Toner resin composition and process for preparing same
First Claim
1. A toner resin composition comprising a uniform dispersion of 5 to 40% by weight of a linear polyester (A) having a weight average molecular weight of 3,000 to 20,000 and 50 to 95% by weight of a styrene-acrylic copolymer (B), wherein said styrene-acrylic copolymer (B) is comprised of 10 to 25% by weight of a high molecular weight polymer (B1) having a weight average molecular weight of 500,000 to 1,100,000 and 75 to 90% by weight of a low molecular weight polymer (B2) having a weight average molecular weight of 5,000 to 100,000, said high molecular weight polymer (B1) is comprised of a styrene component (b-1) and an acrylic ester and/or methacrylic ester component (b-2), and said low molecular weight polymer (B2) is comprised of a styrene component (b-1), an acrylic ester and/or methacrylic ester component (b-2), 0.3 to 3 parts by weight, per 100 parts of the total weight of said component (b-1) and component (b-2), of an α
- -methyl styrene dimer (b-3) and 0.5 to 30 parts by weight, per 100 parts by weight of said polyester (A), of a glycidyl methacrylate component (b-4).
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Accused Products
Abstract
A toner resin composition comprising 5 to 40% by weight of a polyester (A) having a weight average molecular weight of 3,000 to 20,000 and 50 to 95% by weight of a styrene-acrylic copolymer (B). The styrene-acrylic copolymer (B) is comprised of 10 to 25% by weight of a high molecular weight polymer (B1) having a weight average molecular weight of 500,000 to 1,100,000 and 75 to 90% by weight of a low molecular weight polymer (B2) having a weight average molecular weight of 5,000 to 100,000. The high molecular weight polymer (B1) is comprised of a styrene component (b-1) and an acrylic ester and/or methacrylic ester component (b-2). The low molecular weight polymer (B2) is comprised of a styrene component (b-1), an acrylic ester and/or methacrylic ester component (b-2), 0.3 to 3 parts by weight, per 100 parts of the total weight of said component (b-1) and component (b-2), of an α-methyl styrene dimer (b-3) and 0.5 to 30 parts by weight, per 100 parts by weight of said polyester (A), of a glycidyl methacrylate component (b-4).
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Citations
24 Claims
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1. A toner resin composition comprising a uniform dispersion of 5 to 40% by weight of a linear polyester (A) having a weight average molecular weight of 3,000 to 20,000 and 50 to 95% by weight of a styrene-acrylic copolymer (B), wherein said styrene-acrylic copolymer (B) is comprised of 10 to 25% by weight of a high molecular weight polymer (B1) having a weight average molecular weight of 500,000 to 1,100,000 and 75 to 90% by weight of a low molecular weight polymer (B2) having a weight average molecular weight of 5,000 to 100,000, said high molecular weight polymer (B1) is comprised of a styrene component (b-1) and an acrylic ester and/or methacrylic ester component (b-2), and said low molecular weight polymer (B2) is comprised of a styrene component (b-1), an acrylic ester and/or methacrylic ester component (b-2), 0.3 to 3 parts by weight, per 100 parts of the total weight of said component (b-1) and component (b-2), of an α
- -methyl styrene dimer (b-3) and 0.5 to 30 parts by weight, per 100 parts by weight of said polyester (A), of a glycidyl methacrylate component (b-4).
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A toner resin composition comprising a uniform dispersion of:
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5 to 40% by weight of a linear polyester (A) having a structure originating in a divalent carboxylic acid component (a-1), 0.2 to 0.7 mole, per mole of said divalent carboxylic acid, of an aromatic diol component (a-2) and 0.3 to 0.8 mole, per mole of said divalent carboxylic acid, of an aliphatic diol component (a-3) and having a weight average molecular weight of 3,000 to 20,000, an acid value of 0.5 to 10 mgKOH/g, a glass transition temperature of 40°
to 68°
C. and a softening temperature of 80°
to 160°
C.; and
,60to 95% by weight of a styrene-acrylic copolymer (B) formed by using a styrene component (b-1), an acrylic ester and/or methacrylic ester component (b-2), an α
-methyl styrene dimer (b-3) and a glycidyl methacrylate component (b-4) in amounts, per 100 parts of the total weight of said component (b-1) and component (b-2), of 50 to 90 parts by weight of said component (b-1), 10 to 50 parts by weight of said component (b-2) and 0.3 to 3 parts by weight of said dimer (b-3) and 0.5 to 30 parts by weight, per 100 parts by weight of said polyester (A), of said component (b-4);wherein said styrene-acrylic copolymer (B) is comprised of 10 to 25% by weight of a high molecular weight polymer (B1) having a weight average molecular weight of 500,000 to 1,100,000 and 75 to 90% by weight of a low molecular weight polymer having a weight average molecular weight of 5,000 to 100,000, and has a glass transition temperature of 40°
to 68°
C., a softening point of 100°
to 160°
C. and an acid value of 0.1 to 10 mgKOH/g.
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14. A process for preparing a toner resin composition comprising a linear polyester (A) a styrene-acrylic copolymer (B) wherein said styrene-acrylic copolymer (B) is comprised of 10 to 25% by weight of a high molecular weight polymer (B1) having a weight average molecular weight of 500,000 to 1,100,000 and 75 to 90% by weight of a low molecular weight polymer (B2) having a weight average molecular weight of 5,000 to 100,000, which process comprises of the steps of,
subjecting 10 to 25% by weight of a styrene component (b-1) and an acrylic ester and/or methacrylic ester component (b-2) to form an emulsion of a high molecular weight polymer (B1) having a weight average molecular weight of 500,000 to 1,100,000 to emulsion polymerization, and adding, to the obtained emulsion, 5 to 40% by weight of a polyester (A) having a weight average molecular weight of 3,000 to 20,000 and at least a styrene component (b-1), an acrylic ester and/or methacrylic ester component (b-2), 0.3 to 3 parts by weight, per 100 parts of the total weight of said component (b-1) and component (b-2), of an α - -methyl styrene dimer (b-3) and 0.5 to 30 parts by weight, per 100 parts by weight of said polyester (A), of a glycidyl methacrylate component (b-4), and subjecting the mixture to suspension polymerization.
- View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
Specification