Polyurethane foam with soft surface touch
A technology of polyurethane foam and copolymer, which is applied in the field of polyurethane foam and can solve the problems of expensive preparation
Active Publication Date: 2012-09-12
DOW GLOBAL TECH LLC
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
While TPR has a good "feel" and relative ease of processability that are sought or preferred by many consumers, it is unfortunately relatively expensive to manufacture compared to polyurethane foam
Method used
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Embodiment 1
[0083] Example 1 and Example 2 differ in the type of copolymer polyol used. The polyol 3 based material (Example 1 ) showed better performance in terms of low surface hardness and high resistance to compression at 25% deformation.
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Abstract
A polyurethane foam, suitable for shoe soles in particular, and a process to prepare it. This polyurethane has a touch that is similar to that of thermoplastic styrene-butadiene-styrene rubber, but offers reduced cost and easy processability. It is prepared from a formulation including a polyether triol with a hydroxyl value of from 25 to 30 and a molecular weight from 5000 to 7000 g/mol; a polyether diol with a hydroxyl value of from 25 to 30 and a molecular weight from 3000 to less than 5000 g/mol; from 2 to 7 wt% of monoethylene glycol, butanediol, hexanediol or neopentyl glycol as a chain extender; a copolymer polyether polyol having a styrene acrylonitrile solids content of at least 30 wt% and an average hydroxyl number of at least 18; an isocyanate component; and a blowing agent that includes water.
Description
[0001] background 1. Technical field [0002] The present invention relates to the field of polyurethane foams. More particularly, it relates to the field of polyurethane foams with improved surface properties and compressive strength. 2. Background technology [0003] It is known that polyurethane foams can be obtained by reacting isocyanate components with active hydrogen-containing components, such as polyester or polyether polyols, and optionally blowing agents. For processing convenience, it is advantageous in some cases to use isocyanate-terminated prepolymers as the isocyanate component. Such prepolymers can be prepared, for example, by reacting an excess of an aromatic diisocyanate with a relatively low molecular weight diol, such as dipropylene glycol and / or tripropylene glycol. The blowing agent can be an inert physical blowing agent, such as a chlorofluorocarbon, and / or a reactive blowing agent, such as water. The preparation of polyurethane foams by these meth...
Claims
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IPC IPC(8): C08G18/12C08G18/32C08G18/48C08G18/63
CPCC08G18/12C08G18/3206C08G18/4812C08G18/4841C08G18/632C08G2410/00C08G2110/0066C08G2110/0083C08G18/6674
Inventor A.本维努蒂
Owner DOW GLOBAL TECH LLC
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