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US 6,713,184 B1Granted
Adhesive and the utilization thereof in composite materials
AssigneeHenkel Kommanditgesellschaft auf Aktien
InventorsAndreas Ferencz, Eduard F. Taal, Heike Eisenberger, Herbert Fischer
Life of this patent
Estimating the term…
Abstract
An adhesive useful in forming composites includes components A and B. Component A includes at least one polyester with a molecular weight (Mn) of at least 8000 and has a total enthalpy of fusion of at most 20 mJ/mg. Component B includes at least one polyester with a molecular weight (Mn) of less than 8000 and a glass transition temperature of at most 60° C. The adhesive preferably has a melt viscosity of 500 to 25,000 mPas (Brookfield RVT DVII, 140° C., spindle 27) and a softening point of 70 to 100° C. (ASTM E28).
Claims17
An adhesive composition comprising component A having a total enthalpy of fusion of at most 20 mJ/mg and component B having a glass transition temperature of at most 60° C. wherein
- a) component A comprises at least one aromatic-containing polyester with a molecular weight (Mn) of at least 8000 consisting essentially of (i) a first acid selected from the group consisting of succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, maleic acid, fumaric acid, cyclohexane dicarboxylic acid, cyclohexene dicarboxylic acid, cyclohexadiene dicarboxylic acid, endomethylene hexahydrophthalic acid, cyclohexane tricarboxylic acid, phthalic acid, o-phthalic acid, isophthalic acid, terephthalic acid, trimellitic acid, anhydrides thereof, esters thereof with an alcohol containing from 1 to about 5 carbon atoms and combinations thereof;
- (ii) a second acid different from the first acid and selected from the group consisting of succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, maleic acid, fumaric acid, cyclohexane dicarboxylic acid, cyclohexene dicarboxylic acid, cyclohexadiene dicarboxylic acid, endomethylene hexahydrophthalic acid, cyclohexane tricarboxylic acid, phthalic acid, o-phthalic acid, isophthalic acid, terephthalic acid, trimellitic acid, anhydrides thereof, esters thereof with an alcohol containing from 1 to about 5 carbon atoms, and combinations thereof, and (iii) at least one alcohol, wherein at least one of the first acid or second acid is an aromatic-containing acid;
- and
- b) component B comprises at least one polyester with a molecular weight (Mn) of less than 8000 consisting essentially of (i) a first acid selected from the group consisting of succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, maleic acid, fumaric acid, cyclohexane dicarboxylic acid, cyclohexene dicarboxylic acid, cyclohexadiene dicarboxylic acid, endomethylene hexahydrophthalic acid, cyclohexane tricarboxylic acid, phthalic acid, o-phthalic acid, isophthalic acid, terephthalic acid, trimellitic acid, anhydrides thereof, esters thereof with an alcohol containing from 1 to about 5 carbon atoms and combinations thereof;
- (ii) a second acid different from the first acid and selected from the group consisting of succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, maleic acid, fumaric acid, cyclohexane dicarboxylic acid, cyclohexene dicarboxylic acid, cyclohexadiene dicarboxylic acid, endomethylene hexahydrophthalic acid, cyclohexane tricarboxylic acid, phthalic acid, o-phthalic acid, isophthalic acid, terephthalic acid, trimellitic acid, anhydrides thereof esters thereof with an alcohol containing from 1 to about 5 carbon atoms and combinations thereof;
- and (iii) at least one alcohol, the adhesive having a melt viscosity of 500 to 25,000 mPas (Brookfield RVT DVII, 140° C., spindle 27) and a softening point of 70 to 100° C. (ASTM E28).
3 more elements
A method of making a composite material comprising at least two substrates, the method comprising:
- providing an adhesive composition comprising component A having a total enthalpy of fusion of at most 20 mJ/mg and component B having a glass transition temperature of at most 60° C. wherein
- a) component A comprises at least one aromatic-containing polyester with a molecular weight (Mn) of at least 8000, and
- b) component B comprises at least one polyester with a molecular weight (Mn) of less than 8000, the adhesive having a melt viscosity of 500 to 25,000 mPas (Brookfield RVT DVII, 140° C., spindle 27) and a softening point of 70 to 100° C. (ASTM E28),
- applying the adhesive to at least part of a first substrate;
- and,
- contacting a second substrate with the adhesive applied to the first substrate.
3 more elements
A composite comprising:
- an adhesive composition sandwiched between a first and second substrate, the adhesive comprising component A having a total enthalpy of fusion of at most 20 mJ/mg and component B having a glass transition temperature of at most 60° C. in which
- a) component A comprises at least one aromatic-containing polyester with a molecular weight (Mn) of at least 8000, and
- b) component B comprises at least one polyester with a molecular weight (Mn) of less than 8000, the adhesive having a melt viscosity of 500 to 25,000 mPas (Brookfield RVT DVII, 140° C., spindle 27) and a softening point of 70 to 100° C. (ASTM E28).
Dependencies are inferred from the claim text.