Disclosed are a multifunctionalized polyethylene glycol derivative and a preparation method therefor. The derivative has an H-shaped structure as represented by formula (1) and comprises one linear core LPEG and four PEG branch chains, where n.sub.1, n.sub.2, n.sub.3, and n.sub.4 respectively are the degrees of polymerization of the branch chains, U.sub.1 and U.sub.2 are trivalent branching groups connecting the core LPEG to two of the PEG branch chains, F.sub.1 and F.sub.2 contain a functional group or a protected form R.sub.01 thereof and may or may not contain a branched group G, correspondingly, the number of R.sub.01 is one or more, F.sub.1 and F.sub.2 are either identical or different, any one linking group in the molecule or any linking group formed with an adjacent heteroatom group can either remain stable or be degraded, and any one PEG segment in the molecule is discretely polydispersed or monodispersed. The multifunctional polyethylene glycol is flexible and diverse in terms of branch structures and the lengths of branching arms, has various parameters and performance indicators that are adjustable and easy to control, and has a broad applicability.

Disclosed are a multifunctionalized polyethylene glycol derivative and a preparation method therefor. The derivative has an H-shaped structure as represented by formula (1) and comprises one linear core LPEG and four PEG branch chains, where n.sub.1, n.sub.2, n.sub.3, and n.sub.4 respectively are the degrees of polymerization of the branch chains, U.sub.1 and U.sub.2 are trivalent branching groups connecting the core LPEG to two of the PEG branch chains, F.sub.1 and F.sub.2 contain a functional group or a protected form R.sub.01 thereof and may or may not contain a branched group G, correspondingly, the number of R.sub.01 is one or more, F.sub.1 and F.sub.2 are either identical or different, any one linking group in the molecule or any linking group formed with an adjacent heteroatom group can either remain stable or be degraded, and any one PEG segment in the molecule is discretely polydispersed or monodispersed. The multifunctional polyethylene glycol is flexible and diverse in terms of branch structures and the lengths of branching arms, has various parameters and performance indicators that are adjustable and easy to control, and has a broad applicability.

A rubber composition based at least on a reinforcing filler comprising a content of silica of greater than or equal to 80 phr and on an elastomer matrix comprising a content of a modified diene elastomer of greater than or equal to 75 phr is provided. The modified diene elastomer includes macromolecules comprising, within their structure, a linear or branched polyether block comprising, at each of the two ends of the block, a branch point to which up to three diene elastomer branches and up to three —OR groups are bonded, R representing, independently of one another, a C.sub.1-C.sub.8 alkyl substituent or a hydrogen atom

b—the. The copolymer is composed: of at least 20% of branched macromolecules comprising a polyether block to which at least three diene elastomer blocks are bonded, of at most 80% of linear macromolecules, and
d—each of the branch points includes a silicon atom.

A rubber composition based at least on a reinforcing filler comprising a content of silica of greater than or equal to 80 phr and on an elastomer matrix comprising a content of a modified diene elastomer of greater than or equal to 75 phr is provided. The modified diene elastomer includes macromolecules comprising, within their structure, a linear or branched polyether block comprising, at each of the two ends of the block, a branch point to which up to three diene elastomer branches and up to three —OR groups are bonded, R representing, independently of one another, a C.sub.1-C.sub.8 alkyl substituent or a hydrogen atom

b—the. The copolymer is composed: of at least 20% of branched macromolecules comprising a polyether block to which at least three diene elastomer blocks are bonded, of at most 80% of linear macromolecules, and
d—each of the branch points includes a silicon atom.

The present invention provides an aqueous pigment dispersion liquid being such that a pigment is finely dispersed, and the viscosity, and the particle diameters of the pigment are unlikely to fluctuate, being excellent in storage stability, and enabling preparation of an emulsion-polymerized toner having properly controlled particle diameters while improving the pigment utilization rate. The aqueous pigment dispersion liquid is an aqueous pigment dispersion liquid for an emulsion-polymerized toner containing a pigment, a dispersant, and an aqueous medium. The dispersant is a polymer containing a constitutional unit (A) derived from a monomer (A) such that a group containing a (meth)acryloyloxy group or the like is bonded to one end of a particular polyethylene glycol chain or the like, and a constitutional unit (B) derived from a monomer (B) having a carboxy group or the like, the polymer has a number average molecular weight in terms of polystyrene of 4,000 to 15,000, as measured by gel permeation chromatography, the polymer is contained in a state of being not ionized substantially, and the aqueous pigment dispersion liquid has a pH of 3.0 to 8.4.

