JP2010018710A5 - - Google Patents

Description

Therefore, a high-performance adhesive or coating agent mainly composed of a powder composition is desired because it can be easily transported and stored, and can be used in containers such as paper bags and flexible container bags. Yes. Up to now, as powder-type compositions that meet such demands, powder additions such as one-powder-type compositions in which inorganic powders or organic powders are mixed with PVA powder at a predetermined ratio, and re-emulsified powder emulsions, etc. A one- powder composition in which products are mixed has been proposed (Patent Document 1).

Comparative Example 6
In Example 1, the test was performed in the same manner as in Example 1 except that polymeric MDI was not used. The results are shown in Table 2.

Claims (11)

An aqueous emulsion (EM-1) having a polyvinyl alcohol polymer (PVA-1) as a dispersant and a polymer having at least 70% by weight of a vinyl ester monomer unit as a dispersoid, and (meth) acrylic It consists of an aqueous emulsion (EM - 2) having a polymer having at least 70% by weight or more of monomer units selected from acid esters, styrene monomers, and diene monomers as a dispersoid, EM-1 and EM -2 solid content weight ratio (EM-1) / (EM-2) = 95/5 to 30/70 aqueous emulsion (EM) , solid content weight ratio (EM) / (PVA-2) = It is composed of a synthetic resin powder (A) obtained by blending and drying a polyvinyl alcohol polymer (PVA-2) at 100/0 to 100/25 , and (A) / (B) = 100 / 10-1 0/300 is a mixed powder (C) a polyvalent isocyanate compound (D) consisting of the adhesive composition. The polyvinyl alcohol polymer (PVA-1) is a non-modified polyvinyl alcohol having a polymerization degree of 200 to 2000 and a caking degree of 80 to 96 mol%, a polyvinyl alcohol polymer having a carboxyl group, and an α having 2 to 4 carbon atoms. -Polyvinyl alcohol polymer having 10 mol% or less of olefin-derived monomer units, polyvinyl alcohol polymer having 1,2-glycol bond in the molecule of 1.7 mol% or more, or polyvinyl having a mercapto group at the terminal The adhesive composition according to claim 1, which is an alcohol polymer. The polyvinyl alcohol polymer (PVA-2) is a non-modified polyvinyl alcohol having a polymerization degree of 200 to 2000 and a caking degree of 80 to 96 mol%, a polyvinyl alcohol polymer having a carboxyl group, an α having 2 to 4 carbon atoms. 3. A polyvinyl alcohol polymer having 10 mol% or less of an olefin-derived monomer unit or a polyvinyl alcohol polymer having 1.7 or more mol of a 1,2-glycol bond in the molecule. Adhesive composition. The adhesive composition according to any one of claims 1 to 3, wherein the aqueous emulsion (EM-1) is an emulsion obtained by emulsion polymerization of a monomer containing a monomer having a primary hydroxyl group. The adhesive composition according to any one of claims 1 to 4, wherein the aqueous emulsion (EM-2) is an emulsion obtained by emulsion polymerization of a monomer containing a monomer having a primary hydroxyl group. The adhesive composition according to any one of claims 1 to 5, wherein the aqueous emulsion (EM-2) is an emulsion obtained by emulsion polymerization using a polyvinyl alcohol polymer as a dispersant. The adhesion according to claim 6, wherein the polyvinyl alcohol polymer is a polyvinyl alcohol polymer having 1.7 mol% or more of 1,2-glycol bond in the molecule or a polyvinyl alcohol polymer having a mercapto group at the terminal. Sex composition. The adhesive composition according to any one of claims 1 to 7, wherein the synthetic resin powder (A) is obtained by spray drying. The adhesive composition according to claim 1 , wherein the inorganic powder (B) is calcium carbonate. The adhesive composition according to any one of claims 1 to 9, wherein the mixed powder (C) is redispersed in water and the polyvalent isocyanate compound (D) is blended. The adhesive composition according to any one of claims 1 to 10 , wherein the adhesive composition is an adhesive or a coating agent.