Polycarbonates, uses thereof, processes for preparing and purifying same

• US 5,294,356 A
• Filed: 05/14/1992
• Issued: 03/15/1994
• Est. Priority Date: 09/17/1990
• Status: Expired due to Fees

• Current Assignee: Mitsui Chemicals Incorporated (Mitsui Chemicals)
• Original Assignee: Mitsui Petrochemical Industries, Ltd. (Mitsui Chemicals)
• Inventors: Nakamura, Kosei, Tanaka, Masahide, Hayashi, Tetsuo, Kiso, Yoshihisa, Shimamoto, Kenji, Mizui, Kinya, Takahata, Kazunori, Fujimoto, Tadaaki
• Primary Examiner(s): Johnson, Jerry D.
• Application Number:
  US07/856,956
• Time in Patent Office: 670 Days
• Field of Search: 558/265, 558/266, 252/56 R, 252/52 A, 252/68
• US Class Current: 508/462
• CPC Class Codes: C07C 69/96 Esters of carbonic or haloformic acids
• CPC Class Codes: C07H 15/08 Polyoxyalkylene derivatives
• CPC Class Codes: C08G 64/0208 saturated
• CPC Class Codes: C10M 105/48 of carbonic acid
• CPC Class Codes: C10M 171/008 Lubricant compositions compatible with refrigerants
• CPC Class Codes: C10M 2207/32 of carbonic acid
• CPC Class Codes: C10M 2209/00 Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
• CPC Class Codes: C10M 2209/02 Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: C10M 2209/10 Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: C10N 2040/00 Specified use or application for which the lubricating composition is intended
• CPC Class Codes: C10N 2040/04 Oil-bath; Gear-boxes; Automatic transmissions; Traction drives
• CPC Class Codes: C10N 2040/042 for automatic transmissions
• CPC Class Codes: C10N 2040/044 for manual transmissions
• CPC Class Codes: C10N 2040/046 for traction drives
• CPC Class Codes: C10N 2040/08 Hydraulic fluids, e.g. brake-fluids
• CPC Class Codes: C10N 2040/16 Dielectric; Insulating oil or insulators
• CPC Class Codes: C10N 2040/17 for electric contacts
• CPC Class Codes: C10N 2040/24 without essential removal of material , e.g. forming, gorging, drawing, pressing, stamping, rolling or extruding; Punching metal
• CPC Class Codes: C10N 2040/241 Manufacturing joint-less pipes
• CPC Class Codes: C10N 2040/242 Hot working
• CPC Class Codes: C10N 2040/243 : Cold working
• CPC Class Codes: C10N 2040/244 : of specific metals
• CPC Class Codes: C10N 2040/245 : Soft metals, e.g. aluminum
• CPC Class Codes: C10N 2040/246 : Iron or steel
• CPC Class Codes: C10N 2040/247 : Stainless steel
• CPC Class Codes: C10N 2040/30 : Refrigerators lubricants or compressors lubricants
• CPC Class Codes: C10N 2040/32 : Wires, ropes or cables lubricants
• CPC Class Codes: C10N 2040/34 : Lubricating-sealants
• CPC Class Codes: C10N 2040/36 : Release agents or mold release agents
• CPC Class Codes: C10N 2040/38 : Conveyors or chain belts
• CPC Class Codes: C10N 2040/40 : Generators or electric motors in oil or gas winning field
• CPC Class Codes: C10N 2040/42 : Flashing oils or marking oils
• CPC Class Codes: C10N 2040/44 : Super vacuum or supercritical use
• CPC Class Codes: C10N 2040/50 : Medical uses
• CPC Class Codes: H01B 3/20 : liquids, e.g. oils silicone oils H01B3/46

Abstract

The polycarbonates of the present invention include those of sucrose series having a specific cyclic structure, those of oligosaccharide and monosaccharide series other than the sucrose series, those derived from specific saccharides having no cyclic structure, those having a skeletal structure of pentaerythritol, neopentyl glycol or trimethylolmethane, and specific dicarbonates.

The lubricating oil and electrical insulating oil of the invention contain the above-mentioned polycarbonates.

The polycarbonates of the invention are excellent in compatibility with Freon R-134a (HFC) as well as in lubricating properties, detergency and electrical insulating properties, and are capable of providing lubricating oil for refrigerator, automotive engine oil, automotive gear oil, lubricating oil for rolling and lubricating oil for fiber, especially lubricating oil for which electrical insulating properties are required, and electrical insulating oil.

