US4690986A
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Impact-resistant thermoplastic polyorganosiloxane-based graft copolymer and process for producing same
Assignee: Shin-Etsu Chemical Co Ltd
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Filing: 1986-09-08
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Granted: 1987-09-01
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Expires: 2006-09-08
Abstract
Abstract A polyorganosiloxane-based high-impact thermoplastic graft copolymer superior in impact resistance, light resistance, surface gloss and color fastness produced by the emulsion graft polymerization of at least one vinyl monomer on an emulsion-polymerized polyorganosiloxane which consists of 90 to 99.8 mole % of an organosiloxane unit represented by the formula R'.sub.2 SiO.sub.2/2 (I) wherein R' is the same or different and denotes methyl, ethyl, propyl, or phenyl, 0.1 to 10 mole % of a unit derived from a graft-linking agent, said unit being represented by the formula ##STR1## wherein; R 2 denotes methyl, ethyl, propyl, or phenyl; n denotes a number of 0, 1, and 2; and p denotes a number of 1 to 6, and 0.1 to 10 mole % of a unit derived from a tetrafunctional silane crosslinking agent, said unit being represented by the formula SiO.sub.4/2 (III), said polyorganosiloxane showing a degree of swelling of 5 to 15 in toluene, and said graft copolymer containing said polyorganosiloxane in an amount of 10 to 70% by weight; and a process for producing the said graft copolymer.
Inventors
- 👤 Isao Sasaki
- 👤 Akira Yanagase
- 👤 Yasunori Kawachi
- 👤 Tetsuya Mayuzumi
- 👤 Toshio Oba
- 👤 Fumio Okada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:40
CPC Classifications
C; C08; C08F; C08F283/00; C08F283/12; C08F283/124; C09; C09D; C09D151/00; C09D151/08; C09D151/085
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
104 words
An impact-resistant, thermoplastic polyorganosiloxane-based graft copolymer produced by the emulsion graft polymerization of at least one vinyl monomer on an emulsion-polymerized polyorganosiloxane which consists of 90 to 99.8 mole % of an organosiloxane unit represented by the formula R'.sub.2 SiO.sub.2/2 (I) wherein R' is the same or different and denotes methyl, ethyl, propyl, or phenyl, 0.1 to 10 mole % of a unit derived from a graft-linking agent, said unit being represented by the formula ##STR4## wherein; R 2 denotes methyl, ethyl, propyl, or phenyl; n denotes a number of 0, 1, and 2; and p denotes a number of 1 to 6, and
Claim 2
Dependent Claim
104 words
An impact-resistant, thermoplastic polyorganosiloxane-based graft copolymer produced by the emulsion graft polymerization of at least one vinyl monomer on an emulsion-polymerized polyorganosiloxane which consists of 90 to 99.8 mole % of an organosiloxane unit represented by the formula R'.sub.2 SiO.sub.2/2 (I) wherein R' is the same or different and denotes methyl, ethyl, propyl, or phenyl, 0.1 to 10 mole % of a unit derived from a graft-linking agent, said unit being represented by the formula ##STR4## wherein; R 2 denotes methyl, ethyl, propyl, or phenyl; n denotes a number of 0, 1, and 2; and p denotes a number of 1 to 6, and
Claim 3
Dependent Claim
53 words
1 to 10 mole % of a unit derived from a tetrafunctional silane crosslinking agent, said unit being represented by the formula SiO.sub.4/2 (III), said polyorganosiloxane showing a degree of swelling of 5 to 15 in toluene, and said graft copolymer containing said polyorganosiloxane in an amount of 10 to 70% by weight.
Claim 4
Dependent Claim
53 words
1 to 10 mole % of a unit derived from a tetrafunctional silane crosslinking agent, said unit being represented by the formula SiO.sub.4/2 (III), said polyorganosiloxane showing a degree of swelling of 5 to 15 in toluene, and said graft copolymer containing said polyorganosiloxane in an amount of 10 to 70% by weight.
Claim 5
Dependent Claim
43 words
The impact-resistant, thermoplastic polyorganosiloxane-based graft copolymer of claim 1, wherein the unit derived from a graft-linking agent is represented by the formula ##STR5## wherein, p is a number of 2 to 4 and R 2 and n are as defined in claim 1.
Claim 6
Dependent Claim
38 words
The impact-resistant, thermoplastic polyorganosiloxane-based graft copolymer of claim 1, wherein the unit derived from a graft-linking agent is represented by the formula ##STR6## wherein, p is 3 and R 2 and n are as defined in claim 1.
Claim 7
Dependent Claim
23 words
The impact-resistant, thermoplastic polyorganosiloxane-based graft copolymer of claim 1, wherein the unit represented by the formula (III) is derived from tetramethoxysilane or tetraethoxysilane.
Claim 8
Dependent Claim
21 words
The impact-resistant, thermoplastic polyorganosiloxane-based graft copolymer of claim 1, wherein the unit represented by the formula (III) is derived from tetraethoxysilane.
Claim 9
Dependent Claim
22 words
The impact-resistant, thermoplastic polyorganosiloxane-based graft copolymer of claim 1 which contains the polyorganosiloxane in an amount of 20 to 60% by weight
Claim 10
Dependent Claim
31 words
The impact-resistant, thermoplastic polyorganosiloxane-based graft copolymer of claim 1, wherein the vinyl monomer is at least one member selected from the group consisting of aromatic alkenyl compounds and vinyl cyanide compounds.
