Resin composition, seamless belt, and image forming apparatus

Patent metadata

Field	Value
Publication number	US-9405235-B2
Application number	US-201414185055-A
Country	US
Kind code	B2
Filing date	Feb 20, 2014
Priority date	Feb 27, 2013
Publication date	Aug 2, 2016
Grant date	Aug 2, 2016

Abstract

Provided is a resin composition including at least: polyolefin in an amount of from 50% by mass to 90% by mass; an electro-conductive agent; and a compound represented by General Formula (1) below,

In General Formula (1), R is preferably a divalent group having a number overage molecular weight of 1,000 or greater and derived from acrylic polymer.

First claim

What is claimed is:

1. A resin composition, comprising:
a polyolefin in an amount of from 50% by mass to 90% by mass based on the total mass of resin composition;
an electro-conductive agent; and
a compound, oligomer, or polymer represented by General Formula (1) below,

where in General Formula (1), l and m represent natural numbers, R represents straight-chain or branched alkylene group having 20 or more carbon atoms, a divalent group having a number average molecular weight of 1,000 or greater and represented by General Formula (2) below, or a divalent group derived from acrylic polymer, polyurethane, or polyamide and having a number average molecular weight of 1,000 or greater when m is 20 or greater, or R represents a divalent group having a number average molecular weight of 1,000 or greater and represented by General Formula (2) below when m is 19 or less, Y 1 and Y 2 may be same as or different from each other, and represent hydrogen atom, alkyl group having 1 to 7 carbon atoms, aralkyl group having 1 to 7 carbon atoms, or aryl group having 1 to 7 carbon atoms, X represents alkylene group having 1 to 4 carbon atoms, W 1 and W 2 may be same as or different from each other, and represent ester group, ether group, amino group, amide group, carbonate group, acid anhydride group, urethane group, urea group, or a single bond,

where in General Formula (2), n represents a natural number, Z represents hydrogen atom, methyl group, phenyl group, or —O—R 1 , and R 1 represents straight-chain or branched alkyl group having 1 to 4 carbon atoms,
wherein the polyolefin includes both a homopolymer and a copolymer, and
wherein the resin composition satisfies Mathematical Formula (2) below,
1≦|( a )−( b )|≦20   (2)

where (a) represents melt flow rate (MFR) of the homopolymer of the polyolefin, and (b) represents MFR of the copolymer of the polyolefin.

2. The resin composition according to claim 1 ,
wherein in General Formula (1), R represents a divalent group having a number average molecular weight of 1,000 or greater when m is 20 or greater and derived from acrylic polymer.

3. The resin composition according to claim 1 ,
wherein the resin composition satisfies Mathematical Formula (1) below,
1≦(Δ H 2 −ΔH 1)×100 /ΔH 1≦30  Mathematical Formula (1)

where ΔH1 represents an amount of heat of melting ΔH (J/g) of the resin composition at a first temperature raising of differential scanning calorimetry (DSC), and ΔH2 represents an amount of heat of melting ΔH (J/g) of the resin composition at a second temperature raising of DSC.

4. The resin composition according to claim 1 ,
wherein a molecular weight distribution of the polyolefin measured by gel permeation chromatography (GPC) comprises 2 or more peaks.

5. The resin composition according to claim 1 ,
wherein the homopolymer of the polyolefin is polyvinylidene fluoride, and
wherein the copolymer of the polyolefin is a copolymer that comprises vinylidene fluoride and hexafluoropropylene as monomer components.

Assignees

• Matsushita Makoto
• Izutani Akira
• Nozaki Chiyoshi
• Ricoh Co Ltd

Inventors

• Matsushita Makoto
• Izutani Akira
• Nozaki Chiyoshi

Classifications

• C08L51/06

  grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond · CPC title

• C08L53/00

  Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers · CPC title

• C08K2201/001

  Conductive additives · CPC title

• C08L27/16

  Homopolymers or copolymers or vinylidene fluoride · CPC title

• C08L23/00

  Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers · CPC title