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Prepolymers and polymers for elastomers

An elastomer and prepolymer technology, applied in the field of polyurethane, can solve the problem of less application

Inactive Publication Date: 2010-08-11
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

While polyols prepared from natural oils have been used in some polyurethanes, especially slabstock foams, these polyols have had little use in elastomeric polyurethanes

Method used

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  • Prepolymers and polymers for elastomers
  • Prepolymers and polymers for elastomers
  • Prepolymers and polymers for elastomers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-2

[0136] Examples 1-2 and Comparative Samples A and B

[0137] For each of Examples 1-2 and Comparative Samples A and B, the amounts and types of polyols and isocyanates shown in Table 1 were combined in a glass reactor having a volume of approximately 200 ml and stirred under a nitrogen atmosphere. The polyol was reacted with the isocyanate at a temperature of 80°C for 4 hours without catalysis to form a prepolymer. The resulting prepolymer was then characterized for free isocyanate content by the procedure of ASTM d5155 to confirm completion of the reaction. Then, in the presence of 0.01% by weight of the total reaction mixture dibutyltin dilaurate catalyst (commercially available as Dabco T-12 from Air Products), the prepolymer was mixed with 1,4-butylene in the amount shown in Table 1. Diols (BDO) were reacted by combining them in a tri-pour container with a volume of 200 ml and stirring manually using a spatula at a temperature of 50° C. for a period of 10 minutes to initi...

Embodiment 3

[0149] The procedure of Example 3 was used to prepare the foam coated blanket samples of Comparative Sample C, except that Comparative Sample C was used in which the polyol blend consisted of 4691 g POLY-1, 1768 g NOPO-E and 615 g diethylene glycol Preparation of formulations made from diols.

[0150] Table 3 shows the ASTM test results for the films of Comparative Sample C and Example 3.

[0151] Column 2 of this table lists the ASTM test number for each test except viscosity using a Brookfield viscometer using a #7 spindle at set temperature and speed in revolutions per minute (RPM) (in Table 3). , measured at 20 RPM at 10°C); cure time is recorded as the time from placing the sample in an oven at 129°C until its surface reaches 110°C; gel time is recorded as the time from the addition of the catalyst to the time the material was measured using a #7 spindle The time when the viscosity is at least 100,000 cp; and the tensile strength is measured according to the procedure of...

Embodiment 4-9

[0157] Examples 4-9 and comparative samples D-G

[0158] For each of Examples 4-9 and Comparative Samples D-G, the amounts and types of polyols and isocyanates in Table 4 were combined in a glass reactor with a volume of approximately 140 ml and stirred under a nitrogen blanket. Benzoyl chloride droplets were added to make the reaction medium slightly acidic. The polyol and isocyanate were reacted at a temperature of 80° C. for 4 hours without a catalyst to form a prepolymer. The resulting prepolymer was then characterized for free isocyanate content according to the procedure of ASTM d5155 to confirm completion of the reaction. The prepolymer was then reacted with the amounts and types of chain extenders shown in Table 4 at a stoichiometric ratio of 1.05:1. The reaction mixture was then poured into a press with dimensions 16 x 16 cm where it was pressed at 140 MPa, 80° C. for 1 hour to form a sheet. The sheet was then removed from the heated press and placed in an oven at ...

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Abstract

A prepolymer or elastomer is the reaction product of reactants (a) at least one polyester polyol or fatty acid derived polyol which is the reaction product of at least one initiator and a mixture of fatty acids or derivatives of fatty acids comprising at least about 45 weight percent monounsaturated fatty acids or derivatives thereof, (b) optionally, at least one polyol which is different from the polyol of (a); and (c) at least one isocyanate compound (herein after isocyanate) having an average of at least about 1.8 isocyanate groups per molecule. A process comprises admixing reactants (a) at least one polyol composition comprising the fatty acid derived polyol which is the reaction product of at least one initiator and a mixture of fatty acids or derivatives of fatty acids comprising at least about any of 45 weight percent monounsaturated fatty acids or derivatives thereof; and (b) at least one isocyanate having an average functionality of at least about 1.8 under reaction conditions to form a reaction product which is an elastomer or prepolymer is formed therefrom. An article, coating or thermoplastic polyurethane comprises the elastomer is formed from the prepolymer of or using the process of the invention.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of U.S. Provisional Patent Application Serial No. 60 / 959,304, entitled "Prepolymers and Polymers for Elastomers," filed July 12, 2007, which is hereby incorporated by reference incorporated into this application. technical field [0003] The present invention relates to polyols, prepolymers, in particular isocyanates, and prepolymers of the polyols, preferably prepolymers useful for preparing elastomers, and polyurethanes prepared from the polyols, prepolymers or combinations thereof . Background technique [0004] Elastomeric polyurethanes are known in the art and their uses range from shoe soles and fibers, to coatings and plastic parts. Such elastomeric polyurethanes are typically manufactured from materials such as polyether polyols derived from olefin oxides originally of petroleum origin. It is desirable to manufacture elastomeric polyurethanes using renewable resources such...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/08C08G18/10C08G18/40C08G18/42C08G18/48C08J9/30
CPCC08G18/4841C08G2101/0008C08J2375/04C08G18/4018C08G18/10C08G18/4833C08G18/0885C08J9/30C08G18/4288C08G2110/0008Y10T428/139C08G18/3275C08G18/3206C08G18/40
Inventor 威廉·库恩斯德怀特·莱瑟姆兰达尔·詹基尼斯德布库马·巴塔查吉泽农·莱森科陈宏宇马克·索南夏因克劳斯·席勒科拉·莱比格艾伦·施罗克
Owner DOW GLOBAL TECH LLC
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