US4481322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel reinforcing additive and method of reinforcing thermoplastic polymer therewith
Assignee: Union Carbide Corp
•
Filing: 1983-03-30
•
Granted: 1984-11-06
•
Expires: 2003-03-30
Abstract
Abstract Integrally blended additives, consisting of a ternary mixture of gamma methacryloxypropyl trimethoxysilane, trimethylolpropane triacrylate and a siloxaneoxyalkylene block copolymer, in the absence of dicumyl peroxide do not consistently improve the mechanical properties of mica filled polyolefins. This is especially true under "low shear" melt processing conditions e.g. employing a conventional screw design in a single barrel extruder. However, when the ternary mixture is combined with a small amount of dicumyl peroxide (neat or dissolved in vinyltrialkoxy silane) there is a consistent improvement in composite mechanical properties above that of the composites containing the ternary mixture alone and in comparison to mica filled polyolefin composites without any additive or composites containing the peroxide alone. Furthermore, thermal aging tensile strength retention is improved in mica filled polypropylene composites containing the ternary mixture combined with dicumyl peroxide.
Inventors
- 👤 Robert E. Godlewski
- 👤 Frederick D. Osterholtz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:52
CPC Classifications
C; C08; C08K; C08K13/00; C08K13/02; C08K5/00; C08K5/54
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
206 words
A method of reinforcing a thermoplastic organic polymer which comprises blending said thermoplastic organic polymer with a reinforcing filler mixture comprising of: (a) from 80 to 99 weight percent, based on the weight of the reinforcing filler mixture, of an inorganic filler; (b) from 0.05 to 15 weight percent, based on the weight of the reinforcing filler mixture, of a polymerizable unsaturated organic compound having at least two polymerizable unsaturation groups; (c) from 0.05 to 5 weight percent, based on the weight of the reinforcing filler mixture, of a vinyl-polymerizable unsaturated, hydrolyzable silane; (d) from 0.05 to 2.5 weight percent, based on the weight of the reinforcing filler mixture, of a surfactant comprising (i) a siloxane containing at least one silicon-bonded alkyl group having at least 12 carbon atoms; or (ii) a polyoxyalkylene compound having one or more polyoxyalkylene blocks each bonded at one end to a siloxane block, an alkyl group having at least 12 carbon atoms, or an alkenyl group, and bonded at the other end to an alkoxy group, siloxane block or a hydroxy group; and (e) from 0.0025 to 2.5 weight percent, based on the weight of the reinforcing filler mixture, of a free radical generator, to form a substantially homogeneous mixture.
Claim 2
Independent Claim
206 words
A method of reinforcing a thermoplastic organic polymer which comprises blending said thermoplastic organic polymer with a reinforcing filler mixture comprising of: (a) from 80 to 99 weight percent, based on the weight of the reinforcing filler mixture, of an inorganic filler; (b) from 0.05 to 15 weight percent, based on the weight of the reinforcing filler mixture, of a polymerizable unsaturated organic compound having at least two polymerizable unsaturation groups; (c) from 0.05 to 5 weight percent, based on the weight of the reinforcing filler mixture, of a vinyl-polymerizable unsaturated, hydrolyzable silane; (d) from 0.05 to 2.5 weight percent, based on the weight of the reinforcing filler mixture, of a surfactant comprising (i) a siloxane containing at least one silicon-bonded alkyl group having at least 12 carbon atoms; or (ii) a polyoxyalkylene compound having one or more polyoxyalkylene blocks each bonded at one end to a siloxane block, an alkyl group having at least 12 carbon atoms, or an alkenyl group, and bonded at the other end to an alkoxy group, siloxane block or a hydroxy group; and (e) from 0.0025 to 2.5 weight percent, based on the weight of the reinforcing filler mixture, of a free radical generator, to form a substantially homogeneous mixture.
Claim 3
Dependent Claim
26 words
The method of claim 1 wherein the reinforcing filler mixture is from about 5 to 85 percent by weight, based on the filled thermoplastic polymer blend.
Claim 4
Dependent Claim
12 words
The method of claim 1 wherein the reinforcing additives are integrally blended.
Claim 5
Dependent Claim
10 words
The method of claim 1 wherein the filler is mica.
Claim 6
Dependent Claim
48 words
The method of claim 1 wherein the polymerizable unsaturated organic compound having at least two polymerizable unsaturation groups is selected from the group consisting of the tri-, tetra-, and penta-acrylates of poly(vinyl alcohol), pentaerythritol, methylolpropane, and dipentaerythritol and the tri-, tetra-, and penta-methacrylates of pentaerythritol, methyolpropane and dipentaerythritol.
Claim 7
Dependent Claim
29 words
The method of claim 1 wherein the vinyl-polymerizable unsaturated, hydrolyzable silane is selected from the group consisting of gamma-methacryloxypropyltrimethoxysilane, vinyltriethoxysilane, vinyltri(2-methoxyethoxy) silane, vinyltrimethoxysilane, vinyltrichlorosilane, gamma-acryl-oxypropyltriethoxysilane, vinyltriacetoxysilane, ethynytriethoxysilane, and 2-propynyltrichlorosilane.
