Free standing dispersant film

Patent metadata

Field	Value
Publication number	US-11441002-B2
Application number	US-201816606292-A
Country	US
Kind code	B2
Filing date	May 10, 2018
Priority date	May 31, 2017
Publication date	Sep 13, 2022
Grant date	Sep 13, 2022

Abstract

A free standing dispersant film is provided, including: a partially hydrolyzed polyvinyl acetate; a poly(ethylene oxide); a polyalkylene glycol; a plasticizer; a dispersant polymer; optionally, a poly(isobutylene-co-maleic anhydride) copolymer, wherein the poly(isobutylene-co-maleic anhydride) copolymer is at least partially neutralized; and optionally, an optional additive.

First claim

We claim:

1. A free standing dispersant film, comprising:
19 to 85 wt % of a partially hydrolyzed polyvinyl acetate;
5 to 70 wt % of a poly(ethylene oxide), wherein the poly(ethylene oxide) has a weight average molecular weight of 20,000 to 2,000,000 Daltons;
1 to 35 wt % of a polyalkylene glycol, wherein the polyalkylene glycol has a weight average molecular weight of 250 to 5,300 Daltons;
0.5 to 25 wt % of a plasticizer, wherein the plasticizer is selected from the group consisting of 1,2-ethanediol; 1,3-propanediol; 1,2-propanediol; 1,2,3-propanetriol; 1,4-butanediol; 1,5-pentanediol; 1,6-hexanediol; 2,3-butanediol; 1,3-butanediol; 2-methyl-1,3-propanediol; diethylene glycol; triethylene glycol; and mixtures thereof;
2 to 50 wt % of a dispersant polymer, wherein the dispersant polymer is an amphoteric dispersant polymer; wherein the amphoteric dispersant polymer consists of a copolymer of an anionic vinyl monomer and a cationic vinyl monomer; wherein the anionic monomer is selected from at least one of acrylic acid and methacrylic acid; wherein the cationic vinyl monomer is selected from at least one of 2-(dimethylamino)ethyl methacrylate, 2-(diethylamino)ethyl methacrylate and 2-(dipropylamino)ethyl methacrylate;
1 to 7.5 wt % of a poly(isobutylene-co-maleic anhydride) copolymer, wherein the poly(isobutylene-co-maleic anhydride) copolymer is at least partially neutralized; and
0 to 10 wt % of an optional additive.

2. The free standing dispersant film of claim 1 , further comprises:
0.01 to 1.8 wt % of a polyvinyl pyrrolidone;
wherein the weight ratio of the partially hydrolyzed polyvinyl acetate to the polyvinyl pyrrolidone is >10:1.

3. The free standing dispersant film of claim 2 , wherein the free standing dispersant film includes at least one optional additive selected from the group consisting of a nano clay, a defoamer, a crosslinking agent and mixtures thereof.

4. The free standing dispersant film of claim 3 , wherein the free standing dispersant film contains:
0.05 to 0.2 wt % of the polyvinyl pyrrolidone;
wherein the at least one optional additive includes a nano clay and a defoamer; and wherein the free standing dispersant film contains:
0.1 to 0.5 wt % of the nano clay; and
3 to 7 wt % of the defoamer.

5. The free standing dispersant film of claim 1 , wherein the free standing dispersant film is cold water soluble.

6. The free standing dispersant film of claim 1 , wherein the free standing dispersant film forms a cavity.

7. The free standing dispersant film of claim 6 , wherein the cavity is encapsulated by the free standing dispersant film.

8. A unit dose package, comprising:
a free standing dispersant film of claim 1 ; and
a detergent formulation, comprising:
14 to 60 wt % of a surfactant;
3 to 25 wt % of a salt; and
20 to 75 wt % of a water;

wherein the free standing dispersant film forms a cavity; wherein the detergent formulation is disposed within the cavity; and wherein the detergent formulation is in contact with the free standing dispersant film.

9. The unit dose package of claim 8 , wherein the free standing dispersant film encapsulates the cavity.

Assignees

• Rohm & Haas

Inventors

• Pulukkody Randara
• Backer Scott
• Karikari Afua Sarpong
• Mitchell Michael C

Classifications

• C08J2471/02

  Polyalkylene oxides · CPC title

• C11D17/042 Primary

  Water soluble or water disintegrable containers or substrates containing cleaning compositions or additives for cleaning compositions · CPC title

• B65D65/46

  Applications of disintegrable, dissolvable or edible materials · CPC title

• C08J5/18 Primary

  Manufacture of films or sheets · CPC title

• C08L2205/03

  containing three or more polymers in a blend · CPC title