Lactone-modified polyvinyl alcohol, a process for the preparation thereof

• US 5,612,412 A
• Filed: 06/07/1995
• Issued: 03/18/1997
• Est. Priority Date: 09/30/1994
• Status: Expired due to Fees

• Current Assignee: Daicel Chemical Industries Limited
• Original Assignee: Daicel Chemical Industries Limited
• Inventors: Watanabe, Kazushi, Sagane, Hiroshi, Fujiwa, Takaaki, Isobe, Tomohisa
• Primary Examiner(s): YOON, TAE H
• Application Number:
  US08/476,676
• Time in Patent Office: 650 Days
• Field of Search: 525/58, 525/60, 525/62, 526/270
• US Class Current: 525/58
• CPC Class Codes: C08F 16/06 Polyvinyl alcohol ; Vinyl alcohol
• CPC Class Codes: C08F 8/16 Lactonisation
• CPC Class Codes: C08G 63/00 Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule polyester-amides C08G69/44; polyester-imides C08G73/16
• CPC Class Codes: C08L 101/00 Compositions of unspecified macromolecular compounds
• CPC Class Codes: C08L 2201/04 Antistatic
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 29/00 Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 87/00 Compositions of unspecified macromolecular compounds, obtained otherwise than by polymerisation reactions only involving unsaturated carbon-to-carbon bonds

Abstract

Disclosed are a lactone-modified polyvinyl alcohol and a process for the preparation thereof, a polymer composition, a permanently anti-electrostatic resin composition, a lactone-modified resin having hydroxyl groups, and a process for the preparation thereof.

The lactone-modified polyvinyl alcohol can be used in wide fields owing to capability of freely adjusting a water solubility such as water-soluble, gradually water-soluble, low water-soluble, and water-insoluble by a degree modified by lactone compounds, and owing to possessing both properties in PVA and lactones.

Furthermore, the lactone-modified polyvinyl alcohol has a property as plasticizers or softening agents, as a result, there can be provided a polymer composition having an excellent property by mixing with hydrophilic polymer or polar polymer.

Still further, a blend resin composition in which a variety of resins are blended with the lactone-modified polyvinyl alcohol has an excellent permanently-anti-electrostatic property, and the resin composition having a permanently-anti-electrostatic property can be preferably employed as a variety of molded articles such as parts for electric appliances, textiles, films, etc.

Claims

1. A lactone-modified polyvinyl alcohol which comprises having the structure represented by General Formula (1) described below ##STR11## [wherein, x, y, and z are a composition by mol in the respective components, having a range of 0≦

x≦

95, 0≦

y≦

30, 5≦

z≦

100, x+y+z is 100, respective components shown by x, y, and z are randomly connected, R^a and R^b are an independent hydrogen atom or a methyl group, m is a natural number ranging from 2 to 10, R¹ is a hydrogen atom or an acetyl group, n is an average number of a lactone monomer to be added, and a range of 1≦

n≦

100].

2. A lactone-modified polyvinyl alcohol as set forth in claim 1, wherein said x, y, and z are 20≦

x≦

60, 0≦

y≦

30, 40≦

z≦

80, x+y+z is 100, and n is 1≦

n≦

10.

3. A lactone-modified polyvinyl alcohol as set forth in claim 1, wherein said x, y, and z are 60≦

x≦

95, 0≦

y≦

30, 5≦

z≦

40, x+y+z is 100, and n is 1≦

n≦

3.

4. A lactone-modified polyvinyl alcohol as set forth in claim 1, wherein said R^a and R^b are a hydrogen atom, respectively, and m is 5.

5. A process for the preparation of the lactone-modified polyvinyl alcohol as set forth in claim 1, which comprises kneading 5-95 parts by weight of a polyvinyl alcohol with 95-5 parts by weight of a lactone monomer (total of both is 100 parts by weight) and 0.001-0.1 parts by weight of a polymerization catalyst while melting at a temperature of 50°

-250°

C.