Polyisobutene and polyisobutene derivatives for use in...

Details Polyisobutene and polyisobutene derivatives for use in... Polyisobutene and polyisobutene derivatives for use in...

2006-07-04

2006-07-04

Choi, Ling-Sui (Department: 1713)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S217000, C526S317100, C526S272000, C526S348000, C525S386000

Reexamination Certificate

active

07071275

ABSTRACT:
The invention describes polyisobutenyl derivatives of succinic acid obtainable by: i) reacting a polyisobutene which has a reactive end group content of at least 80% and whose molecular weight distribution is characterized by a maximum MPin the distribution curve in the range from 500 to 20 000 daltons and a ratio of weight average molecular weight to number average molecular weight MW/MNof below 1.4 with maleic acid or maleic anhydride; ii) reacting the polyisobutene-succinic acid derivative obtained in i) with at least one compound I which has at least one primary or secondary amino group and/or an OH group to form an amide or ester bond, and also a process for preparing them and their use as additives in lubricant compositions.

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