Claims

1. A polycarbonate represented by the following general formula [II]:

space="preserve" listing-type="equation">(R.sub.1 O)CH.sub.2 [CH(OR.sub.1)].sub.m CH.sub.2 (OR.sub.1) [II]

wherein R₁ is a group represented by the following formula (E) or (F), and m is an integer of 1 to 6;

space="preserve" listing-type="equation">--(C.sub.3 H.sub.6 O).sub.n COOR.sub.2 (E)

wherein each R₂ is independently a hydrocarbon group having not more than 30 carbon atoms or a hydrocarbon group containing an ether bond and having 2 to 30 carbon atoms, and n is an integer of 1 to 12,

space="preserve" listing-type="equation">--(C.sub.3 H.sub.6 O).sub.n (C.sub.2 H.sub.4 O).sub.p COOR.sub.2 (F)

wherein each R₂ is independently a hydrocarbon group having not more than 30 carbon atoms or a hydrocarbon containing an ether bond and having 2 to 30 carbon atoms, n and p are an integer of 1 to 12.

2. A lubricating oil containing a polycarbonate represented by the following general formula [II]:

space="preserve" listing-type="equation">(R.sub.1 O)CH.sub.2 [CH(OR.sub.1)].sub.m CH.sub.2 (OR.sub.1) [II]

wherein R₁ is a group represented by the following formula (E) or (F), and m is an integer of 1 to 6;

space="preserve" listing-type="equation">--(C.sub.3 H.sub.6 O).sub.n COOR.sub.2 (E)

wherein each R₂ is independently a hydrocarbon group having not more than 30 carbon atoms or a hydrocarbon group containing an ether bond and having 2 to 30 carbon atoms, and n is an integer of 1 to 12,

space="preserve" listing-type="equation">--(C.sub.3 H.sub.6 O).sub.n (C.sub.2 H.sub.4 O).sub.p COOR.sub.2 (F)

wherein each R₂ is independently a hydrocarbon group having not more than 30 carbon atoms or a hydrocarbon group containing an ether bond and having 2 to 30 carbon atoms, n and p are an integer of 1 to 12.

3. A lubricating oil for refrigerator containing:

(i) a polycarbonate represented by the formula (II)

space="preserve" listing-type="equation">(R.sub.1 O)CH.sub.2 (CH(OR.sub.1)).sub.m CH.sub.2 (OR.sub.1) (II)

wherein R₁ is a group represented by the following formulae (E) or (F), and m is an integer of 1 to 6,

space="preserve" listing-type="equation">--(C.sub.3 H.sub.6 O).sub.n COOR.sub.2 (E)

wherein each R₂ is independently a hydrocarbon group having not more than 30 carbon atoms or a hydrocarbon group containing an ether bond and having 2 to 30 carbon atoms, and n is an integer of 1 to 12,

space="preserve" listing-type="equation">--(C.sub.3 H.sub.6 O).sub.n (C.sub.2 H.sub.4 O).sub.p COOR.sub.2 (F)

wherein each R₂ is independently a hydrocarbon group having not more than 30 carbon atoms or a hydrocarbon group containing an ether bond and having 2 to 30 carbon atoms, n and p are an integer of 1 to 12; and

(ii) (a) an ozone layer non-destructive hydrogenated fluorocarbon, or

(b) a small ozone depletion potential hydrogenated chlorofluorocarbon, or

(c) a mixture of (a) and (b).

4. A lubricating oil for refrigerator containing:

(i) a polycarbonate represented by the formula (II)

space="preserve" listing-type="equation">(R.sub.1 O)CH.sub.2 (CH(OR.sub.1)).sub.m CH.sub.2 (OR.sub.1) (II)

wherein R₁ is a group represented by the following formulae (E) or (F), and m is an integer of 1 to 6,

space="preserve" listing-type="equation">--(C.sub.3 H.sub.6 O).sub.n COOR.sub.2 (E)

wherein each R₂ is independently a hydrocarbon group having not more than 30 carbon atoms or a hydrocarbon group containing an ether bond and having 2 to 30 carbon atoms, and n is an integer of 1 to 12,

space="preserve" listing-type="equation">--(C.sub.3 H.sub.6 O).sub.n (C.sub.2 H.sub.4 O).sub.p COOR.sub.2 (F)

wherein each R₂ is independently a hydrocarbon group having not more than 30 carbon atoms or a hydrocarbon group containing an ether bond and having 2 to 30 carbon atoms, n and p are an integer of 1 to 12; and

(ii) an ozone layer non-destructive refrigerant.