[특허]Ductile coating composition of an acrylic polymer having reactive sites and an epoxy resin

[미국특허] Ductile coating composition of an acrylic polymer having reactive sites and an epoxy resin 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C08L-063/10
출원번호	US-0428723 (1973-12-27)
발명자 / 주소	Wu Souheng (Wilmington DE)
출원인 / 주소	E. I. Du Pont de Nemours and Company (Wilmington DE 02)
인용정보	피인용 횟수 : 55 인용 특허 : 0

초록 ▼

The liquid coating composition of this invention is useful as a formable coating for the interior of cans and contains the following compatible mixture of film-forming constituents: A. AN ACRYLIC POLYMER THAT HAS AT LEAST TWO OR MORE REACTIVE SITES PER CHAIN SUCH AS CARBOXYL, HYDROXYL, EPOXIDE, METHYLOL, AMINE OR AMIDE AND HAS A NUMBER AVERAGE MOLECULAR WEIGHT ABOVE 10,000 AND A GLASS TRANSITION TEMPERATURE OF -20°C to +60°C; and B. AN EPOXY RESIN THAT HAS AT LEAST ONE EPOXIDE GROUP IN COMBINATION WITH AT LEAST ONE HYDROXYL GROUP OR EPOXIDE GROUP OR COMBINATION THEREOF PER POLYMER CHAIN AND HAS A NUMBER AVERAGE MOLECULAR WEIGHT OF 300 TO 20,000; WHEREIN THE FILM-FORMING CONSTITUENTS IN THE FULLY CURED STATE HAVE A BRITTLE DUCTILE TRANSITION TEMPERATURE OF -40°C to +20°C measured at an elongation rate of 10% per minute.

대표청구항 ▼

A coating composition consisting essentially of a compatible mixture of film-forming constituents in a liquid carrier; wherein the film-forming constituents consist essentially of a. 60-95% by weight of an acrylic polymer of hard and soft segments and having a number average molecular weight of about 25,000-70,000 determined according to gel permeation chromatography and a glass transition temperature of about -20°C. to +60°C. and wherein the acrylic polymer consists essentially of polymerized units of about 10-50% by weight of styrene, methyl styrene, methyl methacrylate or acrylonitrile, 40-89.5% by weight of an alkyl acrylate having 1-18 carbon atoms in the alkyl group or an alkyl methacrylate having 2-18 carbon atoms in the alkyl group, 0.5-10% by weight of an unsaturated carboxylic acid; and b. 5-40% by weight of an epoxy resin having at least one vic epoxy group in combination with at least one hydroxyl group or epoxide group or mixture thereof per polymer chain and having a number average molecular weight of 300 to 20,000 determined as above; wherein the film-forming constituents in the fully cured state have a brittle ductile transition temperature of about -40°C. to +20°C. measured at an elongation rate of 10% per minute on an Instron testing machine using a free film about 2.0-4.0 mils thick of the fully cured composition. The coating composition of claim 1 containing 25-50% by weight of film-forming constituents in a solvent for the film-forming constituents; wherein the film-forming constituents consist essentially of a. 70-80% by weight, based on the weight of the film-forming constituents of an acrylic polymer consisting essentially of polymerized units of about 30-40% by weight of methyl methacrylate, 50-65% by weight of ethyl acrylate, and 5-10% by weight of acrylic acid; and b. 20-30% by weight, based on the weight of the film-forming constituents, of an epoxy resin of the formula where n is a positive integer sufficiently large to provide a number average molecular weight of 300 to 20,000 and having an epoxide equivalent of 875-2500.

이 특허를 인용한 특허 (55) 인용/피인용 타임라인 분석

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Ductile coating composition of an acrylic polymer having reactive sites and an epoxy resin 원문보기