Grafting of nitroxyl terminated oligomers or polymers onto...

Details Grafting of nitroxyl terminated oligomers or polymers onto... Grafting of nitroxyl terminated oligomers or polymers onto...

2003-06-12

2009-12-15

Mullis, Jeffrey C (Department: 1796)

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S203000, C525S205000, C525S221000, C525S222000, C525S230000, C525S231000

Reexamination Certificate

active

07632891

ABSTRACT:
The instant invention relates to a process for the preparation of grafted polymers wherein in a first step A) a oligomer or polymer is prepared by controlled radical polymerization in the presence of a stable free nitroxyl radical or a nitroxylether to obtain a nitroxyl terminated oligomer or polymer and in a second step B) the nitroxyl terminated oligomer or polymer is mixed and reacted with a thermoplastic or elastomeric polymer or copolymer in its molten state at a temperature at which cleavage of the nitroxyl-polymer/oligomer bond occurs, whereby the nitroxyl terminated oligomer or polymer is grafted onto the thermoplastic or elastomeric polymer. A further subject of the present invention is a grafted polymer prepared by said process.

REFERENCES:
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patent: 6335401 (2002-01-01), Bertin et al.
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patent: 2004/0077788 (2004-04-01), Saldivar Guerra et al.
patent: 4328004 (1995-02-01), None
patent: 0315280 (1985-03-01), None
Y. Miwa et al., Macromolecules, (1999), vol. 32, pp. 8234-8236.

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