Claim 8
Dependent Claim
39 words
The method of claim 1 wherein the free radical generator is selected from the group consisting of dicumyl peroxide, lauroyl peroxide, azobisisobutyronitrile, benzoyl peroxide, tertiary butyl perbenzoate, di(tertiary-butyl) peroxide, cumene hydroperoxide, 2,5-dimethyl-2,5-di(t-butylperoxy)hexane, 2,5-dimethyl-2,5-di(t-butylperoxy)hexane, teritary butyl hydroperoxide, and isopropyl percarbonate.
Claim 9
Dependent Claim
22 words
The method of claim 1 wherein the thermoplastic organic polymer is in particulate solid form when blended with the reinforcing filler mixture.
Claim 10
Dependent Claim
21 words
The method of claim 1 wherein the thermoplastic organic polymer is in molten form when blended with the reinforcing filler mixture.
Claim 11
Dependent Claim
15 words
The method of claim 1 wherein the thermoplastic organic polymer is either polyethylene or polypropylene.
Claim 12
Dependent Claim
110 words
A reinforcing additive for use in a reinforcing inorganic filler mixture, said reinforcing additive comprising: (a) a polymerizable unsaturated organic compound having at least two polymerizable unsaturating groups; (b) a vinyl-polymerizable unsaturated, hydrolyzable silane; (c) a surfactant comprising (i) a siloxane containing at least one silicon-bonded alkyl group having at least 12 carbon atoms; or (ii) a polyoxyalkylene compound having one or more polyoxyalkylene bocks each bonded at one end to a siloxane block, an alkyl group having at least 12 carbon atoms, or an alkenyl group, and bonded at the other end to an alkoxy group, a siloxane block or a hydroxy group; and (d) a free radical generator.
Claim 13
Dependent Claim
110 words
A reinforcing additive for use in a reinforcing inorganic filler mixture, said reinforcing additive comprising: (a) a polymerizable unsaturated organic compound having at least two polymerizable unsaturating groups; (b) a vinyl-polymerizable unsaturated, hydrolyzable silane; (c) a surfactant comprising (i) a siloxane containing at least one silicon-bonded alkyl group having at least 12 carbon atoms; or (ii) a polyoxyalkylene compound having one or more polyoxyalkylene bocks each bonded at one end to a siloxane block, an alkyl group having at least 12 carbon atoms, or an alkenyl group, and bonded at the other end to an alkoxy group, a siloxane block or a hydroxy group; and (d) a free radical generator.
Claim 14
Dependent Claim
48 words
The additive of claim 11 wherein the polymerizable unsaturated organic compound having at least two polymerizable unsaturation groups is selected from the group consisting of the tri-, tetra-, and penta-acrylates of poly(vinyl alcohol), pentaerythritol, methylolpropane, and dipentaerythritol and the tri-, tetra-, and penta-methacrylates of pentaerythritol, methylolpropane and dipentaerythritol.
Claim 15
Dependent Claim
29 words
The additive of claim 11 wherein the vinyl-polymerizable unsaturated, hydrolyzable silane is selected from the group consisting of gamma-methacryloxypropyltrimethoxysilane, vinyltriethoxysilane, vinyltri(2-methoxyethoxy) silane, vinyltrimethoxysilane, vinyltrichlorosilane, gamma-acryl-oxypropyltriethoxysilane, vinyltriacetoxysilane, ethynytriethoxysilane, and 2-propynyltrichlorosilane.
Claim 16
Dependent Claim
39 words
The additive of claim 11 wherein the free radical generator is selected from the group consisting of dicumyl peroxide, lauroyl peroxide, azobisisobutyronitrile, benzoyl peroxide, tertiary butyl perbenzoate, di(tertiary-butyl) peroxide, cumene hydroperoxide, 2,5-dimethyl-2,5-di(t-butylperoxy)hexane, 2,5-dimethyl-2,5-di(t-butylperoxy)hexane, teritary butyl hydroperoxide, and isopropyl percarbonate.
Claim 17
Dependent Claim
20 words
A filled organic polymer composition comprising a thermoplastic organic polymer, an inorganic filler and the reinforcing additive of claim 11.
Claim 18
Dependent Claim
20 words
A filled organic polymer composition comprising a thermoplastic organic polymer, an inorganic filler, and the reinforcing additive of claim 12.
Claim 19
Dependent Claim
20 words
A filled organic polymer composition comprising a thermoplastic organic polymer, an inorganic filler, and the reinforcing additive of claim 13.
Claim 20
Dependent Claim
20 words
A filled organic polymer composition comprising a thermoplastic organic polymer, an inorganic filler, and the reinforcing additive of claim 14.
References Cited (Backward Citations)
US3471439A
Cited
US4317765A
Cited
US3773708A
Cited
US3969313A
Cited
US3868347A
Cited
US4129549A
Cited
US4069378A
Cited
US4104289A
Cited
US4188451A
Cited
US4172101A
Cited
US4287227A
Cited
US4333970A
Cited
US4385136A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-06 | 1988-05-07 | 1988-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-06 | 1992-05-07 | 1992-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-06 | 1996-05-07 | 1996-11-06 | $7700.00 | Window Closed / Lapsed |