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# (12) United States Patent 

# Gan et al. 

# (54) EPOXY RESINS AND PROCESS FOR MAKING THE SAME 

(75) Inventors: Joseph Gan, Strasbourg (FR); Emile C. Trottier, Renchen (DE) 

(73) Assignee: Dow Global Technologies Inc., Midland, MI (US) 

( *) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by O days. 

(21) Appl. No.: 10/007,518 

(22) Filed: Dec. 5, 2001 

## (65) Prior Publication Data 

US 2002/0128428 Al Sep. 12, 2002 

(60) Provisional application No. 60/255,649, filed on Dec. 14, 2000. 

(51) Int. Cl.7 .......................... C0SG 59/15; C08L 63/02 

(52) U.S. Cl. ......................... 525/523; 525/533; 528/89; 528/93; 528/112; 528/119 

(58) Field of Search ................................. 525/523, 533; 528/89, 93, 112, 119 

## (56) References Cited 

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## Related U.S. Application Data 

## U.S. PATENT DOCUMENTS 

<img src='content_image/929890.jpg'>

# (10) Patent No.: US 6,555,628 B2 

# (45) Date of Patent: Apr. 29, 2003 

EP 0 193 809 11/1990 

U.S. application Ser. No. 60/255,649, filed Dec. 14, 2000; "Epoxy Resins and Process for Making the Same". U.S. application Ser. No. 08/875,969, filed Feb. 10, 1995; "Epoxy Resin Composition Capable of Cure at Low Tem› perature". 

U.S. application Ser. No. 60/213,965, filed Jun. 23, 2000; "Epoxy Resins and Process for Making the Same". 

Primary Examiner-Margaret G. Moore 

Assistant Examiner-D. Aylward (74) Attorney, Agent, or Firm---Nemia C. Damocles 

## (57) ABSTRACT 

A controlled conversion resin having an epoxy functionality of greater than 2 and comprising moieties derived from epoxy resin, dihydric phenol, acid anhydride, or amine. The resin is prepared by reacting an epoxy resin with a dihydric phenol, an acid anhydride, or amine or other branching agent in the presence of a catalyst and terminating the reaction at a point such that the reaction product contains both epoxy and terminal hydroxyl groups. 

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US006555628B2 

## FOREIGN PATENT DOCUMENTS 

## OTHER PUBLICATIONS 

## 32 Claims, No Drawings 

