US 2003/0118839 A1Published application

Composite material and method for preparation thereof

AssigneeDaicel-Degussa Ltd.

InventorsToru Ikuta, Hajime Komada, Mitsuteru Mutsuda

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Abstract

A composite of a resin member bonded to a vulcanized rubber member is obtained with using a rubber member vulcanized with a radical-generating agent (e.g., an organic peroxide) and a thermoplastic resin having at least 2 atoms, on average, selected from H and S atom per molecule, each atom having not less than 0.006 of an orbital interaction energy coefficient S represented by the following formula (1): S=(CHOMO,n)2/|Ec−EHOMO,n|+(CLUMO,n)2/|Ec−ELUMO,n| (1) wherein Ec: an orbital energy (eV) of a radical, CHOMO,n: a molecular-orbital coefficient of a highest occupied molecular orbital (HOMO) of an n-th H or S atom constituting a basic unit of the resin, EHOMO,n: an orbital energy (eV) of the HOMO, CLUMO,n: a molecular-orbital coefficient of a lowest unoccupied molecular orbital (LUMO) of the n-th H or S atom constituting the basic unit of the resin, ELUMO,n: an orbital energy (eV) of the LUMO, and above all represent a value calculated by a semiempirical molecular orbital method MOPACPM3. The thermoplastic resin includes a polyamide, a polyester, a PPE, a POM, a PPS, a polyolefinic resins, and the unvulcanized rubber may comprise a vulcanization-activating having plural polymerizable unsaturated bonds. The invention gives the composite of the resin bonded directly to the rubber firmly without adhesives in wide combinations of the resin and the rubber.

A composite comprising a vulcanized rubber member formed by a vulcanization of a non-silicone-series unvulcanized rubber, and a resin member comprising a thermoplastic resin and directly bonded to the rubber member, which comprises a combination of a rubber member vulcanized with a radical-generating agent and a resin member comprising a thermoplastic resin having at least 2 atoms, on average, selected from a hydrogen atom and a sulfur atom per molecule, and each atom has an orbital interaction energy coefficient S of not less than 0.006,

wherein the orbital interaction energy coefficient S is represented by the following formula (1):
S=(CHOMO,n)2/|Ec−EHOMO,n|+(CLUMO,n)2/|Ec−ELUMO,n| (1)
wherein each of Ec, CHOMO,n, EHOMO,n, CLUMO,n, and ELUMO,n represents a value calculated by a semiempirical molecular orbital method MOPACPM3, Ec representing an orbital energy (eV) of a radical of the radical-generating agent, CHOMO,n representing a molecular-orbital coefficient of a highest occupied molecular orbital (HOMO) of an n-th hydrogen or sulfur atom constituting a constitutive unit of the thermoplastic resin, EHOMO,n representing an orbital energy (eV) of the HOMO, CLUMO,n representing a molecular-orbital coefficient of a lowest unoccupied molecular orbital (LUMO) of the n-th hydrogen or sulfur atom constituting the constitutive unit of the thermoplastic resin, and ELUMO,n representing an orbital energy (eV) of the LUMO;
provided that said combination excludes the following combinations (1) to (3);
(1) a combination of an aliphatic polyamide-series resin having an amino group and an unvulcanized rubber having a carboxyl group or an acid anhydride group,
(2) a combination of an aliphatic polyamide-series resin and an unvulcanized rubber comprising a silane compound, and
(3) a combination of an epoxy group-containing resin and an unvulcanized rubber having a carboxyl group or an acid anhydride group;
and
provided that said combination includes the following cases (4) and (5):
(4) when the thermoplastic resin comprises a polyamide-series resin, an unvulcanized rubber comprises a polyfunctional vulcanization-activating agent, and
(5) when the thermoplastic resin comprises a polyphenylene ether-series resin, an unvulcanized rubber comprises a vulcanization-activating agent.

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Facts

Application

10/221,680Filed 13 Sep 2002

Priority

JP 006767/200115 Jan 2001

Published

26 Jun 2003

Term ends

Not estimatedThe source records don’t support an estimate.

Classification44 codes

B32B 27/20
Characterised by the use of special additives: using fillers, pigments, thixotroping agents
B32B 5/08
Characterised by structural features of a fibrous or filamentary layer: the fibres or filaments of a layer being of different substances , e.g.…
B32B 25/08
Comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material: of synthetic…
B32B 27/285
Comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42: comprising polyethers

Abstract

Claims21