# US 5,708,073 A · Non-aqueous, base-degradable polyurethane

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 5,708,073 A
- Document ID: US5708073A
- Status: Granted
- Kind: A
- Application number: 08/652,884
- Filed: 1996-05-23
- Granted: 1998-01-13
- Earliest claimed: 1996-05-23
- Assignees: Bayer Aktiengesellschaft
- Inventors: Jeffrey A. Dodge; Ashok M. Sarpeshkar; Peter H. Markusch; Jeffrey F. Dormish
- Web page: https://patentgrep.com/patent/US5708073A

## CPC

- C08G 18/4244: {containing oxygen in the form of ether groups}
- C05G 5/37: {layered or coated with a polymer}
- C08G 18/0819: {containing anionic or anionogenic groups}
- C08G 18/283: {Compounds containing ether groups, e.g. oxyalkylated monohydroxy compounds}
- C08G 18/4238: {derived from dicarboxylic acids and dialcohols}
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C05G: MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS (organic fertilisers containing added bacterial cultures, mycelia, or the like C05F11/08; organic fertilisers containing plant vitamins or hormones C05F11/10); FERTILISERS CHARACTERISED BY THEIR FORM

## Abstract

The present invention is directed to a non-aqueous, base-degradable polyurethane. The polyurethane is prepared by reacting an organic polyisocyanate with a hydroxyl group containing hydrophilic composition. The hydrophilic composition must have specified amounts of ionic or acidic groups and specific amounts of polyester groups. In a preferred embodiment, the hydrophilic composition also contains polyoxyethylene groups.

## Claims

### Claim 1

A non aqueous, based-degradable polyurethane composition comprising the reaction product of:
a) an organic polyisocyanate, with
b) a hydroxyl group containing hydrophilic composition, said hydrophilic composition having an average hydroxyl functionality of from 1.5 to about 4 and containing,
i) at least 0.1% by weight, based upon the total weight of said hydrophilic composition, of one or more ionic or acidic groups selected from the group consisting of carboxylate, sulfonate, carboxylic acid and sulfonic acid, and
ii) at least 25% by weight, based upon the total weight of said hydrophilic composition, of carboxylic acid ester groups,
iii) at least 20% by weight, based upon the total weight of said hydrophilic composition, of polyoxyethylene groups of at least 5 oxyethylene units in length, and wherein said hydrophilic composition comprises:
b)1) from 50 to 95% by weight, based upon the total weight of said hydrophilic composition, of one or more non-ionic polyester polyols having molecular weights of from 200 to 6000,
b)2) from 1 to 50% by weight, based upon the total weight of said hydrophilic composition, of one or more organic hydroxy group-containing materials having number average molecular weights of from 92 to 500 and containing one or more ionic or acidic groups selected from the group consisting of carboxylate, sulfonate, carboxylic acid and sulfonic acid, and
b)3) from 0 to 45% by weight, based upon the total weight of said hydrophilic composition, of one or more hydroxyl functional organic compounds having number average molecular weights for from 600 to 6000, having hydroxyl functionalities of from 1 to 4, and containing no ester groups, wherein components b)1), b)2) and b)3) total 100%, and
wherein components a) and b) are reacted at an isocyanate index of from about 80 to about 150.

### Claim 2 (depends on 1)

The composition of claim 1, wherein said hydrophilic composition comprises from i) at least 0.4 to 2.5% by weight, based upon the total weight of said hydrophilic composition, of one or more ionic or acidic groups selected from the group consisting of carboxylate, sulfonate, carboxylic acid and sulfonic acid, ii) from 25 to 50% by weight, based upon the total weight of said hydrophilic composition, of carboxylic acid ester groups, and iii) from 30 to 50% by weight based upon the total weight of said hydrophilic composition, of polyoxyethylene groups of at least 5 oxyethylene units in length.