EP0369345A2
Expired / Lapsed
EP
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Flame retardant polyorganosiloxane-based graft polymers
Assignee: General Electric Co
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Filing: 1989-11-10
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Granted: —
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Expires: 2009-11-10
Abstract
Abstract Thermoplastic resin compositions are blended with a novel silicone-based flame retardant which also imparts good impact resistance and low temperature ductility on the thermoplastic resins. Polyorganosiloxanes are grafted with vinyl-based polymers, such as bromostyrenes, capable of exhibiting flame retarding properties and then blended with normally flammable thermoplastic resins.
Inventors
- 👤 I-Chung Wayne Wang
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 09:15
CPC Classifications
C; C08; C08L; C08L51/00; C08L51/08; C08L51/085; C08F; C08F283/00; C08F283/12; C08F283/126; C08L101/00
Claims Analysis
Total Claims: 52
Claim 1
Independent Claim
110 words
A flame retardant composition comprising a multi-stage polyorganosiloxane-based graft polymer composition comprising: (a) as a first stage, (i) an organosiloxane polymer with units derived from a cross-linking agent or agents, and optionally units which serve as a graft linking agent or agents; or (ii) a polymeric co-homopolymerized substrate comprised of, in combination, an organosiloxane polymer and at least one vinyl-based polymer; or a mixture of (i) and (ii); and a functionally effective amount of (b) at least one subsequent stage or stages graft polymerized in the presence of any previous stages and which is comprised of a vinyl-based polymer, or a cross-linked vinyl-based polymer, capable of exhibiting flame retardant properties.
Claim 2
Dependent Claim
110 words
A flame retardant composition comprising a multi-stage polyorganosiloxane-based graft polymer composition comprising: (a) as a first stage, (i) an organosiloxane polymer with units derived from a cross-linking agent or agents, and optionally units which serve as a graft linking agent or agents; or (ii) a polymeric co-homopolymerized substrate comprised of, in combination, an organosiloxane polymer and at least one vinyl-based polymer; or a mixture of (i) and (ii); and a functionally effective amount of (b) at least one subsequent stage or stages graft polymerized in the presence of any previous stages and which is comprised of a vinyl-based polymer, or a cross-linked vinyl-based polymer, capable of exhibiting flame retardant properties.
Claim 3
Dependent Claim
26 words
A composition as defined in Claim 1 wherein said polymeric co-homopolymerized first stage substrate (a)(ii) contains units which are derived from a cross-linking agent or agents.
Claim 4
Dependent Claim
25 words
A composition as defined in Claim 1 wherein said polymeric co-homopolymerized first stage substrate (a)(ii) contains units which serve as a graft-linking agent or agents.
Claim 5
Dependent Claim
44 words
A composition as defined in Claim 1 wherein said polymeric co-homopolymerized first stage substrate (a)(ii) contains units which are derived from a crosslinking agent or agents and units of the same or different agent or agents which serve as a graft-linking agent or agents.
Claim 6
Dependent Claim
52 words
A composition as defined in any of Claims 1, 2, 3 or 4 wherein said organosiloxane/vinyl-based co-homopolymerized first stage substrate (a)(ii) comprises approximately 5 to 95 weight percent of the total graft copolymer composition based upon the weight of said first stage substrate and any subsequent graft stage or stages taken together.
Claim 7
Dependent Claim
26 words
A composition as defined in Claim 5 wherein said first stage substrate (a)(ii) comprises approximately 30 to 90 weight percent of the total graft polymer composition.
Claim 8
Dependent Claim
41 words
A composition as defined in any of Claims 1, 2, 3 or 4 wherein said first stage substrate (a)(ii) is comprised of approximately 3 to 97 weight percent of organosiloxane polymer and correspondingly 97 to 3 weight percent of vinyl-based polymer.
Claim 9
Dependent Claim
25 words
A composition as defined in Claim 7 wherein said first stage substrate (a)(ii) is comprised of approximately 5 to 45 weight percent of vinyl-based polymer.
