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US4859758A Expired / Lapsed US ⏱️ 0.0 years remaining

Acid-functional polymers derived from cellulose ester-unsaturated alcohol copolymers, which are reacted with cyclic anhydrides

Assignee: Sherwin Williams Co
•
Filing: 1987-11-16
•
Granted: 1989-08-22
•
Expires: 2007-11-16
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Abstract

Abstract Novel carboxylic acid-functional polymers are obtained by reacting: (a) a hydroxy-functional polymer having an average of at least two hydroxyl groups per molecule; and (b) a cyclic anhydride under reaction conditions to produce acid groups and ester groups; and wherein the hydroxy-functional polymer is obtained by the copolymerization of: (i) 1-95 weight percent of a cellulose ester; and (ii) 5-99 weight percent of at least one ethylenically unsaturated alcohol copolymerizable with the cellulose acetate butyrate; and (iii) 0-94 weight percent of at least one other ethylenically unsaturated monomer copolymerizable with the cellulose ester and the ethylenically unsaturated alcohol. Curable compositions especially useful as coatings are prepared by mixing the novel carboxylic acid-functional polymers with epoxy-functional compounds and, optionally, with anhydride-functional compounds and, optionally, hydroxy-functional compounds. The coatings are especially useful in clearcoat/basecoat compositions.

Inventors

  • 👤 Mohamad D. Shalati
  • 👤 James A. Marquart
  • 👤 John R. Babjak
  • 👤 Rodney M. Harris

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-07 12:16
CPC Classifications
C; C08; C08F; C08F251/00; C08F251/02

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 111 words
A carboxylic acid-functional polymer which comprises the reaction products obtained by reacting: (a) a hydroxy-functional polymer having an average of at least two hydroxyl groups per molecule; and (b) a monomeric aliphatic or aromatic cyclic anhydride having one anhydride group per molecule under reaction conditions to produce acid groups and ester groups; and wherein the hydroxy-functional polymer is obtained by the copolymerization of: (i) 1-95 weight percent of a cellulose ester; and (ii) 5-99 weight percent of at least one ethylenically unsaturated alcohol copolymerizable with the cellulose ester; and (iii) 0-94 weight percent of at least one other ethylenically unsaturated monomer copolymerizable with the cellulose ester and the ethylenically unsaturated alcohol.
Claim 2
Dependent Claim 111 words
A carboxylic acid-functional polymer which comprises the reaction products obtained by reacting: (a) a hydroxy-functional polymer having an average of at least two hydroxyl groups per molecule; and (b) a monomeric aliphatic or aromatic cyclic anhydride having one anhydride group per molecule under reaction conditions to produce acid groups and ester groups; and wherein the hydroxy-functional polymer is obtained by the copolymerization of: (i) 1-95 weight percent of a cellulose ester; and (ii) 5-99 weight percent of at least one ethylenically unsaturated alcohol copolymerizable with the cellulose ester; and (iii) 0-94 weight percent of at least one other ethylenically unsaturated monomer copolymerizable with the cellulose ester and the ethylenically unsaturated alcohol.
Claim 3
Dependent Claim 17 words
The acid functional polymer of claim 1 further characterized in that the cyclic anhydride is maleic anhydride.
Claim 4
Dependent Claim 24 words
The acid-functional polymer of claim 1 further characterized in that the polymer has an average of at least two carboxylic acid groups per molecule.
Claim 5
Dependent Claim 35 words
The acid-functional polymer of claim 1 further characterized in that the hydroxy-functional polymer and the cyclic anhydride are each present at a level to provide at least about 0.3 anhydride groups for each hydroxyl group.
Claim 6
Dependent Claim 39 words
The acid-functional polymer of claim 4 further characterized in that the hydroxy-functional polymer and the cyclic anhydride are each present at a level to provide about 0.3 to 1.0 anhydride groups for each hydroxyl group in the hydroxy-functional polymer.
Claim 7
Dependent Claim 66 words
The acid-functional polymer of claim 1 further characterized in that the hydroxy-functional polymer is obtained by the copolymerization of: (a) 1-35 weight percent of a cellulose ester; and (b) 5-35 weight percent of at least one ethylenically unsaturated alcohol copolymerizable with the cellulose ester; and (c) 0-94 percent of at least one other ethylenically unsaturated monomer copolymerizable with the cellulose ester and the ethylenically unsaturated alcohol.
Claim 8
Dependent Claim 71 words
The acid-functional polymer of claim 1 further characterized in that the hydroxy-functional polymer is obtained by the copolymerization of: (a) 1-35 weight percent of a cellulose ester; and (b) 5-35 weight percent of at least one ethylenically unsaturated alcohol copolymerizable with the cellulose ester; and (c) 1-50 percent styrene; and (d) 0-93 percent of at least one other ethylenically unsaturated monomer copolymerizable with the cellulose ester and the ethylenically unsaturated alcohol.
Claim 9
Dependent Claim 17 words
The acid-functional polymer of claim 1 further characterized in that the cellulose ester is cellulose acetate butyrate.
Claim 10
Dependent Claim 18 words
The acid-functional polymer of claim 1 further characterized in that the cellulose ester is a carboxylated cellulose ester.

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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1992-08-21 1993-02-20 1993-08-22 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1996-08-21 1997-02-20 1997-08-22 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2000-08-21 2001-02-20 2001-08-22 $7700.00 Window Closed / Lapsed

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