US4613633A
Expired / Lapsed
US
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Copolymer latex
Assignee: Zeon Corp
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Filing: 1985-02-26
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Granted: 1986-09-23
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Expires: 2005-02-26
Abstract
Abstract A copolymer latex comprising heterogeneous polymer particles having a hard polymer domain and a soft polymer domain, characterized in that (a) the hard polymer domain is a polymer having a glass transition temperature of at least 60° C., (b) the soft polymer domain is a copolymer obtained by polymerizing in the presence of a latex of the hard polymer a monomeric composition composed of (i) 20 to 70% by weight of an aliphatic conjugated diene monomer, (ii) 20 to 60% by weight of a monovinylidene aromatic monomer, (iii) 0.5 to 10% by weight of an ethylenically unsaturated acid, (iv) 0 to 10% by weight of an ethylenically unsaturated amide, and (v) 0 to 30% by weight of a monomer copolymerizable with said monomers, (c) the proportion of the hard polymer domain is 55 to 90% by weight of the entire polymer particles, and (d) the proportion of the soft polymer domain is 45 to 10% by weight of the entire polymer particles.
Inventors
- 👤 Masayoshi Sekiya
- 👤 Koichi Harada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:59
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/56; D21H19/58; C; C08; C08F; C08F257/00; C08F257/02; D21H19/38; D21H19/42; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
165 words
A copolymer latex for paper coating comprising heterogeneous polymer particles having a hard polymer domain and a soft polymer domain, characterized in that (a) the hard polymer domain is a polymer having a glass transition temperature of at least 60° C., (b) the soft polymer domain is a copolymer obtained by polymerizing in the presence of a latex of the hard polymer a monomeric composition composed of (i) 20 to 70% by weight of an aliphatic conjugated diene monomer, (ii) 20 to 60% by weight of a monovinylidene aromatic monomer, (iii) 0.5 to 10% by weight of an ethylenically unsaturated acid, (iv) 0 to 10% by weight of an ethylenically unsaturated amide, and (v) 0 to 30% by weight of a monomer copolymerizable with said monomers, (c) the proportion of the hard polymer domain is 55 to 90% by weight of the entire polymer particles, and (d) the proportion of the soft polymer domain is 45 to 10% by weight of the entire polymer particles.
Claim 2
Dependent Claim
165 words
A copolymer latex for paper coating comprising heterogeneous polymer particles having a hard polymer domain and a soft polymer domain, characterized in that (a) the hard polymer domain is a polymer having a glass transition temperature of at least 60° C., (b) the soft polymer domain is a copolymer obtained by polymerizing in the presence of a latex of the hard polymer a monomeric composition composed of (i) 20 to 70% by weight of an aliphatic conjugated diene monomer, (ii) 20 to 60% by weight of a monovinylidene aromatic monomer, (iii) 0.5 to 10% by weight of an ethylenically unsaturated acid, (iv) 0 to 10% by weight of an ethylenically unsaturated amide, and (v) 0 to 30% by weight of a monomer copolymerizable with said monomers, (c) the proportion of the hard polymer domain is 55 to 90% by weight of the entire polymer particles, and (d) the proportion of the soft polymer domain is 45 to 10% by weight of the entire polymer particles.
Claim 3
Dependent Claim
35 words
The polymer latex of claim 1 wherein the heterogeneous polymer particles are composed of 55 to 80% by weight of the hard polymer domain and 55 to 70% by weight of the soft polymer domain.
Claim 4
Dependent Claim
81 words
The polymer latex of claim 1 wherein the soft polymer domain is a copolymer obtained by polymerizing a monomeric composition composed of (i) 25 to 65% by weight of the aliphatic conjugated diene monomer, (ii) 25 to 50% by weight of the monovinylidene aromatic monomer, (iii) 0.8 to 8% by weight of the ethylenically unsaturated acid, (iv) 2 to 7% by weight of the ethylenically unsaturated amide, and (v) 0 to 30% by weight of the monomer copolymerizable with said monomers.
Claim 5
Dependent Claim
14 words
A paper coating composition comprising the polymer latex of claim 1 and a pigment.
