Patent US4440908A successfully refreshed from Google Patents.
US4440908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Finely divided ionomer coated thermoplastic resin
Assignee: Millennium Petrochemicals Inc
•
Filing: 1981-09-08
•
Granted: 1984-04-03
•
Expires: 2001-09-08
Abstract
Abstract Powders of thermoplastic resins such as polyethylene homopolymer and ethylene-vinyl acetate copolymer are obtained by agitating molten resin in admixture with water and in the presence of a dispersing amount of a substantially water insoluble ionomer polymer.
Inventors
- 👤 Dorothee M. McClain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:59
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/12; C08J3/16; Y; Y10; Y10S; Y10S525/00; Y10S525/902; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
111 words
A dry powder of finely dispersed thermoplastic resin comprising resins selected from homopolymers and copolymers of olefins wherein the individual resin particles are substantially coated uniformly with a substantially water-insoluble ionomer, the ionomer including at least about 50 mol percent of an ethylenically unsaturated alpha-olefin of about 2 to about 10 carbon atoms, from about 0.2 to about 50 mol percent of an alpha, beta ethylenically unsaturated carboxylic acid having from about 3 to about 8 carbon atoms, with at least 10% of the acid groups being neutralized, said individual resin particles having diameters greater than about 10 microns and being present in the form of a finely divided dry powder.
Claim 2
Dependent Claim
111 words
A dry powder of finely dispersed thermoplastic resin comprising resins selected from homopolymers and copolymers of olefins wherein the individual resin particles are substantially coated uniformly with a substantially water-insoluble ionomer, the ionomer including at least about 50 mol percent of an ethylenically unsaturated alpha-olefin of about 2 to about 10 carbon atoms, from about 0.2 to about 50 mol percent of an alpha, beta ethylenically unsaturated carboxylic acid having from about 3 to about 8 carbon atoms, with at least 10% of the acid groups being neutralized, said individual resin particles having diameters greater than about 10 microns and being present in the form of a finely divided dry powder.
Claim 3
Dependent Claim
23 words
The thermoplastic resin of claim 1 wherein the individual particles have diameters less than about 800 microns and greater than about 10 microns.
Claim 4
Dependent Claim
88 words
The thermoplastic resin of claim 1 wherein the ionomer polymer is made by salt-forming with metal ions at least 10% of the acid groups of a copolymer of units derived from an alpha-olefin of the formula RCH═CH 2 wherein R is H or alkyl having from 1-8 carbon atoms and from 1.0 to 25 mole percent of units derived from an alpha, beta-ethylenically unsaturated carboxylic acid selected from the group consisting of alpha, beta-ethylenically unsaturated carboxylic acids consisting of acrylic acid, methacrylic acid, maleic acid and, fumaric acid.
Claim 5
Dependent Claim
11 words
The thermoplastic resin of claim 3 wherein said alpha-olefin is ethylene.
Claim 6
Dependent Claim
16 words
The thermoplastic resin of claim 3 wherein said alpha, beta-ethylenically unsaturated carboxylic acid is methacrylic acid.
Claim 7
Dependent Claim
22 words
The thermoplastic resin of claim 1 wherein the homopolymer is selected from the group consisting of polyethylene, polypropylene, polybutene, polyisobutylene and poly(4-methylpentene).
Claim 8
Dependent Claim
13 words
The thermoplastic resin of claim 6 wherein the homopolymer is polyethylene or polypropylene.
Claim 9
Dependent Claim
29 words
The thermoplastic resin of claim 1 wherein the copolymer is selected from the group consisting of ethylene-vinyl acetate, ethylene-vinyl propionate, ethylene-vinyl isobutyrate, ethylene-vinyl alcohol, ethylene-methyl acrylate, and ethylene-ethyl methacrylate.
Claim 10
Dependent Claim
12 words
The thermoplastic resin of claim 8 wherein the copolymer is ethylene-vinyl acetate.
Claim 11
Dependent Claim
24 words
The thermoplastic resin of claim 9 wherein said ethylene-vinyl acetate copolymer comprises between about 25 to 50 weight percent of said copolymer of ethylene.
Claim 12
Dependent Claim
44 words
Impact modifier powders suitable for dry blending into rigid polyvinyl chloride powder formulations in accordance with claim 1 wherein said modifier powders comprise from about ten to about twenty parts by weight of ionomer resin per one hundred parts by weight ethylene-vinyl acetate copolymer.
Claim 13
Dependent Claim
89 words
The thermoplastic resin of claim 11 wherein the ionomer polymer is made by salt forming with metal ions at least 10% of the acid groups of a copolymer of units derived from an alpha-olefin of the formula RCH═CH 2 wherein R is H or alkyl having from 1-8 carbon atoms and from 1.0 to 25 mole percent of units derived from an alpha, beta-ethylenically unsaturated carboxylic acid selected from the group consisting of alpha, beta-ethylenically unsaturated carboxylic acids consisting of acrylic acid, methacrylic acid, maleic acid and, fumaric acid.
Claim 14
Dependent Claim
11 words
The thermoplastic resin of claim 12 wherein said alpha-olefin is ethylene.
Claim 15
Dependent Claim
16 words
The thermoplastic resin of claim 12 wherein said alpha, beta-ethylenically unsaturated carboxylic acid is methacrylic acid.
Claim 16
Dependent Claim
18 words
The thermoplastic resin of claim 1 wherein the copolymer is selected from the group consisting of olefin-allyl copolymers.
Claim 17
Dependent Claim
25 words
The thermoplastic resin of claim 15 wherein said olefin-allyl copolymer is selected from the group consisting of ethylene-allyl alcohol, ethylene-allyl acetate, ethylene-allyl ether and ethylene-acrolein.
References Cited (Backward Citations)
US3365520A
Cited
US3347957A
Cited
US3437718A
Cited
US3628993A
Cited
US4174335A
Cited
US4280923A
Cited
US4258001A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-03 | 1987-10-03 | 1988-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-03 | 1991-10-03 | 1992-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-03 | 1995-10-03 | 1996-04-03 | $7700.00 | Window Closed / Lapsed |