US3969431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforcement of vinyl chloride resins with suspension emulsion interpolymers
Assignee: Stauffer Chemical Co
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Filing: 1973-11-13
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Granted: 1976-07-13
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Expires: 1993-11-13
Abstract
Abstract Rigid vinyl chloride polymers are reinforced by admixture with a plurality of elastomer-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 butyl acrylate/2-ethylhexyl acrylate acrylic elastomer having a Tg of less than about 25 DEG C. The resulting reinforced vinyl chloride polymers display excellent physical properties.
Inventors
- 👤 Ruth E. Gallagher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:47
CPC Classifications
C; C08; C08F; C08F265/00; C08F265/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
97 words
A composition comprising an intimate admixture of: a. a rigid polymer of vinyl chloride; and b. interpolymer particles which consist essentially of (i) an emulsion acrylate copolymer of 50 to 70% butyl acrylate and 50% to 30% 2-ethylhexyl acrylate which has been crosslinked by from about 0.2% to 10%, by weight of said acrylates, of a monomer containing at least two ethylenically unsaturated groups and (ii) a vinyl chloride polymer which has been suspension polymerized in the presence of said acrylate copolymer and which surrounds and/or is homogeneously dispersed within the mass of said crosslinked acrylate copolymer.
Claim 2
Dependent Claim
97 words
A composition comprising an intimate admixture of: a. a rigid polymer of vinyl chloride; and b. interpolymer particles which consist essentially of (i) an emulsion acrylate copolymer of 50 to 70% butyl acrylate and 50% to 30% 2-ethylhexyl acrylate which has been crosslinked by from about 0.2% to 10%, by weight of said acrylates, of a monomer containing at least two ethylenically unsaturated groups and (ii) a vinyl chloride polymer which has been suspension polymerized in the presence of said acrylate copolymer and which surrounds and/or is homogeneously dispersed within the mass of said crosslinked acrylate copolymer.
Claim 3
Dependent Claim
21 words
The composition of claim 1, wherein said crosslinked acrylic elastomer emulsion polymer comprises from about 2 to 80%, by weight, thereof.
Claim 4
Dependent Claim
44 words
The composition of claim 1, wherein the acrylic elastomer emulsion polymer is crosslinked with a polyfunctional ethylenically unsaturated monomer selected from the group consisting of 1,3-butylene glycol diacrylate, 1,3-butylene glycol dimethacrylate, ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, triethylene glycol dimethacrylate and trimethylol propane trimethacrylate.
Claim 5
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 6
Dependent Claim
14 words
The composition of claim 4, wherein said vinyl chloride suspension polymer is polyvinyl chloride.
Claim 7
Dependent Claim
15 words
The composition of claim 1, wherein said rigid polymer of vinyl chloride is polyvinyl chloride.
Claim 8
Dependent Claim
81 words
Interpolymer particles which consist essentially of (i) an emulsion acrylate copolymer of 50 to 70% butyl acrylate and 50% to 30% 2-ethylhexyl acrylate which has been cross-linked by from about 0.2% to 10%, by weight of said acrylates, of a monomer containing at least two ethylenically unsaturated groups and (ii) a vinyl chloride polymer which has been suspension polymerized in the presence of said acrylate copolymer and which surrounds and/or is homogeneously dispersed within the mass of said crosslinked acrylate copolymer.
Claim 9
Dependent Claim
81 words
Interpolymer particles which consist essentially of (i) an emulsion acrylate copolymer of 50 to 70% butyl acrylate and 50% to 30% 2-ethylhexyl acrylate which has been cross-linked by from about 0.2% to 10%, by weight of said acrylates, of a monomer containing at least two ethylenically unsaturated groups and (ii) a vinyl chloride polymer which has been suspension polymerized in the presence of said acrylate copolymer and which surrounds and/or is homogeneously dispersed within the mass of said crosslinked acrylate copolymer.
Claim 10
Dependent Claim
14 words
The composition of claim 7 wherein the copolymer is crosslinked with 1,3-butylene glycol diacrylate.
Claim 11
Dependent Claim
24 words
The composition of claim 7 wherein the n-butyl acrylate and 2-ethylhexyl acrylate are in a ratio of 70 to 30 on a weight basis.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |