Patent US3944631A successfully refreshed from Google Patents.
US3944631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylate-styrene-acrylonitrile composition and method of making the same
Assignee: General Electric Co
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Filing: 1974-02-01
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Granted: 1976-03-16
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Expires: 1994-02-01
Abstract
Abstract An impact-resistant and weatherable thermoplastic composition comprising from about 10 to about 50 weight percent of a crosslinked acrylate elastomer having a Tg of less than 25 DEG C., from about 5 to about 35 weight percent of a crosslinked styrene-acrylonitrile copolymer and from about 15 to about 85 weight percent of a non-crosslinked or linear styrene-acrylonitrile copolymer. The composition is made by a three-step sequence comprising emulsion polymerizing of an alkyl acrylate containing at least one crosslinking monomer, emulsion polymerizing a monomer mixture of styrene, acrylonitrile and at least one crosslinking monomer in the presence of the crosslinked acrylate elastomer formed in the previous step, or a reverse sequence of the prior two emulsion polymerization procedures, and, finally, emulsion or suspension polymerizing of styrene, acrylonitrile in the presence of the previously formed product.
Inventors
- 👤 Arthur J. Yu
- 👤 Ruth E. Gallagher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:42
CPC Classifications
C; C08; C08F; C08F285/00
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
167 words
A thermoplastic composition having impact and weather resistance which comprises a crosslinked acrylate elastomer, a crosslinked styrene-acrylonitrile copolymer and a linear styrene acrylonitrile copolymer said composition being formed by a process which comprises: 1. formation of a composition which comprises a crosslinked acrylate elastomer and a crosslinked styrene-acrylonitrile polymer by: a i. emulsion polymerization of at least one alkyl acrylate in the presence of at least one crosslinking agent and a ii. emulsion polymerization of styrene, acrylonitrile, and at least one crosslinking agent in the presence of the reaction product of 1 a i. or b i. emulsion polymerization of styrene and acrylonitrile in the presence of at least one crosslinking agent and b ii. emulsion polymerization of at least one alkyl acrylate and at least one crosslinking agent in the presence of the reaction product of 1 b i.; and 2. either suspension or emulsion polymerization of styrene and acrylonitrile in the absence of a crosslinking agent in the presence of the composition of Step 1.
Claim 2
Dependent Claim
167 words
A thermoplastic composition having impact and weather resistance which comprises a crosslinked acrylate elastomer, a crosslinked styrene-acrylonitrile copolymer and a linear styrene acrylonitrile copolymer said composition being formed by a process which comprises: 1. formation of a composition which comprises a crosslinked acrylate elastomer and a crosslinked styrene-acrylonitrile polymer by: a i. emulsion polymerization of at least one alkyl acrylate in the presence of at least one crosslinking agent and a ii. emulsion polymerization of styrene, acrylonitrile, and at least one crosslinking agent in the presence of the reaction product of 1 a i. or b i. emulsion polymerization of styrene and acrylonitrile in the presence of at least one crosslinking agent and b ii. emulsion polymerization of at least one alkyl acrylate and at least one crosslinking agent in the presence of the reaction product of 1 b i.; and 2. either suspension or emulsion polymerization of styrene and acrylonitrile in the absence of a crosslinking agent in the presence of the composition of Step 1.
Claim 3
Dependent Claim
28 words
A composition as claimed in claim 1 wherein the amount of crosslinked acrylate elastomer in the composition ranges from about 10% to 50% by weight of the composition.
Claim 4
Dependent Claim
19 words
A composition as claimed in claim 1 wherein the crosslinked acrylate elastomer has a Tg of less than 25°C.
Claim 5
Dependent Claim
35 words
A composition as claimed in claim 1 wherein the crosslinked acrylate elastomer is selected from the group consisting of the crosslinked C 2 -C 10 alkyl acrylates and crosslinked C 8 -C 22 alkyl methacrylates.
Claim 6
Dependent Claim
27 words
A composition as claimed in claim 1 wherein the crosslinked acrylate elastomer is selected from the group consisting of the crosslinked C 4 -C 8 alkyl acrylates.
Claim 7
Dependent Claim
16 words
A composition as claimed in claim 1 wherein the crosslinked acrylate elastomer is crosslinked n-butyl acrylate.
Claim 8
Dependent Claim
35 words
A composition as claimed in claim 1 which further comprises up to about 20% by weight of an ethylenically unsaturated compound copolymerized with the acrylate elastomer, said weight being based on the amount of acrylate.
Claim 9
Dependent Claim
27 words
A composition as claimed in claim 1 wherein the amount of crosslinked styrene-acrylonitrile in the composition range between about 5% and 35% by weight of the composition.
Claim 10
Dependent Claim
27 words
A composition as claimed in claim 1 wherein the amount of linear styrene-acrylonitrile ranges in the composition between about 15% to 85% by weight of the composition.
Claim 11
Dependent Claim
33 words
A composition as claimed in claim 1 wherein the weight ratio of styrene to acrylonitrile in the crosslinked and in the linear styrene-acrylonitrile components of the composition ranges between about 50:50 and 85:15.
Claim 12
Dependent Claim
41 words
A composition as claimed in claim 1 wherein either or both of the crosslinked styrene-acrylonitrile and the linear styrene-acrylonitrile are optionally copolymerized with 1-20% by weight of an ethylenically unsaturated monomer, said percentage being based on the weight of the styrene-acrylonitrile.
Claim 13
Dependent Claim
57 words
A composition as claimed in claim 1 wherein the amount of cross-linked acrylate ranges between about 10% and 50% by weight of the composition, the amount of crosslinked styrene-acrylonitrile ranges between about 5% and 35% by weight of the composition, and the amount of linear styrene-acrylonitrile ranges between about 15% and 85% by weight of the composition.
