EP0099717A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Conducting unsaturated polyester resin compositions
Assignee: BP PLC
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Filing: 1983-07-12
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Granted: —
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Expires: 2003-07-12
Abstract
Abstract The present invention relates to conducting unsaturated polyester resin compositions. Composition comprises an unsaturated polyester, a copolymerisable monomer and from 0.1% to 8% by weight of an electrically conducting grade of carbon black, uniformly dispersed throughout the composition by high shear mixing. The resin composition of the present invention can be converted to cured products having an electrical conductivity of at least 1 x 10- 8 reciprocal ohms per cm. The resins may be used to coat pipes which enables them to be electrically heated, if desired.
Inventors
- 👤 Russell Ian Crisp
- 👤 Sidney George Fogg
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 08:56
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/20; H01B1/24; C; C08; C08K; C08K3/00; C08K3/02; C08K3/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
39 words
An unsaturated polyester resin composition comprising an unsaturated polyester and a copolymerisable monomer, said composition containing from 0.1 to 8X by weight of an electrically conducting grade of carbon black uniformly dispersed throughout the composition by high shear mixing.
Claim 2
Dependent Claim
39 words
An unsaturated polyester resin composition comprising an unsaturated polyester and a copolymerisable monomer, said composition containing from 0.1 to 8X by weight of an electrically conducting grade of carbon black uniformly dispersed throughout the composition by high shear mixing.
Claim 3
Dependent Claim
36 words
An unsaturated polyester resin composition according to claim 1 wherein said composition contains from 0.5 to 5X by weight of an electrically conducting grade of carbon black uniformly dispersed throughout the composition by high shear mixing.
Claim 4
Dependent Claim
43 words
An unsaturated polyester resin composition according to claim 1 or 2 wherein the uniform dispersion of carbon black is carried out by high shear mixing at a shear rate of at least 1000 reciprocal seconds for a period of at least 1 minute.
Claim 5
Dependent Claim
89 words
40 An unsaturated polyester resin composition according to any one of claims 1 to 3 wherein the uniform dispersion of carbon black is carried out by firstly mixing carbon black with the resin composition in a low shear mixer, secondly homogenising the composition in a high shear mixer at a shear rate of at least 1000 reciprocal seconds for at least 1 minute, thirdly allowing the mixture to stand for a wetting period up to 24 hours and finally repeating the high shear mixing as in the second step.
Claim 6
Dependent Claim
23 words
An unsaturated polyester resin composition according to claim 4 wherein a vacuum is applied to the carbon black/resin mixture during the wetting step.
Claim 7
Dependent Claim
56 words
An unsaturated polyester resin composition according to any one of the preceding claims 1 to 3 wherein the carbon black is uniformly dispersed in the resin by first adding the carbon black to the copolymerisable monomer and then mixing the monomer containing the carbon black with the unsaturated polyester in a single high shear mixing operation.
Claim 8
Dependent Claim
49 words
An unsaturated polyester resin composition according to any one of the preceding claims wherein the unsaturated polyester component is a condensation product of a glycol and a mixture of an alpha, beta-unsaturated dibasic acid and a saturated dibasic acid optionally modified by a small amount of a polyhydric alcohol.
Claim 9
Dependent Claim
42 words
An unsaturated polyester resin composition according to claim 7 wherein the unsaturated polyester component is a condensation product of a glycol and a mixture of a dibasic acid selected from maleic acid and fumaric acid with phthalic acid optionally modified by pentaerythritol.
Claim 10
Dependent Claim
27 words
An unsaturated polyester resin composition according to any one of the preceding claims wherein the copolymerisable monomer component is selected from styrene, diallyl phthalate and methyl methacrylate.
Claim 11
Dependent Claim
30 words
Cured products having an electrical conductivity of at least 1 x 10- 6 reciprocal ohms/cm produced from an unsaturated polyester resin composition according to any one of the preceding claims.
References Cited (Backward Citations)
No citation records indexed.
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