Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1977-08-22
1979-09-11
Henderson, C. A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
260665R, 526328, 526329, 526344, 526346, 528 4, C08F 444, C08F 206
Patent
active
041676165
ABSTRACT:
Polymerizable monomers are polymerized in a reaction mixture containing as catalysts (A) an oxygen source and (B) an organic boron compound which is soluble in the reaction mixture, the boron compound being (1) a diborane adduct wherein the boron atoms are linked by a hydrocarbyl group having an aliphatic carbon atom bonded to at least one of the boron atoms, or (2) oligomers based on repeating units containing at least two boron atoms linked by hydrocarbyl groups having an aliphatic carbon atom bonded to at least one of the boron atoms. The diborane adducts include the adduct of borane or a dialkylborane and 1,3-butadiene. The oligomers include polymers of diborane/propadiene adducts. The organoboron catalysts provide rapid initiation of polymerization and the polymerization is relatively insensitive to oxygen concentration, thereby permitting polymerization at ambient temperatures.
REFERENCES:
patent: 3061603 (1962-10-01), Calfee
Encyclopedia of Chem. Tech., Interscience Publ., (N.Y.), 1964, pp. 714, 715.
Baker Patrick C.
Henderson C. A.
Rohm and Haas Company
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