Patent US4096202A successfully refreshed from Google Patents.
US4096202A
Expired / Lapsed
US
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Impact modified poly(alkylene terephthalates)
Assignee: Rohm and Haas Co
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Filing: 1976-06-09
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Granted: 1978-06-20
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Expires: 1996-06-09
Abstract
Abstract Compositions comprising a blend of poly(alkylene terephthalates) and an impact modifier which is a multi-phase composite interpolymer comprising a crosslinked acrylic first stage which also contains graftlinking monomer and a final rigid thermoplastic phase. Also claimed is the process for improving the impact strength of poly(alkylene terephthalates) comprising blending therewith the multi-phase composite interpolymer modifier defined above.
Inventors
- 👤 Sutton B. Farnham
- 👤 Theodore D. Goldman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:43
CPC Classifications
C; C08; C08F; C08F265/00; C08F265/04; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
172 words
A composition comprising a blend of about 99 to 60% by weight of a poly(C 1 -C 6 alkylene terephthalate) and about 1 to 40% by weight of a multi-phase composite interpolymer comprising: (A) about 25 to 95 weight percent of a first elastomeric phase polymerized from a monomer system comprising about 75 to 99.8% by weight C 1 to C 6 alkyl acrylate, 0.1 to 5% by weight crosslinking member, 0.1 to 5% by weight graftlinking monomer, said crosslinking monomer being a polyethylenically unsaturated monomer having a plurality of addition polymerizable reactive groups all of which polymerize at substantially the same rate of reaction, and said graftlinking monomer being a polyethylenically unsaturated monomer having a plurality of addition polymerizable reactive groups, at least one of which polymerizes at a substantially different rate of polymerization from at least one other of said reactive groups; and, (B) about 75 to 5 weight percent of a final, rigid thermoplastic phase polymerized in the presence of said elastomeric phase and is free of epoxy groups.
Claim 2
Dependent Claim
172 words
A composition comprising a blend of about 99 to 60% by weight of a poly(C 1 -C 6 alkylene terephthalate) and about 1 to 40% by weight of a multi-phase composite interpolymer comprising: (A) about 25 to 95 weight percent of a first elastomeric phase polymerized from a monomer system comprising about 75 to 99.8% by weight C 1 to C 6 alkyl acrylate, 0.1 to 5% by weight crosslinking member, 0.1 to 5% by weight graftlinking monomer, said crosslinking monomer being a polyethylenically unsaturated monomer having a plurality of addition polymerizable reactive groups all of which polymerize at substantially the same rate of reaction, and said graftlinking monomer being a polyethylenically unsaturated monomer having a plurality of addition polymerizable reactive groups, at least one of which polymerizes at a substantially different rate of polymerization from at least one other of said reactive groups; and, (B) about 75 to 5 weight percent of a final, rigid thermoplastic phase polymerized in the presence of said elastomeric phase and is free of epoxy groups.
Claim 3
Dependent Claim
15 words
The composition of claim 1 wherein said graftlinking monomer is allyl methacrylate or diallyl maleate.
Claim 4
Dependent Claim
12 words
The composition of claim 1 wherein the crosslinking monomer is butylene diacrylate.
Claim 5
Dependent Claim
17 words
The composition of claim 1 wherein the poly(C 1 to C 5 alkyl terephthalate) is poly(butylene terephthalate).
Claim 6
Dependent Claim
33 words
The composition of claim 1 wherein said final rigid thermoplastic phase is polymerized from a monomer system comprising about 50 to 100 weight percent of a C 1 to C 4 alkyl methacrylate.
Claim 7
Dependent Claim
20 words
The composition of claim 1 wherein said final phase monomer system is free of acid, hydroxyl, amino, and amide groups.
Claim 8
Dependent Claim
27 words
The composition of claim 1 wherein the multiphase composite interpolymer includes an intermediate phase polymerized from a monomer system comprising from 75 to 100% by weight styrene.
Claim 9
Dependent Claim
94 words
The composition of claim 1 wherein the poly(C 1 to C 6 alkylene terephthalate) is poly(butylene terephthalate), the interpolymer has only two stages, the first stage comprising about 60 to 95% by weight of said interpolymer and said first stage is polymerized from a monomer system comprising 95 to 99.8% by weight butyl acrylate, 0.1 to 2.5% by weight butylene diacrylate as a crosslinking agent, 0.1 to 2.5% by weight allyl methacrylate or diallyl maleate as a graftlinking agent, and said final stage is polymerized from about 60 to 100% by weight methyl methacrylate.
Claim 10
Dependent Claim
33 words
A process for improving the impact strength of poly(C 1 to C 6 alkylene terephthalate) comprising blending therewith about 1 to 40% by weight of the multi-phase composite interpolymer defined in claim 1.
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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) | 1981-06-19 | 1981-12-19 | 1982-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-19 | 1985-12-19 | 1986-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-19 | 1989-12-19 | 1990-06-20 | $7700.00 | Window Closed / Lapsed |