Location History:
- Hitchin, EN (1976)
- Hitchin, GB (1979)
Company Filing History:
Years Active: 1976-1979
Title: Innovations of George David Appleyard
Introduction
George David Appleyard is a notable inventor based in Hitchin, GB. He has made significant contributions to the field of polymer chemistry, particularly in the development of catalysts for olefine polymerization. With a total of 2 patents, his work has had a considerable impact on the industry.
Latest Patents
One of his latest patents is focused on an olefine polymerization process and catalyst. This innovative catalyst comprises a titanium trichloride component of high surface area, an organo-metallic component, a Lewis Base component, and optionally a polyene. The titanium trichloride component, which may have high porosity, is conveniently obtained by the reaction of titanium tetrachloride and an organo-aluminium compound. This reaction product is treated with a complexing agent and then contacted with titanium tetrachloride. The organo-metallic component is preferably aluminium triethyl, while the Lewis Base component is hexamethylphosphoric triamide, and the polyene is cycloheptatriene. This system exhibits high polymerization activity combined with good stereospecificity, allowing polypropylene to be obtained in high yield, resulting in low catalyst residues and a polymer with a high stiffness modulus. Another patent involves a polymerization catalyst that comprises a solid transition metal compound ground with a Lewis Base, an organo-metallic compound of a non-transition metal, and a cyclic polyene. This catalyst can be used to polymerize propylene, yielding a polymer with a flexural modulus exceeding 1.00 GN/m².
Career Highlights
George David Appleyard is associated with Imperial Chemical Industries Limited, where he has contributed to various innovative projects. His expertise in polymer chemistry has positioned him as a key figure in the development of advanced polymerization techniques.
Collaborations
Some of his notable coworkers include Anthony D Caunt and Michael Stanley Fortuin. Their collaborative efforts have further enhanced the research and development initiatives within their field.
Conclusion
George David Appleyard's contributions to polymer chemistry through his innovative patents and collaborations have significantly advanced the industry. His work continues to influence the development of efficient polymerization processes and catalysts.