Free standing film

Patent metadata

Field	Value
Publication number	US-10982175-B2
Application number	US-201816477291-A
Country	US
Kind code	B2
Filing date	Mar 19, 2018
Priority date	Mar 30, 2017
Publication date	Apr 20, 2021
Grant date	Apr 20, 2021

Abstract

A free standing film is provided including: a partially hydrolyzed polyvinyl acetate; a poly(ethylene oxide); a polyalkylene glycol; a plasticizer; optionally, a poly(isobutylene-co-maleic anhydride) copolymer; and optionally an additive. Unit dose packages including the free standing film are also provided.

First claim

We claim:

1. A free standing film, comprising:
19 to 85 wt % of a partially hydrolyzed polyvinyl acetate;
5 to 70 wt % of a poly(ethylene oxide);
1 to 35 wt % of a polyalkylene glycol;
0.5 to 25 wt % of a plasticizer;
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 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 film of claim 2 , wherein the free standing 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 film of claim 3 , wherein the free standing 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 film contains:
0.1 to 0.5 wt % of the nano clay; and
3 to 7 wt % of the defoamer.

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

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

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

8. A unit dose package, comprising:
a free standing 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 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 film.

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

Assignees

• Rohm & Haas
• Dow Global Technologies Llc

Inventors

• Karikari Afua Sarpong
• Jin Xin
• Kao Joseph
• Kaga An
• Gulyas Gyongyi
• Mitchell Michael C

Classifications

• C08J2329/04

  Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids · CPC title

• C08J2429/04

  Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids · CPC title

• C08J2471/02

  Polyalkylene oxides · CPC title

• C11D3/046

  Salts · CPC title

• C08J2429/14

  Homopolymers or copolymers of acetals or ketals obtained by polymerisation of unsaturated acetals or ketals or by after-treatment of polymers of unsaturated alcohols · CPC title