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:
Jan. 28, 1997
Filed:
Sep. 01, 1995
Roehm GmbH Chemische Fabrik, Darmstadt, DE;
Abstract
The present invention relates to comb polymers KP, produced from macromonomers of formula (I) ##STR1## where X represents a group which comes from the initiator system, preferably an alkyl group with 1-50 C atoms; R1 represents an alkyl group with 1-18 C atoms, preferably 1-10 C atoms, particularly preferably 1-4 C atoms; R2 and R3 each represent an alkyl group with 1-8 C atoms; and B represents a terminal alkene group with at least 2 and not more than 12 C atoms; wherewith the compound of formula (I) is converted, by means which are per se known, to a compound of formula (II) which contains an active hydrogen substituent in the terminal position: ##STR2## where X, R1, R2, a, b, and c are as defined above, and a represents the group B modified by introduction of the active hydrogen function; wherewith the compound of formula (II) in turn is acylated to a macromonomer of formula (IV) by a reagent MR which introduces the (meth)acryloyl group: ##STR3## where X, R1, R2, R3, A, a, b, and c are as defined above, and R4 represents hydrogen or methyl; and the macromonomers of formula (IV) thus obtained are converted to the comb polymers KP by radical polymerization with monomers M chosen from the group comprised of: (meth)acrylic acids of C.sub.1 -C.sub.28 -alkanols, functionalized radically polymerizable monomers, vinyl esters of fatty acids and vinylaromatic monomers.