Modified polyolefin resin and uses thereof
View Patent ↗It is an object of the present invention to provide a modified polyolefin resin adhesive agent which is excellent in adhesiveness to a nonpolar substrate, particularly a poorly adhesive polyolefin substrate to which no surface treatment has been given and to a polar substrate, develops the excellent adhesiveness by drying or thermal compression bonding at relatively low temperature, and exhibits a low tack. That is, the present invention provides the modified polyolefin resin obtained by modifying a polyolefin resin with (A) a polarity imparting agent which is at least one selected from chlorine, unsaturated carboxylic acid, derivatives and anhydrides of unsaturated carboxylic acid and radical polymerizable monomers; and (B) an ethylene-α-olefin copolymer having an unsaturated bond at one end, and use of said modified polyolefin resin as an aqueous resin composition or an organic solvent resin composition.
1. A modified polyolefin resin comprising:
a polyolefin resin which is (1) grafted with (A-1) and/or chlorinated; and (2) grafted with (B):
(A-1) one or more polarity imparting agents selected from the group consisting of an unsaturated carboxylic acid, a derivative of an unsaturated carboxylic acid, an anhydride of an unsaturated carboxylic acid, and a (meth) acrylic compound; and
(B) an ethylene-α-olefin copolymer of which 90% or more molecules have an unsaturated bond at one end of the main chain of said molecules.
2. The modified polyolefin resin according to claim 1 , wherein said polyolefin resin is at least one selected from the group consisting of an ethylene-propylene copolymer, an propylene-butene copolymer and an ethylene-propylene-butene copolymer.
3. The modified polyolefin resin according to claim 1 , wherein said (A-1) polarity imparting agent is a combination of an unsaturated carboxylic anhydride and an methacrylate ester.
4. The modified polyolefin resin according to claim 1 , wherein said polyolefin resin comprises 60 mol % or more propylene as a component composition.
5. The modified polyolefin resin according to claim 1 , wherein the polyolefin resin is at least chlorinated and the amount of chlorine in the modified polyolefin resin is 2 weight % to 35 weight %.
6. The modified polyolefin resin according to claim 1 , wherein an amount of said unsaturated carboxylic anhydride in the modified polyolefin resin is 0.5 weight % to 20 weight %, and an amount of said methacrylate ester in the modified polyolefin resin is 0.1 weight % to 30 weight %.
7. The modified polyolefin resin according to claim 1 , wherein the polyolefin is chlorinated.
8. The modified polyolefin resin according to claim 1 , wherein the polarity imparting agent is an unsaturated carboxylic acid.
9. The modified polyolefin resin according to claim 1 , wherein the polarity imparting agent is a derivative of an unsaturated carboxylic acid.
10. The modified polyolefin resin according to claim 1 , wherein the polarity imparting agent is an anhydride of an unsaturated carboxylic acid.
11. The modified polyolefin resin according to claim 1 , wherein the polarity imparting agent is a (meth) acrylic compound.
12. The modified polyolefin resin according to claim 11 , wherein the (meth) acrylic compound comprises (meth)acrylic acid, methyl(meth)acrylate, ethyl(meth)acrylate, n-butyl(meth)acrylate, cyclohexyl(meth)acrylate, hydroxyethyl(meth)acrylate, isobornyl(meth)acrylate, glycidyl(meth)acrylate, octyl(meth)acrylate, lauryl(meth)acrylate, tridecyl(meth)acrylate, stearyl(meth)acrylate, benzyl(meth)acrylate, phenyl(meth)acrylate, dimethylaminoethyl(meth)acrylate, diethylaminoethyl(meth)acrylate, 2-hydroxyethyl(meth)acrylate, N,N-dimethylaminoethyl(meth)acrylate, acetoacetoxyethyl(meth)acrylate, N-methyl(meth)acrylamide, N-ethyl(meth)acrylamide, N-propyl(meth)acrylamide, N-isopropyl(meth)acrylamide, N-butyl(meth)acrylamide, N-isobutyl(meth)acrylamide, N-t-butyl(meth)acrylamide, N,N-dimethyl(meth)acrylamide, N,N-dimethylaminopropyl(meth)acrylamide, N,N-methylene-bis(meth)acrylamide, N-methylol(meth)acrylamide, hydroxyethyl(meth)acrylamide or (meth)acryloylmorpholine.
13. The modified polyolefin resin according to claim 11 , wherein the (meth) acrylic compound is methyl(meth)acrylate, ethyl(meth)acrylate, cyclohexyl(meth)acrylate or lauryl(meth)acrylate.
14. The modified polyolefin resin according to claim 11 , wherein the weight average molecular weight of the ethylene-α-olefin copolymer is 800 to 30,000.
15. An aqueous resin composition comprising:
an aqueous solvent, and
the modified polyolefin resin according to claim 1 .
16. The aqueous resin composition according to claim 15 , wherein said modified polyolefin resin is emulsified in said aqueous solvent.
17. The aqueous resin composition according to claim 15 , wherein pH value thereof is 6-10.
18. An organic solvent resin composition comprising:
an organic solvent and
the modified polyolefin resin according to claim 1 .