Modified condensation polymers having azetidinium groups and containing polysiloxane moieties

A paper sheet, such as a tissue or towel sheet, comprising an amount of a condensation polymer having the following structure:

• 23
• where
• w≧1
• q≧0
• m≧1
• n≧1
• p≧0
• Z1, Z2, Z3=bridging radicals, which may be the same or different and which serve to incorporate the R1, R2, and R3 groups into the polymer;
• R1=a monomer unit or a block or graft copolymer containing a siloxane functionality and of the form —O—Si(R′)2—O—[Si(R″)2—O]n—Si(R′″)3 where R′, R″, R′″ can be the same or different and are selected from the group consisting of:
• H, OH and aryl or alkyl or aliphatic hydrocarbon, C1-40, linear or branched, saturated or unsaturated, substituted or non-substituted, with or without ethyoxylation and/or propoxylation;
• R2=any linear or branched, saturated or unsaturated, substituted or non-substituted aliphatic hydrocarbon containing at least one secondary amine group;
• R3=any linear or branched, saturated or unsaturated, substituted or non-substituted aliphatic hydrocarbon of chain length 2 or higher.

A method of making a paper sheet such as a tissue or towel 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 condensation polymer is added to the aqueous suspension, said condensation polymer having the following structure:
• 27
• where
• w≧1
• q≧0
• m≧1
• n≧1
• p≧0
• Z1, Z2, Z3=bridging radicals, which may be the same or different and which serve to incorporate the R1, R2, and R3 groups into the polymer;
• R1=a monomer unit or a block or graft copolymer containing a siloxane functionality and of the form —O—Si(R′)2—O—[Si(R″)2—O]n—Si(R′″)3 where R′, R″, R′″ can be the same or different and are selected from the group consisting of:
• H, OH and aryl or alkyl or aliphatic hydrocarbon, C1-40, linear or branched, saturated or unsaturated, substituted or non-substituted, with or without ethyoxylation and/or propoxylation;
• R2 =any linear or branched, saturated or unsaturated, substituted or non-substituted aliphatic hydrocarbon containing at least one secondary amine group;
• R3 =any linear or branched, saturated or unsaturated, substituted or non-substituted aliphatic hydrocarbon of chain length 2 or higher.