Claim 10
Dependent Claim
52 words
A composition as defined in any of Claims 1, 2, 3 or 4 wherein said organosiloxane polymer is comprised primarily of units of the formula R n SiO (4-n)/2 wherein R is hydrogen or a monovalent hydrocarbon radical of about 1 to 16 carbon atoms and n is 0, 1 or 2.
Claim 11
Dependent Claim
37 words
A composition as defined in any of Claims 1, 2, 3 or 4 wherein the vinyl-based polymer component of said first stage substrate (a)(ii) is comprised primarily of alkenyl aromatic units, (meth)acrylate units or a mixture thereof.
Claim 12
Dependent Claim
14 words
A composition as defined in Claim 10 wherein said vinyl-based polymer component comprises polystyrene.
Claim 13
Dependent Claim
45 words
A composition as defined in any of Claims 1, 2, 3 or 4 wherein the vinyl-based polymer in any subsequent stage (b) comprises at least one selected from the group consisting of alkenyl aromatic compounds, (meth)acrylate compounds, vinyl cyanide compounds, maleimide compounds and acrylamide compounds.
Claim 14
Dependent Claim
25 words
A composition as defined in Claim 12 wherein said vinyl-based polymer comprises polymerized bromostyrene, dibromostyrene, chlorostyrene, dichlorostyrene, or a mixture of any of the foregoing.
Claim 15
Dependent Claim
30 words
A composition as defined in Claim 12 wherein said vinyl-based polymer comprises polymerized dibromostyrene or a mixture thereof with styrene, styrene and acrylonitrile, styrene and methyl methacrylate, or methyl methacrylate.
Claim 16
Dependent Claim
108 words
A composition as defined in any of Claims 1, 2, 3 or 4 wherein said subsequent stages comprise (b)(i) a second stage comprising at least one polymer, and optionally units derived from a cross-linking agent or agents, units which serve as a graft-linking agent or agents, units derived from a cross-linking agent or agents and units from the same agent or agents which serve as a graft-linking agent or agents or a mixture of any of the foregoing; and (b)(ii) a third stage comprising at least one vinyl-based polymer, or cross-linked vinyl-based polymer, capable of exhibiting flame retardant properties which is the same as, or different than (b)(i).
Claim 17
Dependent Claim
54 words
A composition as defined in Claim 15 wherein the ratio of first stage substrate polymer (a) to second stage polymer (b)(i) is 10:90 to 90:10 and the amount of third stage polymer (b)(ii) comprises from about 10 to about 90 parts by weight per 100 parts by weight of (a), (b)(i), and (b)(ii) combined.
Claim 18
Dependent Claim
25 words
A composition as defined in Claim 15 wherein subsequent stage (b)(i) comprises a cross-linked butyl acrylate polymer and subsequent stage (b)(ii) comprises a dibromostyrene/styrene/acrylonitrile terpolymer.
Claim 19
Dependent Claim
120 words
A composition comprising (A) A normally-flammable thermoplastic resin, and (B) an effective flame retarding amount of a multi-stage polyorganosiloxane-based graft polymer composition comprising: (a) as a first stage, (i) an organosiloxane polymer with units derived from a cross-linking agent or agents and optionally units which serve as a graft-linking agent or agents; or (ii) a polymeric co-homopolymerized substrate comprised of, in combination, an organosiloxane polymer and at least one vinyl-based polymer; or a mixture of (i) and (ii); and a functionally effective amount of (b) at least one subsequent stage or stages graft polymerized in the presence of any previous stages and which is comprised of a vinyl-based polymer or a cross-linked vinyl-based polymer capable of exhibiting flame retardant properties.
