EP0242227A2
Expired / Lapsed
EP
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Elastomeric neutron protection material
Assignee: 3M Co
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Filing: 1987-04-16
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Granted: —
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Expires: 2007-04-16
Abstract
Abstract Elastomeric neutron protection material comprising a polymeric reaction product of a rection between a) at least one polybutadiene-based polyol having a hydrogen content comparable to that of polyethylene; and b) at least one aliphatic diisocyanate; the material having a hydrogen content of at least about 8 weight percent.
Inventors
- 👤 Winfried C/O Minnesota Mining And Knorr
- 👤 Guenther C/O Minnesota Mining And John
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 10:54
CPC Classifications
G; G21; G21F; G21F1/00; G21F1/02; G21F1/10
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
55 words
An elastomeric neutron protection material capable of decelerating fast neutrons, comprising an elastomeric polymeric reaction product of a reaction between: a) at least one polybutadiene-based polyol having a hydrogen content comparable to that of polyethylene; and b) at least one aliphatic diisocyanate; the product having a hydrogen content of at least about 8 weight percent.
Claim 2
Dependent Claim
55 words
An elastomeric neutron protection material capable of decelerating fast neutrons, comprising an elastomeric polymeric reaction product of a reaction between: a) at least one polybutadiene-based polyol having a hydrogen content comparable to that of polyethylene; and b) at least one aliphatic diisocyanate; the product having a hydrogen content of at least about 8 weight percent.
Claim 3
Dependent Claim
20 words
The protection material according to claim 1 wherein said hydrogen content is from about 10 to about 12.5 weight percent.
Claim 4
Dependent Claim
24 words
The protection material according to claim 1 wherein said material has a tensile strength of from about 11 to about 12.5 N/mm 2 .
Claim 5
Dependent Claim
22 words
The protection material according to claim 1 wherein said material has an elongation at break of from about 100 to about 800%.
Claim 6
Dependent Claim
23 words
The protection material according to claim 1 wherein said material has a tear strength of from about 3 to about 7 N/mm 2.
Claim 7
Dependent Claim
22 words
The protection material according to claim 1 wherein said material has a Shore A hardness of from about 60 to about 90.
Claim 8
Dependent Claim
17 words
The protection material according to claim 1 further including an absorber material capable of decelerating slow neutrons.
Claim 9
Dependent Claim
12 words
The protection material of claim 7 wherein said absorber material comprises boron.
Claim 10
Dependent Claim
20 words
The protection material of claim 1 further containing an absorption layer comprising an absorber material capable of decelerating slow neutrons.
Claim 11
Dependent Claim
12 words
The protection material of claim 9 wherein said absorber material comprises boron.
Claim 12
Dependent Claim
31 words
A process for preparing the protection material according to claim 1 comprising reacting said polyol and said isocyanate in the presence of a crosslinking agent to form a polymeric reaction product.
Claim 13
Dependent Claim
26 words
The process according to claim 11 wherein said crosslinking agent is trifunctional and selected from the group consisting of nitrilo tripropanol, triethanol amine, and nitro tributanol.
References Cited (Backward Citations)
No citation records indexed.
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