Dual action heat management treatment formulations for textiles

Abstract

Thermoregulating aqueous textile coating formulation or precursor thereof including at least one hydro-functional polymer as well as at least one encapsulated functional phase change material.

1 . Thermoregulating aqueous textile coating formulation or precursor thereof comprising at least one hydro-functional polymer as well as at least one encapsulated functional phase change material. 
     
     
         2 . Coating formulation according to  claim 1 , wherein the concentration of the at least one hydro-functional polymer is in the range of 0.1-20% by weight, or 0.2-10% by weight, or in the range of 0.25-5% by weight or 0.3-2% by weight;
 and/or wherein the concentration of the at least one encapsulated functional phase change material is in the range of 1-40% by weight, or in the range of 2-30% by weight or 5-25% by weight;   and/or wherein the weight percent ratio between the hydro-functional polymer and the encapsulated functional phase change material is in the range of 1:2-1:50, or in the range of 1:4-1:45 or in the range of 1:5-1:40.   
     
     
         3 . Coating formulation according to  claim 1 , wherein it consists of the following components:
 (A) 0.1-20% by weight, or 0.25-5% by weight of at least one hydro-functional polymer;   (B) 1-40% by weight, or 2-30% by weight of at least one encapsulated functional phase change material;   (C) 0-30% by weight, or 0.1-25% by weight of further additives different from (A), (B) and (D);   (D) 40-90% by weight, or 55-85% by weight of solvent, including water   wherein the components (A)-(D) sum up to 100% by weight of the coating formulation or precursor thereof.   
     
     
         4 . Coating formulation according to  claim 1 , wherein component (C) is present in the formulation in a proportion in the range of 0.1-30% by weight, or in the range of 0.1-25% by weight or 0.1-20% by weight, in particular in case of a precursor coating formulation;
 and/or wherein the further additives of component (C) are selected from the group consisting of: defoamers, including those selected as silicone-based defoamers, or a mixture thereof; softeners, including those selected as polysiloxane based softener emulsions, or a mixture thereof; metal salts, including those selected as NaCl, further ionic strengths modifiers (alkali or earth alkali salts), or mixtures thereof; binders, including acrylate-based binders, or a mixture thereof; colourants; surfactants, rheology modifiers including thickeners; antioxidants, buffers (pH regulation), antimicrobial formulations, natural oil emulsions, probiotic formulations or mixtures thereof.   
     
     
         5 . Coating formulation according to  claim 1 , wherein the at least one hydro-functional polymer is a PPG/PEG block-copolymer (I) or a mixture thereof: 
       
         
           
           
               
               
           
         
         wherein 
         the average value of x is in the range of 27-63, or in the range of 37-45; 
         the average value of y is in the range of y is in the range of 6-11, wherein the value of y in the left and in the right structural moiety as represented above can be different but within that range; 
         R′ and R″ are selected, independently from each other, from the group consisting of: 
         hydrogen, saturated or at least partly unsaturated linear, cyclic or branched hydrocarbon chain with 1-18 carbon atoms, in which one or more carbon atoms can be replaced by a heteroatom selected from the group consisting of: nitrogen, oxygen, sulfur; 
         and 
         wherein the PPG/PEG block-copolymer (I) has a DSC-melting point (peak value) according to DIN ISO 11357 in the range of 15-37° C., 
         wherein the average value of x can be in the range of 38-42, or in the range of 39-41. 
       
     
     
         6 . Coating formulation according to  claim 5 , wherein the average value of y is in the range of 7-10, or in the range of 8-9, and wherein the values of y in the left and in the right structural moiety as represented above can be the same, or x is 41 and y is 9
 and/or wherein R′ and R″ are selected, independently from each other, from the group consisting of: hydrogen, saturated or at least partly unsaturated linear, cyclic or branched hydrocarbon chain with 1-6 carbon atoms, including those selected from the group: methyl, ethyl, n-propyl, iso-propyl, n-butyl, iso-butyl, sec-butyl, tert-butyl, n-pentyl, 2-pentyl, 3-pentyl, 2-methylbutyl, 3-methylbutyl, 3-methylbut-2-yl, 2-methylbut-2-yl, 2,2-dimethylpropyl, at least one of R′ and R″ can be selected not to be hydrogen   and/or wherein R′ and R″ are selected, independently from each other, from the group consisting of: hydrogen, n-butyl, wherein R′ can be selected to be n-butyl and R″ can be selected to be hydrogen   and/or wherein the PPG/PEG block-copolymer (I) has a DSC-melting point according to DIN ISO 11357 in the range of 20-35° C., or in the range of 25-33° C.,   and/or wherein the onset in of the peak in the DSC is below 0° C.   and/or wherein the end of the peak in the DSC is below 50° C., or below 45° C.;   and/or wherein the full width at half height of the peak is smaller than 20° C., or smaller than 15° C.;   and/or wherein the peak in the DSC is bimodal or monomodal.   
     
