US5407971A
Expired / Lapsed
US
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Radiation crosslinked elastomers
Assignee: 3M Co
•
Filing: 1994-01-26
•
Granted: 1995-04-18
•
Expires: 2014-01-26
Abstract
Abstract Disclosed are radiation-crosslinkable elastomeric compositions containing: (a) an elastomeric polymer containing abstractable hydrogen atoms in an amount sufficient to enable the elastomeric polymer to undergo crosslinking in the presence of a suitable radiation-activatable crosslinking agent; and (b) a radiation-activatable crosslinking agent of the formula: ##STR1## wherein: W represents --O--, --N--, or --S--; X represents CH 3 -- or ##STR2## Y represents a ketone, ester, or amide functionality; Z represents an organic spacer which does not contain hydrogen atoms that are more photoabstractable than hydrogen atoms of the elastomeric polymer; m represents an integer of 0 to 6; a represents 0 or 1; and n represents an integer of 2 or greater. Radiation-crosslinked elastomers are prepared by exposing the radiation-crosslinkable elastomeric compositions to radiation (e.g., UV light) to abstract hydrogen atoms from the elastomeric polymer by the resulting radiation-activated crosslinking agent.
Inventors
- 👤 Albert I. Everaerts
- 👤 Audrey A. Sherman
- 👤 Charles M. Leir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:42
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/07; C08F; C08F2/00; C08F2/46; C08F2/48; C08F2/50; C08F8/00; C08F8/28; C08F8/30; C08J; C08J3/00; C08J3/24; C08J5/00; C08J5/18; C08J7/00; C08J7/12; C08J7/16; C08J7/18; C08F2810/00; C08F2810/20; Y; Y10; Y10S; Y10S522/00; Y10S522/904; Y10S522/905
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
112 words
A radiation-crosslinkable composition consisting essentially of: (a) an elastomeric polymer containing abstractable hydrogen atoms in an amount sufficient to enable the elastomeric polymer to undergo crosslinking in the presence of a suitable radiation-activatable crosslinking agent; and (b) a radiation-activatable crosslinking agent of the formula: ##STR8## wherein: W represents --O--, or --N--; ##STR9## X represents CH 3 -- or ##STR10## Y represents ##STR11## with the proviso that when m=O, Y represents ##STR12## Z represents an organic spacer selected from the group consisting of aliphatic, aromatic, cycloaliphatic or urethane groups free of ethers, thiols, allylic groups, and tertiary amines; m represents an integer of 0 to 6; a represents 1; and n represents 2.
Claim 2
Dependent Claim
112 words
A radiation-crosslinkable composition consisting essentially of: (a) an elastomeric polymer containing abstractable hydrogen atoms in an amount sufficient to enable the elastomeric polymer to undergo crosslinking in the presence of a suitable radiation-activatable crosslinking agent; and (b) a radiation-activatable crosslinking agent of the formula: ##STR8## wherein: W represents --O--, or --N--; ##STR9## X represents CH 3 -- or ##STR10## Y represents ##STR11## with the proviso that when m=O, Y represents ##STR12## Z represents an organic spacer selected from the group consisting of aliphatic, aromatic, cycloaliphatic or urethane groups free of ethers, thiols, allylic groups, and tertiary amines; m represents an integer of 0 to 6; a represents 1; and n represents 2.
Claim 3
Dependent Claim
45 words
A radiation-crosslinkable composition according to claim 1 wherein the elastomeric polymer is a macromolecular material that returns rapidly to its approximate initial dimensions and shape after substantial deformation by a weak stress and subsequent release of that stress as measured according to ASTM D 1456-86.
Claim 4
Dependent Claim
26 words
The radiation-crosslinkable composition according to claim 1 wherein: X represents phenyl; W represents --O--; Y represents ##STR13## Z represents (CH 2 ) 2-10 ; and m=1.
Claim 5
Dependent Claim
39 words
The radiation-crosslinkable composition according to claim 1 wherein: X represents phenyl; W represents --O--; Z represents --CH 2 --CH 2 --O--C(O)--NH--R--NH--C(O)--O--CH 2 CH 2 --; R represents a divalent aliphatic, aromatic, or cycloaliphatic moiety; Y represents ##STR14## and m=1.
Claim 6
Dependent Claim
31 words
The radiation-crosslinkable composition according to claim 1 wherein said radiation-activatable crosslinking agent is present in an amount of from 0.01-25 weight percent, based upon the total weight of said radiation-crosslinkable composition.
Claim 7
Dependent Claim
31 words
The radiation-crosslinkable composition according to claim 1 wherein said radiation-activatable crosslinking agent is present in an amount of from 0.1-10 weight percent, based upon the total weight of said radiation-crosslinkable composition.
Claim 8
Dependent Claim
32 words
The radiation-crosslinkable composition according to claim 1 further containing additives selected from the group consisting of: thermally expandable polymeric microspheres; pigments; foaming agents; stabilizers; fire retardants; viscosity adjusting agents; tackifiers; and plasticizers.
Claim 9
Dependent Claim
35 words
A radiation-crosslinked composition prepared by the process of subjecting the radiation-crosslinkable composition of claim 1 to radiation in an amount sufficient to abstract hydrogen atoms from said elastomeric polymer by the resulting radiation-activated crosslinking agent.
Claim 10
Dependent Claim
14 words
A radiation-crosslinked elastomeric composition according to claim 8 wherein said radiation is electromagnetic radiation.
Claim 11
Dependent Claim
23 words
A radiation-crosslinked elastomeric composition according to claim 8 wherein said radiation has a wavelength in the range of about 280 to 400 nm.
Claim 12
Dependent Claim
15 words
The radiation-crosslinkable composition according to claim 1 wherein said radiation-activatable crosslinking agent is 1,4-butanedi(4-benzoylphenoxy) acetate.
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