Compositions for bonding fibrous substrates

• US 4,412,017 A
• Filed: 06/05/1981
• Issued: 10/25/1983
• Est. Priority Date: 02/15/1980
• Status: Expired due to Fees

• Current Assignee: Monsanto Company (Bayer AG)
• Original Assignee: Monsanto Company (Bayer AG)
• Inventors: Van Eenam, Donald N.
• Primary Examiner(s): Michl, Paul R.
• Application Number:
  US06/270,933
• Time in Patent Office: 872 Days
• Field of Search: 260/29.7 NR, 260/29.7 RP, 260/29.7 D, 260/29.7 DP, 260/29.7 UA, 260/29.7 W, 260/29.7 WA, 260/29.7 UP, 162/168 R, 523/408, 525/525
• US Class Current: 523/408
• CPC Class Codes: C08L 2201/52 Aqueous emulsion or latex, e.g. containing polymers of a glass transition temperature (Tg) below 20°C
• CPC Class Codes: C08L 2666/04 Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
• CPC Class Codes: C08L 29/10 Homopolymers or copolymers of unsaturated ethers C08L35/08 takes precedence
• CPC Class Codes: C08L 31/04 Homopolymers or copolymers of vinyl acetate
• CPC Class Codes: C08L 33/08 Homopolymers or copolymers of acrylic acid esters
• CPC Class Codes: C08L 71/02 Polyalkylene oxides
• CPC Class Codes: D21H 17/40 unsaturated

Abstract

Compositions suitable for bonding fibrous substrates comprise a liquid hydrophilic air-curing polymer and an unsaturated thermoplastic polymer latex.

Claims

1. A polymer composition comprising:

(A) from 5 to 99.5 percent by weight of thermoplastic predominantly linear polymer comprising intralinear unsaturated linkages in the form of solid, stably dispersed latex particles; and

(B) from 95 to 0.5 percent by weight of a liquid hydrophilic polymer having a backbone comprising at least one segment with the formula ##STR13## wherein A is a moiety terminating in the residue of an active hydrogen-containing group selected from the group consisting of alcoholic hydroxyl, thiol, amide, carboxylic acid and secondary amine with an active hydrogen removed, E is a moiety containing a radical having an activated olefinic unsaturation either α

,β

of β

,α

to the activating group;

n is the number of adjacent segments having this formula and n and m are integers and are each at least one provided that where either is less than 4, the other is at least four;

all weights being based on the total polymer weight in the composition.

2. A polymer composition according to claim 1 in which Component A is a diene based polymer.

3. A polymer composition according to claim 1 in which Component A is a carboxylated styrene/butadiene copolymer.

4. A polymer composition according to any of claims 1 to 3 in which Component B is the reaction product of a polyol with allyl glycidyl ether.

5. A polymer composition according to any of claims 1 to 3 in which Component B is the product of the reaction of a polyol and allyl glycidyl ether with at least four moles allyl glycidyl ether per hydroxyl group in the polyol.

10. A cellulosic fibrous substrate treated with a polymer composition according to claim 1.

6. A polymer composition comprising:

(A) from 20 to 99 percent by weight of a rubbery thermoplastic polymer selected from the group consisting of polybutadiene, styrene/butadiene copolymer, and carboxylated version of such polymers in the form of an aqueous latex; and

(B) from 80 to 1 percent by weight of a hydrophilic polymer obtained by the reaction of a polyol with at least 4 mols of allyl glycidyl ether per hydroxyl group in the polyol;

all weights being based on the total polymer weight in the composition.

7. A polymer composition according to claim 6 which comprises a surfactant.

8. A polymer composition according to claim 6 which comprises an emulsion having from 5 to 40 percent by weight of polymer content.

9. A polymer composition according to claim 6 comprising polyvinyl alcohol as a viscosity modifier.

11. A cellulosic fibrous substrate treated with a polymer composition according to any of claims 6 to 9.

12. A air-laid cellulosic fiber mat treated with a polymer composition according to any of claims 6 to 9.