Use of products of the reaction of alkenyl-spiro-bislactones with amines as paraffin-dispersants

Patent 5186720 Issued on February 16, 1993. Estimated Expiration Date:

August 15, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

2321311

3048479

3248187

Middle distillate compositions with improved filterability and process therefor
Patent #: 3961916
Issued on: 06/08/1976
Inventor: Ilnyckyj , et al.

Amine derivatives of thio-bis-lactone acids in combination with coadditive hydrocarbons are flow improvers for middle distillate fuel oils
Patent #: 4251232
Issued on: 02/17/1981
Inventor: Brois , et al.

Spirolactone condensation product dispersants and lubricants containing same Patent #: 4532058
Issued on: 07/30/1985
Inventor: Chafetz

Inventors

Feustel, Michael
Ritschel, Werner (deceased): ; , ;

Application

No. 567966 filed on 08/15/1990

US Classes:

44/351, Acyclic chalcogen bonded directly to ring carbon of the hetero ring (e.g., five-membered lactones, anhydrides, sorbitans, etc.)44/340, The hetero ring contains five members including nitrogen and carbon (e.g., pyrrolidones, porphines, etc.)44/352, Ring carbons of the hetero ring are unsubstituted or hydrocarbyl substituted only44/386Compound of indeterminate structure prepared by reacting an organic -C(=O)O- compound

Examiners

Primary: McAvoy, Ellen M.

Attorney, Agent or Firm

Connolly and Hutz

Foreign Patent References

634011 CA 01/21/1962
0203812 EP. 12/21/1986
0261959 EP. 03/21/1988
0272889 EP. 06/21/1988
1263152 GB. 02/21/1972

International Classes

C10L 001/18
C10L 001/22

Foreign Application Priority Data

1989-08-16 DE

Abstract

The use of products of the reaction of alkenyl-spirobislactones of the formula ##STR1## in which R is in each case C8 -C200 -alkenyl, with amines of the formulaNR1 R2 R3in which R1, R2 and R3 may be identical or different and at least one of these groups R1, R2 or R3 is C8 -C36 -alkyl, C8 -C36 -alkenyl or cyclohexyl and the other groups are hydrogen or a group of the formula --(A--O)x H or --(CH2)n --NYZ, A is --C2 H4 -- and/or --C3 H6 --, x is a number from 1 to 20, n is 2 or 3 and Y and Z may be identical or different and are hydrogen or a group of the formula (--A--O)x H, as paraffin-dispersants in middle distillates and crude oil.