US3997624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyethylene waxes
Assignee: Princeton Polymer Laboratories Inc
•
Filing: 1975-10-01
•
Granted: 1976-12-14
•
Expires: 1995-10-01
Abstract
Abstract Low molecular weight ethylene homo and copolymer waxes are prepared at pressures below 1000 psi and at temperatures below 120° C. using free radical catalysts having 10-hour half-lifes at not over 60° C.
Inventors
- 👤 Donald E. Hudgin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:58
CPC Classifications
C; C08; C08F; C08F210/00; C08F210/02; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/946
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
149 words
A process of preparing an ethylene polymer wax having a molecular weight of 1,000 to 10,000 consisting essentially of polymerizing a member of the group consisting of (1) ethylene and (2) a mixture of ethylene with a copolymerizable monomer selected from the group consisting of vinyl acetate, acrylic acid, methacrylic acid, maleic anhydride and a copolymerizable alpha monoolefin, said monomers being present in an amount to provide not over 50 mol % of the polymer units, in the presence of a free radical forming catalyst having a 10-hour half life at 30° to 60° C., said polymerization being carried out at a temperature of 20° to 120° C. and a pressure of 300 to 900 psi and in an inert or chain transfer solvent having a molecular weight of not over 200 and selected from the group consisting of hydrocarbons, ethers, carboxylic acid esters and ketones and mixtures thereof.
Claim 2
Dependent Claim
149 words
A process of preparing an ethylene polymer wax having a molecular weight of 1,000 to 10,000 consisting essentially of polymerizing a member of the group consisting of (1) ethylene and (2) a mixture of ethylene with a copolymerizable monomer selected from the group consisting of vinyl acetate, acrylic acid, methacrylic acid, maleic anhydride and a copolymerizable alpha monoolefin, said monomers being present in an amount to provide not over 50 mol % of the polymer units, in the presence of a free radical forming catalyst having a 10-hour half life at 30° to 60° C., said polymerization being carried out at a temperature of 20° to 120° C. and a pressure of 300 to 900 psi and in an inert or chain transfer solvent having a molecular weight of not over 200 and selected from the group consisting of hydrocarbons, ethers, carboxylic acid esters and ketones and mixtures thereof.
Claim 3
Dependent Claim
16 words
The process of claim 1 wherein the reaction is carried out at 40° to 120° C.
Claim 4
Dependent Claim
16 words
The process of claim 2 wherein the reaction is carried out at 40° to 70° C.
Claim 5
Dependent Claim
13 words
The process of claim 3 wherein the pressure is 600 to 900 psi.
Claim 6
Dependent Claim
12 words
The process of claim 1 wherein the catalyst is a peroxy catalyst.
Claim 7
Dependent Claim
24 words
The process of claim 5 wherein the solvent is selected from the group consisting of a hydrocarbon and a heterocyclic ether and mixtures thereof.
Claim 8
Dependent Claim
28 words
The process of claim 6 wherein the solvent is selected from the group consisting of hexane, benzene, propylene oxide, tetrahydrofuran, dioxolane and a mixture of hexane and tetrahydrofuran.
Claim 9
Dependent Claim
10 words
The process of claim 7 wherein the solvent is tetrahydrofuran.
Claim 10
Dependent Claim
10 words
The process of claim 8 wherein said member is ethylene.
Claim 11
Dependent Claim
13 words
The process of claim 9 wherein the temperature is 40° to 70° C.
Claim 12
Dependent Claim
13 words
The process of claim 10 wherein the pressure is 600 to 900 psi.
Claim 13
Dependent Claim
12 words
The process of claim 11 wherein the catalyst is t-butyl peroxy pivalate.
Claim 14
Dependent Claim
14 words
The process of claim 7 wherein the catalyst is dicyclohexylperoxydicarbonate or t-butyl peroxy pivalate.
Claim 15
Dependent Claim
10 words
The process of claim 1 wherein said member is ethylene.
Claim 16
Dependent Claim
22 words
The process of claim 14 wherein the solvent is a hydrocarbon or a cyclic ether and the catalyst is a peroxy catalyst.
Claim 17
Dependent Claim
13 words
The process of claim 15 wherein the temperature is 40° to 70° C.
Claim 18
Dependent Claim
17 words
The process of claim 1 wherein said member is a mixture of ethylene and said copolymerizable monomer.
Claim 19
Dependent Claim
22 words
The process of claim 17 wherein the solvent is a hydrocarbon or a cyclic ether and the catalyst is a peroxy catalyst.
Claim 20
Dependent Claim
13 words
A process of claim 18 wherein the temperature is 40° to 70° C.
Claim 21
Dependent Claim
39 words
The process of claim 1 wherein the solvent is an alkane, cycloalkane, aromatic hydrocarbon free of non-benzenoid unsaturation or a cyclic ether having 3 to 6 atoms in the ring of which 1 to 2 are ether oxygen atoms.
Claim 22
Dependent Claim
28 words
The process of claim 1 wherein (2) is a mixture of ethylene with (a) vinyl acetate, (b) acrylic acid, (c) methacrylic acid, (d) maleic anhydride or (e) propylene.
Claim 23
Dependent Claim
10 words
The process of claim 21 wherein said member is (2).
Claim 24
Dependent Claim
15 words
The process of claim 1 wherein the catalyst is a peroxy catalyst or azo catalyst.
Claim 25
Dependent Claim
12 words
The process of claim 23 wherein the catalyst is an azo catalyst.
Claim 26
Dependent Claim
10 words
The process of claim 24 wherein the catalyst is 2-6-butylazo-2-cyano-4-methoxy-4-methylpentane.
Claim 27
Dependent Claim
30 words
The process of claim 1 wherein the solvent is selected from the group consisting of a hydrocarbon, a heterocyclic ether, a ketone and a carboxylic acid ester and mixtures thereof.
Claim 28
Dependent Claim
31 words
The process of claim 26 wherein the solvent is selected from the group consisting of hexane, benzene, propylene oxide, tetrahydrofuran, dioxolane, acetone, ethyl acetate and a mixture of hexane and tetrahydrofuran.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-12-14 | 1980-06-14 | 1980-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-14 | 1984-06-14 | 1984-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-14 | 1988-06-14 | 1988-12-14 | $7700.00 | Window Closed / Lapsed |