failed its first late-stage clinical trial -- a blow to the company and to what has been considered a promising approach to treating cancer.
Both drugs aim to block a cancer-spurring protein called epidermal growth factor receptor.
They also aim to block names that might cause offence to others (Jesuswept).
America could aim to block China now before it gets any stronger.
They aim to block his moves and contain him while waiting for a chance to strike themselves.
According to Forbes, the scope of Australia's internet censorship has developed far beyond its initial aim to block child pornography and web pages associated with terrorism.
