Patent EP0256500A2 successfully refreshed from Google Patents.
EP0256500A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Emulsion polymers containing acrylonitrile or vinylidene chloride
Assignee: Akzo Nobel Paints LLC
•
Filing: 1987-08-11
•
Granted: —
•
Expires: 2007-08-11
Abstract
Abstract A two-stage emulsion process to produce a core/shell emulsion polymer comprising copolymerizing first stage monomers including acrylonitrile and/or vinylidene chloride to form a core and copolymerizing second stage monomers substantially free of acrylonitrile and/or vinylidene chloride to form a shell and a resulting core/shell polymer.
Inventors
- 👤 Phillips C. Martino
- 👤 Tai-Shih Maw
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 12:06
CPC Classifications
C; C08; C08F; C08F265/00; C08F265/08; C08F259/00; C08F259/02; C08F259/06; C09; C09D; C09D151/00; C09D151/003
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
105 words
An emulsion process for copolymerizing ethylenically unsaturated monomers, including acrylonitrile monomer or vinylidene monomer, comprising: copolymerizing said ethylenically unsaturated monomers in a two-stage process to produce a core/shell emulsion polymer, wherein first stage monomer includes acrylonitrile and/or vinylidene chloride and the last stage monomers are substantially free of acrylonitrile and/or vinylidene chloride, said core/shell emulsion polymer comprising on a weight basis between (i) 10% and 75% aromatic hydrocarbon monomer, (ii) 10% and 75% alkyl acrylate or methacrylate monomer, (iii) 1% and 20% carboxylic acid monomer, (iv) 1% and 25% functional monomer having hydroxyl amine, or amide functionality, and (v) the remaining being other ethylenic monomer.
Claim 2
Dependent Claim
105 words
An emulsion process for copolymerizing ethylenically unsaturated monomers, including acrylonitrile monomer or vinylidene monomer, comprising: copolymerizing said ethylenically unsaturated monomers in a two-stage process to produce a core/shell emulsion polymer, wherein first stage monomer includes acrylonitrile and/or vinylidene chloride and the last stage monomers are substantially free of acrylonitrile and/or vinylidene chloride, said core/shell emulsion polymer comprising on a weight basis between (i) 10% and 75% aromatic hydrocarbon monomer, (ii) 10% and 75% alkyl acrylate or methacrylate monomer, (iii) 1% and 20% carboxylic acid monomer, (iv) 1% and 25% functional monomer having hydroxyl amine, or amide functionality, and (v) the remaining being other ethylenic monomer.
Claim 3
Dependent Claim
13 words
A process according to claim 1, wherein the first stage monomers include acrylonitrile.
Claim 4
Dependent Claim
15 words
A process according to claim 1, wherein the first stage monomers include vinylidene chloride monomer.
Claim 5
Dependent Claim
20 words
A process according to claim 1, wherein the first stage monomers include a mixture of acrylonitrile and vinylidene chloride monomer.
Claim 6
Dependent Claim
19 words
A process according to claim 1, wherein the first stage monomers include alkyl acrylate monomer or alkyl methacrylate monomer.
Claim 7
Dependent Claim
15 words
A process according to claim 5, wherein the first stage monomers include vinyl aromatic monomer.
Claim 8
Dependent Claim
34 words
A process according to any one of the preceding claims, wherein the core of the core/shell emulsion polymer comprises between 10% and 90% by weight of the copolymerized monomers forming the core/shell emulsion polymer.
Claim 9
Dependent Claim
24 words
A process according to any one of the preceding claims, wherein the first stage monomer comprises from 10 to 40% acrylonitrile and/or vinylidene chloride.
Claim 10
Dependent Claim
18 words
A substrate coated with an emulsion polymer obtained by the process of any one of the preceding claims.
Claim 11
Dependent Claim
18 words
A can coated with an emulsion polymer obtained by the process of any one of the preceding claims.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.