A mixture for treating a hydrophobic surface and a method for treating hydrophobic surfaces is provided. The mixture comprises: a wetting agent comprising; a compound of Formula I:

R.sup.1((CH.sub.2CH.sub.2O).sub.nR.sup.2).sub.x  Formula I wherein: R.sup.1 is a core group derived from a linear, cyclic or branched polyol with 1-55 carbons or a linear, cyclic or branched polyamine with 1-22 carbons wherein hydrogens on the alcohol group or hydrogens on the amine group are replaced with (CH.sub.2CH.sub.2O).sub.n or R.sup.1 is defined by —R.sup.6(—C(═O)O—).sub.m; R.sup.2 is a hydrophobic group preferably selected from the group consisting of R.sup.3, the elements necessary to form an ester, specifically —COR.sup.4, or the elements necessary to form a urethane, specifically —CONHR.sup.5; R.sup.3-R.sup.5 are each independently an alkyl of 6-22 carbons, wherein the alkyl is a linear, cyclic or branched and preferably linear; n, on average is 4-100; x is 2-20; R.sup.6 represents a bond or a linear, cyclic or branched alkyl with 6-22 carbons; and m is 2-20.

A mixture for treating a hydrophobic surface and a method for treating hydrophobic surfaces is provided. The mixture comprises: a wetting agent comprising; a compound of Formula I:

R.sup.1((CH.sub.2CH.sub.2O).sub.nR.sup.2).sub.x  Formula I wherein: R.sup.1 is a core group derived from a linear, cyclic or branched polyol with 1-55 carbons or a linear, cyclic or branched polyamine with 1-22 carbons wherein hydrogens on the alcohol group or hydrogens on the amine group are replaced with (CH.sub.2CH.sub.2O).sub.n or R.sup.1 is defined by —R.sup.6(—C(═O)O—).sub.m; R.sup.2 is a hydrophobic group preferably selected from the group consisting of R.sup.3, the elements necessary to form an ester, specifically —COR.sup.4, or the elements necessary to form a urethane, specifically —CONHR.sup.5; R.sup.3-R.sup.5 are each independently an alkyl of 6-22 carbons, wherein the alkyl is a linear, cyclic or branched and preferably linear; n, on average is 4-100; x is 2-20; R.sup.6 represents a bond or a linear, cyclic or branched alkyl with 6-22 carbons; and m is 2-20.

formaldehyde-based polymer composite is coated on a surface of the biodegradable polymer fabric, and is embedded in meshes of the biodegradable polymer fabric. There is intermolecular hydrogen-bond interaction between the biodegradable urea-formaldehyde-based polymer composite and the biodegradable polymer fabric.

formaldehyde-based polymer composite is coated on a surface of the biodegradable polymer fabric, and is embedded in meshes of the biodegradable polymer fabric. There is intermolecular hydrogen-bond interaction between the biodegradable urea-formaldehyde-based polymer composite and the biodegradable polymer fabric.

Provided is a method and mixture for treating a hydrophobic surface. The mixture comprises a wetting agent comprising;

a compound of Formula I:

##STR00001##

wherein:
R and R′ are independently selected from the group consisting of H, C.sub.1-24 alkyl, aryl, C.sub.1-24 alkylaryl, aryl(C.sub.1-24)alkyl, —C(═O)—R.sup.1, C(═O)—NHR.sup.1, and C(═O)—O—R.sup.1 wherein R.sup.1 is selected from the group consisting of C.sub.1-24 alkyl, aryl, C.sub.1-24 alkylaryl, C.sub.1-24 arylalkyl; A is an organic moiety derived from the group consisting of alkylene oxides having 4-12 carbon atoms and aryl epoxides having 8-12 carbon atoms; x=1-300; y=0-200; z=0-200; and
with the proviso that R and R′ cannot be H or ether functionality at the same time; and a compound of Formula II:

[R.sup.2O—(CH.sub.2CH.sub.2O).sub.x—(CH.sub.2CH(CH.sub.3)O).sub.y].sub.z—P(O)(OM).sub.3-z  Formula II

where R.sup.2 is C1-C24 alkyl, aryl, alkaryl; x=0-20; y=0-20; z=1 or 2 and M is H, Na, K, Ca, Mg or Li.

