[특허]Proppant with polyurea-type coating

Proppant with polyurea-type coating 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C09K-008/80
출원번호	US-0345283 (2016-11-07)
등록번호	US-10208242 (2019-02-19)
발명자 / 주소	McCrary, Avis Lloyd McDaniel, Robert Ray Barthel, Ralph Edward Monastiriotis, Spyridon
출원인 / 주소	PREFERRED TECHNOLOGY, LLC
대리인 / 주소	Pepper Hamilton LLP
인용정보	피인용 횟수 : 0 인용 특허 : 145

초록 ▼

Proppants for hydraulic fracturing of oil and gas wells are coated with a polyurea-type coating. In a preferred embodiment, the polyurea-type coating is formed by contacting a polymeric isocyanate with an amount of water a blowing catalyst at a rate and quantity sufficient to generate a reactive amine in situ on the outer surface of the proppant which thereby reacts with unconverted polymeric isocyanate to form a thin polyurea-type surface coating that is substantially solid and lacks foam or substantial porosity. Alternatively, the polyurea-type can be produced by selecting reactive amine compounds and isocyanates to develop the coated proppant. The coated proppants retain the discrete, free-flowing character of the original core solids but with the beneficial effects of the polyurea-type coating of the present invention.

대표청구항 ▼

1. A method for the production of a coated proppant that is coated with a substantially foam-free polyurea-type coating, the method comprising: contacting a heated proppant core solid with:(a) an isocyanate comprising at least one reactive isocyanate group; and(b) a mixture of water and a curing agent and/or catalyst in amounts sufficient to promote the formation of said substantially foam-free, polyurea-type coating,wherein said water is contacted with said isocyanate at a rate sufficient to form a reactive amine that then reacts with additional isocyanate to form said polyurea-type coating on said proppant,wherein the proppant core solid, water and isocyanate are added a rate sufficient to maintain a proportion of 5-30 wt % water to 95-70% isocyanate. 2. The method of claim 1, wherein the isocyanate and the mixture of the water and the curing agent and/or catalyst are contacted with the heated proppant core simultaneously. 3. The method of claim 1, wherein the isocyanate and the mixture of the water and the curing agent and/or catalyst are contacted with the heated proppant core sequentially. 4. The method of claim 1, wherein said proppant core solid is sand or ceramic. 5. The method of claim 1, wherein said isocyanate comprises a polymer or an oligomer of an isocyanate. 6. The method of claim 1, wherein said catalyst comprises bis-dimethylaminoethylether or bis-morpholinium diethylether. 7. The method of claim 1, wherein said heated proppant core solid has been heated to a temperature from 50-175° C. before being contacted with the isocyanate or water. 8. The method of claim 1, wherein said proppant core solid has been heated to a temperature from 75-125° C. before being contacted with the isocyanate or water. 9. The method of claim 1, wherein said polyurea-type coating is present on said proppant core solid in an amount of 1-5 wt % based on total weight of the coated proppant. 10. The method of claim 1, wherein said method further comprises contacting said the heated proppant core solid with a silane adhesion promoter before contact with said isocyanate or said mixture. 11. The method of claim 1, wherein the heated proppant core solid is a polyurethane-coated proppant core solid. 12. The method of claim 1, wherein the heated proppant core solid is a phenolic-resin-coated proppant core solid. 13. The method of claim 1, wherein said polyurea-type coating is cross-linked. 14. A coated proppant prepared according to a method of claim 1. 15. A coated proppant prepared according to a method of claim 11. 16. A coated proppant prepared according to a method of claim 12.

이 특허에 인용된 특허 (145)

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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

내보내기 구분	파일저장 인쇄 메일전송
구성항목	기본정보 상세정보 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표IPC 관리번호, 국가코드, 자료구분, 상태, 출원번호, 출원일자, 공개번호, 공개일자, 공고번호, 공고일자, 등록번호, 등록일자, 발명명칭(한글), 발명명칭(영문), 출원인(한글), 출원인(영문), 출원인코드, 대표출원인, 출원인국적, 출원인주소, 발명자, 발명자E, 발명자코드, 발명자주소, 발명자 우편번호, 발명자국적, 대표IPC, IPC코드, 요약, 미국특허분류, 대리인주소, 대리인코드, 대리인(한글), 대리인(영문), 국제공개일자, 국제공개번호, 국제출원일자, 국제출원번호, 우선권, 우선권주장일, 우선권국가, 우선권출원번호, 원출원일자, 원출원번호, 지정국, Citing Patents, Cited Patents
저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

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