The invention relates to a method for welding a polyolefin plastic and a plastic based on at least one polymer containing carbonyl groups, using a primer which contains, in relation to the proportion of polymer in said primer, at least 20 wt. % of a polymer that comprises maleic anhydride or maleic anhydride derivative units. The invention also relates to correspondingly welded products.

The invention relates to a method for welding a polyolefin plastic and a plastic based on at least one polymer containing carbonyl groups, using a primer which contains, in relation to the proportion of polymer in said primer, at least 20 wt. % of a polymer that comprises maleic anhydride or maleic anhydride derivative units. The invention also relates to correspondingly welded products.

The invention describes a method for the production of a biodegradable superabsorbent composite polymer material, characterized by high absorbency under load. The invention also describes novel composite material made of styrene maleic acid copolymer preferably in salt form and a biopolymer, coated with biodegradable coating agents and crosslinked.

The invention describes a method for the production of a biodegradable superabsorbent composite polymer material, characterized by high absorbency under load. The invention also describes novel composite material made of styrene maleic acid copolymer preferably in salt form and a biopolymer, coated with biodegradable coating agents and crosslinked.

Treating a subterranean formation with a composition including a maleic anhydride copolymer and an aminosilane crosslinker. The maleic anhydride copolymer includes first repeat units I and II and at least one of second repeat units III and IV:

##STR00001##

where each R.sup.1 is independently H, O(C.sub.1-C.sub.5) alkyl, or (C.sub.1-C.sub.5) alkyl; each R.sup.2 is independently H, O(C.sub.1-C.sub.5) alkyl, or (C.sub.1-C.sub.5) alkyl; each R.sup.3 is independently OH or O.sup.M.sup.1, each M.sup.1 is independently an alkali metal, an alkaline earth metal, an ammonium ion, or a quaternary ammonium ion; and each R.sup.4 is independently NH.sub.2 or OM.sup.1. The aminosilane crosslinker has at least one primary amine group. Siloxane bonds may be formed between the aminosilane crosslinker and a siliceous material in contact with the gelled composition in the subterranean formation.

Treating a subterranean formation with a composition including a maleic anhydride copolymer and an aminosilane crosslinker. The maleic anhydride copolymer includes first repeat units I and II and at least one of second repeat units III and IV:

##STR00001##

where each R.sup.1 is independently H, O(C.sub.1-C.sub.5) alkyl, or (C.sub.1-C.sub.5) alkyl; each R.sup.2 is independently H, O(C.sub.1-C.sub.5) alkyl, or (C.sub.1-C.sub.5) alkyl; each R.sup.3 is independently OH or O.sup.M.sup.1, each M.sup.1 is independently an alkali metal, an alkaline earth metal, an ammonium ion, or a quaternary ammonium ion; and each R.sup.4 is independently NH.sub.2 or OM.sup.1. The aminosilane crosslinker has at least one primary amine group. Siloxane bonds may be formed between the aminosilane crosslinker and a siliceous material in contact with the gelled composition in the subterranean formation.

The invention describes a method for the production of a biodegradable superabsorbent composite polymer material, characterized by high absorbency under load. The invention also describes novel composite material made of styrene maleic acid copolymer preferably in salt form and a biopolymer, coated with biodegradable coating agents and crosslinked.

The invention describes a method for the production of a biodegradable superabsorbent composite polymer material, characterized by high absorbency under load. The invention also describes novel composite material made of styrene maleic acid copolymer preferably in salt form and a biopolymer, coated with biodegradable coating agents and crosslinked.

An adhesive composition having high room-temperature peel strength, high hot peel strength, and excellent adhesion, as well as excellent electrolyte resistance even when used for packaging materials for lithium ion batteries is provided, which contains an organic solvent, a polyolefin (A) that has an acidic group and/or an acid anhydride group and is soluble in the organic solvent, and an isocyanate compound, wherein the isocyanate compound comprises (B) a diisocyanate compound having a C4-7 hydrocarbon group and/or a derivative thereof, and (C) a diisocyanate compound having a C8-14 hydrocarbon group and/or a derivative thereof; and a heat-fusible member using the adhesive composition is also provided.

An adhesive composition having high room-temperature peel strength, high hot peel strength, and excellent adhesion, as well as excellent electrolyte resistance even when used for packaging materials for lithium ion batteries is provided, which contains an organic solvent, a polyolefin (A) that has an acidic group and/or an acid anhydride group and is soluble in the organic solvent, and an isocyanate compound, wherein the isocyanate compound comprises (B) a diisocyanate compound having a C4-7 hydrocarbon group and/or a derivative thereof, and (C) a diisocyanate compound having a C8-14 hydrocarbon group and/or a derivative thereof; and a heat-fusible member using the adhesive composition is also provided.