Propylene polymer and copolymers grafted with vinylpolybutadiene and their preparation process
First Claim
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1. A process for preparing a propylene (co)polymer grafted with vinylpolybutadiene having at least 10% of 1,2 units, said process comprising submitting said (co)polymer to a thermal treatment at a temperature of from 200°
- C. to 350°
C. in the presence of;
(a) vinyl polybutadiene having at least 10% of units with 1,2 structure;
(b) an anti-oxidant; and
(c) a non-peroxidic free-radical initiator.
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Abstract
Crystalline propylene (co)polymers modified by grafting with a vinylpolybutadiene having 1,2-structure content of at least 10%.
Said (co)polymers are reacted with a liquid vinylpolybutadiene in the presence of a non-peroxidic radical initiator at a temperature in the range 200° to 350° C., the liquid vinylpolybutadiene having a 1.2-structure content of at least 10% and being generally used in amounts within the range 0,5 to 20% by weight.
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Citations
4 Claims
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1. A process for preparing a propylene (co)polymer grafted with vinylpolybutadiene having at least 10% of 1,2 units, said process comprising submitting said (co)polymer to a thermal treatment at a temperature of from 200°
- C. to 350°
C. in the presence of;(a) vinyl polybutadiene having at least 10% of units with 1,2 structure; (b) an anti-oxidant; and (c) a non-peroxidic free-radical initiator. - View Dependent Claims (2, 3, 4)
- C. to 350°
Specification