Abstract Synthetic resin binder compositions which comprise about 10 to about 50% by weight of a polymodal molecular weight distribution synthetic acrylic ester resin in which (1) one mode or peak is present in the molecular weight range of from about 300 to about 2000 and another mode or peak is present in the molecular weight range of from about 4000 to about 600,000 and (2) from about 10 to about 40% by weight has a molecular weight in the range of from about 300 to about 2000 and from about 90 to about 60% by weight has a molecular weight in the range of from about 4000 to about 600,000 said polymodal molecular weight distribution synthetic acrylic ester resin having a swell index in tetrahydrofuran of from about 50 to about 200, from about 50 to about 90% by weight of insolubles in tetrahydrofuran, and a second order glass transition temperature of from about -40*C. to about +5*C.
A SYNTHETIC RESIN BINDER COMPOSITION FOR BINDING POROUS, ABSORBENT, FIBROUS NONWOVEN FABRICS COMPRISING FROM ABOUT 10 TO ABOUT 50% BY WEIGHT OF A POLYMODAL SYNTHETIC NMETHYLOL ACRYLAMIDE CROSS-LINKED COPOLYMERIC ALKYL ESTER OF ACRYLIC ACID RESIN IN WHICH FROM ABOUT 10 TO ABOUT 40% BY WEIGHT HAS A MOLECULAR WEIGHT IN THE RANGE OF FROM ABOUT 300 TO ABOUT 2000 AND IN WHICH FROM ABOUT 90 TO ABOUT 60% BY WEIGHT HAS A MOLECULAR WEIGHT IN THE RANGE OF FROM ABOUT 4000 TO ABOUT 600,000, SAID POLYMODAL SYNTHETIC N-METHYLOL ACRYLAMIDE CROSS-LINKED COPOLYMERIC ACRYLIC ACID ESTER RESIN HAVING A SWEEL INDEX IN TETRAHYDROFURAN OF FROM ABOUT 50 TO ABOUT 200 AND CONTAINING FROM ABOUT 50 TO ABOUT 90% BY WEIGHT OF INSOLUBLES IN TETRAHYDROFURAN.
Claim 2
Dependent Claim
122 words
A SYNTHETIC RESIN BINDER COMPOSITION FOR BINDING POROUS, ABSORBENT, FIBROUS NONWOVEN FABRICS COMPRISING FROM ABOUT 10 TO ABOUT 50% BY WEIGHT OF A POLYMODAL SYNTHETIC NMETHYLOL ACRYLAMIDE CROSS-LINKED COPOLYMERIC ALKYL ESTER OF ACRYLIC ACID RESIN IN WHICH FROM ABOUT 10 TO ABOUT 40% BY WEIGHT HAS A MOLECULAR WEIGHT IN THE RANGE OF FROM ABOUT 300 TO ABOUT 2000 AND IN WHICH FROM ABOUT 90 TO ABOUT 60% BY WEIGHT HAS A MOLECULAR WEIGHT IN THE RANGE OF FROM ABOUT 4000 TO ABOUT 600,000, SAID POLYMODAL SYNTHETIC N-METHYLOL ACRYLAMIDE CROSS-LINKED COPOLYMERIC ACRYLIC ACID ESTER RESIN HAVING A SWEEL INDEX IN TETRAHYDROFURAN OF FROM ABOUT 50 TO ABOUT 200 AND CONTAINING FROM ABOUT 50 TO ABOUT 90% BY WEIGHT OF INSOLUBLES IN TETRAHYDROFURAN.
Claim 3
Dependent Claim
36 words
A synthetic resin binder composition as defined in claim 1, wherein said polymodal synthetic N-methylol acrylamide cross-linked copolymeric alkyl ester of acrylic acid resin is an N-methylol acrylamide cross-linked copolymer of ethyl acrylate and butyl acrylate.
Claim 4
Dependent Claim
39 words
A synthetic resin binder composition as defined in claim 1, wherein said polymodal synthetic N-methylol acrylamide cross-linked copolymeric alkyl ester of acrylic acid resin is an N-methylol acrylamide cross-linked copolymer of ethyl acrylate, butyl acrylate, and ethyl hexyl acrylate.