Patent BE513459A successfully refreshed from Google Patents.
Patent EP0301361A2 successfully refreshed from Google Patents.
EP0301361A2
Expired / Lapsed
EP
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Rubber-modified cyanate ester resins, their preparation and polytriazines derived therefrom
Assignee: Dow Chemical Co
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Filing: 1988-07-19
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Granted: —
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Expires: 2008-07-19
Abstract
Abstract Polytriazines exhibiting improved toughness without sacrificing heat resistance are prepared by curing a cyanate ester resin having dispersed therein resin-insoluble rubber particles grafted with a resin-soluble polymer. The resin-soluble polymer stabilizes the rubber particles and maintains the particles in an essentially discrete, nonagglomerated form
Inventors
- 👤 Philip C. Yang
- 👤 Dale M. Pickelman
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 08:34
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/0622; C08G73/0638; C08G73/065; C08G73/0655; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/63; C08L; C08L79/00; C08L79/04; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/0353; H05K1/0373
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
119 words
A method of preparing a rubber-modified cyanate ester resin, comprising the steps of: a) emulsifying at least one emulsion polymerizable monomer in an aqueous colloidal dispersion of discrete resin-insoluble rubber particles maintained in a reasonably stable state with a surfactant or emulsifier, b) polymerizing the resulting emulsion to form a stable colloidal dispersion of resin-insoluble rubber particles wherein essentially every rubber particle is grafted with one or more resin-soluble polymer molecules resulting from the polymerization such that substantially all of the rubber particles are maintained in a discrete spaced apart relationship to each other by the resin-soluble polymer, and (c) mixing the grafted rubber particles with the cyanate ester resin to a degree sufficient to achieve a homogeneous dispersion.
Claim 2
Independent Claim
119 words
A method of preparing a rubber-modified cyanate ester resin, comprising the steps of: a) emulsifying at least one emulsion polymerizable monomer in an aqueous colloidal dispersion of discrete resin-insoluble rubber particles maintained in a reasonably stable state with a surfactant or emulsifier, b) polymerizing the resulting emulsion to form a stable colloidal dispersion of resin-insoluble rubber particles wherein essentially every rubber particle is grafted with one or more resin-soluble polymer molecules resulting from the polymerization such that substantially all of the rubber particles are maintained in a discrete spaced apart relationship to each other by the resin-soluble polymer, and (c) mixing the grafted rubber particles with the cyanate ester resin to a degree sufficient to achieve a homogeneous dispersion.
Claim 3
Dependent Claim
29 words
The method of Claim 1 further comprising the step of curing the homogeneous dispersion of the grafted rubber particles and the cyanate ester resin thereby forming a rubber-modified polytriazine.
Claim 4
Dependent Claim
17 words
The method of Claim 1 wherein the cyanate ester resin is a difunctional or polyfunctional aromatic polycyanate.
Claim 5
Dependent Claim
18 words
4 The method of Claim 1 wherein the rubber particles have diameters of 300 Å to 20,0000 Å.
Claim 6
Dependent Claim
40 words
The method of Claim 1 wherein the rubber particles are selected from the group consisting of a polyalkylene and a polymer from an alkyl ester of an α,β-ethylenically unsaturated monomer wherein the alkyl group has at least 4 carbon atoms.
Claim 7
Dependent Claim
72 words
The method of Claim 1 wherein the emulsion polymerizable monomer is selected from the group consisting of a vinyl aromatic monomer, an α,β-ethylenically unsaturated acid, an alkyl ester of an α,β-ethylenically unsaturated acid wherein the alkyl group has less than 4 carbon atoms, a hydroxyalkyl ester of an α,β-ethylenically unsaturated acid, an unsaturated nitrile, an epoxy functional monomer, an unsaturated ester of an α,β-ethylenically unsaturated acid; and any mixture of the above.
Claim 8
Dependent Claim
32 words
The method of Claim 1 wherein the amount of grafted rubber particles dispersed into the cyanate ester resin ranges from 0.1 to 30 percent of the weight of the cyanate ester resin.
Claim 9
Dependent Claim
62 words
A rubber-modified cyanate ester resin, comprising: (a) a resin continuous phase, and (b) a discontinuous phase of a stable colloidal dispersion of resin-insoluble rubber particles wherein essentially every rubber particle is grafted with one or more resin-soluble polymer molecules such that substantially all of the rubber particles are maintained in a discrete spaced apart relationship to each other by the resin-soluble polymer.