This disclosure relates to water-absorbing and slow/controlled release fertilizer, in particular to a water-absorbing and water-retaining multi-nutrient biodegradable polymeric slow/controlled release fertilizer having a semi-interpenetrating network structure, and preparation methods thereof. The method can comprises the steps of: reacting formaldehyde with urea to obtain a hydroxymethyl urea solution; adding acrylic acid and acrylamide monomers into another reactor, and adding a KOH solution to adjust the neutralization degree of acrylic acid, then adding one of inorganic clay, pretreated crop straw or cellulose, then adding initiator, monopotassium phosphate and the prepared hydroxymethyl urea solution sequentially; allowing to react at temperature after being mixed uniformly to obtain a viscous product; and granulating the viscous product and oven drying the same to obtain the fertilizer. The fertilizer prepared according to the present invention has strong water-absorbing and water-retaining capacity, and an excellent slow release performance for nitrogen, phosphorus and potassium contained as nutrients.

This disclosure relates to water-absorbing and slow/controlled release fertilizer, in particular to a water-absorbing and water-retaining multi-nutrient biodegradable polymeric slow/controlled release fertilizer having a semi-interpenetrating network structure, and preparation methods thereof. The method can comprises the steps of: reacting formaldehyde with urea to obtain a hydroxymethyl urea solution; adding acrylic acid and acrylamide monomers into another reactor, and adding a KOH solution to adjust the neutralization degree of acrylic acid, then adding one of inorganic clay, pretreated crop straw or cellulose, then adding initiator, monopotassium phosphate and the prepared hydroxymethyl urea solution sequentially; allowing to react at temperature after being mixed uniformly to obtain a viscous product; and granulating the viscous product and oven drying the same to obtain the fertilizer. The fertilizer prepared according to the present invention has strong water-absorbing and water-retaining capacity, and an excellent slow release performance for nitrogen, phosphorus and potassium contained as nutrients.

This disclosure relates to water-absorbing and slow/controlled release fertilizer, in particular to a water-absorbing and water-retaining multi-nutrient biodegradable polymeric slow/controlled release fertilizer having a semi-interpenetrating network structure, and preparation methods thereof. The method can comprises the steps of: reacting formaldehyde with urea to obtain a hydroxymethyl urea solution; adding acrylic acid and acrylamide monomers into another reactor, and adding a KOH solution to adjust the neutralization degree of acrylic acid, then adding one of inorganic clay, pretreated crop straw or cellulose, then adding initiator, monopotassium phosphate and the prepared hydroxymethyl urea solution sequentially; allowing to react at temperature after being mixed uniformly to obtain a viscous product; and granulating the viscous product and oven drying the same to obtain the fertilizer. The fertilizer prepared according to the present invention has strong water-absorbing and water-retaining capacity, and an excellent slow release performance for nitrogen, phosphorus and potassium contained as nutrients.

This disclosure relates to water-absorbing and slow/controlled release fertilizer, in particular to a water-absorbing and water-retaining multi-nutrient biodegradable polymeric slow/controlled release fertilizer having a semi-interpenetrating network structure, and preparation methods thereof. The method can comprises the steps of: reacting formaldehyde with urea to obtain a hydroxymethyl urea solution; adding acrylic acid and acrylamide monomers into another reactor, and adding a KOH solution to adjust the neutralization degree of acrylic acid, then adding one of inorganic clay, pretreated crop straw or cellulose, then adding initiator, monopotassium phosphate and the prepared hydroxymethyl urea solution sequentially; allowing to react at temperature after being mixed uniformly to obtain a viscous product; and granulating the viscous product and oven drying the same to obtain the fertilizer. The fertilizer prepared according to the present invention has strong water-absorbing and water-retaining capacity, and an excellent slow release performance for nitrogen, phosphorus and potassium contained as nutrients.