The present invention provides an aqueous pigment dispersion liquid being such that a pigment is finely dispersed, and the viscosity, and the particle diameters of the pigment are unlikely to fluctuate, being excellent in storage stability, and enabling preparation of an emulsion-polymerized toner having properly controlled particle diameters while improving the pigment utilization rate. The aqueous pigment dispersion liquid is an aqueous pigment dispersion liquid for an emulsion-polymerized toner containing a pigment, a dispersant, and an aqueous medium. The dispersant is a polymer containing a constitutional unit (A) derived from a monomer (A) such that a group containing a (meth)acryloyloxy group or the like is bonded to one end of a particular polyethylene glycol chain or the like, and a constitutional unit (B) derived from a monomer (B) having a carboxy group or the like, the polymer has a number average molecular weight in terms of polystyrene of 4,000 to 15,000, as measured by gel permeation chromatography, the polymer is contained in a state of being not ionized substantially, and the aqueous pigment dispersion liquid has a pH of 3.0 to 8.4.

The monofunctional branched poly(ethylene glycol) (PEG) has a general formula shown in formula (1), and the bio-related substance modified by the monofunctional branched PEG has a general formula shown in formula (2), wherein X.sub.1 and X.sub.2 are each independently a hydrocarbon group having 1 to 20 carbon atoms, n.sub.1 and n.sub.2 are each independently an integer selected from 1 to 1000, n.sub.3 is an integer selected from 11 to 1000, L.sub.1, L.sub.2 are each independently a linking group, p is 0 or 1, q is 0 or 1, R.sub.1 is a hydrogen atom or a hydrocarbon group having 1 to 20 carbon atoms, D is a bio-related substance, Z is a linking group, and Z can react with the bio-related substance to form a residue group L.sub.3. The PEG-modified bio-related substance maintains good biological activity, and has better solubility and a longer half-life in vivo.

##STR00001##

The monofunctional branched poly(ethylene glycol) (PEG) has a general formula shown in formula (1), and the bio-related substance modified by the monofunctional branched PEG has a general formula shown in formula (2), wherein X.sub.1 and X.sub.2 are each independently a hydrocarbon group having 1 to 20 carbon atoms, n.sub.1 and n.sub.2 are each independently an integer selected from 1 to 1000, n.sub.3 is an integer selected from 11 to 1000, L.sub.1, L.sub.2 are each independently a linking group, p is 0 or 1, q is 0 or 1, R.sub.1 is a hydrogen atom or a hydrocarbon group having 1 to 20 carbon atoms, D is a bio-related substance, Z is a linking group, and Z can react with the bio-related substance to form a residue group L.sub.3. The PEG-modified bio-related substance maintains good biological activity, and has better solubility and a longer half-life in vivo.

##STR00001##

A multi-component crosslinkable composition includes at least one component (K1) and one component (K2). Component (K1) contains organosilicon compounds (A1) selected from compounds (A1a) of formula (Ia), the formula (Ia) being Y.sup.1—[B.sup.1—CR.sup.2.sub.2—SiR.sub.a(OR.sup.1).sub.3-a].sub.x, and compounds (A1b) of formula (Ib), the formula (Ib) being Y.sup.2—[B.sup.2—(CR.sup.4.sub.2).sub.b—Si(OR.sup.3).sub.3].sub.y. Component (K2), based in each case on 100 parts by weight of compounds (A1) in component (K1), includes at least 0.05 parts by weight of water and 10 to 1000 parts by weight of a component (A2) selected from compounds (A2a) of formula (IIa), the formula (IIa) being Y.sup.3—B.sup.3—CR.sup.7.sub.2—SiR.sup.5.sub.c(OR.sup.6).sub.3-c, and compounds (A2b) of formula (IIb), the formula (IIb) being Y.sup.4—[B.sup.4—(CR.sup.10.sub.2).sub.e—SiR.sup.8.sub.d(OR.sup.9).sub.3-d].sub.z.

A multi-component crosslinkable composition includes at least one component (K1) and one component (K2). Component (K1) contains organosilicon compounds (A1) selected from compounds (A1a) of formula (Ia), the formula (Ia) being Y.sup.1—[B.sup.1—CR.sup.2.sub.2—SiR.sub.a(OR.sup.1).sub.3-a].sub.x, and compounds (A1b) of formula (Ib), the formula (Ib) being Y.sup.2—[B.sup.2—(CR.sup.4.sub.2).sub.b—Si(OR.sup.3).sub.3].sub.y. Component (K2), based in each case on 100 parts by weight of compounds (A1) in component (K1), includes at least 0.05 parts by weight of water and 10 to 1000 parts by weight of a component (A2) selected from compounds (A2a) of formula (IIa), the formula (IIa) being Y.sup.3—B.sup.3—CR.sup.7.sub.2—SiR.sup.5.sub.c(OR.sup.6).sub.3-c, and compounds (A2b) of formula (IIb), the formula (IIb) being Y.sup.4—[B.sup.4—(CR.sup.10.sub.2).sub.e—SiR.sup.8.sub.d(OR.sup.9).sub.3-d].sub.z.