The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 29, 2002
Filed:
Dec. 21, 2000
Applicant:
Inventors:
Raj B. Durairaj, Monroeville, PA (US);
Alex Peterson, Jr., Pittsburgh, PA (US);
Assignee:
Indspec Chemical Corporation, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08K 3/18 ; C08K 3/22 ;
U.S. Cl.
CPC ...
C08K 3/18 ; C08K 3/22 ;
Abstract
Methods for preparing formaldehyde-free resorcinol resins are disclosed. The methods generally comprise reacting resorcinol first with dicyclopentadiene and then reacting that mixture with an olefinic compound. The resins produced by this method are also disclosed, as are rubber compositions utilizing the present resins. The resins are characterized as having a free resorcinol content of about 1 wt. % or less, and yielding a suitable softening point when used in rubber applications.