Synthetic polymers having hydrogen bonding capability and containing polysiloxane moieties
AssigneeKimberly-Clark Worldwide, Inc.
InventorsWen Zyo Schroeder, Daniel Arthur Clarahan, Mike Thomas Goulet, Thomas Gerard Shannon
Life of this patent
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Abstract
Synthetic polymers having hydrogen bonding capability and one or more polysiloxane moieties are capable of providing two distinct properties to paper products, such as tissues, which properties heretofore have been imparted through the use of at least two different molecules. The backbone of these synthetic polymers is based on modified vinyl polymers, such as polyvinyl alcohol, polyacrylamides and polyacrylic acids.
Claims98
A paper sheet comprising a synthetic polymer having hydrogen bonding capability and containing one or more polysiloxane moieties, said polymer having the following structure:
- where:
- a,b>0;
- c,d≧0;
- w≧1;
- Q1=a monomer unit or a block or graft copolymer of an ethylenically unsaturated hydrocarbon containing a pendant group capable of forming hydrogen or covalent bonds with cellulose;
- Q2=a block or graft copolymer containing siloxane bonds;
- Q3=a monomer unit or a block or graft copolymer containing a charge functionality;
- and
- Q4=a monomer unit or a block or graft copolymer containing a hydrophilic moiety, which is desirable for making the material into a form suitable for papermaking.
A paper sheet comprising a synthetic polymer having hydrogen bonding capability and containing one or more polysiloxane moieties, said polymer having the following structure:
- where:
- W≧1;
- R1,R1′,R2, R3=H or C1-4alkyl;
- a, b>0;
- c,d≧0;
- R0=a group capable of forming hydrogen or covalent bonds with cellulose;
- Q4=a monomer unit or a block or graft copolymer containing a hydrophilic moiety;
- A1=—H, —COOH;
- R4=a Z1-R6 radical,
- where:
- Z1=any radical capable of bonding the R6 group to the polymer;
- R6=a block or graft copolymer containing siloxane bonds;
- R5=Z3-R10-W,
- where:
- Z3=any radical capable of bonding the R10 group to the polymer;
- R10=any linear or branched, aliphatic or aromatic hydrocarbon of 2 or more carbons;
- and
- W=—N+R11,R12,R13 , where R11, R12, R13 are C1-4 alkyl groups.
A paper sheet comprising a synthetic polymer having a moiety capable of forming covalent or hydrogen bonds with cellulose and containing one or more amphiphilic hydrocarbon moieties, said polymer having the following structure:
- where:
- w≧1;
- R1,R1′,R2, R3=H or C1-4 alkyl;
- a,b>0;
- c,d≧0;
- R0 =a group capable of forming hydrogen or covalent bonds with cellulose;
- Q4=a monomer unit or a block or graft copolymer containing a hydrophilic moiety;
- A1=—H,—COOH;
- R4=a Z1-R6 radical,
- where:
- Z1=any radical capable of bonding the R6 group to the polymer;
- R6=an amphiphilic hydrocarbon radical.
A method of making a paper sheet comprising the steps of:
- (a) forming an aqueous suspension of papermaking fibers;
- (b) depositing the aqueous suspension of papermaking fibers onto a forming fabric to form a web;
- and (c) dewatering and drying the web to form a paper sheet, wherein a synthetic polymer is added to the aqueous suspension of fibers and/or the web, said polymer having the following structure:
- where:
- a,b>0;
- c,d≧0;
- w≧1;
- Q1=a monomer unit or a block or graft copolymer of an ethylenically unsaturated hydrocarbon containing a pendant group capable of forming hydrogen or covalent bonds with cellulose;
- Q2=a block or graft copolymer containing siloxane bonds;
- Q3=a monomer unit or a block or graft copolymer containing a charge funtionality;
- and
- Q4=a monomer unit or a block or graft copolymer containing a hydrophilic moiety, which is desirable for making the material into a form suitable for papermaking.
A method of making a paper sheet comprising the steps of:
- (a) forming an aqueous suspension of papermaking fibers;
- (b) depositing the aqueous suspension of papermaking fibers onto a forming fabric to form a web;
- and (c) dewatering and drying the web to form a paper sheet, wherein a synthetic polymer is added to the aqueous suspension of fibers and/or the web, said polymer having the following structure:
- where:
- w≧1;
- R1,R1′,R2, R3=H or C1-4alkyl;
- a,b>0;
- c,d≧20;
- R0=a group capable of forming hydrogen or covalent bonds with cellulose;
- Q4=a monomer unit or a block or graft copolymer containing a hydrophilic moiety;
- A1=—H, —COOH;
- R4=a Z1-R6 radical,
- where:
- Z1=any radical capable of bonding the R6 group to the polymer;
- R6=a block or graft copolymer containing siloxane bonds;
- R5=Z3-R10-W,
- where:
- Z3=any radical capable of bonding the R10 group to the polymer;
- R10=any linear or branched, aliphatic or aromatic hydrocarbon of 2 or more carbons;
- and
- W=—N+R11,R12,R13, where R11, R12, R13 are C1-4 alkyl groups.
