Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1986-09-02
1989-01-10
Henderson, Christopher
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526209, 526210, 526211, 526213, 526214, 526224, C08F 220, C08F 238
Patent
active
047974583
ABSTRACT:
Polymers of vinyl halides having low molecular weights, good particle characteristics, and improved melt flow are made by aqueous polymerization utilizing an effective amount of a mercaptan as a chain transfer agent, wherein the mercaptan chain transfer agent is mixed with at least one material which is non-polymerizable with vinyl chloride and wherein said non-polymerizable material is substantially insoluble in water and is miscible with said mercaptan to form a chain transfer composition, and said chain transfer composition is added before the start of the polymerization while maintaining colloidal stability.
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Henderson Christopher
Powell Joe A.
The B.F. Goodrich Company
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