Conveyor lubricant, passivation of a thermoplastic container to stress cracking and thermoplastic stress crack inhibitor
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C10M-173/00
C10M-139/00
출원번호
US-0614474
(2003-07-07)
등록번호
US-7384895
(2008-06-10)
발명자
/ 주소
Person Hei,Kimberly L.
Herdt,Joy G.
Minyu,Li
Lokkesmoe,Keith Darrell
Wei,Quang Jong Jason
Besse,Michael E.
출원인 / 주소
Ecolab Inc.
대리인 / 주소
Merchant & Gould P.C.
인용정보
피인용 횟수 :
9인용 특허 :
101
초록▼
Thermally formed thermoplastic articles can be protected from stress cracking in the presence of stress cracking promoting compounds by forming a shaped article comprising a thermoplastic and a liquid hydrocarbon oil composition. We have found that the liquid hydrocarbon oil composition prevents the
Thermally formed thermoplastic articles can be protected from stress cracking in the presence of stress cracking promoting compounds by forming a shaped article comprising a thermoplastic and a liquid hydrocarbon oil composition. We have found that the liquid hydrocarbon oil composition prevents the stress cracking promoting materials from interacting with the polymeric structure of the stressed container to prevent or inhibit stress cracking in such materials. The methods and compositions of the invention are particularly useful in preventing stress cracking in polyethylene terephthalate beverage containers during bottling operations during which the bottle is contacted with aqueous and non-aqueous materials such as cleaners and lubricants that can interact with the polyester to cause stress cracking particularly in the container base. A process for lubricating a container, such as a beverage container, or a conveyor for containers, by applying to the container or conveyor, a thin continuous, substantially non-dripping layer of a liquid lubricant. The process provides many advantages compared to the use of a conventional dilute aqueous lubricant.
대표청구항▼
We claim: 1. A conveyor and container lubricant composition comprising: about 0.05 to about 12 wt-% silicone material; and about 30 to about 99.95 wt-% water miscible lubricant. 2. The lubricant composition of claim 1, comprising: about 0.5 to about 8 wt-% silicone material; and about 50 to abou
We claim: 1. A conveyor and container lubricant composition comprising: about 0.05 to about 12 wt-% silicone material; and about 30 to about 99.95 wt-% water miscible lubricant. 2. The lubricant composition of claim 1, comprising: about 0.5 to about 8 wt-% silicone material; and about 50 to about 90 wt-% water-miscible lubricant; and further comprising about 2 to about 49.5 wt-% of water or hydrophilic diluent. 3. The lubricant composition of claim 2, comprising: about 0.8 to about 4 wt-% silicone material; and about 65 to about 85 wt-% water-miscible lubricant; and further comprising about 11 to about 34.2 wt-% of water or hydrophilic diluent. 4. The lubricant composition of claim 1, wherein: the silicone material comprises silicone emulsion, finely divided silicone powder, or silicone surfactant; and the water-miscible lubricant comprises a hydroxy-containing compound, polyalkylene glycol, copolymer of ethylene and propylene oxides, sorbitan ester, or derivative thereof. 5. The lubricant composition of claim 1, wherein: the silicone material comprises silicone emulsion, finely divided silicone powder, or silicone surfactant; and the water-miscible lubricant comprises a phosphate ester, amine, or derivative thereof. 6. The lubricant composition of claim 1, comprising a silicone emulsion. 7. The lubricant composition of claim 6, wherein the mixture is substantially free of surfactants aside from those that may be employed to form the silicone emulsion. 8. The lubricant of claim 1, wherein the silicone material comprises a polymer containing silicone. 9. The lubricant of claim 8, wherein the polymer comprises a polydimethyl siloxane, a polyalkyl siloxane, a polyphenyl siloxane, or a mixture thereof. 10. A method of lubricating a container or conveyor for the container, comprising: applying to at least a portion of a surface of the container or cenveyor a conveyor and container lubricant composition comprising: a water-miscible silicone material; and a water-miscible lubricant. 11. A conveyor lubricant composition comprising: about 0.8 to about 4 wt % oleophilic lubricating material; and about 30 to about 99.95 wt % of hydrophilic lubricant material. 12. The composition of claim 11, wherein the hydrophilic lubricant comprises: up to about 69.95 wt % of a water diluent; and up to about 85 wt % of a hydrophilic lubricant. 13. The composition of claim 12, comprising an unstable mixture of the oleophilic lubricating material and the hydrophilic lubricating material. 14. The composition of claim 13, wherein when the composition is applied to a surface, the oleophilic lubricating material forms a film on the hydrophilic lubricating material, thereby providing a water-repelling lubricating layer having reduced water sensitivity. 15. The composition of claim 11, comprising about 65 to about 85 wt % of the hydrophilic lubricant; and further comprising about 11 to about 34.2 wt % of water diluent. 16. The composition of claim 11, wherein the composition is substantially free of surfactants that cause stress cracking in PET. 17. The composition of claim 11, comprising about 0.8 to about 4 wt % of an oleophilic silicone lubricant. 18. The composition of claim 17, wherein: the oleophilic silicone lubricant comprises a silicone fluid emulsion, finely divided silicone powder, or silicone surfactant; and the hydrophilic lubricant comprises a hydroxy-containing compound, polyalkylene glycol, copolymer of ethylene and propylene oxides, sorbitan ester, or derivative thereof. 19. The composition of claim 17, wherein the oleophilic silicone lubricant comprises the silicone fluid emulsion; and the mixture is substantially free of surfactants aside from those employed to form the silicone emulsion. 20. The composition of claim 17, wherein the oleophilic silicone lubricant comprises a polydimethyl siloxane, a polyalkyl siloxane, a polyphenyl siloxane, or a mixture thereof. 21. A method of lubricating a container and a contact surface of a conveyor surface, the method comprising: applying a lubricant composition to the container, to the contact surface, or to both the container and the contact surface, without diluting a lubricant concentrate; the lubricant composition comprising an aqueous composition comprising about 0.5 to about 8 wt-% polysiloxane. 22. The method of claim 21, comprising: spraying the lubricant composition directly onto at least a portion of the contact surface of a moving conveyor. 23. The method of claim 21, comprising: applying the lubricant composition to a moving conveyor with a mechanical device in direct contact with the conveyor surface. 24. The method of claim 21, wherein the lubricant composition further comprises a fluorinated oil, a fluorinated grease, or a mixture thereof. 25. The method of claim 24, wherein the fluorinated oil comprises a perfluoroalkylpolyether. 26. The method of claim 21, wherein the lubricant composition further comprises a fluorine-containing polymer. 27. The method of claim 26, wherein the fluorine-containing polymer comprises a polytetrafluoroethylene, a fluoroethylene-propylene copolymer, a perfluoroalkoxy resin, an ethylene-chloro-trifluoroethylene alternating copolymer, a poly(vinylidene fluoride), or a mixture thereof. 28. The method of claim 21, wherein the lubricant composition further comprises a fluorosurfactant. 29. The method of claim 21, wherein the lubricant composition further comprises a fluorochemical fluid. 30. The method of claim 21, wherein the lubricant composition is in the form of an emulsion or dispersion of a liquid lubricant in an aqueous phase. 31. The method of claim 21, wherein the lubricant composition further comprises an antimicrobial phenol; an antimicrobial organic or inorganic acid, ester thereof, or salt thereof; an antimicrobial cationic agent; an antimicrobial aldehyde; an antimicrobial dye; an antimicrobial halogen compound; or mixture thereof. 32. The method of claim 21, wherein the lubricant composition further comprises a polyol. 33. The method of claim 21, wherein the polyol comprises a glycerol or a glycol.
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