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1. 发明公开

US20230323241A1 VISCOSITY INDEX IMPROVER AND LUBRICATING OIL COMPOSITION 审中-公开
公开(公告)号：US20230323241A1
公开(公告)日：2023-10-12
申请号：US18025430
申请日：2021-09-14
申请人： SANYO CHEMICAL INDUSTRIES, LTD.
发明人： Nobuhiro NAITO , Satoshi MATSUMOTO , Masahiro HASHIMOTO , Kenyuu YOSHIDA , Hiroki YAMASHITA , Ryota SATO
IPC分类号： C10M169/04 , C10M105/36 , C10M105/34 , C10M105/02 , C10M149/10
CPC分类号： C10M169/041 , C10M105/36 , C10N2030/02 , C10M105/02 , C10M149/10 , C10M105/34
摘要： The present invention aims to provide a viscosity-index improving agent having an excellent friction reduction effect to reduce friction of a lubricating oil composition when the viscosity-index improving agent is added thereto. The present also aims to provide a lubricating oil composition containing the viscosity-index improving agent. The present invention relates to, for example, a viscosity-index improving agent containing: (co)polymer (A) containing, as an essential constituent monomer, a polyolefin-based monomer (a) represented by the following formula (1); an ester oil (B1) having a kinematic viscosity at 100° C. of 1.00 to 2.50 mm2/s; and an ester oil (B2) having a kinematic viscosity at 100° C. of 2.51 to 5.00 mm2/s:

wherein R1 is a hydrogen atom or a methyl group; —X1— is a group represented by —O—, —O(AO)m-, or —NH—, A is a C2-C4 alkylene group, m is an integer of 1 to 10, and each A may be the same or different when m is 2 or more; R2 is a residue after removal of one hydrogen atom from a hydrocarbon polymer containing a 1,2-butylene group as a structural unit; and p represents a number of 0 or 1.

2. 发明公开

US20230340357A1 VISCOSITY INDEX IMPROVER COMPOSITION AND LUBRICATING OIL COMPOSITION 审中-公开
公开(公告)号：US20230340357A1
公开(公告)日：2023-10-26
申请号：US18021222
申请日：2021-08-20
申请人： SANYO CHEMICAL INDUSTRIES, LTD.
发明人： Nobuhiro NAITO , Hiroki YAMASHITA , Kenyuu YOSHIDA , Hiroki HAGIHARA
IPC分类号： C10M169/04 , C10M145/14 , C10M129/06
CPC分类号： C10M145/14 , C10M129/06 , C10M169/044 , C10N2030/02
摘要： The present invention aims to provide a viscosity index improver composition capable of providing a lubricant composition that has an excellent viscosity index improving effect, excellent antifoaming properties, and excellent persistence of the antifoaming properties. The present invention relates to a viscosity index improver composition, containing: a (co)polymer (A) containing a monomer (a) represented by the following formula (1) as an essential monomer; a C18-C40 chain aliphatic alcohol (B); and a base oil,

wherein R1 is a hydrogen atom or a methyl group; -X1- is a group represented by —O— or —NH—; R2 is a C2-C4 alkylene group; R3 and R4 are each independently a C8-C24 linear or branched alkyl group; and p is an integer of 0 to 20, with each R2 being optionally the same as or different from each other when p is 2 or greater.

3. 发明公开

US20230312797A1 VISCOSITY INDEX IMPROVING AGENT AND LUBRICATING OIL COMPOSITION 审中-公开
公开(公告)号：US20230312797A1
公开(公告)日：2023-10-05
申请号：US18025238
申请日：2021-09-14
申请人： SANYO CHEMICAL INDUSTRIES, LTD.
发明人： Nobuhiro NAITO , Satoshi MATSUMOTO , Masahiro HASHIMOTO , Kenyuu YOSHIDA , Hiroki YAMASHITA , Ryota SATO
IPC分类号： C08F279/02 , C08K5/101 , C08K5/01
CPC分类号： C08F279/02 , C08K5/101 , C08K5/01
摘要： The present invention aims to provide a viscosity-index improving agent capable of providing a lubricating oil composition having an appropriate gelation index, an excellent HTHS viscosity at 100° C., and an excellent kinematic viscosity at 40° C. when the viscosity-index improving agent is added thereto. The present also aims to provide a lubricating oil composition containing the viscosity-index improving agent. The present invention relates to, for example, a viscosity-index improving agent containing a copolymer (A) and an ester oil (Z), the copolymer A containing, as constituent monomers, a polyolefin-based monomer (a) represented by the following formula (1), a monomer (b) represented by the following formula (2) in which R4 is a C4 alkyl group, and at least one of a monomer (c) represented by the following formula (3) and a monomer (d) represented by the following formula (2) in which R4 is a C2-C3 alkyl group:

wherein R1 is a hydrogen atom or a methyl group; —X1— is a group represented by —O—, —O(AO)m—, or —NH—, A is a C2-C4 alkylene group, m is an integer of 1 to 10, and each A may be the same or different when m is 2 or more; R2 is a residue after removal of one hydrogen atom from a hydrocarbon polymer containing a 1,2-butylene group as a structural unit; and p represents a number of 0 or 1;

wherein R3 is a hydrogen atom or a methyl group; —X2— is a group represented by —O— or —NH—; and R4 is a C2-C4 alkyl group;

wherein R5 is a hydrogen atom or a methyl group; —X3— is a group represented by —O— or —NH—; R6 is a C2-C4 alkylene group; R7 is a C1-C8 alkyl group; and r is an integer of 1 to 20, and each R6 may be the same or different when r is 2 or more.

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