Claim 20
Dependent Claim
120 words
A composition comprising (A) A normally-flammable thermoplastic resin, and (B) an effective flame retarding amount of a multi-stage polyorganosiloxane-based graft polymer composition comprising: (a) as a first stage, (i) an organosiloxane polymer with units derived from a cross-linking agent or agents and optionally units which serve as a graft-linking agent or agents; or (ii) a polymeric co-homopolymerized substrate comprised of, in combination, an organosiloxane polymer and at least one vinyl-based polymer; or a mixture of (i) and (ii); and a functionally effective amount of (b) at least one subsequent stage or stages graft polymerized in the presence of any previous stages and which is comprised of a vinyl-based polymer or a cross-linked vinyl-based polymer capable of exhibiting flame retardant properties.
Claim 21
Dependent Claim
26 words
A composition as defined in Claim 18 wherein said polymeric co-homopolymerized first stage substrate (B)(a)(ii) contains units which are derived from a cross-linking agent or agents.
Claim 22
Dependent Claim
25 words
A composition as defined in Claim 18 wherein said polymeric co-homopolmerized first stage substrate (B)(a)(ii) contains units which serve as a graft-linking agent or agents.
Claim 23
Dependent Claim
44 words
A composition as defined in Claim 18 wherein said polymeric co-homopolymerized first stage substrate (B)(a)(ii) contains units which are derived from a cross-linking agent or agents and units of the same or different agent or agents which serve as a graft-linking agent or agents.
Claim 24
Dependent Claim
49 words
A composition as defined in any of Claims 18, 19, 20 or 21 wherein component (A) comprises from about 1 to about 99 parts by weight and component (B) comprises from about 99 to about 1 part by weight per 100 parts by weight of (A) and (B) together.
Claim 25
Dependent Claim
33 words
A composition as defined in Claim 22 wherein component (A) comprises from about 99 to about 30 parts by weight and component (B) comprises from about 1 to about 70 parts by weight.
Claim 26
Dependent Claim
64 words
A composition as defined in any of Claims 18, 19, 20 or 21 wherein said thermoplastic resin (A) comprises a polyvinylic resin, a polyester resin, a polyamide resin, a polycarbonate resin, a polyacetal resin, a polyether resin, a poly(etherester) resin, a poly(etherimide) resin, a poly(etherimide ester) resin, interpolymers comprising units of any of the foregoing resins and compositions comprising blends of any of them.
Claim 27
Dependent Claim
16 words
A composition as defined in Claim 24 wherein said thermoplastic resin (A) comprises a polycarbonate resin.
Claim 28
Dependent Claim
50 words
A composition as defined in any of Claims 18, 19, 20 or 21 wherein said first stage substrate (a)(i) or (a)(ii) comprises approximately from 3 to 97 weight percent of the total graft polymer composition based upon the weight of said first stage and any subsequent graft stages taken together.
Claim 29
Dependent Claim
28 words
A composition as defined in Claim 26 wherein said first stage substrate (a)(i) or (a)(ii) comprises approximately 30 to 90 weight percent of the total graft polymer composition.
Claim 30
Dependent Claim
42 words
A composition as defined in any of Claims 18, 19, 20 or 21 wherein said first stage substrate (a)(ii) is comprised of approximately 3 to 97 weight percent of organosiloxane polymer and correspondingly about 97 to 3 weight percent of vinyl-based polymer.
Claim 31
Dependent Claim
24 words
A composition as defined in Claim 28 wherein said first stage substrate (a)(ii) is comprised of approximately 5 to 45 weight percent vinyl-based polymer.
Claim 32
Dependent Claim
52 words
A composition as defined in any of Claims 18, 19, 20 or 21 wherein said organosiloxane polymer is comprised primarily of units of the formula R n SiO (4-n)/2 wherein R is hydrogen or a monovalent hydrocarbon radical of about 1 to 16 carbon atoms and n is 0, 1 or 2.
Claim 33
Dependent Claim
36 words
A composition as defined in any of Claims 18, 19, 20 or 21 wherein said vinyl-based polymer component of said first stage (a)(ii) is comprised primarily of alkenyl aromatic units, (meth)acrylate units or a mixture thereof.
Claim 34
Dependent Claim
14 words
A composition as defined in Claim 31 wherein said vinyl-based polymer component comprises polystyrene.