     
         7 . Formulation according to  claim 5 , wherein the total average molecular weight of the PPG/PEG block-copolymer (I) is in the range of 2500-3200 Da, or in the range of 2750-3000 Da, and if R′ is selected to be n-butyl and R″ is selected to be hydrogen, the average molecular weight can be in the range of 2750-2950 Da, and if R′═R″ and selected to be n-butyl the average molecular weight can be in the range of 2800-3000 Da,
 and/or wherein PPG/PEG block-copolymer (I) is present in the formulation in unencapsulated form, 
 and/or wherein the viscosity of the formulation as to be used for printing application has a viscosity between 12,000 and 20,000 centipoises (cPs). 
 
     
     
         8 . Coating formulation according to  claim 1 , wherein the at least one encapsulated functional phase change material is a microencapsulated functional polymeric phase change material,
 and/or wherein the at least one encapsulated functional phase change material is a functional polymeric phase change material with at least one crystallizable section, including those comprising a backbone and side chains, wherein the side chains can form a crystallizable section,   and/or wherein the at least one encapsulated functional phase change material is a functional polymeric phase change material with a molecular weight of at least 500 Daltons, or at least 2000 Daltons, wherein the weight of crystallizable sections can make up at least 20%, or at least 50%, or at least 70% of the total weight of the functional polymeric phase change material.   
     
     
         9 . Coating formulation according to  claim 1 , wherein the at least one encapsulated functional phase change material has a single-phase change temperature or multiple such temperatures, wherein it can have at least one phase change temperature in the range between −10° C. and 100° C., or in the range of 10° C. and 60° C. and/or a phase change enthalpy of at least 25 J/g. 
     
     
         10 . Coating formulation according to  claim 1 , wherein the at least one encapsulated functional phase change material is selected from the group consisting of: paraffinic, vinylic, glycolic, olefinic, acrylate, methacrylate, including systems based on at least one of (longchain) polyacrylate or polymethacrylate, (longchain) alkyl vinyl ester, (longchain) vinyl ether, (longchain) alkyl olefins. 
     
     
         11 . Method of using a formulation according to  claim 1  for the coating of fibers and/or textiles, wherein the fibers and/or textiles can be based on cotton, hemp, flax, lyocell, rayon, jute, wool, polyester, polyamide, modacrylic, olefinic, acrylic, or a mixture and/or blend thereof, to impart a thermoregulating effect. 
     
     
         12 . Method according to  claim 11 , wherein the textiles are cotton or cotton-based textiles, including those with thread count higher than 250 and 70 singles yarn count, and wherein the formulation can be applied by (patterned) printing, including (roll) screen printing, wherein the viscosity of the formulation as to be used for printing application can have a viscosity between 12,000 and 20,000 centipoises (cPs), wherein the coverage area of the printing can be in the range of 70-80% of the full area, wherein the dry add on (DAO) of the formulation can be in the range of 5-30 g/m 2 , or 10-20 g/m 2 , wherein before treatment with the formulation the textiles can be treated with a softener formulation and/or cationic fixer formulation, including those based on quaternary polyamine systems. 
     
     
         13 . Method for treatment of cotton or cotton-based textiles with a formulation according to  claim 1 , including impart a thermoregulating effect. 
     
     
         14 . Method according to  claim 12 , wherein subsequent to the treatment with the formulation the textiles are subjected to at least one of the following post-treatments after drying: padding, sanforization, compacting, calendaring, decatizing, raising, emerizing, condensation of crosslinkers or self-crosslinking polymers. 
     
     
         15 . Cotton or cotton based, including woven textile treated with a formulation according to  claim 1 , including woven bed textile with at least 50% or at least 75% coverage area of saif formulation on cotton woven fabrics including those with thread count higher than 250 and 70 singles yarn count.