Claim 14
Dependent Claim
168 words
A process for the formation of a thermoplastic composition having impact and weather resistance which comprises a crosslinked acrylate elastomer, a crosslinked styreneacrylonitrile copolymer and a linear styrene-acrylonitrile, copolymer, said process comprising: 1. formation of a composition which comprises a crosslinked acrylate elastomer and a crosslinked styrene-acrylonitrile polymer by: a i. emulsion polymerization of at least one alkyl acrylate monomer in the presence of at least one crosslinking agent and a ii. emulsion polymerization of styrene, acrylonitrile, and at least one crosslinking agent in the presence of the reaction product of 1 a i.; or b i. emulsion polymerization of styrene and acrylonitrile, in the presence of at least one crosslinking agent and b ii. emulsion polymerization of at least one alkyl acrylate monomer and at least one crosslinking agent in the presence of the reaction product of 1 b i.; and 2. either emulsion or suspension polymerization of styrene and acrylonitrile in the absence of a crosslinking agent in the presence of the reaction product of (1).
Claim 15
Dependent Claim
168 words
A process for the formation of a thermoplastic composition having impact and weather resistance which comprises a crosslinked acrylate elastomer, a crosslinked styreneacrylonitrile copolymer and a linear styrene-acrylonitrile, copolymer, said process comprising: 1. formation of a composition which comprises a crosslinked acrylate elastomer and a crosslinked styrene-acrylonitrile polymer by: a i. emulsion polymerization of at least one alkyl acrylate monomer in the presence of at least one crosslinking agent and a ii. emulsion polymerization of styrene, acrylonitrile, and at least one crosslinking agent in the presence of the reaction product of 1 a i.; or b i. emulsion polymerization of styrene and acrylonitrile, in the presence of at least one crosslinking agent and b ii. emulsion polymerization of at least one alkyl acrylate monomer and at least one crosslinking agent in the presence of the reaction product of 1 b i.; and 2. either emulsion or suspension polymerization of styrene and acrylonitrile in the absence of a crosslinking agent in the presence of the reaction product of (1).
Claim 16
Dependent Claim
35 words
A process as claimed in claim 13 wherein the amount of acrylate monomer is sufficient to produce an amount of crosslinked acrylate elastomer which equals from about 10% to 50% by weight of the composition.
Claim 17
Dependent Claim
19 words
A process as claimed in claim 13 wherein the crosslinked acrylate elastomer has a Tg of less than 25°C.
Claim 18
Dependent Claim
32 words
A process as claimed in claim 13 wherein the acrylate monomer is selected from the group consisting of the C 2 -C 10 alkyl acrylates and C 8 -C 22 alkyl methacrylates.
Claim 19
Dependent Claim
25 words
A process as claimed in claim 13 wherein the acrylate monomer is selected from the group consisting of the C 4 -C 8 alkyl acrylates.
Claim 20
Dependent Claim
14 words
A process as claimed in claim 13 wherein the acrylate monomer is n-butyl acrylate.
Claim 21
Dependent Claim
26 words
A process as claimed in claim 13 wherein the acrylate monomer is optionally copolymerized with up to about 20% by weight of an ethylenically unsaturated monomer.
Claim 22
Dependent Claim
34 words
A process as claimed in claim 13 wherein the crosslinking agent used Step 1, is selected from the group consisting of the di- and poly-functional ethylenically unsaturated monomers having at least one vinyl group.
Claim 23
Dependent Claim
23 words
A process as claimed in claim 13 wherein the crosslinking agent in Steps 1 a i. or 1 b ii. is 1,3-butylene diacrylate.
Claim 24
Dependent Claim
40 words
A process as claimed in 13 wherein the amount of crosslinking agent in which is used in Step 1 ranges between 0.05% and 10% by weight of the combined amount of acrylate monomer and of the styrene and acrylonitrile monomers.
Claim 25
Dependent Claim
23 words
A process as claimed in claim 13 wherein the crosslinking agent in Steps 1 a ii. or 1 b i. is divinyl benzene.
Claim 26
Dependent Claim
37 words
A process as claimed in claim 13 wherein amount of styrene and acrylonitrile added in Step 1 is sufficient to produce an amount of crosslinked styrene-acrylonitrile which is equal to about 5-35% by weight of the composition.
Claim 27
Dependent Claim
38 words
A process as claimed in claim 13 wherein the amount of styrene and acrylonitrile added in Step 2 is sufficient to give an amount of linear styrene-acrylonitrile which ranges between 15% and 85% by weight of the composition.
Claim 28
Dependent Claim
31 words
A process as claimed in claim 13 wherein the weight ratio of styrene to acrylonitrile in Steps 1 and 2 ranges between 50:50 and 85:15 weight parts of styrene to acrylonitrile.
Claim 29
Dependent Claim
28 words
A process as claimed in claim 13 wherein the styrene-acrylonitrile formed in Steps 1 and 2 is optionally copolymerized with 1-20% by weight of an ethylenically unsaturated monomer.
Claim 30
Dependent Claim
85 words
A process as claimed in claim 13 wherein the amount of acrylate monomer used is sufficient to give 10%-50% by weight crosslinked acrylate elastomer in the composition, wherein the amount of styrene and acrylonitrile used in Step 1 is sufficient to give an amount of crosslinked styrene-acryloni-trile which is equal to about 5% to 35% by weight of the composition, and wherein the amount of styrene and acrylonitrile used in Step 2 is sufficient to give from 15% to 85% by weight of linear styrene-acrylonitrile.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |