[미국특허]
Water-borne coating composition made from modified epoxy resin, polymeric acid and tertiary amine
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C08L-033/00
C08L-033/02
C08L-063/10
C08L-063/00
출원번호
US-0175397
(1980-08-05)
발명자
/ 주소
Steinmetz William H. (Collingswood NJ)
출원인 / 주소
E. I. Du Pont de Nemours and Company (Wilmington DE 02)
인용정보
피인용 횟수 :
40인용 특허 :
8
초록▼
Water-borne reaction products of (a) carboxylfunctional polymers; (b) modified polyepoxides; and (c) tertiary amines are useful as film-forming components of coating compositions which can be spray-, flow-, dip-, roller-, or electro-coated. The coating compositions are useful as such or can be cross
Water-borne reaction products of (a) carboxylfunctional polymers; (b) modified polyepoxides; and (c) tertiary amines are useful as film-forming components of coating compositions which can be spray-, flow-, dip-, roller-, or electro-coated. The coating compositions are useful as such or can be crosslinked with crosslinking agents such as a nitrogen resin and, when coated on metal and paper substrates, they provide coatings of improved properties, including a high degree of flexibility during machining and stamping of the coated articles, corrosion resistance, gloss, hydrolytic stability, and nonadulterating of foods and beverages in contact therewith.
대표청구항▼
A water-borne coating composition consisting essentially of liquid carrier and the product of the reaction in aqueous media of: (A) not less than 50% by weight, based on the weight of (A) plus (B), of a modified polyepoxide in the form of an ester, an ether, or a phenolic hydroxyl which contained, p
A water-borne coating composition consisting essentially of liquid carrier and the product of the reaction in aqueous media of: (A) not less than 50% by weight, based on the weight of (A) plus (B), of a modified polyepoxide in the form of an ester, an ether, or a phenolic hydroxyl which contained, prior to modification, on the average, two terminal 1,2-epoxy groups per molecule and had an epoxy equivalent weight of 750-5000, said modification being done by reacting at least about 25% of the epoxy groups with at least one of groups selected from monobasic acids to form esters, monohydric phenols to form ethers, or polyhydric phenols to form phenolic hydroxyl terminated polymers; (B) a carboxyl-functional polymer in an amount sufficient to provide at least 1.25 equivalents of carboxyl groups, when the source of the carboxyl group is a monoprotic acid, and at least 2.0 equivalents of carboxyl groups, when the source of such groups is a diprotic acid, per equivalent of 1,2-epoxy groups in the epoxy resin, said polymer having a number average molecular weight (determined by gel permeation chromatography) of about 2,000-100,000 and an acid number of 100-500; (C) at least 1.25 equivalents of a tertiary amine per equivalent of 1,2-epoxy groups in the epoxy resin, said tertiary amine being selected from the group consisting of R1R2R3N, pyridine, N-methylpyrrole, N-methyl piperidine, N-methyl pyrrolidine, N-methyl morpholine, and mixtures thereof and wherein R1 and R2 are substituted or unsubstituted monovalent alkyl groups containing one or two carbon atoms in the alkyl portion and R3 is a substituted or unsubstituted monovalent alkyl group containing 1-4 carbon atoms; and (D) optionally, 10-90% of the amount required for stoichiometric reaction with the carboxyl-functional polymer of (B) of at least one primary, secondary or tertiary amine or monofunctional quaternary ammonium hydroxide; wherein for increasing ratios of carboxyl groups to 1,2-epoxy groups, the amount of amine is increased to keep the carboxyl-functional polymer water dispersible, in which reaction product at least about 50% of the epoxide groups on the modified polyepoxides are in the form of quaternary ammonium salts.
Bosso Joseph F. (Lower Burrell PA) Wismer Marco (Gibsonia PA), Coating compositions comprising aqueous dispersions of quaternary ammonium base group-containing polymers and a curing a.
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