Patent US3988393A successfully refreshed from Google Patents.
US3988393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rigid plastic admixed with crosslinked acrylate/vinyl chloride interpolymer
Assignee: Stauffer Chemical Co
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Filing: 1975-07-25
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Granted: 1976-10-26
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Expires: 1995-07-25
Abstract
Abstract Certain rigid plastics are reinforced by admixture with a plurality of rubber-containing interpolymer particles which are prepared by the suspension polymerization of vinyl chloride in the presence of an aqueous emulsion of particles comprising a crosslinked acrylic rubber having a Tg of less than about 25 DEG C. The resulting reinforced plastics display excellent physical properties.
Inventors
- 👤 Ruth E. Gallagher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:03
CPC Classifications
C; C08; C08L; C08L25/00; C08L25/02; C08F; C08F265/00; C08F265/04; C08L51/00; C08L51/04; C08L51/06; C08L55/00; C08L55/02; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L33/00; C08L33/04; C08L33/06; C08L33/08; C08L51/003
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
73 words
An impact resistant composition comprising an intimate admixture of a styrene-containing rigid plastic having a modulus of elasticity of greater than 7,000 kgf/cm 2 at 23° C. and 50% relative humidity and rubber-containing interpolymer particles consisting essentially of a crosslinked aromatic acrylic emulsion polymer having a glass transition temperature less than about 25° C. and a vinyl chloride suspension polymer surrounding and/or homogeneously dispersed within the mass of said crosslinked acrylic emulsion polymer.
Claim 2
Dependent Claim
73 words
An impact resistant composition comprising an intimate admixture of a styrene-containing rigid plastic having a modulus of elasticity of greater than 7,000 kgf/cm 2 at 23° C. and 50% relative humidity and rubber-containing interpolymer particles consisting essentially of a crosslinked aromatic acrylic emulsion polymer having a glass transition temperature less than about 25° C. and a vinyl chloride suspension polymer surrounding and/or homogeneously dispersed within the mass of said crosslinked acrylic emulsion polymer.
Claim 3
Dependent Claim
15 words
The composition of claim 1 wherein the acrylic emulsion polymer is a crosslinked poly(benzyl acrylate).
Claim 4
Dependent Claim
21 words
The composition of claim 1 wherein the acrylic emulsion polymer is a poly(benzyl acrylate) crosslinked by a polyfunctional ethylenically unsaturated monomer.
Claim 5
Dependent Claim
25 words
The composition of claim 1, wherein said crosslinked acrylic rubber emulsion polymer of said particles comprises from about 2.0 to about 80% by weight, thereof.
Claim 6
Dependent Claim
31 words
The composition of claim 3, wherein said polyfunctional ethylenically unsaturated monomer is selected from the group consisting of 1,3-butylene dimethacrylate, ethylene glycol dimethacrylate, 1,3-butylene diacrylate, triethylene glycol dimethacrylate and trimethylolpropane trimethacrylate.
Claim 7
Dependent Claim
36 words
The composition of claim 1, wherein said vinyl chloride suspension polymer is selected from the group consisting of polyvinyl chloride and copolymers of vinyl chloride with a minor proportion of at least one other vinyl monomer.
Claim 8
Dependent Claim
14 words
The composition of claim 6, wherein said vinyl chloride suspension polymer is polyvinyl chloride.
Claim 9
Dependent Claim
13 words
The composition of claim 1, wherein said rigid plastic is an SAN polymer.
Claim 10
Dependent Claim
13 words
The composition of claim 1, wherein said rigid plastic is an ABS polymer.
Claim 11
Dependent Claim
13 words
The composition of claim 1, wherein said rigid plastic is an ASA polymer.
Claim 12
Dependent Claim
13 words
The composition of claim 1, wherein said rigid plastic is an MBS polymer.
Claim 13
Dependent Claim
42 words
The composition of claim 1, wherein said particles are present in a concentration such that said composition has a total acrylic rubber content derived from said particles of from about 0.05 to 30%, as based on the total weight of said composition.
References Cited (Backward Citations)
US3370105A
Cited
US3334156A
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US3657172A
Cited
US3660529A
Cited
US3821329A
Cited
US3657382A
Cited
US3929933A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-26 | 1980-04-26 | 1980-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-26 | 1984-04-26 | 1984-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-26 | 1988-04-26 | 1988-10-26 | $7700.00 | Window Closed / Lapsed |