Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1976-02-06
1977-12-13
Clingman, A. Lionel
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
260 285R, 526233, 526237, 526347, C08F21000, C08F21200
Patent
active
040630110
ABSTRACT:
The specification discloses resinous compositions comprising copolymers of alpha methyl styrene and vinyl toluene, 95 percent by weight of said copolymers having molecular chain lengths less than 100 Angstroms. The compositions are characterized by softening points in the range of about 10 to 98.degree. C. and good solubility in paraffin wax. Processes are disclosed for preparing said compositions by copolymerizing mixtures of monomers of vinyl toluene and alpha methyl styrene in a weight ratio in the range of 2.5:1 to 4.5:1 in the presence of an acid clay catalyst.
REFERENCES:
patent: 3000868 (1961-09-01), Powers
patent: 3427275 (1969-02-01), Davis et al.
patent: 3640981 (1972-02-01), Davis
patent: 3956250 (1976-05-01), Campbell et al.
Campbell Clarence Clayton
Finfinger Dean Almon
Board Charles L.
Clingman A. Lionel
Hercules Incorporated
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