# US 5,332,774 A · Polyvinyl acetal resins based on hydroxyaldehydes and use of the resins in laminar structures

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

- Number: US 5,332,774 A
- Document ID: US5332774A
- Status: Granted
- Kind: A
- Application number: 07/963,298
- Filed: 1992-10-16
- Granted: 1994-07-26
- Earliest claimed: 1992-10-16
- Assignees: Arco Chemical Technology, L.P.
- Inventors: Jeffrey A. Klang; Michael J. Cannarsa; Frank J. Liotta, Jr.; Scott E. Smyth
- Web page: https://patentgrep.com/patent/US5332774A

## CPC

- B32B 17/10761: {containing vinyl acetal}
- C08F 8/14: Esterification
- C08F 8/28: Condensation with aldehydes or ketones
- C08K 5/06: Ethers; Acetals; Ketals; Ortho-esters
- C08L 29/14: Homopolymers or copolymers of acetals or ketals obtained by polymerisation of unsaturated acetals or ketals or by after-treatment of polymers of unsaturated alcohols
- C08L 71/00: Compositions of polyethers obtained by reactions forming an ether link in the main chain (of polyacetals C08L59/00; of epoxy resins C08L63/00; of polythioether-ethers C08L81/02; of polyether-sulfones C08L81/06); Compositions of derivatives of such polymers
- Y10T 428/31645: Next to addition polymer from unsaturated monomers
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Plasticized polyvinyl acetal resins based on 4-hydroxybutanal are disclosed. Laminar structures that include the resins, a process for making the resins, and a process for making an internally plasticized polyvinyl acetal resin by esterification, are also revealed.

## Claims

### Claim 1

A plasticized polyvinyl acetal composition comprising:
(a) a polyvinyl acetal resin derived from polyvinyl alcohol and 4-hydroxybutanal; and
(b) a plasticizer selected from the group consisting of C.sub.2 -C.sub.30 aliphatic mono-, di-, and polyfunctional alcohols, ethers, and glycol ethers; polyoxyalkylene polyols; and ethers derived from polyoxyalkylene polyols.

### Claim 2 (depends on 1)

The composition of claim 1 wherein the polyvinyl acetal resin is derived from polyvinyl alcohol, 4-hydroxybutanal, and 3-hydroxy-2-methylpropanal.

### Claim 3 (depends on 1)

The composition of claim 1 wherein the plasticizer is selected from the group consisting of difunctional C.sub.2 -C.sub.30 aliphatic alcohols and ethers.

### Claim 4 (depends on 1)

The composition of claim 1 wherein the composition includes from about 50 to about 95 weight percent of the polyvinyl acetal resin and from about 5 to about 50 weight percent of the plasticizer.

### Claim 5 (depends on 1)

The composition of claim 1 wherein the polyvinyl acetal resin is a co-acetal derived from polyvinyl alcohol, 4-hydroxybutanal, and n-butyraldehyde.

### Claim 6 (depends on 5)

The composition of claim 5 wherein the weight ratio of n-butyraldehyde to 4-hydroxybutanal in the polyvinyl acetal resin is within the range of about 1:1 to about 100:1.