Claim 10
Dependent Claim
62 words
A rubber-modified cyanate ester resin, comprising: (a) a resin continuous phase, and (b) a discontinuous phase of a stable colloidal dispersion of resin-insoluble rubber particles wherein essentially every rubber particle is grafted with one or more resin-soluble polymer molecules such that substantially all of the rubber particles are maintained in a discrete spaced apart relationship to each other by the resin-soluble polymer.
Claim 11
Dependent Claim
17 words
The composition of Claim 8 wherein the cyanate ester resin is a difunctional or polyfunctional aromatic polycyanate.
Claim 12
Dependent Claim
19 words
The composition of Claim 8 wherein the rubber particles have diameters of about 300 Å to about 20,0000 Å.
Claim 13
Dependent Claim
40 words
The composition of Claim 8 wherein the rubber particles are selected from the group consisting of a polyalkylene and a polymer from an alkyl ester of an α,β-ethylenically unsaturated monomer wherein the alkyl group has at least 4 carbon atoms.
Claim 14
Dependent Claim
77 words
The composition of Claim 8 wherein the resin-soluble polymer is prepared from an emulsion polymerizable monomer selected from the group consisting of a vinyl aromatic monomer, an α,β-ethylenically unsaturated acid, an alkyl ester of an α,β-ethylenically unsaturated acid wherein the alkyl group has less than 4 carbon atoms, a hydroxyalkyl ester of an α,β-ethylenically unsaturated acid, an unsaturated nitrile, an epoxy functional monomer, an unsaturated ester of an α,β-ethylenically unsaturated acid; and any mixture of the above.
Claim 15
Dependent Claim
32 words
The composition of Claim 8 wherein the amount of grafted rubber particles dispersed into the cyanate ester resin ranges from 0.1 to 30 percent of the weight of the cyanate ester resin.
Claim 16
Dependent Claim
65 words
A rubber-modified polytriazine of a cyanate ester resin, comprising: (a) a polytriazine continuous phase, and (b) a discontinuous phase of a stable colloidal dispersion of resin-insoluble rubber particles wherein essentially every rubber particle is grafted with one or more resin-soluble polymer molecules such that substantially all of the rubber particles are maintained in a discrete spaced apart relationship to each other by the resin-soluble polymer.
Claim 17
Dependent Claim
65 words
A rubber-modified polytriazine of a cyanate ester resin, comprising: (a) a polytriazine continuous phase, and (b) a discontinuous phase of a stable colloidal dispersion of resin-insoluble rubber particles wherein essentially every rubber particle is grafted with one or more resin-soluble polymer molecules such that substantially all of the rubber particles are maintained in a discrete spaced apart relationship to each other by the resin-soluble polymer.
Claim 18
Dependent Claim
25 words
The composition of Claim 14 wherein the polytriazine is a copolymer of the cyanate ester resin and a monomer having at least one cyanate-reactive functionality.
Claim 19
Dependent Claim
17 words
The composition of Claim 15 wherein the cyanate ester resin is a difunctional or polyfunctional aromatic polycyanate
Claim 20
Dependent Claim
19 words
The composition of Claim 14 wherein the rubber particles have diameters of about 300 Å to about 20,0000 Å.
Claim 21
Dependent Claim
40 words
The composition of Claim 14 wherein the rubber particles are selected from the group consisting of a polyalkylene and a polymer from an alkyl ester of an α,β-ethylenically unsaturated monomer wherein the alkyl group has at least 4 carbon atoms.
Claim 22
Dependent Claim
77 words
The composition of Claim 14 wherein the resin-soluble polymer is prepared from an emulsion polymerizable monomer selected from the group consisting of a vinyl aromatic monomer, an α,β-ethylenically unsaturated acid, an alkyl ester of an α,β-ethylenically unsaturated acid wherein the alkyl group has less than 4 carbon atoms, a hydroxyalkyl ester of an α,β-ethylenically unsaturated acid, an unsaturated nitrile, an epoxy functional monomer, an unsaturated ester of an α,β-ethylenically unsaturated acid; and any mixture of the above.
Claim 23
Dependent Claim
32 words
The composition of Claim 14 wherein the amount of grafted rubber particles dispersed into the cyanate ester resin ranges from 0.1 to 30 percent of the weight of the cyanate ester resin.
References Cited (Backward Citations)
No citation records indexed.
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