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

Polyurethane resin composition and molded article thereof

A technology of polyurethane resin and composition, applied in the field of polyurethane resin composition, can solve the problems of poor compatibility between organopolysiloxane and polyol, and the molded product is easy to cause blooming, etc., and achieves the effect of excellent low friction.

Active Publication Date: 2014-04-30
DIC CORP
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, although the technology of Patent Document 2 does have some improvement in friction resistance, since the compatibility of organopolysiloxane and polyol is poor, blooming is likely to occur in the obtained molded product, especially when using the one-step method Such adverse conditions are remarkable in the molding of

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Polyurethane resin composition and molded article thereof
  • Polyurethane resin composition and molded article thereof
  • Polyurethane resin composition and molded article thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0058] Hereinafter, although an Example is given and this invention is concretely demonstrated, it is not limited to these Examples. In addition, "part" and "%" in the text are mass standards.

Synthetic example 1

[0059] Synthesis Example 1 (Synthesis of Modified Single-end Silicone Polyol Added with Mole Lactone 16)

[0060]Add the following structural formula (2) [n=33 in the formula] to a 1-liter four-necked flask equipped with a nitrogen inlet tube, a thermometer, a condenser tube, and a stirring device. 500 g of organopolysiloxane (hydroxyl value: 41.1 mgKOH / g, acid value: 0.05 mgKOH / g) without reactive groups, 335 g of ε-caprolactone, and tris(2-ethylhexanoic acid) as a reaction catalyst ) 0.250 g of butyltin, and reacted at 100° C. for 13 hours while blowing nitrogen gas. (As for the end point of the reaction, the non-volatile content (NV) was appropriately measured, and the time when the NV reached 99.5% or more was regarded as the end point.)

[0061] After 13 hours of reaction, since the NV reached 99.7%, the lactone-modified single-end silicone polyol (addition product of 8 moles of lactone per 1 mole of primary hydroxyl group, also called Lc / Si polyol) Remove from flask. ...

Embodiment 1

[0117] Embodiment 1 (prepolymer method)

[0118] (Synthesis of urethane prepolymer)

[0119] 483.0 g of 4,4'-diphenylmethane diisocyanate was added to a 2-liter flask, and 1,000 g of ε-caprolactone-added polyester polyol (molecular weight: 2000) with ethylene glycol as an initiator and synthetic example 1 16.7 g of lactone-modified single-end silicone polyols were mixed and reacted at 70° C. for about 5 hours under a nitrogen atmosphere. Add (adjust) a small amount of 4,4'-diphenylmethane diisocyanate or ε-caprolactone-added polyester polyol so that the NCO equivalent reaches 525 to obtain a silicone-containing urethane prepolymer.

[0120] (manufacturing of urethane elastomer)

[0121] 400 g of silicone-containing urethane prepolymer whose temperature is adjusted to 80° C. and 32.6 g of a 70 / 30 (mass ratio) mixture of 1,4-butanediol / trimethylolpropane adjusted to 50° C. The mixture was mixed, cast into a centrifugal molding machine and cured at 140° C. for 1 hour, and then...

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

PropertyMeasurementUnit
hydroxyl valueaaaaaaaaaa
acid valueaaaaaaaaaa
hydroxyl valueaaaaaaaaaa
Login to View More

Abstract

Provided is a polyurethane resin composition which can be molded by a one-shot method or a prepolymer method using a silicone polyol highly miscible with a polyol to be used as a starting material of a polyurethane resin, and achieves excellent blooming resistance, Si atom aggregability, various physical properties, and low frictional properties when formed into a polyurethane molded article, and also provided is a molded article thereof. The polyurethane resin composition comprises (A) a polyisocyanate and (B) a polyol, and is characterized in that the polyol (B) comprises 0.01 to 5% by mass of a silicone polyol having one end modified with lactone (B1) obtained by the ring-opening addition polymerization of 5 to 10 moles of a lactone monomer at each primary hydroxyl group of an organopolysiloxane having two primary hydroxyl groups at one end and 95 to 99.99% by mass of another polyol (B2).

Description

technical field [0001] The present invention relates to a polyurethane resin composition capable of obtaining a cured polyurethane having excellent blooming resistance, Si atom aggregation, various physical properties, and low friction, and a molded article obtained using the same. Background technique [0002] In recent years, organopolysiloxane compounds have excellent interfacial properties such as low friction, thermal stability, water resistance, defoaming, and mold release. Therefore, in order to improve the performance of synthetic resins such as coatings and molded products, for example, dimethyl Modifiers such as base polysiloxane, methylphenyl polysiloxane, dimethyl polysiloxane containing reactive groups, polyether modified organopolysiloxane, etc. [0003] However, since they have insufficient compatibility with resins and insufficient heat resistance, their range of use is limited. Therefore, for the purpose of improving these disadvantages, a lactone-modified ...

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): C08G18/40C08G18/42C08G18/48
CPCC08G18/4277C08G18/61C08G18/12
Inventor 小田善之须崎弘西村胜英
Owner DIC CORP