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View challenge: C-7140-0103 - Seeking alternatives to sulphur for use as a polymer cross linking agent in asphalt.
Our Client is seeking alternatives to sulfur for use as a polymer crosslinking agent in asphalt

Our criteria

Does not contain sulfur
Can be used to prepare PMA
Work for butadiene double bond at high temperature (up to 180C)
Cost efficient
Safe to use

Background

Elemental sulfur is a widely used additive for polymer-modified asphalts. Sulfur vulcanization, a chemical process widely used in the rubber industry, was found to be able to improve the storage stability of some polymer modified asphalts (PMA) with unsaturated polymer modifiers such as styrene-butadiene-styrene (SBS) polymers. Sulfur works in two ways: chemically crosslinking the polymer molecules via double bond of butadiene and chemically coupling polymer and bitumen through sulfide and/or polysulfide bonds. The crosslinking of polymer molecules leads to the formation of a stable polymer network in the bitumen; while the coupling between polymer and bitumen directly reduces the possibility of separation. Despite the improvements of the properties of PMA, the application of elemental sulfur presents a danger to human health and environment due to the generation of a hazardous gas, hydrogen sulfide. This gas is generated in large quantity during preparation of PMA, especially at high temperature. The purpose of this search is to find out if other cross linkers besides elemental sulfur can be used to prepare PMA. In particular, we are interested in cross linkers which would work for butadiene double bond at high temperature (up to 180C). Thermally activated cross linkers are preferred.

Our client's research and development laboratories in North America, South America, Europe, Asia and Australia are staffed with industry experts and state of the art analytical and application equipment. Utilizing R&D best practices we have developed many patented technologies, proprietary products/processes and new applications. We are dedicated to a culture of learning and keep abreast of market and research trends via customer partnerships, academic collaboration and industry trade association participation.

The proposal would need to clearly describe the technical concept (chemical approach, structure if IP protected) and proof of concept results, if available
Importance
Key Expectation from the solution
Must Meet
 Does not contain sulfur
Must Meet
 Can be used to prepare PMA
Must Meet
 
Good if Met
 
Good if Met
 
Good if Met
 
Challenge Start date: 26-Apr-17         
End date: 11-May-18
 Scheduled
 Completed
 In progress
 Need attention
Funded research, Exclusive IP licensing, Joint development
 

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