Patent US1315235A 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 02:46
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.
References Cited (Backward Citations)
US3745196A
Cited
US3649337A
Cited
US3652722A
Cited
US3660371A
Cited
US3699185A
Cited
US3701679A
Cited
US3719523A
Cited
US3833683A
Cited
US3787522A
Cited
US4022748A
Cited
US4034013A
Cited
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 |