Unlock instant, AI-driven research and patent intelligence for your innovation.

Production method of liquid carbamate prepolymer and resin composition

A technology of urethane and production method, which is applied in the field of isocyanate group-terminated urethane prepolymer, and can solve the problems of poor performance such as heat resistance and light resistance resistance

Inactive Publication Date: 2005-01-26
DAINIPPON INK & CHEM INC
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polyurethane polyurea resin prepared by using the prepolymer prepared from propylene oxide polyether has serious defects, that is, poor heat resistance, light resistance, force resistance, etc., so there are many problems in practical application

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0035] The present invention is explained in more detail with reference to the following examples, but the present invention should not be limited by these examples. All "parts" and "%" are by weight unless otherwise specified. In addition, "molecular weight" means the molecular weight calculated from the hydroxyl value.

[0036] Reference example 1

[0037] will be equipped with stirrer, thermometer, N 2 The inlet tube and the four-necked flask of the air-cooled condenser were installed in a jacketed resistance heater, and 1500 parts of polytetramethylene ether glycol (PTGM, molecular weight: 1300) and 1000 parts of ε-hexane were charged into the flask. Lactone monomer (hereinafter referred to as ε-CL) (PTMG / ε-CL=60 / 40). By blowing in N 2 After uniform mixing with stirring, 0.075 parts of tetraisopropyl titanate (30 ppm to the total amount added) was added, and heating was started to increase the temperature to 180°C. Thereafter, the whole was maintained at 180° C. for 5...

example 2

[0039] Synthesize product in the mode of reference example 1, just replace 1500 parts of molecular weight with the PTMG of 1000 molecular weight as 1300 with 1500 parts of molecular weight. The OH value of the product was 64.6 (molecular weight: 1737).

[0040] Reference example 3

[0041] Synthesize product in the mode of reference example 1, just replace 1500 parts of molecular weight with the copolymer of 1250 parts of THF and methyl-THF (PTGL produced by Hodogaya Chemical Co., Ltd., the PTGL) (molecular weight is 1000) that molecular weight is 1300 PTMG, and Change 1000 parts of ε-caprolactone into 1250 parts. The OH value of the product was 55.1 (molecular weight: 2036).

example 4

[0043] Synthesize product in the mode of reference example 1, just replace 1500 parts of PTMG with molecular weight of 1300 with 1250 parts of PTMG of molecular weight of 650, replace 1250 parts of epsilon-caprolactone with 1250 parts of valerolactone monomers. The OH value of the product was 85.0 (molecular weight: 1320).

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A method for producing an isocyanate group-blocked liquid urethane prepolymer which comprises: reacting a lactone-modified diol (3) with a polyfunctional isocyanate (4) to form an isocyanate group-having urethane prepolymer (5), wherein said lactone-modified diol (3) is obtainable by ring-opening addition polymerization of a lactone monomer (2) with a diol (1) selected from the group consisting of a polyalkylene ether diol, a polyester diol and a polycarbonate diol; and then reacting said urethane prepolymer with a blocking agent (6).

Description

technical field [0001] The present invention relates to a method for producing a liquid urethane prepolymer and a resin composition obtained by the method. More precisely, the present invention relates to a process for the production of isocyanate group-terminated urethane prepolymers for use in artificial leather, synthetic leather, coatings, finishes, adhesives, sealants, pressing Sensitive adhesives, films, sheets, molded articles, etc., the prepolymers are liquid even without solvents. The invention also relates to the resin composition prepared by the method. Background technique [0002] In recent years, there has been a need to reduce the content of organic solvents in solution-type resins such as paints in which organic solvents are used in consideration of global environmental regulations. In particular, with the enforcement of the PRTR Act, the revised Industrial Safety and Sanitation Act, and the like, reducing the content of organic solvents and the like has be...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/80C08G18/10C08G18/42C08G18/48
CPCC08G18/4277C08G18/4887C08G18/10C08G18/286C08G18/3234
Inventor 松本泰宏竹内秀行田中宽树
Owner DAINIPPON INK & CHEM INC