A method of making a paper sheet comprising the steps of:
- (a) forming an aqueous suspension of papermaking fibers;
- (b) depositing the aqueous suspension of papermaking fibers onto a forming fabric to form a web;
- and (c) dewatering and drying the web to form a paper sheet, wherein a synthetic polymer is added to the aqueous suspension of fibers and/or the web, said polymer having the following structure:
- where:
- w≧1;
- R1,R1′,R2, R3=H or C1-4alkyl;
- a, b>0;
- c,d≧0 such that c+d>0;
- R0=a group capable of forming hydrogen or covalent bonds with cellulose;
- Q4=a monomer unit or a block or graft copolymer containing a hydrophilic moiety;
- A1=—H, —COOH;
- R4=a Z1-R6,
- where:
- Z1=any radical capable of bonding the R6 group to the polymer;
- R6=a block or graft copolymer containing siloxane bonds.
A paper sheet comprising a synthetic polymer having hydrogen bonding capability and containing one or more polysiloxane moieties, said polymer having the following structure:
- where:
- a,b>0;
- c,d>0;
- w≧1;
- Q1=a monomer unit or a block or graft copolymer containing a pendant group capable of forming hydrogen or covalent bonds with cellulose;
- Q2=a block or graft copolymer containing siloxane bonds;
- Q3=a monomer unit or a block or graft copolymer containing a charge functionality;
- and
- Q4=a monomer unit or a block or graft copolymer containing a hydrophilic moiety, which is desirable for making the material into a form suitable for papermaking.
A method of making a paper sheet comprising the steps of:
- (a) forming an aqueous suspension of papermaking fibers;
- (b) depositing the aqueous suspension of papermaking fibers onto a forming fabric to form a web;
- and (c) dewatering and drying the web to form a paper sheet, wherein a synthetic polymer is added to the aqueous suspension of fibers and/or the web, said polymer having the following structure:
- where:
- a,b>0;
- c,d>0;
- w≧1;
- Q1=a monomer unit or a block or graft copolymer containing a pendant group capable of forming hydrogen or covalent bonds with cellulose;
- Q2=a block or graft copolymer containing siloxane bonds;
- Q3=a monomer unit or a block or graft copolymer containing a charge functionality;
- and
- Q4=a monomer unit or a block or graft copolymer containing a hydrophilic moiety, which is desirable for making the material into a form suitable for papermaking.
A paper sheet comprising a synthetic polymer having hydrogen bonding capability and containing one or more polysiloxane moieties, said polymer having the following structure:
- where:
- a,b>0;
- c,d≧0;
- w≧1;
- Q1 is selected from the group consisting of —CONH2, —COOH, —COO−M+, —OH, —CONHCHOHCHO and mixtures thereof, wherein M+ is a counter ion;
- monomer unit or a block or graft copolymer containing a pendant group capable of forming hydrogen or covalent bonds with cellulose;
- Q2=a block or graft copolymer containing siloxane bonds;
- Q3=a monomer unit or a block or graft copolymer containing a charge functionality;
- and
- Q4=a monomer unit or a block or graft copolymer containing a hydrophilic moiety, which is desirable for making the material into a form suitable for papermaking.
A method of making a paper sheet comprising the steps of:
- (a) forming an aqueous suspension of papermaking fibers;
- (b) depositing the aqueous suspension of papermaking fibers onto a forming fabric to form a web;
- and (c) dewatering and drying the web to form a paper sheet, wherein a synthetic polymer is added to the aqueous suspension of fibers and/or the web, said polymer having the following structure:
- where:
- a,b>0;
- c,d≧0;
- w≧1;
- Q1 is selected from the group consisting of —CONH2, —COOH, —COO−M+, —OH, CONHCHOHCHO and mixtures thereof, wherein M+ is a counter ion;
- Q2=a block or graft copolymer containing siloxane bonds;
- Q3=a monomer unit or a block or graft copolymer containing a charge functionality;
- and
- Q4=a monomer unit or a block or graft copolymer containing a hydrophilic moiety, which is desirable for making the material into a form suitable for papermaking.
Dependencies are inferred from the claim text.