Thermoplastic elastomer composition, formed body and composite formed body
一种热塑性弹性体、组合物的技术，应用在其成形体以及复合成形体,热塑性弹性体组合物领域，能够解决成形周期延长增多、机械强度易降低、形状保持性变差等问题，达到柔软性优良、压缩永久变形优良的效果
Inactive Publication Date: 2005-06-01
RIKEN TECHNOS CORP
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- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0006] However, the cross-linked composition of the hydrogenated block copolymer disclosed in the above-mentioned gazette has the problem that the compression set at high temperature, especially at 100°C, is not enough, and the mechanical strength tends to decrease. Current status of the performance level required by the application
In addition, during extrusion molding, the melt tension at high temperature is lowered, resulting in poor shape retention, and during injection molding, there are more problems in molding processing such as prolonging the molding cycle.
[0007] Moreover, the composition disclosed in the above-mentioned gazette has a Shore A hardness of more than 40, although it can be softened by increasing the amount of softener added, but in this case, the current situation is that there is stickiness on the surface of the molded product. The softener oozes out under thermal stress, which is not good for practical use
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1～8 and comparative example 1～16
[0124] The ingredients in the amounts shown in Tables 1 to 4 were added to a twin-screw extruder with an L / D of 47, melted and kneaded at a kneading temperature of 180° C. and a screw speed of 350 rpm, and granulated. Next, the pellets obtained by injection molding were formed into test pieces, which were used for each test. The evaluation results are shown in Tables 1 to 4.
[0125] Example
1
2
3
4
Group
become
become
share
Ingredient (a-1)SEPS
parts by weight
100
100
100
100
Ingredient (b) PW90
parts by weight
100
100
100
100
Ingredient (c-1) Endex155
parts by weight
20
10
0
20
Ingredient (c-2) Kriatalex 5140
parts by weight
0
15
25
0
Ingredient (d) peroxide
parts by weight
0.15
0.15
0.15
0
Ingredient (e) NK Ester 3G
parts by...
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Abstract
The present invention relates to a thermoplastic elastomer composition, its molded body and composite molded body. Provides a thermoplastic elastomer composition excellent in flexibility, (short-term and long-term) compression set, oil resistance, and suppression of softener bleed, its molded article and composite molded article. The present invention relates to melt mixing containing: (a) a block composed of at least two polymer blocks A mainly composed of aromatic vinyl compounds and at least one polymer block B mainly composed of conjugated diene compounds 100 parts by weight of a hydrogenated block copolymer obtained by hydrogenating the copolymer or a hydrogenated product of a conjugated diene compound block copolymer, (b) 50 to 120 parts by weight of a softener for non-aromatic rubber, and ( c) A combination of 10 to 50 parts by weight of a petroleum hydrocarbon resin having a softening point of 80 to 170°C and a melt viscosity of 10 Pa·s at a temperature of 120 to 250°C, and (d) 0.01 to 3.0 parts by weight of an organic peroxide The thermoplastic elastomer composition, its molded body and composite molded body obtained.
Description
technical field [0001] The present invention relates to a thermoplastic elastomer composition, its molded article, and a composite molded article, and particularly relates to a thermoplastic elastomer composition excellent in flexibility, (short-term and long-term) compression set, molding processability, and capable of suppressing exudation of a softener , its shaped body and composite shaped body. Background technique [0002] In recent years, as a soft material with rubber elasticity, thermosetting elastomers that do not require a vulcanization process, have the same molding processability and recyclability as thermoplastic resins, are widely used in automotive parts, home appliance parts, wire coatings, medical Used parts, shoes, sundries and other fields. [0003] In thermoplastic elastomers, block copolymers of aromatic vinyl compounds-conjugated diene compounds are styrene-butadiene block copolymers (SBS) and styrene-isoprene block copolymers (SIS) ) and other polys...
Claims
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IPC IPC(8): C08K5/10C08K5/14C08L23/10C08J5/00C08L53/02C08L57/02
CPCC08L53/025C08L2666/02
Inventor 田坂道久须加贵明
Owner RIKEN TECHNOS CORP