A one-component type polyurethane prepolymer composition comprises a reaction product formed through a reaction between reactants comprising (a) at least one polyisocyanate, and (b) a polyol blend comprising at least one bifunctional polyether polyol, wherein the bifunctional polyether polyol is a homopolymer of propylene oxide, homopolymer of butylene oxide, or copolymer of alkylene oxide, and has a number average molecular weight from 3000 g/mol to 9000 g/mol, and at least one trifunctional polyether polyol, wherein the trifunctional polyether polyol is a copolymer of alkylene oxide and end-capped with 10 wt % to 28 wt %, by the total weight of the trifunctional polyether polyol, of ethylene oxide, and has a number average molecular weight from 5000 g/mol to 8000 g/mol, wherein the bifunctional polyether polyol and the trifunctional polyether polyol are present in a parts by weight ratio from 4:1 to 2.5:1, and wherein the polyisocyanate and the polyol blend are present in a parts by weight ratio of from 1:7 to 1:2.5.

A technique for physical interaction of nanocellulose, a method of separating nanocellulose from water in an aqueous solution using a physical interaction promoter, and a method for synthesis of a cellulose interaction promoter capable of increasing the dispersibility of nanocellulose in a polymer matrix and improving the physical properties of a polymer composite material are provided.

A technique for physical interaction of nanocellulose, a method of separating nanocellulose from water in an aqueous solution using a physical interaction promoter, and a method for synthesis of a cellulose interaction promoter capable of increasing the dispersibility of nanocellulose in a polymer matrix and improving the physical properties of a polymer composite material are provided.

1) Ionic silylated copolyurethane of formula:

##STR00001##

in which R.sup.1 is a hydrocarbon radical; R.sup.2 is a C2-C4 alkylene; n is an integer such that the molecular mass of —[OR.sup.2].sub.n is 2500-20 000 g/mol; R.sup.∘ is H or C1-C18 alkyl; R, R′ and R″ are a hydrocarbon-based radical; x and y are integers from 1 à 8; z is an integer from 0 to 8; m and q are an integer of greater than or equal to 1, such that q/m ranges from 0.04 to 20; F.sup.1 is a radical of formula (IIa) and F.sup.2 is a radical of formula (IIb):

##STR00002## in which R.sup.3 is methylene or n-propylene; R.sup.4 and R.sup.5 are methyl or ethyl; p is equal to 0 or 1; R.sup.6 is a C1-C4 alkyl.

2) Process for preparing copolyurethane 1), comprising: (i) polyaddition between a polyisocyanate, a polyether diol and a carboxylic diol; (ii) neutralization of the product formed with the amine N(R)(R′)(R″); then (iii) reaction with an aminosilane derived from a secondary amine.

3) Composition, usable as sealant and/or adhesive, comprising copolyurethane 1) and a filler.

1) Ionic silylated copolyurethane of formula:

##STR00001##

in which R.sup.1 is a hydrocarbon radical; R.sup.2 is a C2-C4 alkylene; n is an integer such that the molecular mass of —[OR.sup.2].sub.n is 2500-20 000 g/mol; R.sup.∘ is H or C1-C18 alkyl; R, R′ and R″ are a hydrocarbon-based radical; x and y are integers from 1 à 8; z is an integer from 0 to 8; m and q are an integer of greater than or equal to 1, such that q/m ranges from 0.04 to 20; F.sup.1 is a radical of formula (IIa) and F.sup.2 is a radical of formula (IIb):

##STR00002## in which R.sup.3 is methylene or n-propylene; R.sup.4 and R.sup.5 are methyl or ethyl; p is equal to 0 or 1; R.sup.6 is a C1-C4 alkyl.

2) Process for preparing copolyurethane 1), comprising: (i) polyaddition between a polyisocyanate, a polyether diol and a carboxylic diol; (ii) neutralization of the product formed with the amine N(R)(R′)(R″); then (iii) reaction with an aminosilane derived from a secondary amine.

3) Composition, usable as sealant and/or adhesive, comprising copolyurethane 1) and a filler.

Provided is a water-based coating composition capable of exhibiting high coating film performance even when cured at relatively low temperatures. Disclosed is a water-based coating composition including (A) a hydroxyl group-containing resin and (B) a hardener, wherein at least one type of (A) the hydroxyl group-containing resin is a hydroxyl group-containing acrylic resin particle (A1) having a core-shell structure containing a gradient polymer layer.

A thermally-conductive structural adhesive for new energy power batteries, including: composition A including 3.3-14 wt. % of a block polymerized telechelic carboxyl compound and/or a block polymerized telechelic amino compound; 0.1-1.0 wt. % of a coupling agent and/or a modifier; 0-1.6 wt. % of curing accelerator; 84-92 wt. % of a thermally-conductive powder; and 0.3-3.0 wt. % of a flame retardant agent; and composition B including 3.3-14 wt. % of a block polymerized telechelic isocyanate compound and/or a block polymerized telechelic epoxy compound; 0-1.0 wt. % of a coupling agent and/or a modifier; 0-1.6 wt. % of a curing accelerator; 84-92 wt. % of a thermally-conductive powder; and 0.3-3 wt. % of a flame retardant agent. The composition A and the composition B are mixed evenly in a weight or volume ratio of 1:(0.25-2) and cured to obtain the thermally-conductive structural adhesive. A preparation of the thermally-conductive structural adhesive is also provided.

The resealable bag has a main body including a resealing layer. The resealable bag is selectively positionable between an open, unsealed position and a closed, sealed position. When the resealable bag is in the closed, sealed position, the resealing layer is in a deformed shape. Advantageously, the resealable bag can be repeatedly rolled and sealed, and unrolled and unsealed, as desired without the use of additional integrated or non-integrated sealing mechanisms.

The resealable bag has a main body including a resealing layer. The resealable bag is selectively positionable between an open, unsealed position and a closed, sealed position. When the resealable bag is in the closed, sealed position, the resealing layer is in a deformed shape. Advantageously, the resealable bag can be repeatedly rolled and sealed, and unrolled and unsealed, as desired without the use of additional integrated or non-integrated sealing mechanisms.

The use of an aldehyde mixture containing 70 to 95 wt % of aldehydes of formula (I) and 5 to 30 wt % of alkylbenzene compounds not corresponding to formula (I) as a blocking agent for amines results in odorless, especially economically blocked amines, which at room temperature are typically liquid and have a surprisingly low viscosity. Such blocked amines are particularly suitable as latent hardeners in isocyanate-group-containing compositions. Single-component moisture-curing polyurethane compositions formulated therewith are surprisingly stable in storage, can be used for low-emission applications without odor problems and do not trigger any problems with plasticizer migration. Surprisingly, said compositions even have advantages over corresponding compositions having latent hardeners based on purified aldehydes of formula (I), in particular with respect to viscosity, storage stability and especially strength.