US 12,071,567 B2
Moisture resistance improver for water-based adhesive for inorganic materials, and water-based adhesive for inorganic materials
Miyuki Hayashi, Kyoto (JP); and Ai Kita, Kyoto (JP)
Assigned to Sanyo Chemical Industries, Ltd., Kyoto (JP)
Appl. No. 17/261,973
Filed by Sanyo Chemical Industries, Ltd., Kyoto (JP)
PCT Filed Jul. 24, 2018, PCT No. PCT/JP2018/027618
§ 371(c)(1), (2) Date Jan. 21, 2021,
PCT Pub. No. WO2020/021616, PCT Pub. Date Jan. 30, 2020.
Prior Publication US 2021/0292609 A1, Sep. 23, 2021
Int. Cl. C09J 11/08 (2006.01); C08F 20/06 (2006.01); C08F 20/08 (2006.01); C09J 4/00 (2006.01); C09J 103/02 (2006.01); C09J 103/10 (2006.01); C09J 129/04 (2006.01); C09J 133/02 (2006.01)
CPC C09J 11/08 (2013.01) [C08F 20/06 (2013.01); C08F 20/08 (2013.01); C09J 4/00 (2013.01); C09J 103/02 (2013.01); C09J 103/10 (2013.01); C09J 129/04 (2013.01); C09J 133/02 (2013.01)] 6 Claims
 
1. A moisture resistance improver for a water-based adhesive for inorganic materials, the moisture resistance improver comprising at least one (co)polymer (A) selected from the group consisting of the following (co)polymer (A1) and (co)polymer (A2),
(co)polymer (A1): a (co)polymer comprising an unsaturated (poly)carboxylic acid (anhydride) (a1) having 3 to 30 carbon atoms and a (meth)acrylic acid ester (a2) having a solubility at 25° C. of 10 g or less per 100 g of water as constituent monomers, and having a weight-average molecular weight of 3,000 to 150,000
(co)polymer (A2): a (co)polymer comprising an unsaturated (poly)carboxylic acid (anhydride) (a1) defined above as a constituent monomer with the proviso that no (meth)acrylic acid ester (a2) defined above being contained as a constituent monomer, and having a weight-average molecular weight of 6,000 to 150,000,
wherein, in the moisture resistance improver, the (co)polymer (A) is either
(1) a combination of the (co)polymer (A1) defined above and the (co)polymer (A2) defined above; or
(2) the (co)polymer (A1) with the proviso that the (meth)acrylic acid ester (a2) as constituent monomer in the (co)polymer (A1) is a combination of a linear alkyl ester having the linear alkyl of from 2 to 28 carbon atoms and a branched chain alkyl ester having the branched chain alkyl of from 8 to 28 carbon atoms.