Back to results
US 4,791,164 AGranted
Polymeric hotmelt adhesive
AssigneeHenkel Kommanditgesellschaft auf Aktien
InventorsJuergen Wichelhaus, Werner Gruber, Johannes Andres
Life of this patent
Estimating the term…
Abstract
A hotmelt adhesive comprising a compatible mixture of at least one polyamide based on dimeric fatty acid, and at least one copolymer or terpolymer based on ethylene, a method for manufacturing the same, and a method for using the same to adhere plastics and metals.
Claims57
A hot melt adhesive comprising:
- I:
- a polyamide consisting essentially of the reaction product of:
- (a) about 20 to 49.5 mol%, based upon 100 mol% of polyamide, of dimerized fatty acid or dimerized fatty acid replaced with at least one C.sub.4 -C.sub.12 -aliphatic dicarboxylic acid in an amount up to about 2/3 of said dimerized fatty acid on a molar basis;
- (b) about 0.5 to 15 mol %, based upon 100 mol % of polyamide, of at least one C.sub.12 -C.sub.22 monomeric fatty acid;
- and
- (c) about 20 to 55 mol %, based upon 100 mol% of polyamide, of at least one C.sub.2 -C.sub.40 -aliphatic diamine;
- wherein the weight ratio of the fatty acids (a+b) to the diamine (c) is from about 0.67 with the proviso that the polyamide has an amine number of 15 or less and
- II:
- a terpolymer based on ethylene consisting essentially of the reaction product of:
- (a) from about 50 to 95% by weight, based on the total weight of the terpolymer, of monomer selected from the group consisting of (i) ethylene;
- and (ii) ethylene and propylene, wherein the propylene is present in an amount up to about 15% by weight of ethylene;
- (b) from about 2 to 30% by weight, based upon the total weight of the terpolymer, of at least one internal anhydride of an ethylenically unsaturated carboxylic acid;
- and
- (c) from about 5 to 30% by weight, based on the total weight of terpolymer, of an ester selected from the group consisting of (i) an ester of acrylic acid with a linear or branched C.sub.1 -C.sub.18 aliphatic primary alcohol;
- (ii) an ester of methacrylic acid with a linear or branched C.sub.1 -C.sub.18 -aliphatic primary alcohol;
- (iii) a mixture thereof;
- and (iv) said acrylic acid ester or methacrylic acid ester, or mixture thereof, with an ester of vinyl alcohol and a C.sub.2 -C.sub.18 carboxylic acid
- Wherein said polyamide and said ethylene-based terpolymer are each present in an amount of from about 5 to 95% by weight, based on the weight of the adhesive.
15 more elements
A hot melt adhesive comprising:
- I:
- a polyamide consisting essentially of the reaction product of:
- (a) about 35 to 49.5 mol %, based upon 100 mol % of polyamide, of dimerized fatty acid or dimerized fatty acid replaced with at least one C.sub.4 -C.sub.12 aliphatic dicarboxylic acid in an amount up to about 2/3 of said dimerized fatty acid on a molar basis;
- (b) about 0.5 to 15 mol %, based upon 100 mol % of polyamide, of at least one C.sub.12 -C.sub.22 monomeric fatty acid;
- (c) about 2 to 35 mol %, based upon 100 mol % polyamide, of at least one polyether diamine;
- and
- (d) about 15 to 48 mol %, based upon 100 mol % polyamide, of at least one C.sub.2 -C.sub.40 aliphatic diamine;
- wherein the weight ratio of the fatty acids (a+b) to the diamines (c+d) is from about 0.67 with the proviso that the polyamide has an amine number of 15 or less and
- II:
- a terpolymer based on ethylene consisting essentially of the reaction product of:
- (a) from about 50 to 95% by weight, based on the total weight of the terpolymer, of monomer selected from the group consisting of (i) ethylene;
- and (ii) ethylene and propylene, wherein the propylene is present in an amount up to about 15% by weight of ethylene;
- (b) from about 2 to 30% by weight, based upon the total weight of the terpolymer, of at least one internal anhydride of an ethylenically unsaturated carboxylic acid;
- and
- (c) from about 5 to 30% by weight, based on the total weight of terpolymer, of an ester selected from the group consisting of (i) an ester of acrylic acid with a linear or branched C.sub.1 -C.sub.18 aliphatic primary alcohol;
- (ii) an ester of methacrylic acid with a linear or branched C.sub.1 -C.sub.18 aliphatic primary alcohol;
- (iii) a mixture thereof;
- and (iv) said acrylic acid ester or methacrylic acid ester or mixture thereof, with an ester of vinyl alcohol and a C.sub.2 -C.sub.18 carboxylic acid,
- Wherein said polyamide and said ethylene-based terpolymer are each present in an amount of from about 5 to 95% by weight, based on the weight of the adhesive.
16 more elements
Dependencies are inferred from the claim text.