Claim 6
Dependent Claim
36 words
The paper coating composition of claim 4 wherein the amount of the polymer latex is 3 to 40% by weight as solids based on the total amount, as solids, of the polymer latex, pigment and binder.
Claim 7
Dependent Claim
11 words
The paper coating composition of claim 4 further comprising a binder.
Claim 8
Dependent Claim
35 words
The polymer latex of claim 1 wherein the heterogeneous polymer particles are core-shell polymer particles, wherein the core is comprised of the hard polymer domain and the shell is comprised of the soft polymer domain.
Claim 9
Dependent Claim
111 words
The polymer latex of claim 1 wherein monomer (b)(i) is 1,3-butadiene, 2-methyl-1,3-butadiene, 2,3-dimethyl-1,3-butadiene, or halogen-substituted butadiene; monomer (b)(ii) is styrene, alpha-methyl styrene, 4-methyl styrene, monochloro styrene or hydroxymethyl styrene; monomer (b)(iii) is acrylic acid, methacrylic acid, crotonic acid, cinnamic acid, itaconic acid, fumaric acid, maleic acid, maleic anhydride, monoethyl itaconate, monobutyl fumarate, monoethyl maleate, butyl hydroxypropyl maleate, 2-sulfoethyl acrylate, 2-sulfopropyl methacrylate, acrylamidopropanesulfonic acid, or styrenesulfonic acid; monomer (b)(iv) is acrylamide, methyacrylamide, N-methylolacrylamide or N-butoxymethylacrylamide; and monomer (b)(v) is methyl acrylate, ehtyl acrylate, methyl methacrylate, butyl acrylate, acrylonitrile, methacrylonitrile, beta-hydroxyethyl acrylate, glycidyl acrylate, glycidyl methacrylate, acrolein, allyl alcohol, divinylbenzene, diallyl phthalate diallyl maleate, triallyl cyanurate, ethylene glycol dimethacrylate, allyl acrylate of p-isopropenylstyrene.
Claim 10
Dependent Claim
20 words
The polymer latex of claim 1 wherein said polymer particles have an average particle diameter of 0.1 to 0.5 micron.
Claim 11
Dependent Claim
179 words
A coated paper adaptable to blister packaging and printing comprising a paper board substrate and a film of a paper coating composition coated thereon, said paper coating composition comprising heterogeneous polymer particles having a non-film forming hard polymer domain and a film-forming soft polymer domain, said polymer particles comprising from 55 to 90% by weight of the entire polymer particles of said hard particle domain comprised of a polymer having a glass transition temperature of at least 60° C., and from 45 to 10% by weight of the entire polymer particles of the soft polymer domain comprising a copolymer obtained by polymerizing a monomeric mixture in the presence of a latex of the hard polymer, said monomeric composition comprising (i) 20 to 70% by weight of an aliphatic conjugated diene monomer, (ii) 20 to 60% by weight of a monovinylidene aromatic monomer, (iii) 0.5 to 10% by weight of an ethylenically unsaturated acid, (iv) 0 to 10% by weight of an ethylenically unsaturated amide, and (v) 0 to 30% by weight of another monomer copolymerizable with said monomers (i)-(iv).
Claim 12
Dependent Claim
179 words
A coated paper adaptable to blister packaging and printing comprising a paper board substrate and a film of a paper coating composition coated thereon, said paper coating composition comprising heterogeneous polymer particles having a non-film forming hard polymer domain and a film-forming soft polymer domain, said polymer particles comprising from 55 to 90% by weight of the entire polymer particles of said hard particle domain comprised of a polymer having a glass transition temperature of at least 60° C., and from 45 to 10% by weight of the entire polymer particles of the soft polymer domain comprising a copolymer obtained by polymerizing a monomeric mixture in the presence of a latex of the hard polymer, said monomeric composition comprising (i) 20 to 70% by weight of an aliphatic conjugated diene monomer, (ii) 20 to 60% by weight of a monovinylidene aromatic monomer, (iii) 0.5 to 10% by weight of an ethylenically unsaturated acid, (iv) 0 to 10% by weight of an ethylenically unsaturated amide, and (v) 0 to 30% by weight of another monomer copolymerizable with said monomers (i)-(iv).
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