US 6,639,025 B2 · Elastomer-modified epoxy siloxane compositions

Abstract

Elastomer-modified Epoxy-polysiloxane compositions of this invention are prepared by combining a silicone intermediate, with an epoxy resin, an elastomeric resinous intermediate, a polyfunctional amine, an optional organometallic catalyst, and optional fillers, pigments, and processing agents. The composition is prepared using a sufficient amount of water to promote hydrolysis of the polysiloxane and the polycondensation of the silanols produced by such hydrolysis. In its cured form, the epoxy-polysiloxane composition exists as a uniformly dispersed arrangement of linear epoxy chain fragments that are cross-linked with a continuous polysiloxane polymer chain, wherein either or both of the epoxy and/or polysiloxane polymers are elastomer modified to provide coatings and floorings having significantly improved properties of impact resistance, flexibility, crack resistance, and abrasion resistance with compared to conventional epoxy systems.

Claims17

Dependent claims

An elastomer-modified epoxy siloxane composition prepared by combining:

water;
a silicone intermediate having the formula
where each R1 is selected from the group consisting of hydroxy, alkyl, aryl and alkoxy groups having up to six carbon atoms, each R2 is selected from the group consisting of hydrogen, alkyl, and aryl groups having up to six carbon atoms and, wherein n is selected so that the weight-average molecular weight for the polysiloxane is in the range of from about 400 to 10,000;
a polyfunctional amine curative agent;
an epoxy resin having at least two 1,2-epoxide groups;
and
an elastomeric resinous intermediate having a functionality selected from the group consisting of hydroxyl, epoxy, isocyanate, carboxyl, mercaptan, and amine.

4 more elements

An elastomer-modified epoxy siloxane composition prepared by combining:

a silicone intermediate selected from the group consisting of alkoxy and silanol-functional polysiloxanes having a weight-average molecular weight in the range of from about 400 to 10,000;
an aminosilane curative having the general formula
Y—Si—(O—X)3
where Y is H(HNR)a and where “a” is an integer in the range of from 1 to 6, R is a difunctional organic radical independently selected from the group consisting of aryl, alkyl, dialkylaryl, alkoxyalkyl, and cycloalkyl radicals, and where X is limited to alkyl, hydroxalkyl, alkoxyalkyl or hydroxyalkoxyalkyl groups containing less than about six carbon atoms;
an epoxy resin having at least two 1,2-epoxide groups;
and
an elastomeric resinous intermediate having a functionality selected from the group consisting of hydroxyl, epoxy, isocyanate, carboxyl, mercaptan, and amine, and being selected from the group consisting of epoxy resins, polybutene resins, polybutadiene resins, acrylonitrile resins, polysulfide resins, and combinations thereof.

4 more elements

An elastomer-modified epoxy siloxane composition prepared by combining:

water;
a silicone intermediate having the formula
where each R1 is selected from the group consisting of hydroxy, alkyl, aryl and alkoxy groups having up to six carbon atoms, each R2 is selected from the group consisting of hydrogen, alkyl, and aryl groups having up to six carbon atoms and, wherein n is selected so that the weight-average molecular weight for the polysiloxane is in the range of from about 400 to 10,000;
an aminosilane curative having the general formula
Y—Si—(O—X)3
where Y is H(HNR)a and where “a” is an integer in the range of from 1 to 6, R is a difunctional organic radical independently selected from the group consisting of aryl, alkyl, dialkylaryl, alkoxyalkyl, and cycloalkyl radicals, and where X is limited to alkyl, hydroxalkyl, alkoxyalkyl or hydroxyalkoxyalkyl groups containing less than about six carbon atoms;
an epoxy resin having more than one 1,2-epoxide groups per molecule with an epoxide equivalent weight in the range of from 100 to about 5,000;
and
an elastomeric resinous intermediate having a functionality selected from the group consisting of hydroxyl, epoxy, isocyanate, carboxyl, mercaptan, and amine, and being selected from the group consisting of epoxy resins, polybutene resins, polybutadiene resins, acrylonitrile resins, and combinations thereof.

6 more elements

Dependencies are inferred from the claim text.

Elastomer-modified epoxy siloxane compositions

Life of this patent

Elastomer-modified epoxy siloxane compositions

Life of this patent

Abstract

Claims17