Production of Modified Sulfur Binder and Uses Thereof
AssigneeUberbinder, Inc.
InventorsJett Yang, Jonathan Davis, Phil Ho Ahn
Life of this patent
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Abstract
A modified sulfur is produced using an environmentally-friendly material, exhibiting high functionality to solve problems of conventional modified sulfur, such as environmentally hazardous factors and odors. The invention also encompasses methods for producing concretes, coatings, waterproofings and other products using the modified sulfur as a binder, as well as the products thus made. In one aspect the modified sulfur includes sulfur and a modifier, wherein the modifier is a monounsaturated fatty acid-based modifier. Critical steps in producing the modified sulfur are disclosed, and in one embodiment the method is conducted in a multi-cell continuous flow reactor.
Claims15
A method of providing a modified sulfur useful in concrete, asphalt concrete, coatings, sealants, waterproofing and roofing, in a continuous flow reaction, comprising:
- continuously feeding molten sulfur and an unsaturated fatty acid modifier into a multi-cell continuous flow reactor,
- heating the resulting mixture in the reactor to about 160° C. to 180° C. to polymerize the mixture, while controlling temperature in the cells of the multi-cell flow reactor to avoid runaway exothermic reaction with rapidly rising temperature and carbonization, and while causing thorough mixing of the mixture as it progresses through channels and cells of the multi-cell flow reactor, and
- terminating the reaction at a time when the resulting modified sulfur at room temperature exhibits spinnability or has a network or honeycomb structure, including cooling the resulting modified sulfur at termination of the reaction.
A method of providing a modified sulfur useful in concrete, asphalt concrete, coatings, sealants, waterproofing and roofing, comprising:
- mixing sulfur and an unsaturated fatty acid 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 of about 160° C. to 180° C. causing which ring opening polymerization to occur, while stirring the mixture, and
- terminating the reaction by quenching at a time when the resulting modified sulfur at room temperature exhibits spinnability or has a network or honeycomb structure,
- the method being completed in two hours or less.
Dependencies are inferred from the claim text.