Claim 35
Dependent Claim
45 words
A composition as defined in any of Claims 18, 19, 20 or 21 wherein said vinyl-based polymer in any subsequent stage comprises at least one selected from the group consisting of polymerized alkenyl aromatic compounds, (meth)acrylate compounds, vinyl cyanide compounds, maleimide compounds and acrylamide compounds.
Claim 36
Dependent Claim
25 words
A composition as defined in Claim 33 wherein said vinyl-based polymer comprises polymerized bromostyrene, dibromostyrene, chlorostyrene, dichlorostyrene, or a mixture of any of the foregoing.
Claim 37
Dependent Claim
30 words
A composition as defined in Claim 34 wherein said vinyl polymer comprises polymerized dibromostyrene, or a mixture thereof with styrene, styrene and acrylonitrile, styrene and methyl methacrylate, or methyl methacrylate.
Claim 38
Dependent Claim
106 words
A composition as defined in any of Claims 18, 19, 20 or 21 wherein in component B said subsequent stages comprise (b)(i) a second stage comprising at least one said vinyl-based polymer and optionally units derived from at least one cross-linking agent or agents, units which serve as a graft-linking agent or agents, units derived from at least one cross-linking agent or agents and graft-linking agent or agents or a mixture of any of the foregoing; and (b)(ii) a third stage comprising at least one vinyl-based polymer, or cross-linked vinyl-based polymer, capable of exhibiting flame retardant properties, which is the same as, or different than (b)(i).
Claim 39
Dependent Claim
52 words
A composition as defined in Claim 36 wherein the ratio of substrate polymer (a) to second stage polymer (b)(i) is 10:90 to 90:10 and the amount of third stage polymer (b)(ii) comprises from about 10 to about 90 parts by weight per 100 parts by weight of (a), (b)(i), and (b)(ii) combined.
Claim 40
Dependent Claim
25 words
A composition as defined in Claim 36 wherein subsequent stage (b)(i) comprises a cross-linked butyl acrylate polymer and subsequent stage (b)(ii) comprises a dibromostyrene/styrene/acrylonitrile terpolymer.
Claim 41
Dependent Claim
24 words
A composition as defined in any of Claims 18, 19, 20 or 21 which also includes (C) an effective amount of a reinforcing filler.
Claim 42
Dependent Claim
19 words
40 A composition as defined in Claim 36 which also includes (C) an effective amount of a reinforcing filler.
Claim 43
Dependent Claim
31 words
A composition as defined in any of Claims 18, 19, 20 or 21 which also incudes (D) an effective amount of at least one flame retardant agent in addition to (B).
Claim 44
Dependent Claim
25 words
A composition as defined in Claim 36 which also includes (D) an effective amount of at least one flame retardant agent in addition to (B).
Claim 45
Dependent Claim
40 words
A composition as defined in any of Claims 18, 19, 20 or 21 which also include (C) and effective amount of a reinforcing filler; and (D) an effective amount of at least one flame retardant agent in addition to (B).
Claim 46
Dependent Claim
34 words
A composition as defined in Claim 36 which also includes (C) an effective amount of a reinforcing filler, and (D) an effective amount of at least one flame retardant agent in addition to (B).
Claim 47
Dependent Claim
17 words
An article molded from a composition as defined in any of Claims 18, 19, 20 or 21.
Claim 48
Dependent Claim
11 words
An article molded from a composition as defined in Claim 36.
Claim 49
Dependent Claim
17 words
An article extruded from a composition as defined in any of Claims 18, 19, 20 or 21.
Claim 50
Dependent Claim
11 words
An article extruded from a composition as defined in Claim 36.
Claim 51
Dependent Claim
17 words
An article thermoformed from a composition as defined in any of Claims 18, 19, 20 or 21.
Claim 52
Dependent Claim
11 words
An article thermoformed from a composition as defined in Claim 36.
References Cited (Backward Citations)
No citation records indexed.
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