Modified sulfur and production method thereof

A method of providing a modified sulfur useful in concrete, asphalt concrete, coatings or sealants, comprising:

• mixing sulfur and a modifier consisting essentially of an unsaturated fatty acid-based modifier,
• introducing the resulting mixture into a reactor and melting the mixture by heating to at least about 120° C. so that the sulfur of the mixture melts to a liquid state,
• polymerizing the resulting liquid sulfur/modifier mixture by raising temperature of the mixture over a period of time, gradually such that exothermic reaction with rapidly rising temperature and carbonization does not occur, to a temperature exceeding 160° C., while stirring the mixture, and
• terminating the reaction at a time when the resulting modified sulfur at room temperature exhibits spinnability or has a network or honeycomb structure,
• the duration of the method being six to 18 hours.