摘要:
A polysiloxane composition comprising (A) a polysiloxane having a group represented by the formula (I): ≡Si—OR (I) wherein, R is a C1 to C18 substituted or unsubstituted monovalent hydrocarbon group or ether bond containing an organic group; and (B) at least 1 ppm of (a) a compound having an N, P, S, Sn, or As component or (b) an acetylene alcohol and a rubber composition containing the same. Specific polysiloxanes (A) contain both formula (I): ≡Si—OR as well as Si—H.
摘要:
A polymer composition for a tire having an air permeation coefficient of 25.times.10.sup.-12 cc.multidot.cm/cm.sup.2 .multidot.sec.multidot.cmHg (at 30.degree. C.) or less and a Young's modulus of 1 to 500 MPa, including (A) at least 10% by weight, based on the weight of the total polymer component, of at least one thermoplastic resin having an air permeation coefficient of not more than 25.times.10.sup.-12 cc.multidot.cm/cm.sup.2 .multidot.sec.multidot.cmHg (at 30.degree. C.) and a Young's modulus of more than 500 MPa and (B) at least 10% by weight, based on the total weight of the polymer component, of at least one elastomer component having an air permeation coefficient of more than 25.times.10.sup.-12 cc.multidot.cm/cm.sup.2 .multidot.sec.multidot.cmHg (at 30.degree. C.) and a Young's modulus of not more than 500 MPa, wherein the total amount (A)+(B) of the component (A) and the component (B) is not less than 30% by weight based on the weight of the total polymer component, and a pneumatic tire obtained therefrom.
摘要翻译:一种轮胎用聚合物组合物,其透气系数为25×10 12 cc×cm 2 / cm 2×sec×cm 3(30℃)以下,杨氏模量为1〜500MPa,包括(A)至少10重量% 至少一种热塑性树脂的透气系数不超过25×10-12 ccxcm / cm2×secxcmHg(30℃)和杨氏模量大于500MPa的聚合物组分的重量,(B) 至少10重量%,基于聚合物组分的总重量,至少一种具有大于25×10 12 cc×cm / cm 2·sec·x·cmHg(30℃)的透气系数的弹性体成分,杨氏模量不大 其中,组分(A)和组分(B)的总量(A)+(B)相对于总聚合物组分的重量为30重量%,得到的充气轮胎 由此。
摘要:
Rubber compositions for automotive tire treads are made up of a selected class of base rubbers and a selected class of synthetic plasticizers in specified amounts. The plasticizer is derived from esterification of a diglycerin or an alkylene oxide adduct of a polyhydric alcohol with a selected class of higher fatty acids. Gripping performance is maintained for a prolonged period of time.
摘要:
A promoter for bonding between a rubber and a steel cord, which is represented by the following general formula (I): ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 may be the same or different from one another and each represents a monocarboxylic radical bonded to the adjacent Co atom through the oxygen atom which is adjacent to the carbonyl group in said monocarboxylic radical; a rubber composition containing the bonding promoter, and rubber products made from the rubber composition.
摘要:
A modified polymer is produced by reacting (A) a polymer with (B) a compound having a nitroxide free radical in the molecule stable at room temperature and in the presence of oxygen, (C) an organic peroxide, and (D) a radically polymerizable monomer having a functional group in the presence of (E) an amine compound comprising a monoamine compound represented by the general formula: NR1R2R3 (R1: C1-C20 alkyl group or aryl group; R2 and R3: H, C1-C20 alkyl group, or aryl group) or a polyamine compound represented by the general formula: (R4)2N(R5N)nR6N(R4)2 (R4: H or C1-C6 alkyl group; R5 and R6: C1-C6 alkylene group; n: 0 to 20). This method can not only reduce the reaction temperature but also improve the modification rate.
摘要翻译:通过使(A)聚合物与(B)在分子中具有氮氧自由基的化合物在室温下和在氧气存在下稳定,(C)有机过氧化物和(D)从根本上反应而制备改性聚合物 在(E)包含由以下通式表示的单胺化合物的胺化合物存在下具有官能团的可聚合单体:(R 1:C 1 -C 20烷基或芳基; R 2和R 3:H,C 1 -C 20烷基 (R4)2N(R5N)nR6N(R4)2(R4:H或C1-C6烷基; R5和R6:C1-C6亚烷基; n = 0)表示的多胺化合物, 0〜20)。 该方法不仅可以降低反应温度,而且可以提高改性率。
摘要:
A thermoplastic elastomer composition containing a dynamically cross-linked composition of (A) 10 to 70 parts by weight of a thermoplastic resin, (B) 30 to 90 parts by weight of a modified butyl rubber composition containing a modified butyl rubber modified reacting, to butyl rubber, (a) a compound containing, in the molecule thereof, a nitroxide free radical stable at ah ordinary temperature in the presence of oxygen, and (c) a bifunctional or higher functional radical polymerizable monomer, and (C) 0.01 to 15 parts by weight of a cross-linking agent.
摘要:
A method for producing a rubber composition, the method including: preparing a modified natural rubber by releasing protein from rubber particles in a natural rubber latex by adding at least one organic compound selected from formaldehyde, paraformaldehyde, formalin, and glyoxal to the above mentioned natural rubber latex and then drying so as to include the released protein therein; and mixing at least one selected from carbon black and silica in this modified natural rubber. Such method reduces viscosity and improves molding processibility of the rubber composition, as well as reducing hysteresis loss.
摘要:
A method for producing an elastomer composition comprising allowing a cross-linked elastomer composition in the presence of (A) a fluid composed of a gaseous substance at an ordinary temperature and an ordinary pressure at a high pressure and (B) at least one component selected from a cross-linkable or polymerizable monomer, oligomer and polymer to thereby impregnate the component (B) into the cross-linked elastomer composition, then cross-linking or polymerizing the impregnated composition.
摘要:
A modified butyl rubber composition comprising a butyl rubber modified by mixing, under heating, (a) a compound having a nitroxide-free radical in the molecule thereof, which is stable at an ordinary temperature even in the presence of oxygen, (b) a radical initiator, and (c) a bi- or more-functional radical polymerizable monomer and further by compounded with (d) a bi- or more-functional radical polymerizable monomer, which is different from the ingredient (c).
摘要:
A method for modifying a polymer comprising modifying a polymer capable of decomposing with a carbon radical in the molecule thereof by a reaction with a radical initiator and a compound having a nitroxide radical in the molecule thereof to thereby decrease a molecular weight of the polymer and also to thereby introduce an organic group derived from the free radical into the polymer.