Claim 11
Dependent Claim
22 words
The impact-resistant, thermoplastic polyorganosiloxane-based graft copolymer of claim 1, wherein the particle diameters of the polyorganosiloxane are from 0.05 to 1 μm.
Claim 12
Dependent Claim
22 words
The impact-resistant, thermoplastic polyorganosiloxane-based graft copolymer of claim 1, wherein the particle diameters of the polyorganosiloxane are from 0.08 to 0.5 μm.
Claim 13
Dependent Claim
197 words
A process for producing an impact-resistant, thermoplastic polyorganosiloxane-based graft copolymer, which comprises the steps of (A) emulsion copolymerization of (i) an organosiloxane compound capable of forming an organosiloxane unit represented by the formula R'.sub.2 SiO.sub.2/2 (I) wherein R' is the same or different and denotes methyl, ethyl, propyl, or phenyl, (ii) a graft-linking agent capable of forming a unit represented by the formula ##STR7## wherein, R 2 denotes methyl, ethyl, propyl or phenyl; n denotes a number of 0, 1, and 2; and p denotes a number of 1 to 6, and (iii) a tetrafunctional silane crosslinking agent capable of forming a unit represented by the formula SiO.sub.4/2 (III) to prepare a polyorganosiloxane which consists of 90 to 99.8 mole % of the unit of the formula (I), 0.1 to 10 mole % of the unit of the formula (II), and 0.1 to 10 mole % of the unit of the formula (III) and shows a degree of swelling of 5 to 15 in toluene, and (B) emulsion graft polymerization of at least one vinyl monomer on said polyorganosiloxane to produce the intended graft copolymer containing said polyorganosiloxane in an amount of 10 to 70% by weight.
Claim 14
Dependent Claim
197 words
A process for producing an impact-resistant, thermoplastic polyorganosiloxane-based graft copolymer, which comprises the steps of (A) emulsion copolymerization of (i) an organosiloxane compound capable of forming an organosiloxane unit represented by the formula R'.sub.2 SiO.sub.2/2 (I) wherein R' is the same or different and denotes methyl, ethyl, propyl, or phenyl, (ii) a graft-linking agent capable of forming a unit represented by the formula ##STR7## wherein, R 2 denotes methyl, ethyl, propyl or phenyl; n denotes a number of 0, 1, and 2; and p denotes a number of 1 to 6, and (iii) a tetrafunctional silane crosslinking agent capable of forming a unit represented by the formula SiO.sub.4/2 (III) to prepare a polyorganosiloxane which consists of 90 to 99.8 mole % of the unit of the formula (I), 0.1 to 10 mole % of the unit of the formula (II), and 0.1 to 10 mole % of the unit of the formula (III) and shows a degree of swelling of 5 to 15 in toluene, and (B) emulsion graft polymerization of at least one vinyl monomer on said polyorganosiloxane to produce the intended graft copolymer containing said polyorganosiloxane in an amount of 10 to 70% by weight.
Claim 15
Dependent Claim
49 words
The process for producing an impact-resistant, thermoplastic polyorganosiloxane-based graft copolymer according to claim 10 wherein the graft-linking agent is capable of forming a unit represented by the formula ##STR8## wherein, p is a number of 2 to 4 and R 2 and n are as defined in claim 10.
Claim 16
Dependent Claim
44 words
The process for producing an impact-resistant, thermoplastic polyorganosiloxane-based graft copolymer according to claim 10, wherein the graft-linking agent is capable of forming a unit represented by the formula ##STR9## wherein, p is 3 and R 2 and n are as defined in claim 10.
Claim 17
Dependent Claim
24 words
The process for producing an impact-resistant, thermoplastic polyorganosiloxane-based graft copolymer according to claim 10, wherein the tetrafunctional silane crosslinking agent is tetramethoxysilane or tetraethoxysilane.
Claim 18
Dependent Claim
22 words
The process for producing an impact-resistant, thermoplastic polyorganosiloxane-based graft copolymer according to claim 10, wherein the tetrafunctional silane crosslinking agent is tetraethoxysilane.
Claim 19
Dependent Claim
30 words
The process for producing an impact-resistant, thermoplastic polyorganosiloxane-based graft copolymer according to claim 10, wherein the polyorganosiloxane content in the graft copolymer is controlled to 20 to 60% by weight.
Claim 20
Dependent Claim
36 words
The process for producing an impact-resistant, thermoplastic polyorganosiloxane-based graft copolymer according to claim 10, wherein the vinyl monomer is at least one member selected from the group consisting of aromatic alkenyl compounds and vinyl cyanide compounds.
Claim 21
Dependent Claim
27 words
The process for producing an impact-resistant, thermoplastic polyorganosiloxane-based graft copolymer according to claim 10, wherein the particle diameters of the polyorganosiloxane are from 0.05 to 1 μm.
Claim 22
Dependent Claim
27 words
The process for producing an impact-resistant, thermoplastic polyorganosiloxane-based graft copolymer according to claim 10, wherein the particle diameters of the polyorganosiloxane are from 0.08 to 0.5 μm.
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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) | 1990-08-31 | 1991-03-02 | 1991-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-31 | 1995-03-02 | 1995-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-31 | 1999-03-02 | 1999-09-01 | $7700.00 | Window Closed / Lapsed |