Peroxide treated substantially amorphous polyolefins useful as p

Details Peroxide treated substantially amorphous polyolefins useful as p Peroxide treated substantially amorphous polyolefins useful as p

1977-07-06

1978-09-05

Hamrock, William F.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Effecting a change in a polymerization process in response...

526 19, 526 22, 526348, 5263481, 5263486, 526351, C08F 806

Patent

active

041122089

ABSTRACT:
The invention relates to a process for the treatment of substantially amorphous polyolefins with peroxides at high temperatures to provide permanently tacky, low viscosity materials which have useful pressure-sensitive adhesive properties. These permanently tacky amorphous polyolefin homo- and copolymers, as well as blends of such amorphous polyolefins with crystalline polyolefins containing up to 20 weight percent crystalline polyolefin, are novel pressure-sensitive adhesives. These permanently tacky polymers are obtained, for example, by treating substantially amorphous polyolefins, such as amorphous polypropylene or amorphous propylene/1-butene copolymers, with peroxides at high temperatures.

REFERENCES:
patent: 3012020 (1961-12-01), Kirk et al.
patent: 3449191 (1969-06-01), Taylor

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